TRANSMISSION G 4M8780 - Caterpillar

Removal Procedure
Start By:
Release the hydraulic system pressure. Refer to Disassembly and Assembly, "Hydraulic System Pressure - Release".
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.
Note: Cleanliness is an important factor. Before the disassembly procedure, the exterior of the component should be thoroughly cleaned. This will help to prevent dirt from entering the internal mechanism.Note: Put identification marks on all lines, on all hoses, on all wires, and on all tubes for installation purposes. Plug all lines, hoses, and tubes. This helps to prevent fluid loss and this helps to keep contaminants from entering the system.
Connect the steering frame lock. Refer to Operation and Maintenance Manual, "Steering Frame Lock".
Disengage the parking brake. Refer to Operation and Maintenance Manual, "Parking Brake Manual Release".
Illustration 1 g01172392
Disconnect center drive shaft (1) and position center drive shaft (1) to the side.
Illustration 2 g01172402
Disconnect rear drive shaft (2) and position rear drive shaft (2) to the side.
Illustration 3 g01172489
Disconnect hose assemblies (3) and (4) . Remove caps (5) .
Illustration 4 g01172501
Remove pin (6) . Loosen rod (7) . Remove bolts (8) . Position actuator assembly (9) to the side.
Illustration 5 g01172505
Remove pin (10) . Remove spacers (11) . Remove brake shoe assemblies (12) .
Illustration 6 g01172509
Remove bolts (13) . Use two people in order to remove caliper assembly (14) . The weight of caliper assembly (14) is approximately 36 kg (80 lb).
Illustration 7 g01172513
Remove bolts (15) and remove mount (16) .
Illustration 8 g01172537
Measure the thickness of disc (18) . Replace disc (18) before the thickness reaches 22.0 mm (0.90 inch). Remove bolt (17) . Use two people in order to remove disc (18) . The weight of disc (18) is approximately 34 kg (75 lb).
Illustration 9 g01172540
Remove bolts (19) from disc (18) . Remove O-ring seal (20) .