Page 1 of 31 Pages Harlan Drive Axle Series 1 Inner Wheel Bearing Inspection February 19, 2008
Page 2 of 31 Pages Phone Numbers Harlan Global Manufacturing 27 Stanley Road Kansas City, KS 66115 USA...800 255-4262 Canada...800 767-4275 Direct...913 342-5650 Fax...913 321-5802 Department Extensions Sales...217 Warranty...258 Non-Warranty Technical Support...283 Parts and Service Manual Feedback...264 e-mail: General:...info@harlan-corp.com Warranty:...warranty@harlan-corp.com Sales:...sales@harlan-corp.com Internet Home Page... www.harlan-corp.com s... www.harlan-corp.com/tech_bulletin.asp
Table of Contents Page 3 of 31 Pages PRELIMINARY INFORMATION...4 APPLICABILITY...4 SECTION A. INSPECTION...5 1. INSPECT THE REAR BRAKE PADS....5 2. INSPECTING THE REAR BEARINGS...6 SECTION B, REPLACING WHEEL BEARINGS...9 1. REMOVING THE INNER WHEEL BEARINGS...9 2. INSTALLING INNER BEARING RACE...10 3. INSTALLING INNER TAPERED BEARING...12 4. INSTALLING THE ROTOR OIL SEAL...14 5. INSTALLING THE AXLE ARM OIL SEAL...16 6. INSTALLING THE HUBS ON THE AXLE...17 7. INSTALLING THE OUTER BEARINGS...18 8. INSTALLING THE OUTER GREASE SEAL...20 9. INSTALLING THE BEARING NUTS AND WASHERS...22 10. INSTALLING THE AXLE SHAFTS...26 11. COMPLETING THE JOB...29
Preliminary Information Page 4 of 31 Pages Applicability This bulletin applies to all Harlan Standard and Low profile tractors with Series 1 drive axles built between November, 2007 and February 12, 2008. Figure 1, Drive Axle
Section A. Page 5 of 31 Pages Inspection c. c. Figure 2, Brake Pad Inspection 1. Inspect the rear brake pads. a. Jack up the back of the tractor and put safety jack stands under the rear plate. b. Remove the rear wheels and tires. c. Inspect the rear brake pads for signs if asymmetric wear. d. If the inner and outer pads are the same thickness, this job is complete. Return the tractor to service. If they are not wearing evenly, call Harlan Global Manufacturing Warrantee Service and report this condition. You will receive parts required to continue. When the parts are available, continue to Step 2.
Page 6 of 31 Pages 2. Inspecting the Rear Bearings Figure 3, Axle Hub Exploded View Reference Number Description Quantity per axle Part Number 1 Bolt, Hex 28 Ea 02025-0073 2 Lock Washer, 7/16 Spring Zinc 28 Ea 02011-23E7 3 Dowel 4 Ea 02025-0054 4 Axle Shaft, Heavy Duty 2 Ea 02025-0120 5 Nut, Hub Inner/Outer 4 Ea 02025-0051 6 Lock Washer 2 Ea 02025-0052 7 Seal, Oil (Outer) 2 Ea 02025-0050 8 Gasket, Drive Axle Hub 2 Ea 02025-0049 9 Bearing Set, Diff. & Outer Hub 2 Ea 02025-0443
Page 7 of 31 Pages Complete these steps on each side of the axle: a. Remove the 14 hex bolts (1), lock washers (2) and 2 dowels (3). Note which holes use the dowels. b. Remove the axle shaft (4) and gasket. Discard the gasket. c. Flatten the tabs on the large lock washer (6) and remove the two hub nuts (5). d. Remove outer oil seal (7). Discard the seal. Figure 4, Improvised Bearing Puller e. Step f requires a pair of hooks as shown above. You can make them by bending cotter pins as shown.
Page 8 of 31 Pages Figure 5, Removing the Outer Bearing f. Remove the outer wheel bearing cup and cone set. Clean the grease from the outer wheel bearings and the inside of the hub. Figure 6, Correct and Incorrect Bearing Installation Correct Incorrect g. Inspect the inner wheel bearing. Note the difference between the correct and the incorrect installation. h. If the bearing are installed correctly, troubleshoot the rear brake system for the uneven wear before returning the tractor to service. If the bearing is installed incorrectly, call Harlan Global Manufacturing Warrantee Service and report this condition. You will receive parts required to continue. When the parts are available, continue to Section B.
Page 9 of 31 Pages Section B, Replacing Wheel Bearings 1. Removing the Inner Wheel Bearings. Figure 7, Axle Hub with Inner Bearings, Exploded View Reference Number 1-9 10 11 12 13 Description Quantity per axle Part Number See Page 6 Rotor Bearing, Race (Cup), Inner Bearing, (Cone) Inner 2 Ea 2 Ea 2 Ea 02025-0204 02025-0048 02025-0047 Oil Seal Kit 2 Ea 00700840948 Complete these steps on both sides of the axle. a. b. c. d. Remove the rear wheels. Remove the brake calipers. Remove the axle shafts. (1), (2), (3), (4) and (8). Remove the hub nuts (5), lock washers (6), grease seals (7) and outer bearings (9). Discard the lock washers (6) e. Remove the brake rotors. f. Remove and discard the axle arm and rotor (13) oil seals. g. Remove and discard the inner bearings (11) and bearing races (12).
