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Repair Information Neutral Adjustments For Hydrostatic Drive Tractors Volume I Fifth Edition (1975 1997 Model Year) Rev. 7/1999 TP 500-1220-06-XX-SMA
MANUFACTURING INC. 500 N. Spring Street / PO Box 997 Port Washington, WI 53074-0997 USA www.simplicitymfg.com Copyright 1999, Simplicity Manfacturing, Inc. All Rights Reserved. Printed in USA
Table of Contents Page Section 1. Commercial Front-Cut Riders with Dual Eaton Model 7 Hydrostatic...6 SIMPLICITY AGCO ALLIS MASSEY FERGUSON CFC Series/Procut 3000 Series 1691969-20 HP 1691968-20 HP 1691967-18 HP 1691966-18 HP 1691965-16 HP 1691964-16 HP 1691846-20 HP 1691845-20 HP 1691844-18 HP 1691843-18 HP 1691842-16 HP 1691841-16 HP 1691975-20 HP 1691974-18 HP 1691973-16 HP 1691972-20 HP 1 1691971-18 HP 1691970-16 HP 1691882-16 HP 1691876-18 HP Section 2. Large-Frame Tractors with Shaft Drive - Sundstrand Model 15 Hydrostatic (Peerless 2600-002 or 2600-008)... 11 SIMPLICITY AGCO ALLIS MASSEY FERGUSON 18 & 20 GTH & SunStar Series 1900 & Ultima Series 2900 Series 1692521-18 HP 1692456-20 HP 1692454-20 HP 1692135-20 HP 1692133-20 HP 1692131-18 HP 1691953-20 HP 1691926-20 HP 1691924-18 HP 1691710-20 HP 1691528-18 HP 1691381-20 HP 1691380-18 HP 1691357-16 HP 1691250-14 HP 1691018-20 HP 1691017-18 HP 1692523-18HP 1692460-20 HP 1692458-20 HP 1692141-20 HP 1692139-20 HP 1692137-18 HP 1691955-20 HP 1691397-18 HP 1691392-20 HP 1691391-18 HP 1691389-16 HP 1691387-14 HP 1691307-18 HP 1691020-20 HP 1691019-18 HP 1692525-18 HP 1692507-20 HP 1692505-20 HP Section 3. Large-Frame Tractors with Belt Driven - Sundstrand Model 15 Hydrostatic...12 SIMPLICITY Sovereign, 17GTH-L, AGCO ALLIS MASSEY FERGUSON 7000 & 7100 Series, 7790 900 & 700 Series 2800 Series 1692798-18 HP 1692796-18 HP 1692450-18 HP 1692143-18 HP 1691957-17 HP 1691717-17 HP 1691382-16 HP 1690890-18.5 HP 1690723-14 HP 1690640-19 HP 1690638-19 HP 1690572-17 HP 1690571-17 HP 1690570-16 HP 1692631-16 HP 1692442-18 HP 1692440-16 HP 1690569-16 HP 1690480-17 HP 1690479-17 HP 1690478-16 HP 1690477-16 HP 1690473-12 HP 1690433-18 HP 1690431-18 HP 1690429-16 HP 1690427-16 HP 1690352-12 HP 1690342-16 HP 1690202-16 HP 1690006-16 HP 1692042-16 HP 1692006-18 HP 1692847-18 HP 1692845-18 HP 1692452-18 HP 1692144-18 HP 1691960-17 HP 1691718-17 HP 1691383-16 HP 1691139-18.5 HP 1691124-14 HP 1691122-16 HP 1690894-18.5 HP 1690727-14 HP 1692633-16 HP 1692448-18 HP 1692446-16 HP 1690642-19 HP 1690575-16 HP 1690574-17 HP 1690519-17 HP 1690516-12 HP 1690367-18 HP 1690217-12 HP 1690214-12 HP 1690211-16 HP 1690076-12 HP 1690014-16 HP 1692044-16 HP 1692036-18 HP 1692852-18 HP 1692849-18 HP 1692503-18 HP Section 4. Tractors with Tuff Torq K215-A & HydroGear (Sundstrand) Hydrostatic, BDU-21L... 13 SIMPLICITY AGCO ALLIS MASSEY FERGUSON Landlord, 18, 16GTH Series 1700 Series 2700 Series 1692501-18 HP
Table of Contents (Continued) Tractors with Hydro-Gear 216-3010L Hydrostatic Transaxle...15 SIMPLICITY AGCO ALLIS MASSEY FERGUSON Landlord Series 1700 Series 2700 Series 1692788-18 HP 1692786-17 HP 1692784-16 HP Section 5. Tractors with Eaton 850 Transaxle...17 SIMPLICITY AGCO ALLIS MASSEY FERGUSON 17, 16GTH & 6500 Series 1800 Series 1691824-17 HP 1691766-16 HP 1691732-17 HP 1691263-16 HP 1691769-16 HP 1691682-17 HP 1691560-14 HP 1691471-16 HP 1691470-13 HP Section 6. Tractors with Tuff Torq K60 Hydrostatic Transaxle...18 SIMPLICITY AGCO ALLIS MASSEY FERGUSON Broadmoor, 12.5 & 16LTH Series 1600 Series 1692182-14 HP 1692073-12.5 HP 1692071-16 HP 1692184-14 HP 1692076-13 HP 1692075-16 HP Tractors with HydroGear 311-0750/311-0800 Transaxle...19 SIMPLICITY AGCO ALLIS MASSEY FERGUSON Broadmoor Series 1600 Series 2600 Series 1692776-16 HP 1692774-15 HP 1692772-14 HP 1692609-15 HP 1692528-15 HP 1692420-16 HP 1692416-14 HP 1692414-14 HP 1692283-16 HP 1692279-14 HP 1692261-12.5 HP 1692813-16 HP 1692811-15 HP 1692809-14 HP 1692613-15 HP 1692530-15 HP 1692436-16 HP 1692432-14 HP 1692430-14 HP 1692285-16 HP 1692281-14 HP 1692265-12.5 HP 1692817-16 HP 1692815-15 HP 1692499-16 HP 1692497-14 HP Lawn Tractors with Eaton 750 or 751 Hydrostatic Transaxle...21 SIMPLICITY AGCO ALLIS MASSEY FERGUSON Broadmoor, 12.5 & 16LTH Series 1600 Series 1691886-12.5 HP 1691807-16 HP 1692576-18 HP 1692572-16 HP 1692841-18 HP 1692839-17 HP 1692837-16 HP 1692578-18 HP 1692574-16 HP 1691795-12.5 HP 1691888-13 HP 1691817-13 HP 1692854-17 HP 1692843-18 HP 1692580-18 HP Page Section 7. Lawn Tractors with HydroGear (Formerly Agri-Fab) Sundstrand BDU10S Transaxle...25 SIMPLICITY AGCO ALLIS MASSEY FERGUSON Regent, 12LT & 12RT Series 500 Series & 612H 1692156-12.5 HP 1692053-12 HP 1691931-12 HP 1692164-12.5 HP 1692057-12 HP 1691933-12 HP 2
Table of Contents (Continued) Section 7. (Continued) Lawn Tractors with HydroGear 310-0500 Transaxle (With Hand Control)...27 SIMPLICITY AGCO ALLIS MASSEY FERGUSON Regent Series 500 Series 2500 Series 1692403-12.5 HP 1692259-12.5 HP 1692412-12.5 HP 1692263-12.5 HP 1692495-12.5 HP Lawn Tractors with HydroGear 318-0500/322-0500 Transaxle (With Foot Control)...28 SIMPLICITY AGCO ALLIS MASSEY FERGUSON Regent Series 500 Series 2500 Series 1692354-14 HP 1692588-14 HP 1692591-14 HP Lawn Tractors with HydroGear 322-0650 Transaxle (With Foot Control)...28 SIMPLICITY AGCO ALLIS MASSEY FERGUSON Regent Series 500 Series 2500 Series 1692762-16 HP 1692831-16 HP 1692835-16 HP Section 8. Lawn Tractors with Eaton Model 7 Hydrostatic & Peerless 1300 Series Transaxle... 30 SIMPLICITY AGCO ALLIS MASSEY FERGUSON 5200 & 4200 Series 600 Series 1691649-16 HP 1691473-12.5 HP 1691362-16 HP 1691340-12 HP 1691271-12 HP 1691235-12.5 HP 1691234-12.5 HP 1691033-16 HP 1691032-16 HP 1691029-11 HP 1690936-16 HP 1690919-16 HP 1690912-11 HP 1690881-16 HP 1690853-16 HP 1690846-11 HP 1690810-16 HP 1690759-11 HP 1691479-12 HP 1691477-13 HP 1691475-16 HP 1691432-13 HP 1691276-12 HP 1691237-13 HP 1691236-13 HP 1691044-16 HP 1691043-16 HP 1691040-11 HP 1690960-16 HP 1690954-16 HP 1690947-11 HP 1690887-16 HP 1690875-16 HP 1690868-11 HP 1690763-11 HP Section 9. Later Model Front-Cut Riders with Eaton Model 7 Hydrostatic...31 SIMPLICITY AGCO ALLIS MASSEY FERGUSON FC Series Front-Cut 1300 Series Front-Cut 2300 Series 1692375-16 HP 1692311-16 HP 1692309-12.5 HP 1692014-12.5 HP 1691656-16 HP 1691655-12 HP 1692375-16 HP 1692312-16 HP 1692310-12.5 HP 1692022-12.5 HP 1691660-16 HP 1691659-12 HP 1692512-16 HP Section 10. Early Model Front-Cut Riders with Eaton Model 7 Hydrostatic...32 SIMPLICITY AGCO ALLIS MASSEY FERGUSON SunRunner Series Vanguard Series 1691331-12 HP 1691336-12 HP Page 3
