Media Number -SENR Publication Date -01/07/1992 Date Updated -11/10/2001

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1 518 GRAPPLE SKIDDER--SERIES II 95U03200-UP (MACHINE) POWERED BY 330 Page 1 of 16 Model: 518 WHEEL SKIDDER 95U Configuration: 518 GRAPPLE SKIDDER--SERIES II 95U03200-UP (MACHINE) POWERED BY 3304 ENGINE Testing and Adjusting 518 SKIDDER WINCH Media Number -SENR Publication Date -01/07/1992 Date Updated -11/10/2001 Testing And Adjusting Introduction When an analysis of winch performance is made, be sure that the operation of the components that follow is correct. The skidder engine: kw (horsepower) and engine rpm. The skidder torque converter oil pressures and leakage. NOTE: The output of the transmission oil pump: See 518 Skidder Power Train Specifications, SENR2313. The winch hydraulic control valve: no damage to lever assembly or hoses. Pressure Checks To prevent personal injury while checking pressures, the wire rope cable must be disconnected and removed from the drum. 6V4161 Pressure Gauge Kit

2 518 GRAPPLE SKIDDER--SERIES II 95U03200-UP (MACHINE) POWERED BY 330 Page 2 of 16 Hydraulic oil under pressure can remain in the hydraulic system on this machine after the engine and pump have been stopped. Serious injury can be caused if this pressure is not released before any service is started on the hydraulic system. To prevent possible injury, refer to section, Release Of Pressure In The Hydraulic System, before any fitting, hose or component is loosened, tightened, removed, or adjusted. Always move the machine to a location away from the travel of other machines. Be sure that other personnel are not near the machine when the engine is running and tests or adjustments are being made. NOTE: The 518 Skidder Winch does not have hydraulic pressure taps. To make pressure checks, the winch hydraulic lines must be disconnected at the winch case and tee fittings installed. Install a 0 to 4150 kpa (0 to 600 psi) pressure gauge to the tee fittings at (A), (B), (C), and (D). NOTE: All tests and adjustments must be made with the oil in the hydraulic control system at normal temperature of operation. Install 0 to 4150 kpa (0 to 600 psi) pressure gauges at locations (A), (B), (C), and (D). Winch Hydraulic Lines (Earlier) (A) Input clutch. (B) Brake off. (C) Freespool.

3 518 GRAPPLE SKIDDER--SERIES II 95U03200-UP (MACHINE) POWERED BY 330 Page 3 of 16 Winch Hydraulic Lines (Later) (A) Input clutch. (B) Brake off. (C) Freespool. (D) Freespool with hydraulic drag brake. NOTE: All pressure readings to be taken with transmission in neutral. If pressure readings are taken while the transmission is in gear, the readings will be higher than normal.

4 518 GRAPPLE SKIDDER--SERIES II 95U03200-UP (MACHINE) POWERED BY 330 Page 4 of 16 Priority Valve (Earlier Version) (1) Spacer. (2) Valve.

5 518 GRAPPLE SKIDDER--SERIES II 95U03200-UP (MACHINE) POWERED BY 330 Page 5 of 16 Priority Valve (Later Version) (1) Spacer. (2) Valve. (3) Ball. (4) Cover. (5) Bolts. (6) Spring.

6 518 GRAPPLE SKIDDER--SERIES II 95U03200-UP (MACHINE) POWERED BY 330 Page 6 of 16 Spacer Chart Release Of Pressure In The Hydraulic System Make reference to WARNING on first page of Pressure Checks section. To prevent possible injury, do the procedure that follows before testing and adjusting the hydraulic system. 1. Move the machine to a smooth horizontal location. Move away from working machines and personnel. 2. Permit only one operator on the machine. Keep all other personnel either away from the machine or in view of the operator. 3. Engage the parking brake. Move the winch control lever to the BRAKE ON position, and stop the engine. 4. Move the winch control lever back and forth several times through all of the positions, stopping momentarily at each position. 5. The pressure in the winch should now be released and lines or components can be removed.

7 518 GRAPPLE SKIDDER--SERIES II 95U03200-UP (MACHINE) POWERED BY 330 Page 7 of 16 Freespool Hydraulic Drag Brake Switch Adjustment: (Earlier) Winch Control Lever (1) Winch lever control. Surface "A". 1. Place winch lever control (1) in the FREESPOOL with hydraulic drag brake position, against surface "A". 2. Adjust switch assembly (2) to provide dimension "B" 2.5 ± 1.0 mm (.10 ±.04 in) additional plunger travel, when lever assembly (1) is against surface "A".

8 518 GRAPPLE SKIDDER--SERIES II 95U03200-UP (MACHINE) POWERED BY 330 Page 8 of 16 Winch Control Lever (Earlier Version) (1) Winch lever control. (2) Drum drag brake switch. Dimension "B".

9 518 GRAPPLE SKIDDER--SERIES II 95U03200-UP (MACHINE) POWERED BY 330 Page 9 of 16 Mounting & Control Group Lever Assembly Adjustment: (Later) (A) Reel-in. (B) Brake on. (C) Brake off. (D) Freespool - drag on. (E) Freespool - drag off. Dimensions required to adjust position of lever assembly. (F) = 64.0 mm (2.52 in). (G) = 50.0 ± 1.0 mm (2.000 ±.040 in). Large arrow indicates front of machine.