2. Installing Inner Bearing Race Figure 8, Parts and Tools Needed Page 10 of 31 Pages
b Page 11 of 31 Pages c Figure 9, Pressing in the Inner Bearing Race a. Put the rotor in the press with the inside facing upwards. b. Put the 02025-0048 inner bearing race (9) in the hub with the large hole facing upwards. Make sure it is level. c. Put the Inner Press Head on the bearing race and press the race into the hub until it seats.
Page 12 of 31 Pages 3. Installing Inner Tapered Bearing Figure 10, Parts and Tools Needed a. Put the tapered bearing (9) into the bearing packer tool. b. Pump bearing grease into the bearing until the grease emerges from between the bearing rollers.
Page 13 of 31 Pages c Figure 11, Inner Wheel Bearing, Installed c. Put the greased bearing into the bearing race with the small side facing down. Make sure it is level.
4. Installing the Rotor Oil Seal Figure 12, Parts and Tools Needed Page 14 of 31 Pages
Page 15 of 31 Pages Figure 13, Installing the Oil e Seal Figure 12 d. Apply RTV Silicone Gasket to the outside edge of the oil seal. e. Put the oil seal on top of bearing set. f. Press the oil seal onto the bearing.
Page 16 of 31 Pages 5. Installing the Axle Arm Oil Seal Make a driver tool from a 6-inch length of 3-inch water pipe. a b Figure 14, Oil Seal Driver Tool a. Cut 6 inches of 3-inch water pipe b. Install a cap on one end. c. Machine the other end 010 deep, 1 inch long. c Figure 15, Installing the Axle Arm Oil Seal d. Drive the new axle arm oil seal onto each axle arm.
Page 17 of 31 Pages 6. Installing the Hubs on the Axle c b Figure 16, Installing the Hubs a. Slide the hub and rotor assembly over the axle arm. b. Rotate the Hub back and forth to slip the seal over the axle arm. c. If necessary, tap the rim above the bearing (a) with a hammer and punch to seat the hub on the axle arm. When fully seated, the outer surface if the rotor is aligned with the edge of the backing plate (b). d. Repeat these steps for the other hub.
7. Installing the Outer Bearings Figure 17, Parts and Tools Needed Page 18 of 31 Pages
Page 19 of 31 Pages b Figure 18, Installing Outer Wheel Bearing a. Put the tapered bearing from the 02025-0433 bearing set with in the bearing packer tool and pump bearing grease into the bearing until the grease emerges from between the bearing rollers. b. Slide the greased bearing over the end of the axle arm.
8. Installing the outer Grease Seal Figure 19, Parts Needed Page 20 of 31 Pages
Page 21 of 31 Pages Tab and Groove Figure 20, Grease Seal, Installed Insert outer seal (7) over the end of the axle arm with the tab on the seal passing through the groove in the axle arm. Important: Make sure the oil seal faces the right direction. This side faces out. This side faces in.
9. Installing the Bearing Nuts and Washers Figure 21, Parts and Tools Needed Page 22 of 31 Pages
Page 23 of 31 Pages a Figure 22, Installing Inner Bearing Nut a. Thread the inner 02025-0051 (5) Wheel Bearing Nut onto the end of the axle arm. Important: Be careful not to cross-thread this nut. If the nut does not turn smoothly, it is probably cross-threaded. b. Use a 2 7/8 wrench to tighten the nut until it is snug. c. Push and pull on the rotor to check for end-play and turn the rotor to check the rotational friction. Tighten the nut enough to eliminate any noticeable end-play, not enough to create any noticeable increase in rotation friction.
Page 24 of 31 Pages Tab in Groove d Figure 23, Installing Bearing Nut Lock Washer d. Install a new lock washer (6) with the tab on washer in the groove in the axle arm. e Figure 24, Installing Outer Bearing Nut e. Install second nut and tighten it to 250-275 ft. lbs (340-373NM) A flat on the nut must align with a tab on the lock washer.
Page 25 of 31 Pages f f f. Bend one tab of star washer backwards over the flat of the inner nut and another tab on the opposite side of the star washer forward over a flat on the outer nut. g. Repeat a to f on the other hub and rotor assembly.
10. Installing the Axle Shafts Figure 25, Parts and Tools Needed Page 26 of 31 Pages
a c Figure 26, Inserting Axle Shaft a. Apply a layer of RTV Silicone Gasket on both rotor ends. b. Install new axle hub gaskets (8). c. Insert the Axle Shafts (4) into the axle assembly. Page 27 of 31 Pages
Page 28 of 31 Pages g g Figure 26, Installing Axle Shaft Bolts d. Put dowels (3) on 4 of the 14 bolts (1). e. Put Lock Washers on 10 of the bolts (1). f. Apply 2 drops of LockTite 271 to each of the 14 bolts. g. Install the bolts with dowels in the larger holes. Tighten the bolts to 70 ft-lbs. h. Install the remaining 10 bolts. Tighten the bolts to 70 ft-lbs. i. Repeat Steps a to h on the other Axle Shaft.
11. Page 29 of 31 Pages Completing The Job a. Service the brakes as required. If there is any oil on the brake pads, replace the pads. b. Reinstall the brake calipers. c. Install the wheels and tires. d. Drive the tractor and check axle and brake operation. e. If everything operates normally, return the tractor to service.