Table of Contents (Continued) Section 11. Mid-Engine Riding Mowers with HydroGear 311-0500...33 SIMPLICITY AGCO ALLIS MASSEY FERGUSON Coronet Series 400 Series 2400 Series 1692750-13 HP 1692515-12.5 HP 1692385-12.5 HP 1692130-12.5 HP 1692821-13 HP 1692519-12.5 HP 1692399-12.5 HP 1692176-12.5 HP 1692491-12.5 HP Transmission Purging This procedure applies to the following models: Simplicity - Regent & Coronet Series AGCO Allis - 500 & 400 Series Massey Ferguson - 2500 & 2400 Series The following is a purging procedure for products that use the Hydro-Gear transmission. Use this procedure if air has become trapped in the transmission during shipment, storage, or during an oil change. Purge the transmission if it lacks drive in forward or reverse. 1. Park the tractor on a flat, level surface. 2. Place the hydro release lever in the PUSH position by pulling rearward on the lever. The lever is located under the rear right-hand corner of the frame. 3. Start the tractor engine and run at low idle. 4. Move the ground speed control lever to the neutral gate. 5. Return the control lever to the neutral gate. 6. Place the hydro release lever (A) in the DRIVE position by pushing the lever fully forward. 7. Drive the tractor for at least five feet in forward and reverse directions with full throttle and full ground speed. Repeat this procedure three times in the forward and reverse directions. Repeat the above steps if the tractor has noisy or erratic operation, lack of performance after transmission warm up, or oil leakage from transaxle vent tube. 4
Introduction This manual assumes all clutch and brake adjustments have been made, and that transmission control linkages are in good serviceable condition. Worn parts, broken or weak springs, fasteners, and bushings should be replaced as necessary before attempting to make adjustments. It is possible during adjustments to place yourself in a position which is more hazardous than when the unit is in normal operation. Safety is a matter of common sense... a matter of thinking before acting. Familiarize yourself with the product and pay special attention to all safety warnings. These adjustments are meant to minimize creep when controls are placed in the neutral position. Hydrostatic transmissions should never be relied upon to hold a tractor in a parked position. The parking brake should be set and engine stopped whenever leaving the tractor. NOTE: PUSHING THE TRACTOR BY HAND 1. Disengage the PTO and turn the engine off. 2. Move the transmission release lever to PUSH position. The tractor can now be pushed by hand. Towing the tractor with another vehicle is not recommended, as the transmission may be damaged. WARNING When making adjustment, keep hands, hair, clothing, and tools away from rotating belts. Careless or improper attention may result in serious injury. 5
Section 1. Commercial Front-Cut Rider with Dual Eaton Model 7 Hydrostatic Wheel-Steer Adjustments Neutral 1. Make sure that the steering wheel is springcentered in the straight-forward position. If spring pulls steering wheel off-center, loosen the nut securing the anchor bolt (G) and move bolt in slot until wheel is pointing straight ahead. Retighten nut and recheck steering wheel alignment. 2. Check the alignment of the rear edges of bars (I, figure 1-1) and transmission control shafts (C and D). Rear edges should be aligned as shown in figure 1-1. To adjust linkage, first loosen jamnuts (A), remove the nut securing the ball joint (H), and rotate ball joint until alignment is correct. Retighten all hardware. 3. Block frame so that wheels are off the ground. Increase the engine RPM level and move foot pedal forward and reverse several times. Spring tension should return foot pedal to neutral. 4. If wheels rotate in neutral, loosen nuts (B, figure 1-1) on each side of the hydro pump linkage (F). Turn either front or rear nut until wheel stops rotating. 5. Tighten nuts, making sure control rods do not change position. This may take several times to position rods at exact neutral. 6. Remove frame blocking and test operate. Rider should not move with foot pedal in neutral position. Figure 1-1. A. Steering Linkage Adjustment Nuts B. Neutral Adjustment Nuts C. Left Hand Transmission Control Shaft D. Right Hand Transmission Control Shaft E. Steering Linkage F. Hydro Pump Linkage G. Spring-Centering Bolt H. Ball Joint I. Bar Transmission Speed Variation If rider pulls to one side with the steering wheel in a straight forward position, the hydro pump linkage can be adjusted to correct for unequal pump output. This adjustment limits the output of a faster hydro pump at less than maximum forward speed. Refer to Forward Travel Stop Adjustment for maximum forward speed adjustment. To adjust hydro pump linkage (A, figure 1-2), loosen retaining hardware and move linkage upward in slot (B) to reduce hydro pump output. Retighten flange locknut (C) after adjustment is complete. Figure 1-2. A. Hydro Pump Linkage B. Adjustment Slot C. Flange Locknut 6
Section 1. (Continued) Commercial Front-Cut Rider with Dual Eaton Model 7 Hydrostatic Ground Speed Control The position and angle of the foot pedal (A, figure 1-3) can be adjusted by loosening taptite screw (B) and moving pedal in slot. This adjustment should not affect rider speed or neutral adjustment. Figure 1-3. A. Foot Pedal B. Adjustment Capscrew Lever-Steer Adjustments Control Levers The control levers have slotted holes for mounting and can be positioned for the most comfortable operating position. When in neutral, the handles should be opposite each other. To adjust the angle of lever, loosen capscrew (A, figure 1-4). Adjust lever position and retighten capscrew. Neutral gate brackets (B) must be adjusted so that new position of lever will be aligned with neutral gate (C) when rider is in neutral. In the operating position, handles should have about 1/2" between them so they will not contact each other with the weight of the operator s hands on handles. To adjust distance, loosen locknut and turn adjusting bolt (D) in or out. Retighten nut after adjustment. After handle adjustment, check the neutral adjustment to make sure there is no creep with levers in neutral position. Readjust spring-centered lever position. (Refer to following adjustments.) Figure 1-4. A. Capscrew B. Brackets C. Neutral Gate D. Adjustment Bolt 7
Section 1. (Continued) Commercial Front-Cut Rider with Dual Eaton Model 7 Hydrostatic Neutral Exact neutral position of transmission control linkage (A, figure 1-5) can be adjusted by changing position of linkage on frame bracket (B). With control levers in neutral position, wheels should not turn in forward or reverse direction. To adjust neutral: 1. Block frame up so both drive wheels are off the ground. 2. Place weight in operator s seat to start engine. 3. With control levers in neutral gate, start engine and leave in fast throttle position. If either wheel turns in forward or reverse direction, perform steps 4 and 5. 4. Loosen capscrew (C) and nut securing transmission control linkage (A). Move linkage forward or backwards until wheel stops moving. 5. Retighten hardware, making sure wheel does not rotate after hardware is tightened. Repeat steps for opposite wheel if necessary. 6. Shut engine off and remove weight from seat. Lower rider to the ground. Spring-Centered Lever Control levers should be adjusted so that levers automatically return to neutral position when released. Before performing adjustment, make sure Control Lever Adjustment and Neutral Adjustment have been performed. 