Caterpillar 72H PIPELAYER - Maintenance

Remove the filter element that is positioned in the operator's compartment below the left side of the dash.
The filter element can be cleaned by using pressure air. Use a maximum air pressure of 205 kPa (30 psi). Direct the air from the clean side to the dirty side.
Look through the filter toward a bright light. Inspect the element for damage. Inspect the gaskets for damage. Replace damaged filters.
Install the filter element.
Clean the filters more often in dusty conditions.

Clean the areas that are around the end pin with a high-pressure wash. Inspect the condition of the seal (1).
Check the area for oil leakage. Be sure that the seal is in a neutral position.
Remove plug (2).
Check the oil level. Oil level (4) should be at the top of the hex head on the fitting.
If the oil level is low, apply the gear oil through fitting (3) until the gear oil reaches oil level (4) at the top of the hex head on the fitting. Remove any excess oil. This exercise will maintain a volume of air. The gear oil must be applied with a 7H-1680 Lubrication Hand Pump.
Refer to Operation and Maintenance Manual, “Lubricant Viscosities” for the correct oil. The gear oil has excellent load carrying capacity.
Be sure that seals (1) are not pushed out. Push back the seals if the seals are pushed out.
Install plug (2).

The grease fittings are on the left side of the radiator guard and on the right side of the radiator guard. Lubricate the bearings by applying grease to the fittings. Use MPGM grease.

During the machine operation, listen for unusual squeaking and for unusual squealing. This noise can indicate a dry joint.
Check the machine for dry joints weekly. Check for dry joints immediately after machine operation. After machine operation, lightly touch the end of each track pin or bushing. Touch the track pin or the track bushing with the back of your hand. Make a mark on any dry track pin joint that is hot to the touch.

Caterpillar 72H PIPELAYER - Maintenance | Weekly