Specifications

3
FIGURE 6 - POLYURETHANE SPONGE STRAINER
DISCHARGE
VALVE
PISTON
STROKE
TO GOVERNOR
INTAKE
STRAINER
UNLOADER
PLUNGER
INLET VALVE
TO RESERVOIR
DISCHARGE
VALVE
PISTON
STROKE
TO GOVERNOR
INTAKE
STRAINER
UNLOADER
PLUNGER
INLET VALVE
TO RESERVOIR
DISCHARGE
VALVE
PISTON
STROKE
TO GOVERNOR
INTAKE
STRAINER
UNLOADER
PLUNGER
TO RESERVOIR
INLET VALVE
FIGURE 3 - INTAKE
FIGURE 4 - COMPRESSION
FIGURE 5 - UNLOADING
Lubrication
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 oil pressure.
Cooling
Air flowing through the engine compartment from the action
of the engine’s fan and the movement of the vehicle assists
in cooling the crankcase. Coolant flowing from the engine’s
cooling system through connecting lines enters the head
and passes through the head’s water jacket and back to
the engine. Proper cooling is important in maintaining
discharge air temperatures below the maximum 400°F
recommended.
PREVENTIVE MAINTENANCE
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.
POLYURETHANE SPONGE STRAINER EVERY
5000 MILES OR 150 OPERATING HOURS
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.