TM 5-3810-300-24 & P2
E. If the compressor does not function as described above, or leakage is excessive, it is recommended that it be
returned to the factory. If this is not possible, the compressor can be repaired, in which case, the following
information should prove helpful.
Since all Tu-Flo 501 Compressors are connected to the engine's pressurized oil system, a continuous flow of oil is
provided to the compressor, which is eventually returned to the engine.
Oil is fed into the compressor in various ways, for example: through the rear end cover, the drive end of the crankshaft or
through the front flange adapter. An oil passage in the crankshaft conducts pressurized oil to the precision sleeve main
bearings and to the connecting rod bearings. Splash lubrication of the cylinder bores, connecting rod wrist pin bushings,
and the ball type main bearings, on some models, is obtained as oil is forced out around the crankshaft Journals by engine
Every month, 300 operating hours or after each 10.000 miles depending on the operating conditions, experience and the
type of strainer used, service the air strainer.
Remove and wash all of the parts. The strainer element
should be cleaned or replaced. If the element is
cleaned, it should be washed in a commercial solvent or
a detergent and water solution. The element should be
saturated in clean engine oil then squeezed dry before
replacing it in the strainer. Be sure to replace the air
strainer gasket if the entire air strainer is removed from
the compressor intake.
EVERY 6 MONTHS, 1800 OPERATING HOURS OR AFTER EACH 50,000 MILES
Remove the discharge head fittings and inspect the compressor discharge port and discharge line for excessive carbon
deposits. If excessive buildup is noted in either, the discharge line must be cleaned or replaced and the compressor
checked more thoroughly paying special attention to the air induction system, oil supply and return system, and proper
cooling. If necessary, repair or replace the compressor. Check for proper belt and pulley alignment and belt tension.
Adjust if necessary paying special attention not to over tighten the belt tension.