HARNESS AS-ENGINE 1636109 - Caterpillar

Check (963K)
Check the track adjustment. Check the track for wear and for excessive dirt buildup. Replace the track if the track is worn. Clean the track, if necessary.
Move the machine forward for a distance of two times the length of the machine. Allow the machine to stop slowly without the use of the service brake. Shut off the engine.
Illustration 1 g01423900
Place a tight line over the grouser tips above the front carrier roller (1) and the front idler (2).
Measure the distance between the string and the tip of the grouser that is on the track shoe directly between the front idler and the track carrier roller to obtain dimension (A).
Dimension (A) should be approximately 50 10 mm (2.0 0.4 inch). If dimension (A) is not correct, adjust the track.Check (953K)
Check the track adjustment. Check the track for wear and for excessive dirt buildup. Replace the track if the track is worn. Clean the track, if necessary.
Move the machine forward for a distance of two times the length of the machine. Allow the machine to stop slowly without the use of the service brake. Shut off the engine.
Illustration 2 g01225763
Place a tight line over the grouser tips above the final drive (1) and the carrier roller (2).
Measure the distance between the string and the tip of the grouser that is on the track shoe directly between the rear idler and the track carrier roller to obtain dimension (A).
Place a tight line over the grouser tips above the front idler (3) and the carrier roller.
Measure the distance between the string and the tip of the grouser that is on the track shoe directly between the front idler and the track carrier roller to obtain dimension (B).
The average of dimension (A) and dimension (B) is (A+B)/2. This average should be approximately 42.5 7.5 mm (1.7 0.3 inch). If the average of dimension (A) and dimension (B) is not correct, adjust the track.Adjust
Grease is under high pressure.Grease coming out of the relief valve under pressure can penetrate the body causing injury or death.Do not watch the relief valve to see if grease is escaping. Watch the track or track adjustment cylinder to see if the track is being loosened.Loosen the relief valve only one turn.
Illustration 3 g00994405
Loosen the bolts and remove the cover for the track adjusting mechanism.
If necessary, add grease with a grease gun to allow the idler to move forward. This procedure will reduce the sag in the track.
If necessary, open the relief valve to allow the idler to move backward. This procedure will increase the sag in the track. Close the relief valve.
Illustration 4 g00484870
Measure dimension (X), as shown above. Dimension (X) is the distance from the face of the bulkhead to the center of the pin in the yoke. If dimension (X) is less than 134 mm (5.3 inch), proceed to Step 5.If dimension (X) is greater than 134 mm (5.3 inch), the front idler must be moved forward to a secondary position. Refer to Power Train Disassembly