Installation Procedure
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Table 1
| Required Tools |
| Tool |
Part Number |
Part Description |
Qty |
| A |
5P-0954 |
Wrench |
1 |
| B |
1P-0769 |
Seal Guide |
1 |
| C |
- |
Loctite 290 Threadlocker Wicking Grade |
- |
| D |
1U-8846 |
Gasket Sealant |
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| NOTICE |
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Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids. Refer to Special Publication, NENG2500, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat products. Dispose of all fluids according to local regulations and mandates. |
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Personal injury can result from hydraulic oil pressure and hot oil. Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped. Serious injury can be caused if this pressure is not released before any service is done on the hydraulic system. Make sure all of the attachments have been lowered, oil is cool before removing any components or lines. Remove the oil filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand. |
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Note: Cleanliness is an important factor. Before assembly, all parts should be thoroughly cleaned in cleaning fluid. Allow the parts to air dry. Wiping cloths or rags should not be used to dry parts. Lint may be deposited on the parts which may cause later trouble. Inspect all parts. If any parts are worn or damaged, use new parts for replacement.
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| Illustration 1 | g00701719 |
Note: Lubricate bearing cone (29) with the lubricant that is being used prior to installation.
- Use a suitable press and Tooling (B) in order to Install shaft (24) in bearing cone (29) .
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| Illustration 2 | g00701111 |
Note: Lubricate the sealing lip of seal (28) with the lubricant that is being used.
- Install two bearing cups (27) and seal (28) .
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| Illustration 3 | g00701722 |
- Install shaft assembly (24) in housing (25) .
Note: Lubricate bearing cone (26) with the lubricant that is being used prior to installation.
- Install bearing cone (26) . Leave slight bearing end play.
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| Illustration 4 | g00701106 |
- Install washer (23) .
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| Illustration 5 | g00701723 |
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| Illustration 6 | g00701724 |
- Install nut (22) . Secure housing (25) in a holding fixture. Use a torque wrench and Tooling (A) in order to check the rolling torque.
The proper rolling torque is 0.7 to 1.4 N·m (6.23 to 12.46 lb in) for new bearings. If the existing bearings are used, limit the rolling torque to half of the specification.
Note: If the rolling torque exceeds the specification, back off nut (22) by a 1/8 turn. Reseat the bearings and repeat Steps 3 through 6.
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| Illustration 7 | g00701102 |
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| Illustration 8 | g00335136 |
Completed Stake (E) The spherical radius of the tool for peening must be 7.5 to 8.0 mm (0.295 to 0.315 inch).
(F) The acceptable angle of the tool for peening is 20 ± 10 degrees.
(G) The minimum length of the crimp is 4.7 mm (0.185 inch).
(H) The minimum depth of the crimp is 2.5 mm (0.098 inch).
(J) Top view
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Note: Before you stake the nut, make sure that the pinion shaft has zero end play.
- When the rolling torque is correct, stake nut (22) by peening the collar in the slot in shaft (24) . See Illustration 8 and the caption for the correct dimensions.
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| Illustration 9 | g00701096 |
- Install seals (20) and bearing (21) in support (17) .
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| Illustration 10 | g00701091 |
Note: If housing (25) is being replaced, install 60 percent of a new shim pack as a starting point for the pinion depth adjustment.
- Use a suitable lifting device in order to place support (17) . Install seal (19) and shims (18) . The weight of support (17) is approximately 36.3 kg (80 lb).
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| Illustration 11 | g00701088 |
- Use a suitable lifting device in order to place support (17) and the pinion assembly together. Install bolts (16) and the washers. Tighten bolts (6) to a torque of 120 ± 20 N·m (89 ± 15 lb ft). The weight of support (17) and the pinion assembly is approximately 72.5 kg (160 lb).
- If housing (25) is being replaced follow Steps 13 through 22.
- If housing (25) is not being replaced proceed to Step 23.
- Remove the axle housings. Refer to Disassembly and Assembly, "Brake and Planetary - Disassemble".
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| Illustration 12 | g00701831 |
- Place the differential housing in a horizontal position, as shown.
- Install nut (30) . Tighten nut (30) to a position that maintains gear backlash and a zero to slight bearing preload. Rotate the pinion shaft and record the rolling torque.
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| Illustration 13 | g00701835 |
- Rotate nut (30) clockwise for two additional lugs in order to set the bearing preload. Install the lock and bolt (31) .