1. Block frame up so both drive wheels are off the ground. 2. Place weight in operator s seat to start engine. Do not start engine. 3. Make sure that Control Lever Adjustments and Neutral Adjustment are correct (refer to preceding adjustments). 4. Loosen spring tension completely on friction pad (refer to following adjustment). 5. Loosen nut (A, figure 1-6) on top of turnbuckle (B) and adjust turnbuckle up or down. WARNING Do not adjust turnbuckle with engine running. Hydro pump fan is too close to turnbuckle to safely perform adjustment. 6. Restart engine and check control lever position. Move control lever forward and backward and check if lever returns to neutral position and wheel does not rotate. If wheel rotates forward, turnbuckle assembly must be lengthened (turnbuckle will move down). If wheels rotate backwards, turnbuckle assembly must be shortened (turnbuckle will move up). Figure 1-5. A. Transmission Control Linkage C. Capscrew B. Frame Bracket Figure 1-6. A. Nut D. Stationary Spring B. Turnbuckle E. Friction Pad C. Tension Spring 7. Repeat turnbuckle adjustment until control lever automatically returns to neutral position. Tighten nut (A) when adjustment is correct. 8. Tighten spring tension on friction pad (refer to following adjustment). 9. Remove weight from seat and lower rider to the ground. 8
Section 1. (Continued) Commercial Front-Cut Rider with Dual Eaton Model 7 Hydrostatic Friction Pad The amount of effort required to move control levers can be adjusted by spring tension on friction pads (A, figure 1-7). Reducing spring tension will make the rider more responsive to control lever movement. Increasing spring tension will decrease responsiveness and prevent rider movement from becoming jerky, particularly near neutral range. To adjust spring tension, turn adjusting nut (B) in to increase tension or turn out to decrease tension. Figure 1-7. A. Friction Pad B. Adjusting Nut Transmission Speed Variation If one transmission is slower than the other with the same control lever travel, the bracket (A, figure 1-8) holding the transmission link (B) and friction bar (C) can be adjusted. The bracket is slotted and is adjusted by loosening the capscrews (D) and moving the bracket. Raising the bracket will increase the transmission speed. This adjustment must be made by trial and error since the machine cannot be operated while the adjustment is being made. This adjustment will not affect lever position, neutral adjustment, or spring-centered lever adjustment. Figure 1-8. A. Bracket B. Transmission Link C. Friction Bar D. Capscrews 9
Section 1. (Continued) Commercial Front-Cut Rider with Dual Eaton Model 7 Hydrostatic Wheel- & Lever-Steer Forward Travel Stop The adjustment bolt (A, figure 1-9) can be rotated to limit the maximum output speed of each hydro pump so that the rider will travel in a straight direction at full forward ground speed. For hydro output speed variation at less than full forward position, refer to Transmission Speed Variation Adjustment. For double-chain reduction models, turn the bolt all the way out. With ground speed control set to full forward position, turn the bolt in until it contacts the frame. Turn the bolt an additional 1/2 turn so that internal hydro pump components are not used as the forward travel stop. For single-chain reduction models, adjust the bolt so drive wheels are turning 130 rpm maximum. The left or right adjustment bolt can be turned inward an additional amount required to limit the output speed of a faster hydro pump if there is noticeable difference at maximum forward speed. If unit is equipped with set collar (C, figure 1-9), turning the adjustment bolt will affect the reverse travel stop. (Some early model lever-steer units did not require set collar.) Perform the Reverse Travel Stop Adjustment to reposition the set collar if forward travel stop is adjusted. Figure 1-9. A. Adjustment Bolt B. Hydro Input Linkage C. Set Collar Reverse Travel Stop The maximum reverse speed of each hydro pump is controlled by the position of a set collar (A, figure 1-10) that limits the travel of hydro input linkage (C). Adjust the forward travel stop, if necessary, before adjusting reverse travel stop. The factory pre-set position of the set collar limits the reverse speed of rider to 3.5 mph. If the set collar position is changed due to adjusting the forward travel stop or service work, set collar (A) should be repositioned so that there is 1-1/4" (double-chain reduction models) or 5/8" (single-chain drive models) between flat washer (E) and frame bracket with ground-speed control in the full reverse position. Figure 1-10. A. Set Collar D. Capscrew B. Setscrew E. Flat Washer C. Hydro Input Linkage 10
Section 2. Large-Frame Tractors with Shaft Drive - Sundstrand Model 15 Hydrostatic (Peerless 2600-002 or 2600-008) Neutral Adjustment WARNING Before performing maintenance, lower the attachment, shut off engine and remove key, disengage PTO switches and set parking brake. If the tractor creeps forward or back when ground speed control lever is in NEUTRAL, adjust as follows. 1. Remove the upper right-hand panel by removing three screws. 2. Place blocks in front of front tires. 3. Place jack under rear draw bar and raise tractor so that rear wheels are off the ground. Place jack stands under axles so tractor is secure. NOTE: Be sure jack stands do not contact tires. Figure 2-1. 4. Apply the parking brake. 5. Loosen three nuts (A, B, C). Move the ground speed control lever fully to rear, then tighten nut (C) (temporarily). 6. Release the parking brake. Put lever in neutral. 7. Start the tractor engine (hold in seat switch) and apply full throttle. Move ground speed control lever forward until wheels rotate forward. Move lever back until wheels stop turning. Shut off engine. 8. Make sure nut (A) is loose, then apply parking brake. 9. As brake is applied, the cam lever (D) will drop down. Align spacer on the nut (A) as it drops. Then tighten the nut (A) being sure no linkage moves while tightening. Loosen nut (C) and move speed control lever into neutral gate. Tighten nuts (B and C). 10. To test, release parking brake and start engine. Move lever fully forward and rearward. Wheels must stop in neutral. Stop the engine. 11. Reinstall the dash panel. Figure 2-2. A. Nut B. Nut C. Nut D. Cam Lever 11
