DOOR AS 3419751 - Caterpillar

Personal injury can result from air pressure against the brake piston.The brake piston can come out of the differential housing assembly with force when applying air pressure.To prevent possible personal injury, the brake piston must be retained in the differential housing assembly when applying air pressure.
Retain brake piston (15) . Apply shop air pressure to the fitting for the brake line. The correct air pressure is approximately 525 kPa (75 psi). Brake piston (15) will move out of the differential housing.
Remove seal (16) and seal (17) from the differential housing.
Illustration 4 g00451337
Remove bolt (19) and plug (18) from the flange face of the axle housing. Remove pin (9) , O-ring seal (8) , and dowel (7) from axle housing (2) .
Repeat Steps 1 through 11 for the remaining service brake.Installation Procedure
Table 2
Required Tools    
Tool    Part Number    Part Description    Qty    
A     138-7573     Link Bracket     2    
B     1P-2420     Transmission Repair Stand     1    
FT-0996 Positioning Gp (Axle Repair)     4    
FT-0957 Positioning Gp (Axle Repair)     4    
Thoroughly clean the parts of the service brakes.Note: When brake service is required, replace both friction discs. Replace all piston seals and all retraction springs. Inspect all surfaces for wear. Replace components, as required. Refer to Testing and Adjusting, RENR2112, "966G Wheel Loader and 972G Wheel Loader" for further information.
Illustration 5 g00451337
Apply 8C-8422 RTV Silicone Sealant to dowel (7) . Install dowel (7) . Seat dowel (7) in the bottom of the bore.
Apply clean SAE 30W power train oil to O-ring seal (8) . Install O-ring seal (8) and install pin (9) .
Illustration 6 g00451327
If necessary, install dowels (6) and (12) . Seat the dowels in the bottom of the bores.
Install seal (16) and seal (17) .
Apply petroleum jelly to seal (16) and seal (17) .
Apply clean hydraulic oil to piston (15) .Note: Install piston (15) evenly. Twisting or binding of the piston may cause seal damage.
Install piston (15) in the differential housing assembly.Note: Using a friction disc with less than 2.81 mm (0.11063 inch) of friction material will result in accelerated wear. Do not use the color of the friction disc as an indication of wear. The overall thickness and disc groove depth are better indications of wear.
Inspect friction disc (13) for wear. Replace the friction disc if the thickness of the friction material is less than 2.81 mm (0.11063 inch). Immerse the friction discs in clean SAE 30W oil. Install friction disc (13) , reaction plate (14) , and friction disc (13) .
Install cup (11) and spring (10) .
Install two springs (5) .
Install reaction plate (4) .
Illustration 7 g00451323
Install sun gear (3) .
Illustration 8 g00451163
Apply 6V-6640 RTV Silicone Sealant on the mating surfaces of the axle housing and differential housing.
Fasten Tooling (A) and a hoist to the rim of the axle shaft. Carefully install the axle housing assembly. The weight of axle