ROD 2A1279 - Caterpillar

1. Start the engine. Back the machine up on tooling (A). Put tooling (B) under rear of carbody. Put tooling (A) in front of tracks. Move machine forward up on tooling (A) until weight of machine is on tooling (B). Put tooling (B) under front of carbody. Move tracks backward until weight of machine is on tooling (B).2. Tighten the track until it is against the track rollers.
Do not tighten the track too tight. Damage to the seals in the track adjusting mechanism will be the result.
3. Remove four bolts (2). Loosen the track. Lower roller (1) and remove it from under the track roller frame. The weight of the roller is 85 lb. (39 kg).Install Track Rollers
1. Put track roller (1) in position on the track.2. Tighten the track until the roller is against the roller frame. Install the four bolts in the roller. Tighten the bolts to a torque of 225 20 lb.ft. (31.1 2.8 mkg). 3. Put tooling (A) in front of tracks. Start the engine. Move tracks forward up on tooling (A). Remove tooling (B) from under front of carbody. Put tooling (A) at rear of tracks. Move machine backward up on tooling (A). Remove tooling (B) from under rear of carbody. Move machine forward off of tooling (A).4. Make an adjustment to the track. See TRACK ADJUSTMENT in LUBRICATION AND MAINTENANCE GUIDE.Disassemble Track Rollers
start by: a) remove track rollers1. Remove the plug from the end of the shaft. Remove the oil from the roller. 2. Install tooling (A) on roller (3). Put collar (2) under compression until ring (1) can be removed. Remove the ring from the shaft.3. Remove tooling (A) from the roller. Remove collar (2). Remove the O-ring seal from the shaft.4. Remove the Duo-Cone seal from the collar and bushing. Put identification on the seals to prevent mixing at assembly.5. Follow Steps 2 through 4 and remove the ring, collar, O-ring seal, and Duo-Cone seal from the other end of the roller. 6. Remove the six bolts (4) from each side of the roller.7. Remove the two bushings and shaft (5) from the roller with a press. See TRACK ROLLER SPECIFICATIONS in TESTING AND ADJUSTING.
TYPICAL EXAMPLE8. Remove bushing (6) from bushings (8) with a press.9. Cut pins (7) off even with the bushing. Make the surface of the bushing smooth with a file.Assemble Track Rollers
1. Put the oil holes in the bushings in alignment. Install bushings (1) in bushings (3) with a press. Drill two .297 in. (7.54 mm) holes 180° apart .75 in. (19.05 mm) deep through bushings (1) and into bushings (3). Do not drill the holes through the lubrication grooves on bushings (1). Install two new pins (2) even with the outside face of bushings (1).
TYPICAL EXAMPLE2. Install the O-ring seals on the bushings. Put oil on the seals and contact surfaces of the bushings and roller. Install one of the bushings in the roller with tooling (A) and a press. Install the bolts