Section 3. Large-Frame Tractors with Belt Driven - Sundstrand Model 15 Hydrostatic Neutral Adjustment If the tractor creeps forward or back when the hydrostatic control lever is in neutral, adjust as follows: CAUTION Always stop engine before leaving operator's position. Do not perform adjustment with engine running. 1. Park tractor on level ground, make sure hydrostatic control lever is firmly seated in the neutral notch of quadrant, stop engine and set parking brake. 2. Raise the seat deck and check if the pump control arm roller (E, figure 3-1) is exactly centered with the centering mark (D). If not, loosen bolt (C) and move the control cam (B) until centering mark (D) is centered on roller (E). Tighten the bolt (C). 3. Lower the seat deck, get in operator's seat, start engine and release parking brake. If tractor still creeps with hydrostatic control lever in neutral, note which direction it creeps and proceed with next steps. 4. Stop the engine, set parking brake, and raise seat deck. Loosen the jam nut (H) on end of cam pivot shaft (G). If tractor creep had been in reverse, turn adjusting nut (I) 1/8 to 1/4 turn clockwise when viewed from right side of tractor. If tractor creep had been forward, turn nut 1/8 to 1/4 turn counterclockwise. Lock jam nut, lower seat deck, get in operators seat, start engine, and release parking brake. If tractor still creeps, repeat step 4, turning nut (I) a little at a time until no creep occurs. Figure 3-1. Hydrostatic Neutral Adjustment A. Control Strap B. Control Cam Assy. F. Pump Control Arm C. Bolt G. Cam Pivot Shaft D. Centering Mark H. Jam Nut E. Pump Control Arm Roller I. Adjusting Nut 12
Section 4. Tractors with Tuff Torq K215-A & HydroGear (Sundstrand) Hydrostatic, BDU-21L Neutral Adjustment (Early Model Only) 1. Park tractor on level surface. Shut off electric clutch switch and engine. Do not apply parking brake. Make sure transmission control lever is in neutral and the hydro release valve is in the DRIVE position. 2. Raise rear of tractor off ground with a suitable hoist or floor jack. Remove the right-hand rear wheel. Install safety jackstand underneath righthand footrest and block front wheels. Lower the tractor until the left-hand tire is on the ground. 3. Loosen nut securing shift rod (A, figure 4-1) at top of speed control lever (B). 4. Loosen nut securing bottom of speed control lever (C) to support bracket. 5. Loosen nut (D) securing ball retainer (E) to support bracket. 6. Start engine and run at full throttle. 7. Rotate ball retainer (E) until drive hub rotates in a clockwise (forward) direction. Turn the ball retainer back until the drive hub stops rotating. Ball retainer can be rotated with a pliers or use a 1/4" rod or #2 Phillips screwdriver into hole in ball retainer. 8. Tighten nut (D) securing ball retainer (E). 9. Depress clutch/brake pedal fully and apply parking brake. Turn the tractor engine off. 10. Tighten both nuts securing the top and bottom of the speed control lever (B & C). 11. Release the parking brake and restart the engine. Run the engine at full throttle and check for drive hub rotation. a. Wheel hub (F) may rotate in a counterclockwise (reverse) direction due to internal relief valve. If hub can be held by hand to stop rotation, adjustment is satisfactory. If hub cannot be held by hand, loosen the nut (D) and adjust ball retainer (E) until hub rotation stops. Retighten nut (D) and recheck for hub rotation. b. If wheel hub rotates in a clockwise (forward) direction, loosen the nut (D) and adjust ball retainer (E) until hub rotation stops. Retighten nut (D) and recheck for hub rotation. 12. When adjustment is correct, stop the tractor engine and reinstall the rear wheel. Remove the tractor from the jackstands. Figure 4-1. A. Shift Rod B. Speed Control Lever (Top) C. Speed Control Lever (Bottom) D. Nut E. Ball Retainer F. Wheel Hub 13
Section 4. (Continued) Tractors with Tuff Torq K215-A & HydroGear (Sundstrand) Hydrostatic, BDU-21L Late Models - Early Models with 1686602 kit installed 1. Perform neutral adjustment as follows: a. Put tractor in Neutral. Make sure tow valve is securely in the drive (UP) position or adjustment will not be accurate. Lower the tractor so that left rear wheel is on the ground. b. Put weight in seat. Start tractor and run engine at half-throttle. Note: After installation of kit parts, hardware at locations B, C, and E, figure 4-2, must be loose before adjustments are made. c. Use 3/4" open end wrench to turn hex adjuster (A, figure 4-2). Turn until rotation of right axle stops. Tighten nut. d. Shut off engine. Apply parking brake. Tighten nut (C) at bottom of speed control lever (D) and then tighten nut (B) at top of speed control lever. e. Disengage parking brake and start tractor. Move the ground speed control lever from Forward and Reverse into the Neutral gate. f. If there is minimal rotation of right rear axle, slightly loosen nut (E, figure 4-2) on hex adjuster. Turn hex adjuster just slightly (turn counterclockwise to correct forward rotation and turn clockwise to correct reverse rotation) until axle stops. If there is more than slight rotation of rear axle, repeat steps a-d. g. Move the ground speed control lever from Forward and Reverse into the Neutral gate by depressing the brake pedal (return-to-neutral pedal). Check that the shift control lever drops into the neutral gate on dash and that there is no rear axle rotation. Note that slight rearward (counterclockwise) rotation of axle will stop within a few seconds. This small amount of rotation will not cause tractor creeping and does not require adjustment. h. When adjustment is correct, tighten adjustment nut (E) to 70-75 in. Ibs. 2. Make sure all hardware is tightened on installed kit parts. 3. Reinstall rear wheel. 4. Remove jackstands and lower tractor. 5. Start tractor and check operation of shifting linkage and return-to-neutral. Readjust neutral as required. *2518 Figure 4-2. A. Hex Adjuster B. Top Nut Location C. Bottom Nut Location D. Speed Control Lever E. Nut 14
C Section 4. (Continued) Tractors with HydroGear 216-3010L Hydrostatic Transaxle Neutral Adjustment Perform the following adjustment if the shift lever must be moved out of the neutral gate to prevent forward or reverse tractor movement. (With the clutch/brake pedal released, a small amount of travel in the shift lever may be required to fully stop tractor.) 1. Position unit on flat, level ground. Make sure the shift lever is positioned in the neutral gate. 2. Raise the rear of tractor off ther ground, and support it securley with jackstands so that the rear wheels are free to rotate. 3. Start the unit and move the shift lever until the rear wheels stop moving. Shut off tractor engine, leaving shift lever in position. E D FRONT V-Pulley Flat Idler Pulley WARNING When Making adjustment, keep hands, hair, clothing, or tools away from rotating belts. Grasp cam lever at base to keep hand several inches below belt rotating around idler pulley assembly. Careless or improper attention any result in serious injury. Viewed From Bottom Looking Up Figure 4-3 Neutral Adjustment A. Nut B. Idler Pivot Assembly C. Rear Shift Rod D. Idler Arm Assembly E. Front Shift Rod 4. Loosen nut (A, Figure 4-3) securingthe front shift rod (E) to the idler pivot assembly (B) and rear shift rod lever (C). The front shift rod must be free to move without disturbing the position of the rear shift rod (C). 5. Move the shift lever so that it is positioned in the neutral gate. 6. Tighten nut (A) securely. 7. Check operation of unit for any movement with shift lever in neutral gate. Perform the return-to -neutral adjustment (refer to next page). 15
