12H, 140H, 143H, 160H and 163H Motor Graders Hydraulic and Steering System Circle Drive - Slip Clutch Caterpillar


Circle Drive - Slip Clutch
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Illustration 1g03833798

Table 1
Specification for 5T-0570 Circle Drive Gp    
Item     Qty     Part     Specification Description    
1     1     1H-7339 O-Ring Seal     Lubricate the seal lightly with the lubricant that is being sealed.    
2     As required, use the following shims in order to obtain the preload on the bearings.    
10 7D-8983 Shim     Thickness is 0.127 mm (0.0050 inch).    
6 7D-8984 Shim     Thickness is
0.178 mm (0.0070 inch).    
3     1     2H-3935 O-Ring Seal     Lubricate the seal lightly with the lubricant that is being sealed.    



Illustration 2g03833801

Section A-A

Table 2
Item     Qty     Part     Specification Description    
-     4     1F-7958 Full Nut     Use the following procedure in order to tighten the nuts :

1. Tighten the nut (4) to
20 N·m (177 lb in) and nut (5) to
40 N·m (30 lb ft) and again, tighten the nut (4) to
80 N·m (59 lb ft) and nut (5) to
80 N·m (59 lb ft).
2. Rotate the worm three revolutions then back off the nuts.
3. Tighten the nut (4) to
20 N·m (177 lb in) and nut (5) to
40 N·m (30 lb ft) and then tighten the nut (4) to
40 N·m (30 lb ft) and rotate the worm to three revolutions.
5. Tighten the nut (4) to
40 N·m (30 lb ft) and tighten the nut (5) to
40 N·m (30 lb ft).
6. Measure the average gap between the housing and adapter at the locations being torqued. Subtract
0.145 ± 0.065 mm (0.0057 ± 0.0026 inch) to obtain the desire shim pack thickness.    



Illustration 3g03833802

Section B-B

Table 3
Item     Qty     Part     Specification Description    
6     6     6Y-7953 Friction Disc     Thickness of 11 new friction discs is
24.82 ± 1.13 mm (0.977 ± 0.044 inch)
Thickness of friction disc (6) is
2.87 ± 0.08 mm (0.113 ± 0.003 inch).
Thickness of friction disc (7) is
1.52 ± 0.13 mm (0.060 ± 0.005 inch).    
7     5     2G-0478 Friction Disc    
8     3     6V-5686 Bolt     Use the following bolt tightening procedure to tighten the bolts :
1. Tighten the bolts to
150 ± 20 N·m (111 ± 15 lb ft).
2. Remove the bolts after 45 minutes in order to add the shims (9) .
3. Install the bolts, and tighten to
150 ± 20 N·m (111 ± 15 lb ft).
4. Again tighten to
240 ± 40 N·m (177 ± 30 lb ft).
5. Confirm the torque is
240 ± 40 N·m (177 ± 30 lb ft).    
9     As required, use shim (9) in order to obtain a
2.30 ± 0.25 mm (0.091 ± 0.010 inch) deflection of disc spring (10) .    
6 307-1959 Shim     Thickness is
0.13 mm (0.005 inch).    
1 307-1960 Shim     Thickness is
0.25 mm (0.010 inch).    
1 307-1962 Shim     Thickness is
0.5 mm (0.02 inch).    
10     1     6G-6122 Disc Spring     Length under test force is
10.63 mm (0.419 inch).
Test force is
98490 ± 19700 N (22142 ± 4429 lb).
Free length after test is
12.94 mm (0.509 inch).    
11     1     5H-4909 O-Ring Seal     Lubricate the O-ring seal lightly with the lubricant that is being sealed.    
12     7     9T-8051 Bolt     Torque to
68 ± 7 N·m (50 ± 5 lb ft).    
13     4     2J-3506 Full Nut     Torque to
430 ± 60 N·m (317 ± 44 lb ft).    
14     1     5K-5288 Duo-Cone Seal Gp     Rubber toric seals and all surfaces in contact with the seals must be clean and dry at assembly. Apply a thin layer of oil on the surfaces of the metal seals that are in contact just before installation. The metal seal must be assembled square with the bore. The rubber toric seals must not bulge. The rubber toric seals must not be twisted.    
15     1     5K-5959 O-Ring Seal     Lubricate the seal lightly with the lubricant that is being sealed.    
16     1     1A-1415 Nut     Torque to
160 ± 30 N·m (118 ± 22 lb ft).    



Illustration 4g03833804

6G-1908 Drive Housing

Table 4
Item     Qty     Part     Specification Description    
17     4     2D-8154 Taperlock Stud     Torque to
55 ± 10 N·m (41 ± 7 lb ft).    
18     4     7D-3504 Taperlock Stud     Torque to
150 ± 20 N·m (111 ± 15 lb ft).    
19     1     8D-7426 Bushing     Bore before assembly is
63.50 ± 0.03 mm (2.500 ± 0.001 inch).
Installation depth is
2.0 ± 0.5 mm (0.08 ± 0.02 inch).    

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