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| Illustration 14 | g00667258 |
- Use a torque wrench to measure the overall rolling torque at the pinion shaft. The rolling torque must be 1.4 to 6 N·m (12 to 53 lb in) for new bearings. The torque for used bearings should be 0.7 to 3 N·m (6 to 26 lb in).
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| Illustration 15 | g00315875 |
- After the backlash adjustment and the preload adjustment have been made, the tooth contact between the pinion shaft and the bevel gear must be checked. Use the following procedure:
- Put a small amount of rouge compound on the teeth of the bevel gear.
- Rotate the pinion shaft for several revolutions in one direction. Then rotate the pinion shaft for several revolutions in the opposite direction. Then turn the pinion shaft in the original direction in order to observe the marked teeth.
- The correct area of tooth contact begins near the inside end of the teeth. The contact area should extend to a maximum of 50 percent of the length of the teeth. See Illustration 15 for the correct area of tooth contact.
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| Illustration 16 | g00315877 |
- If the tooth contact looks like the marks in Illustration 16, perform the following procedure:
- Remove some of the shims that are behind the pinion housing.
- Repeat Steps 14 through 16 for the backlash adjustment.
- Repeat Step 17 in order to check the overall rolling torque at the pinion shaft.
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| Illustration 17 | g00315878 |
- If the tooth contact looks like the marks in Illustration 17, perform the following procedure:
- Add shims behind the pinion housing.
- Repeat Steps 14 through 16 for the backlash adjustment.
- Repeat Step 17 in order to check the overall rolling torque at the pinion shaft.
Note: Always make sure that the backlash adjustment is correct before an adjustment is made to the area of tooth contact. Several adjustments to the backlash and to the tooth contact may be necessary in order to achieve the correct adjustments. A change to gear backlash will also change the gear contact and vice versa.
- After the adjustments are made, remove rouge compound from the gears.
- Install the axle housings. Refer to Disassembly and Assembly, "Brake and Planetary - Assemble".
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| Illustration 18 | g00701877 |
- Apply Tooling (C) to bolts (16) and the washers.
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| Illustration 19 | g00701086 |
- Use bolts (14) in order to install baffle (15) . Tighten bolts (14) to a torque of 14 ± 3 N·m (124 ± 26.5 lb in).
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| Illustration 20 | g00701893 |
- Clean the mating surfaces of the axle housing and trunnion (13) . Apply a continuous bead of Tooling (D) to the axle housing. Use bolts (12) and the washers in order to install trunnion (13) . Tighten bolts 12 to a torque of 120 ± 20 N·m (89 ± 15 lb ft).
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| Illustration 21 | g00701082 |
Note: Lubricate the seals and bearing with lubricant that is being used.
- Install seal (10) and washer (11) .
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| Illustration 22 | g00701084 |
- Install bearing (9) in the rear trunnion support.
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| Illustration 23 | g00701064 |
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| Illustration 24 | g00701076 |
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| Illustration 25 | g00701077 |
- Use a suitable lifting device in order to raise oscillating axle housing (2) .
- Carefully install oscillating axle housing (2) in the rear trunnion support. The weight of oscillating axle housing (2) is approximately 499 kg (1100 lb).
- Install bolts (7) and (8) . Tighten bolts (7) and (8) to a torque of 100 ± 20 N·m (75 ± 15 lb ft). Tighten bolts (7) and bolts (8) by an additional 120 ± 5 degrees.
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| Illustration 26 | g00701068 |
- Install seal (5) and washer (6) .
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| Illustration 27 | g00701067 |
- Use bolts (3) and the washers in order to install plate (4) . Tighten bolts (3) to a torque of 80 ± 15 N·m (60 ± 10 lb ft). Tighten bolts (3) by an additional 60 ± 5 degrees.
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| Illustration 28 | g00701062 |
- Connect tube assembly (1) .
- Fill the oscillating axle housing with oil. Refer to Operation and Maintenance, SEBU6868, "Refill Capacities"and Operation and Maintenance, SEBU6868, "Lubricant Viscosities"for the proper type and capacity.
- Check the hydraulic oil level. Refer to Operation and Maintenance, SEBU6868, "Refill Capacities"and Operation and Maintenance, SEBU6868, "Lubricant Viscosities"for the proper type and capacity.
End By:
- Install the rear tires. Refer to Disassembly and Assembly, "Tire and Rim - Remove and Install".
- Install the hydrostatic drive. Refer to Disassembly and Assembly Supplement, "Hydrostatic Drive - Install".
