ELBOW 3399661 - Caterpillar

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.
Check
Check the track adjustment. Check the track for wear and for excessive dirt buildup.
Move the machine forward for a distance of two times the length of the machine. Stop the machine on a level surface without the use of the service brake. Lower all the implements. Apply slight down pressure to all the implements. Engage the parking brake lock lever. Place the transmission in NEUTRAL and stop the engine.
Illustration 1 g01281833
Left track roller frame
Do not attempt to tighten the track when dimension (X) is less than 3 mm (0.12 inch). Consult your Caterpillar dealer for track service or instructions.
Measure the "X" dimension.
Stand on the track between the front idler and the track carrier roller in order to produce as much track sag as possible.
Illustration 2 g01291428
Points (1, 2) are above the centerlines when the machine is stopped.
Attach one end of a string to the grouser tip on the track shoe that is directly above track carrier roller (1). Make the string tight by pulling on the string. Attach the opposite end of the string to the grouser tip on the track shoe (2) that is directly above the front idler .
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 in order to obtain dimension (A) .
Dimension (A) should be approximately 50 mm (2.0 inch). If dimension (A) 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.
Move the machine forward for a distance of two times the length of the machine. Allow the machine to a stop without the use of the service brakes. Shut off the engine. Adjust the tracks while you are in the machine's typical operating conditions. If packing conditions prevail on the job, the tracks should be adjusted with packing material.
Illustration 3 g01281894
Remove the cover for the track adjusting mechanism.
Add grease (MPGM) through adjusting valve (4) in order to move the idler forward until the track is fully tight.
Illustration 4 g01281905
(B) Mark on roller frame
Mark the roller frame with a pencil or with a marking pen. Make a mark (B) that is 12 mm (0.50 inch) behind idler bearing support (5). This allows the necessary space for the front idler to retract.
Allow the idler to move back by opening relief valve (3) ONE TURN ONLY. Move the machine in REVERSE. This will help move the idler backward.
Close relief