Section 4. (Continued) Tractors with HydroGear 216-3010L Hydrostatic Transaxle Return-to-Neutral Adjustment - Hydro See figure 4-4. Perform the following adjustment if the shift lever does not return to the neutral gate from a forward gear position when the clutch/brake pedal is fully depressed. FRONT E 1. Make sure the Neutral Adjustment is correct (refer to preceding page). 2. Loosen the nut (A) that secures the rear shift rod (B) to the return-to-neutral cam (C). 3. Hold the clutch/brake pedal fully down against the right footrest. (Pedal can be clamped in this position with large C-clamp if required.) Do not apply parking brake to hold pedal, as pedal will not be held fully against footrest without free play. Contact Point E V-Pulley Flat Idler Pulley Viewed From Bottom Looking Up Figure 4-4. Return-to-Neutral Adjustment A. Nut D. Front Clutch Rod B. Rear Shift Rod E. Front Shift Rod C. Return-to-Neutral Cam F. Idler Arm Assy 4. See Figure 4-5. Position shift lever just below neutral gate - shift lever shaft should be centered on corner at start of reverse slot. 5. Rotate the return-to-neutral cam (C) securely against the front clutch rod (D). There should be no gap between the clutch rod and cam at the contact point. 6. Tighten nut (A) with pedal still held down against the footrest. 7. Remove clamp from pedal. Start tractor and check return to neutral operation. With pedal released, a small amount of travel in the shift lever may be required to fully stop tractor. Figure 4-5. Proper Shift Lever Position For Return-to-Neutral Position 16
Section 5. Tractors with Eaton 850 Transaxle Neutral Adjustment NOTE The tractor may creep a small amount forward or back-ward while in neutral gate when the parking brake is not locked. Move control lever slightly forward or back in the neutral gate to eliminate creeping. If neutral is not found in neutral gate, perform the following adjustment. 1. Raise the rear end of tractor off the ground. Support tractor with heavy-duty jackstands underneath the transaxle. 2. Securely block the front wheels to prevent any forward or reverse tractor movement. 3. Open the seat deck. Unscrew knob and remove front access panel by lifting over ground speed control lever (A, figure 5-1). 4. Loosen, but do not remove, four capscrews (B) and washers (C) securing quadrant (D). Make sure that quadrant is free to move up and down. 8. Stroke control lever to full forward position and return lever to neutral. Center the lever in the neutral gate. Tires will be rotating forward or backward. Figure 5-2. Figure 5-1. A. Speed Control Lever B. Capscrews C. Washers D. Quadrant 5. Start the tractor and move throttle halfway to full speed. Move the control lever up or down to find exact neutral (tires do not rotate). 6. Adjust the quadrant so that the control lever is centered from top to bottom in neutral gate. Refer figure 5-2. Tighten capscrews if adjustment is correct. NOTE: Only if control lever cannot be centered in neutral gate, adjustment must be made to the speed control linkage under-neath tractor (steps 7-13). Otherwise continue to step 14. 7. Move quadrant (D, figure 5-1) so that top of capscrew (B) slots align with top of washers (C). Tighten four capscrews. 9. Loosen the jam nut (A, figure 5-3) on the speed control linkage. Make sure control lever is still centered in neutral gate. 10.While holding front ball joint (C), turn hex face on adjuster shaft (B) until tires do not rotate. 11.Hold adjuster shaft (B) in place and tighten jam nut (A) up by hand. 12.Hold ball joint still and tighten jam nut (A). Adjuster shaft must not turn when tightening jam nut. 13.Recheck control lever in neutral gate. If lever is not centered, loosen capscrews and adjust quadrant up or down to center lever in neutral gate. Retighten capscrews. 14.Turn tractor off. Replace front access panel, replace knob, and close seat deck. Remove jackstands. Figure 5-3. A. Jamnut B. Adjuster Shaft C. Front Ball Joint 17
Section 6. Tractors with Tuff Torq K60 Hydrostatic Transaxle Neutral Adjustment Note: Perform this adjustment procedure only if tractor moves forward or reverse when ground speed control lever is in neutral gate. 1. Place jackstand under each side of rear drawbar. Adjust jackstand height until rear wheels are off the ground. 2. Hydro transmission has pre-set internal neutral adjustment. If tractor creeps when control lever is in neutral, first loosen nut (A, figure 6-1) securing shift rod lever (B) to shift pivot assembly (C). Directional cam (E) will return to factory pre-set neutral. If wheels continue to move with control lever in neutral, a problem exists with internal adjustment. Contact the Service Department. If wheels do not move, perform the following steps to align cams. 3. Loosen nut (D) securing lever assembly pivot. 4. With nut (A) loosened, make sure ground speed control lever is in neutral slot on dash. 5. Push spring-loaded directional cam (E) side-to-side and allow cam to return-to-neutral. 6. With cam (E) stationary, move shift pivot assembly (C) until 1/4" hole in cam and pivot assembly line up. Insert 1/4" positioning pin (F) or 1/4" rod thru both parts. Cam (E) must remain in neutral position. 7. With positioning pin in place, tighten nut (D) and then tighten nut (A). 8. Remove positioning pin and move ground speed control lever through forward and reverse ranges and return lever to neutral. 9. Check to see if positioning pin can be freely inserted (from bottom side) through directional cam (E) and lever assembly (C). If alignment if good, go to step 10. If pin cannot be inserted, repeat steps 2-8. 10. With ground speed control lever in neutral position, start tractor (with rear wheels off the ground) and check for wheel movement. Wheels should not move due to internal neutral adjustment. If wheels move, recheck that positioning pin can be inserted freely through directional cam (E) and lever assembly (C) with ground speed control lever in neutral position. If neutral cannot be found, a problem exists with the tractor shift linkages. 11. After neutral adjustment, move the ground speed control lever to forward range and depress clutch/ brake pedal. The control lever should return to the neutral position in dash and wheels should not move. Move ground speed control lever to reverse range and repeat check. Figure 6-1. Neutral Adjustment A. Nut, 1/4 B. Shift Rod Lever C. Shift Pivot Assembly D. Nut, 5/16 E. Cam F. Positioning Pin 18
