Caterpillar 270 Air Compressor Caterpillar

Symptom

The air compressor is leaking coolant.

Probable Cause

• Leaking plugs or coolant lines

Inspect plugs and lines for leaks. Tighten the plugs and the fittings if it is necessary. Tighten the plugs and the fittings to standard torque. If necessary, replace the O-ring seals on the plugs and the fittings.

• The cylinder head or the cylinder block is cracked from freezing, due to improper antifreeze strength.

Replace the cylinder head or the air compressor. Test the strength of the coolant. Refer to the Cooling System Specifications in the Operation and Maintenance Manual for your engine.

• Faulty air compressor due to porosity in casting

Replace the air compressor if porosity is detected.