SHAFT 2A1282 - Caterpillar

3. Install a piece of round bar stock (1) that is 1.75 in. (44.5 mm) in diameter and 2.75 (69.8 mm) in length on the sprocket as shown.
Make sure the round bar stock goes between the bushing and sprocket inside the links.
4. Start the engine and move the track backward. Move the track until the length of the spring (from inside the retainers) is a minimum of 19.75 (50.16 cm).
The spring in the recoil spring assembly is assembled under a force of several tons. Do not put the recoil spring under compression or release the tension with the nut for the recoil spring bolt. Damaged threads on the recoil spring bolt or nut can cause the assembly to come apart and cause bodily injury.
5. Remove stop bolt (2) and the washer. Tighten nut (3) against the recoil spring retainer.6. Move the track forward and remove round bar stock (1) from the sprocket.7. Make a separation of the track. SEE SEPARATION OF TRACK. 8. Remove four bolts (4) and remove the track carrier roller and bracket as a unit. The weight of the roller and bracket is 45 lb. (20 kg). 9. Remove bolt (5). Slide the front idler and rod forward as far as possible on the roller frame. 10. Remove two bolts from retainer (6). Remove the retainer.11. Remove the three bolts that hold bars (7) on both sides of recoil spring. 12. Fasten a hoist to the recoil spring. Remove the recoil spring and hydraulic track adjuster as a unit. The weight is 350 lb. (159 kg).Install Recoil Spring And Hydraulic Track Adjuster
1. Check to see that the recoil spring length (from inside the retainers) is assembled to a length of 19.75 in. (50.16 cm).2. Fasten a hoist to the recoil spring. Put the recoil spring and hydraulic track adjuster in position on the roller frame. 3. Put bars (2) in position on both sides of the spring. Install the bolts that hold the bars in place. Install retainer (1).4. Slide the front idler and rod back into position. Install the bolt that holds the rod in the cover for the cylinder. 5. Put the track carrier roller and bracket (3) in position on the carbody frame. Install the four bolts.6. Make a connection of the track. SEE CONNECTION OF TRACK. Do not make adjustment to the track at this time. 7. Install a piece of round bar stock (4) that is 1.75 (44.5 mm) in diameter and 2.75 (69.8 mm) in length on the sprocket.
Make sure the round bar stock goes between the bushing and sprocket inside the links.
8. Start the engine and move the track backward until the pressure on nut (5) is released. If necessary, tighten the track to release pressure on the nut.9. Loosen nut (5) until it is extended beyond end of shaft .06 .03 in. (1.5 0.8 mm). Install the bolt and washer in end of shaft.10. Move the track forward and remove the round bar stock. 11.