Section 6. (Continued) Tractors with HydroGear 311-0750/311-0800 Transaxle Neutral Adjustment Perform the following adjustment if the shift lever must be moved out of the neutral gate to prevent forward or reverse tractor movement. With the clutch/brake pedal released, a small amount of travel in the shift lever may be required to fully stop tractor. 1. Position rider on flat level ground. Make sure the ground speed control lever is securely in the neutral gate. 2. Raise the rear of tractor off ground and support securely with jackstands. 3. Loosen nut (A, figure 6-2) securing the front shift rod to the idler pivot assembly (B). The carriage bolt must be free to move in the shift rod slot. WARNING When making adjustment, keep hands, hair, clothing, or tools away from rotating belts. Grasp cam lever at base to keep hand several inches below belt rotating around idler pulley assembly. Careless or improper attention may result in serious injury. 4. Start the tractor and rotate the hydro cam lever (C) until rear wheels stop moving. Shut off tractor engine. 5. Tighten nut (A) securely. 6. Check operation of tractor for any movement with shift lever in neutral gate. Perform the return-to-neutral adjustment (refer to following paragraph). Figure 6-2. Neutral Adjustment A. Nut C. Hydro Cam Lever B. Idler Pivot Assembly 19
Section 6. (Continued) Tractors with HydroGear 311-0750/311-0800 Transaxle Return-to-Neutral Adjustment Perform the following adjustment if the shift lever does not return to the neutral gate when the clutch/ brake pedal is fully depressed. 1. Make sure the Neutral Adjustment is correct (refer to preceding paragraph). 2. Loosen the nut (A, figure 6-3) that secures the rear shift rod (B) to the return-to-neutral cam (C). 3. Hold the clutch/brake pedal fully down against the right footrest. Pedal can be clamped in this position with large C-clamp if required. Do not apply parking brake as pedal will not be held against footrest without free play. 4. Rotate the return-to-neutral cam (C) securely against the front clutch rod (D). There should be no gap between the clutch rod and cam. 5. Tighten nut (A) with pedal held down against footrest. 6. Start tractor and check return-to-neutral operation. With pedal released, a small amount of travel in the shift lever may be required to fully stop tractor. Figure 6-3. Return-to-Neutral Adjustment A. Nut C. Return-to-Neutral Cam B. Rear Shift Rod D. Front Clutch Rod 20
Section 6. (Continued) Lawn Tractors with Eaton 750 or 751 Transaxles Locate Assembly Number (750 or 751) and refer to the following three pages before adjusting. Early Model 750 with Welded Support Bracket... 21 Later Model 750 with Plastic Support Bracket... 22 Model 751... 23 21
Section 6. (Continued) Lawn Tractors with Eaton 750 Hydrostatic Transaxle Check Preceding Page to Locate Assembly Number. NOTE: Perform the Clutch/Brake Adjustment before doing the Neutral Adjustment. Neutral Adjustment Early Models with Welded Support Bracket (H, Figure 6-4) 1. Park tractor on level surface. Shut off PTO switch and engine. Do not apply parking brake. Make sure transmission control lever is in neutral and has activated neutral switch light (ignition switch on) 2. Raise rear of tractor off ground with a suitable hoist or floor jack. Install jackstands underneath transaxle and block front wheels. 3. Loosen nut (A, figure 6-4) securing transaxle shift rod to speed control lever (B). 4. Loosen nut (C) securing ball retainer (G) to welded support bracket (H). 5. Rotate shift cam (D) so that neutral detent is aligned with roller ball (E). 6. Start engine and increase to full throttle. If wheels rotate, continue with adjustment. If wheels do not rotate go to step 8. 7. Place a 1/4" rod or #2 Phillips screwdriver into hole (F) in eccentric ball retainer (G). Rotate ball retainer until wheels stop moving. 8. Tighten nut (C) securing ball retainer (G). 9. Make sure dash transmission control lever is in neutral position and has activated neutral switch light (ignition switch) before tightening nut (A). 10. Check the "Return-To-Neutral" by following these steps: a. Shift transmission lever into forward (drive) position and fully depress clutch/brake pedal. b. Lever should return to neutral slot. c. If lever does not return to neutral, repeat above steps 1-9. 11. Shut off engine and remove tractor from jackstands. Figure 6-4. A. Nut B. Speed Control Lever C. Nut D. Shift Cam E. Roller Ball F. Adjustment Hole G. Eccentric Ball Retainer H. Support Bracket (Welded) For later models with plastic bracket see page 22. 22
Section 6. (Continued) Lawn Tractors with Eaton 750 Hydrostatic Transaxle Neutral Adjustment Later Models with Plastic Bracket (H, Figure 6-5) 1. Park tractor on level surface. Shut off PTO switch and engine. Do not apply parking brake. Make sure transmission control lever is in neutral and has activated neutral switch light (ignition switch on). 2. Raise rear of tractor off ground with a suitable hoist or floor jack. Install jackstands underneath transaxle and block front wheels. 3. Loosen nuts (A, figure 6-5) on both left side and right side of speed control lever (B). (Left side nut is located next to spring and not shown in illustration.) 4. Loosen nut (C) securing ball retainer (G) to plastic support bracket (H). 5. Rotate shift cam (D) so that neutral detent is aligned with roller ball (E). 6. Start engine and increase to full throttle. If wheels rotate, continue with adjustment. If wheels do not rotate, go to step 8. 7. Place a 1/4- rod or #2 Phillips screwdriver into hole (F) in eccentric ball retainer (G). Rotate ball retainer until wheels stop moving. 8. Tighten nut (C) securing ball retainer (G). 9. Shut off engine and make sure dash transmission control lever is in neutral position, and has activated neutral light (Ignition switch on). 10. Pull right end of speed control lever (B) fully forward. Tighten the left side 1/4" nut (not shown). 11. Push the right end of speed control lever (B) fully rearward and tighten right side 5/16" nut (A). 12. Check the "Return-To-Neutral" by following these steps: a. Shift transmission lever into forward (drive) position and fully depress clutch/brake pedal. b. Lever should return to neutral slot. c. If lever does not return to neutral, repeat above steps 1-11. 13. Remove tractor from jackstands. Figure 6-5. A. Nut B. Speed Control Lever C. Nut D. Shift Cam E. Roller Ball F. Adjustment Hole G. Eccentric Ball Retainer H. Support Bracket (Plastic) For early models with welded support bracket see page 21. 23