10 518 GRAPPLE SKIDDER--SERIES II 95U03200-UP (MACHINE) POWERED BY 3 Page 10 of 16 Winch Control Lever (Later Version) View A-A (1) Winch control lever. (3) 2V8282 Spring. Use the necessary number of springs required so that control lever (1) returns to the BRAKE ON position when it is released in the REEL-IN position, and remains in the FREESPOOL - drag off position when released in the FREESPOOL - drag off position.

11 518 GRAPPLE SKIDDER--SERIES II 95U03200-UP (MACHINE) POWERED BY 3 Page 11 of 16 Operational Checks (Mechanical) Input And Brake Clutch Groups (Earlier Version Shown) (1) Brake clutch discs and plates. (2) Seal assembly. (3) O-ring seals. (4) Viscous drag brake disc. (5) One-way clutch. (6) Input clutch discs and plates. (7) O-ring seals.

12 518 GRAPPLE SKIDDER--SERIES II 95U03200-UP (MACHINE) POWERED BY 3 Page 12 of 16 Input And Brake Clutch Groups (Later Version Shown) (1) Brake clutch discs and plates. (2) Seal assembly. (3) O-ring seals. (4) Viscous drag brake disc. (5) One-way clutch. (6) Input clutch discs and plates. (7) O-ring seals. Problem 1: Winch drum does not reel-in. 1. Low pressure of the control system. See Pressure Checks. 2. Input clutch discs and plates (6) are worn. 3. Low pressure to the input clutch (but not zero) due to failure of seal assembly (2) or O-ring seals (3) or (7). 4. Failure of transmission hydraulic pump or hydraulic lines. 5. Failure of power takeoff shaft or shaft coupling. 6. Mechanical failure of transfer gears from input clutch. 7. Mechanical failure of bevel gear or pinion. 8. Mechanical failure of one or more drum drive gears.

13 518 GRAPPLE SKIDDER--SERIES II 95U03200-UP (MACHINE) POWERED BY 3 Page 13 of 16 Problem 2: Winch drum reels in slowly with "BRAKE ON". 1. Viscous drag brake disc (4) worn out. 2. Weak or broken springs in drag brake. Problem 3: Winch drum will not turn with "BRAKE OFF". 1. Low pressure of the control system. See Pressure Checks. 2. Discs and plates (1) of the brake clutch have been too hot and are bent. 3. Hydraulic control valve is not working correctly. See Pressure Checks. 4. Failure of the transmission hydraulic pump or hydraulic lines. Drum And Shaft Assembly (Earlier Version Shown)

14 518 GRAPPLE SKIDDER--SERIES II 95U03200-UP (MACHINE) POWERED BY 3 Page 14 of 16 (8) O-ring seal. (9) Lip-type seal. (10) Lip-type seal. (11) O-ring seal. (12) Freespool drag brake. (13) Shaft and fork assembly. (14) Piston. Drum And Shaft Assembly (Later Version Shown) (8) O-ring seal. (9) Lip-type seal. (10) Lip-type seal. (11) O-ring seal. (12) Freespool drag brake. (13) Shaft and fork assembly. (14) Piston. Problem 4: The torque converter stalls. 1. Discs and plates of input clutch (6) have been too hot and are bent so that input clutch will not release. 2. One-way clutch (5) is damaged. 3. Gear train is damaged.

15 518 GRAPPLE SKIDDER--SERIES II 95U03200-UP (MACHINE) POWERED BY 3 Page 15 of 16 Problem 5: Bevel gear shows poor tooth contact. 1. Incorrect alignment of gear and pinion. 2. Incorrect gear tooth clearance (backlash) between the bevel pinion gear and the bevel gear. Problem 6: Oil leak between drum and winch case. 1. Leakage past lip seals (9) or (10). 2. Leakage past O-ring seals (8) or (11). Problem 7: Winch drum line pull is excessive with a continuous pull in "BRAKE OFF". 1. Freespool drag brake (12) set too tight. 2. Drum bearing adjustment incorrect. 3. Freespool hydraulic drag brake is activated. 4. The discs and plates of the brake have been too hot and are bent so that the brake will not release. 5. Low pressure of the control system. See Pressure Checks. 6. Bad seals on the brake pistons. 7. Low oil level in the drum. Problem 8: Winch drum will not rotate easily in "FREESPOOL with spring drag brake". 1. Freespool drag brake (12) set too tight. 2. Drum bearing adjustment incorrect. 3. Freespool hydraulic drag brake is activated. 4. Low pressure of the control system. See Pressure Checks. 5. Bad seals on piston (14). 6. Bent shaft and fork assembly (13). 7. Low oil level in drum. Problem 9: Winch drum rotates too easily in "FREESPOOL with hydraulic drag brake".

16 518 GRAPPLE SKIDDER--SERIES II 95U03200-UP (MACHINE) POWERED BY 3 Page 16 of Freespool drag brake switch not adjusted correctly. 2. Low pressure of the control system. See Pressure Checks. 3. Solenoid valve is not operating correctly.