TACHOMETER 3T2159 - Caterpillar

Disassembly Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 1P-2420 Transmission Repair Stand 1
B 1P-1863 Retaining Ring Pliers 1 Start By:
Remove the front axle. Refer to Disassembly and Assembly, "Fixed Axle (Front) - Remove".
Remove the rear axle. Refer to Disassembly and Assembly, "Oscillating Axle (Rear) and Trunion Support - Remove".
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, "Caterpillar Tools and Shop Products Guide" for tools and supplies suitable to collect and contain fluids on Caterpillar products.Dispose of all fluids according to local regulations and mandates.
Note: Put identification marks on all lines, on all bolts, and on all tubes for installation purposes. Plug all lines, all hoses and all tubes. This helps to prevent fluid loss and this helps to keep contaminants from entering the system.
Illustration 1 g00663942
Use a suitable lifting device in order to place the axle housing on Tooling (A). The weight of the axle housing is approximately 499 kg (1100 lb).
Use a suitable lifting device in order to support axle housing assembly (1).
Remove bolts (2) and remove axle housing assembly (1). The weight of axle housing assembly (1) is approximately 145 kg (320 lb).
Illustration 2 g00663943
Remove reaction plate (3).
Illustration 3 g01058656
Remove sun gear (4) and friction disc (5).
Illustration 4 g01058657
Remove springs (6).
Release piston (8) by blowing shop air into fitting (7). Remove piston (8).
Illustration 5 g00663947
Remove seals (9) and (10).
Illustration 6 g00505313
Use Tooling (B) in order to remove retaining ring (11) from the end of the axle shaft. Note: This will allow the planetary gear assembly to be removed.
Illustration 7 g01058663
Illustration 8 g00505316
Remove planetary carrier (12) from the axle housing.
Illustration 9 g00505318
Drive spring pin (13) into the planetary shaft of planetary carrier (12). Note: This will release the entire planetary gear and bushing assembly.
Illustration 10 g01055993
Push shaft (16) through the planetary carrier.
Remove washers (14) and (15) from planetary carrier (12).
Remove planetary gear (17) and bushing (18) from planetary carrier (12).
Remove spring pin (13) from shaft (16).
Repeat Steps 11 through 15 for the other two planetary gears.