561M Pipelayer Bevel and Transfer Gears - Power Shift Caterpillar


Bevel and Transfer Gears - Power Shift
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561M Pipelayer [SENR1753]
POWER TRAIN
GEAR GP
561M Pipelayer Bevel and Transfer Gears - Power Shift
1.1. Adjustment of Bearing End Play for the Lower Transfer Gear
2.1. Adjustment of Bearing End Play for the Upper Transfer Gear and the Bevel Pinion Gear
3.1. Adjustment of Bevel Gear Backlash



Illustration 1g00670124



Illustration 2g00670125

(1) Put a light coating of lubricant in the bore. The lubricant that is used in the gear case may be used for this purpose.

(2) Put a light coating of lubricant on the sealing lip. The lubricant that is used in the gear case may be used for this purpose.

(4) Torque for bolts ... 135 ± 15 N·m (100 ± 11 lb ft)

(5) As needed, use shims in order to get the following end play in the bearing. ... 0.08 ± 0.05 mm (0.003 ± 0.002 inch)

(6) Put 5P-3931 Thread Compound on the face and on the threads of the nut. Tighten the nut to the following torque. ... 612 ± 68 N·m (451 ± 50 lb ft)

(8) As needed, use shims in order to get the following end play in the bearing. ... 0.08 ± 0.05 mm (0.003 ± 0.002 inch)

(11) Torque for nuts on the sensors ... 25 ± 5 N·m (221 ± 44 lb in)

Adjustment of Bearing End Play for the Lower Transfer Gear

  1. Before assembly of the other components, make sure that the bearing cups and cones are properly installed. The bearing cups and cones must be seated against the shoulder of the housing and the shoulder of the shaft. Use a piece of 0.038 mm (0.0015 inch) thick shim stock or a standard feeler gauge in order to verify that the bearing cups and cones are properly seated.

  1. Place the axis of the gear or shaft in a vertical position. Install bearing cage (3) without installing shims (5) and without installing the O-ring seal (if equipped). Make sure that the cage does not bind in the housing.

  1. Install two bolts (4) and two washers with approximately 180 degrees between the bolts.

  1. Use the following steps to tighten bolts (4) :

    1. Tighten the bolts to a torque of 2.25 N·m (20 lb in).

    1. Rotate the gear or the shaft at least three revolutions.

    1. Tighten the bolts to a torque of 4.5 N·m (40 lb in).

    1. Rotate the gear or the shaft at least three revolutions.

    1. Tighten the bolts again to a torque of 4.5 N·m (40 lb in).

    1. Use a tapered feeler gauge or another suitable device for measuring. Measure the first gap between the bearing cage and the housing. Measure the gap outward from the center of the bolt at the OD of the flange. Measure the second gap near the other bolt in the same manner.

  1. Average the two measurements from Step 4.f. Add 0.18 mm (0.007 inch) to this average. The result of this addition is the thickness of shims that are required.

  1. Assemble the shim pack to the correct thickness. Use a micrometer to verify that the shim pack is the correct thickness.

  1. Remove bearing cage (3). Reassemble the components with the correct shim pack and O-ring seal (if equipped). Tighten all bolts to the specified torque.

  1. The desired setting for end play of the bearing is 0.08 ± 0.05 mm (0.003 ± 0.002 inch).

Adjustment of Bearing End Play for the Upper Transfer Gear and the Bevel Pinion Gear

Table 1
Tools Needed     A     B    
FT-1986 Stud     1        
2P-8257 Plate     1        
6B-6684 Full Nut     5        
2P-8260 Cylinder Liner Installer     1        
4B-5273 Washer     3        
1D-4719 Full Nut     2        
0S-1590 Bolt     1        
8S-2328 Dial Indicator         1    

  1. Remove bolt (13) and retainer (12) .

  1. Put shims (8) (total thickness of 4.37 mm (0.172 inch)) and cover (10) into position. Install the bolts that hold the components in place.

  1. Install Tooling (A). Install Tool (B) with the point of the dial indicator against the front face of the bearing cone.

  1. Use Tooling (A) in order to push the gear and the pinion downward. Use a ratchet wrench in order to rotate the gear and the pinion for a minimum of three revolutions. Watch the dial indicator as the needle moves. Stop rotating the gear and the pinion when you observe the maximum amount of needle movement.

  1. Zero the dial indicator. Put a mark on the bearing cone that indicates the point of maximum amount of needle movement.

  1. Pull the gear and the pinion upward with Tooling (A). Rotate the gear and the pinion for a minimum of three revolutions. Stop the gear and the pinion at the same point of maximum amount of needle movement. Record the measurement on the dial indicator. This reading is the actual bearing clearance.

  1. Repeat Steps 4 through 6. The two readings should be equivalent.

  1. Remove cover (10). Remove enough shims in order to obtain a bearing clearance (end play) of 0.08 ± 0.05 mm (0.003 ± 0.002 inch). Reinstall cover (10) .

  1. Install retainer (12) and bolt (13) .

Adjustment of Bevel Gear Backlash


NOTICE

After adjusting or checking backlash, remove the plate that was holding the pinion gear in place.


(9) Fabricate one plate from 6.0 mm (0.25 inch) thick mild steel. Fabricate the plate to the following dimensions:

(A) 114.0 mm (4.50 inch)

(B) 85.0 mm (3.35 inch)

(C) 32.0 mm (1.25 inch)

(D) 14.5 mm (0.57 inch)

(E) 11.0 mm (0.44 inch)

  1. Install plate (9) in order to keep the pinion gear from turning while the backlash is being set.

  1. As required, use shim packs (7) to obtain 0.20 ± 0.10 mm (0.008 ± 0.004 inch) backlash. Check backlash after removing end clearance in the bearing assembly.

    Note: The range of backlash is measured on three approximately equal spaced teeth. The range should not be more than 0.08 mm (0.003 inch).

  1. Remove plate (9) after the backlash has been adjusted.

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