SEGMENT-SPROCKET 6Y5661 - 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.
Move the machine forward. Allow the machine to stop without the use of the service brakes. 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.
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Stop the machine on a level surface. 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.
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Do not attempt to tighten the track when dimension (1) is less than 3 mm (0.12 inch). Consult your Caterpillar dealer for track service or instructions.
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Remove the valve cover plate (adjusting).
Add grease (MPGM) through adjusting valve (2) until the track is tight.
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Make a mark on the roller frame 12 mm (0.50 inch) behind the idler bearing support. A space is needed for the front idler to retract.
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Allow the idler to move back by opening the relief valve ONE TURN ONLY. Move the machine in REVERSE. This will help move the idler backward.
Close the relief valve.
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Add grease (MPGM) through adjusting valve (2) until the mark on roller frame (3) is aligned with the rear edge of idler bearing support (4) .
Install the valve cover plate.
Repeat the procedure on adjusting of the other track for the other side.