Section 6. (Continued) Lawn Tractors with Eaton 751 Hydrostatic Transaxle Neutral Adjustment 1. Park tractor on level surface. Shut off PTO switch and engine and remove key. Do not apply parking brake. Make sure transmission control lever is in neutral. 2. Raise rear of tractor off ground with a suitable hoist or floor jack. Install jackstands underneath transaxle and block front wheels. 3. Loosen nuts (A, figure 6-6) on both left side and right side of speed control lever (B). (Left side nut is located next to spring and not shown in illustration.) 4. Rotate shift cam (D) so that neutral detent is aligned with roller ball (E). 5. Start engine and increase to full throttle. If wheels rotate, continue with adjustment. If wheels do not rotate, go to step 9. 6. Loosen nut (C) securing ball retainer (G) to plastic support bracket (H). 7. Place a 1/4" rod or #2 Phillips screwdriver into hole (F) in eccentric ball retainer (G). Rotate ball retainer downward (from RH side) until wheels rotate forward. Rotate ball retainer slowly upward from RH side) until wheels stop moving. (Neutral must be obtained coming from forward.) 8. Tighten nut (C) securing ball retainer (G). 9. Shut off engine and make sure dash transmission control lever is in neutral position against rear edge of neutral slot in dash. 10. Pull right end of speed control lever (B) fully forward. Tighten the left side 1/4" nut (not shown). 11. Push the right end of speed control lever (B) fully rearward and tighten right side 5/16" nut (A). 12. Start the engine and run at full throttle. Check for neutral by moving control lever into forward and reverse and back into neutral gate. Control lever can be moved a small amount forward or backward in neutral gate to avoid tractor movement. Continue with adjustment if neutral cannot be obtained. 13. Shut off engine. Loosen 1/4" nut at LH end of speed control lever. Pull speed control lever toward right with transmission control lever against rear edge of neutral slot in dash. Retighten 1/4" nut. 14. Repeat step 12. 15. Shut off engine. Loosen 1/4" nut at LH end of speed control lever. Position transmission control lever out of neutral slot toward reverse to the point where notched out portion of lever is even with rear edge of neutral slot. Pull speed control lever toward right. Retighten 1/4" nut. 16. Repeat step 12. 17. Return-To-Neutral Adjustment is correct when the above adjustment steps are followed. 18. Remove the tractor from jackstands. Figure 6-6. Neutral Adjustment A. Nut B. Speed Control Lever C. Nut D. Shift Cam E. Roller Ball F. Adjustment Hole G. Eccentric Ball Retainer H. Support Bracket 24
Section 7. Lawn Tractors with HydroGear (Formerly Agri-Fab) Sundstrand BDU10S Transaxle Neutral Adjustment - (Linkage with two ball joints) If the tractor creeps forward or back with transmission in neutral notch, adjust as follows. 1. Seat yourself in the operator s seat and start the engine. 2. Move the lever to position where tractor remains stationary. This is neutral position. 3. Stop the engine. 4. Disconnect the battery cables to avoid causing short circuit or sparks with tools. 5. The control lever quadrant (A, figure 7-1) is mounted with slotted holes so it can be adjusted. Loosen the two self-tapping screws (C) and move the quadrant so the lever is centered in the quadrant gate. Then tighten the two screws. 6. Connect the battery cables. 7. Lower the seat deck. Start the engine to check again. If the tractor still creeps in neutral, proceed to step 8. 8. Return the quadrant to the center position, if moved. Loosen the front nut (A, figure 7-2) and rear nut (B) on the hydro shift rod (C). The rear nut is a left-hand thread. 9. Using an open-end wrench, turn the hex shaft (D) three turns upwards (toward the frame) if the tractor Is creeping forward, or downward (toward the ground) if the tractor is creeping backwards. 10. Hold hex shaft and tighten front and rear nuts (A & B, figure 7-2). 11. Repeat steps 1 through 7 to read just the hydro lever in the neutral gate. 12. Repeat entire procedure until tractor does not creep with hydro lever in neutral gate. Figure 7-1. Control Lever Quadrant A. Quadrant B. Transmission Engagement Lever C. Taptite Screw *2223 Figure 7-2. A. Front Jam Nut B. Rear Jam Nut C. Hydro Shift Rod D. Hex Shaft 25
Section 7. (Continued) Lawn Tractors with HydroGear (Formerly Agri-Fab) Sundstrand BDU10S Transaxle Neutral Adjustment - (Linkage with one ball joint) If the tractor creeps forward or back with transmission in neutral notch, adjust as follows: 1. Raise rear of tractor off ground with suitable hoist or floor jack. Install jackstands underneath transaxle and block front wheels. 2. Raise the seat deck. The control lever quadrant (A. Figure 7-3. ) is mounted with slotted holes so it can be adjusted. Loosen the two self-tapping screws (C) and move the quadrant so the screws are centered in the quadrant slots. Then tighten the two screws. 3. Place speed control lever in neutral position. Start engine and run at maximum RPM. 4. Loosen jam nut (B, figure 7-4) and adjust control link length by rotating nut (A, figure 7-4) in either direction until wheels stop rotating. Snug jam nut (B) finger-tight. 5. Check for neutral from forward and reverse with speed control lever. Repeat steps 3 and 4 if needed. 6. Hold the adjustment nut (A) and tighten outer jam nut (B) securely. 7. Remove unit from jackstands or jack. *303 Figure 7-3. Control Lever Quadrant A. Quadrant B. Transmission Engagement Lever C. Taptite Screw *2231 Figure 7-4. Hydro Control Linkage A. Adjustment Nut B. Jam Nut 26
Section 7. (Continued) Lawn Tractors with HydroGear 310-0500 Transaxle (With Hand Control) WARNING To avoid serious injury, perform adjustments only with engine stopped, key removed and tractor on level ground. *2538 Neutral Adjustment If the tractor creeps forward or backward with ground control speed lever positioned in the neutral gate, perform the following adjustment. 1. Raise rear of tractor off ground with suitable hoist or floor jack. Install jackstands underneath transaxle and block the front wheels. 2. See figure 7-5. Place speed control lever (A) in the NEUTRAL gate. Start the engine and run at maximum RPM. 3. Raise the seat deck. Loosen nut (B) and adjust linkage rod (C) up or down until wheels stop rotating, then tighten nut (B) securely. 4. Turn off the engine and remove tractor from jack stands or jack. Figure 7-5. Neutral Adjustment A. Ground Speed Control Lever B. Nut C. Linkage Rod *2537 Return-to-Neutral Adjustment 1. See figure 7-6. Depress clutch/brake pedal fully. Ground speed control lever should return to the neutral gate. 2. Turn nut (A, figure 7-6) in either direction until proper adjustment is achieved and control lever returns fully to the neutral gate. Note: Return to neutral functions from any forward setting only. Figure 7-6. Return-to-Neutral Adjustment - (Viewed from Right Side of Transaxle with the Rear Wheel Removed) A. Nut 27
