COUPLING-QDISC 2639602 - Caterpillar

Removal Procedure
Table 1
Required Tools    
Tool    Part Number    Part Description    Qty    
A     2B-9886     Hydraulic Jack     1    
B        
76.2 mm (3 inch) by
63.5 mm (2.50 inch) pin     1    
Illustration 1 g00693711
Remove bolts (3), bolts (2) and the washers. Remove guard assembly (1) from the track roller frame.
Illustration 2 g00694278
Remove bolts (4) and the washers. Remove cover assembly (5) from the track roller frame.
Personal injury can result from grease under high pressure.The adjuster cylinder for the track is under high hydraulic pressure. Grease under high pressure can cause injury. Do not visually inspect the adjuster to see if grease is released when the valve is opened. Check the rod to see that it moves to the rear into the front support on the track roller frame.
Illustration 3 g00694320
Illustration 4 g00694306
Loosen the track in the following manner.
Turn valve (6) for one turn counterclockwise in order to allow the release of grease from the vent. If the track does not loosen start the machine and move the machine forward and backward. Refer to Step 3.b if the track does not loosen.
Install Tooling (B) between the track and sprocket segment (7), as shown. Tooling (B) must make contact with a track bushing. Move the machine rearward so that the track will be pushed up by Tooling (B). Tooling (B) will tension the track. The front idler and the track adjuster will be pushed against the force of the recoil spring. Refer to Step 3.c if the track does not loosen.
Illustration 5 g00694372
Illustration 6 g00694306
Illustration 7 g00694320
Move the machine forward so Tooling (B) does not put tension on the track. Loosen bolts (8) to a distance of 6.4 mm (0.25 inch). Move the machine to the rear so that Tooling (B) will push up the track. Grease will be forced through the secondary purge hole. This will allow the track to loosen. After the track is loosened, move the machine forward and remove Tooling (B) from the track. Tighten bolts (78) in the track adjuster. Tighten valve (6) in the track adjuster to a torque of 70 15 N m (52.0 11.0 lb ft).
Illustration 8 g00694387
Illustration 9 g00694411
Install Tooling (A) between the track and the track roller frame. Use tooling (A) to lift the track off carrier roller (9) .
Remove nuts (12), the washers and bolts (10) from bracket (11). Remove track carrier roller (9) from the bracket.