Section 7. (Continued) Lawn Tractors with HydroGear 318-0500/322-0500/322-0650 Transaxle (With Foot Control) WARNING When making adjustment, keep hands, hair, clothing, and tools away from rotating belts. Grasp cam lever at base to keep hand several inches below belt rotating around idler pulley assembly. Careless or improper attention may result in serious injury. If the tractor creeps forward or backward with the engine running and both travel pedals released, perform the following adjustment: NOTE: For Hydro-Gear 0500 transmission part number 1713761 see Figure 7-7. For the Hydro-Gear 0650 transmission part number 1715765 see Figure 7 8. An identification decal is attached to the transmission case. 1. Block the front wheels and raise the rear of the tractor off the ground with a suitable hoist or floor jack. Install jackstands underneath the transaxle. 2. Start the engine and release the parking brake while keeping seat switch depressed. 3. Loosen the nut (A) securing the neutral adjustment rod (B). Move the rod until neutral is found, then retighten the nut. NOTE: The stop pin (D, Figure 7-7 and 7-8) should be positioned near the end of the cam slot when the front pedal edge is 1/4" above the frame (pedal fully depressed). If it is not, proceed to the Forward Speed Adjustment procedure. The stop pin should not bottom out in the cam slot. Increasing the distance between the end of the cam slot and the stop pin will increase reverse speed and decrease forward speed. Viewed from right side of tractor with rear wheel removed and foot pedal fully depressed. A B Gap Figure 7-7 Neutral Adjustment - Hydro-Gear 0500, Part Number 1713761 A. Nut C. Cam Slot B. Neutral Adjustment Rod D. Stop Pin Viewed from right side of tractor with rear wheel removed and foot pedal fully depressed. B A Figure 7-8. Neutral Adjustment - Hydro-Gear 0650 Part Number 1715765. (Linkage removed for clarity) A. Nut C. Cam Slot B. Neutral Adjustment Rod D. Stop Pin C C D Gap D 28
Section 7. (Continued) Lawn Tractors with HydroGear 318-0500/322-0500/322-0650 Transaxle (With Foot Control) If the unit does not reach top speed with the forward direction pedal fully depressed, perform the following adjustment with the engine off and PTO disengaged. 1. See Figure 7-9. Loosen the nut (A) securing the control rod to the hydro control lever. 2. Position the pedal so the distance between the frame and bottom edge of the pedal is 1-3/4" as shown in Figure 7-10. 3. With pedal in this position, tighten the nut (A, Figure 7-9). 4. The stop pin (D, Figure 7-7 and 7-8 previous page) should be positioned at the end of the cam slot as shown when the front pedal edge is 1/4" above the frame (pedal fully depressed). If it is not, loosen nut (A, Figure 7-9) and adjust pedal as necessary, then retighten nut. NOTE: The stop pin (D, Figure 7-7 and 7-8) should be positioned near the end of the cam slot when the front pedal edge is 1/4" above the frame (pedal fully depressed). The stop pin should not bottom out in the cam slot. Increasing the distance between the end of the cam slot and the stop pin will increase reverse speed and decrease forward speed. Unit pictured from above with frame removed. A Figure 7-9 Forward Speed Adjustment Linkage - Hydro Models A. Nut B. Control Rod B 1 3/4" Figure 7-10 Forward Speed Adjustment - Hydro 29
Section 8. Lawn Tractors with Eaton Model 7 Hydrostatic & Peerless 1300 Series Transaxle Neutral Adjustment If the tractor creeps forward or back with transmission in neutral notch, adjust as follows. 1. Seat yourself in the operator s seat and start the engine. 2. Move the lever to position where tractor remains stationary. This is neutral position. 3. Stop the engine. 4. Disconnect the battery cables to avoid causing short circuit or sparks with tools. 5. Raise the seatdeck. The control lever quadrant (figure 8-1) is mounted with slotted holes so it can be adjusted. Loosen the two self-tapping screws and move the quadrant so the lever moves to the correct position. Then tighten the two screws. 4. Connect the battery cables. 5. Lower the seat deck. Start the engine to check again. If the tractor still creeps in neutral, repeat the procedure to adjust. *303 Figure 8-1. Control Lever Quadrant A. Quadrant B. Transmission Engagement Lever C. Capscrews Transmission Control Lever If lever operates too hard or loose, it can be adjusted. Loosen or tighten the nut (B, figure 8-2) to loosen or tighten the lever. Some models are equipped with setscrews (D) which must be loosened to adjust the nut. Transmission Engagement Lever If transmission engagement lever (under seat) does not work properly, check the adjustment as follows. 1. Release the parking brake. 2. Place the transmission control lever in NEUTRAL. 3. Place the transmission engagement lever (B, figure 8-1) in forward position (disengage position). 4. Locate the plunger (A, figure 8-2) on front of the transmission which is operated by the lever. Check the clearance between the plunger and the fitting as shown in the detail in figure 8-2. It should be 0.060 inch to 0.125 inch. 5. To adjust, loosen the screws (C, figure 8-1) which secure the engagement lever support bracket (C, figure 8-2) and move bracket to achieve the 0.060 to 0.125 inch dimension, then tighten the screws. Figure 8-2. Engagement Lever A. Plunger C. Support Bracket B. Nut D. Setscrews 30
Section 9. Later Model Front-Cut Rider with Eaton Model 7 Hydrostatic Neutral Adjustment *1948 WARNING Keep away from moving parts when engine is running. 1. Adjustment can be performed with mower installed. 2. Loosen nuts (B, figure 9-1) on either side of guide (C). Leave 1/4" clearance on each side. Figure 9-1. Hydro Control Rod A. Hydro Control Rod B. Nuts C. Guide 3. Loosen the two capscrews (A. figure 9-2). 4. Raise front tires off the ground by placing jack stands under each side of frame. Do not support rider at axle as axle will rotate during adjustment. 5. Start the engine and raise the seat deck. For an accurate neutral adjustment, keep engine RPM level high during adjustment. 6. Loosen the jam nut (B). Turn the inner nut (D) either left or right until the output pulley (C) stops turning. 7. Tighten the two capscrews (A). 8. Tighten the jam nut (B) against inner nut (D). 9. Shut off the engine. 10. Make sure transmission control lever is in neutral. 11. Tighten the two nuts (B, figure 9-1) against the guide. Make sure rod guide does not move when tightening nuts. 12. The rider can be taken off the jackstands. Figure 9-2. Neutral Adjustment A. Capscrews B. Jam Nut C. Pulley D. Adjustment Nut 31
Section 10. Early Model Front-Cut Rider with Eaton Model 7 Hydrostatic Neutral Adjustment WARNING Keep away from moving parts when engine is running. 1. Remove the mower from the rider. 2. Loosen nuts (B, figure 10-1) on either side of guide (C). Leave 1/4" clearance on each side. Figure 10-1. Hydro Control Rod A. Hydro Control Rod E. Spring, Clutch B. Nuts F. Nut, Clutch Rod C. Guide G. Nut, Brake Rod D. Bracket H. Brake Rod 3. Loosen the two capscrews (A, figure 10-2). 4. Raise front tires off the ground by placing jackstands under each side of frame. 5. Start the engine and raise the seat deck. For an accurate neutral adjustment, keep engine RPM level high during adjustment. 6. Loosen the jam nut (B). Turn the inner nut (D) either left or right until the output pulley (C) stops turning. 7. Tighten the two capscrews (A). 8. Tighten the jam nut (B) against inner nut (D). 9. Shut off the engine. 10. Make sure transmission control lever is in neutral. 11. Tighten the two nuts (B, figure 10-1) against the guide. 12. The rider can be taken off the jackstands. *1945 Figure 10-2. Neutral Adjustment A. Capscrews B. Jam Nut C. Pulley D. Adjustment Nut 32