Bendix Commercial Vehicle Systems TU-FLO 550 COMPRESSOR 6/08 - Manual (Page 5)

5
FIGURE 7 - LUBRICATION
OIL
INLET
2. Naturally aspirated Engine Air Cleaner - Compressor
inlet is connected to the engine air cleaner or the
vacuum side (engine air cleaner) of the supercharger
or turbocharger.
3. Pressurized induction - Compressor inlet is
connected to the pressure side of the supercharger or
turbocharger.
See the tabulated technical data on page 14 of this manual
for specifi c requirements for numbers 2 and 3 above.
If a previously unturbocharged compressor is being
turbocharged, it is recommended that the inlet cavity screen
(238948) be installed with an inlet gasket (291909) on both
sides of the screen.
WATER
IN
OR
(1 PORT
ONLY)
WATER
OUT
OR
(1 PORT
ONLY)
WATER OUT
WATER
OUT
WATER
IN
WATER
IN
FIGURE 8 - COOLING
For vehicles with accessories that are sensitive to small
amounts of oil, we recommend installation of a Bendix
®
PuraGuard ® QC ™ oil coalescing fi lter, designed to minimize
the amount of oil present.
LUBRICATION
The vehicle's engine provides a continuous supply of oil
to the compressor. Oil is routed from the engine to the
compressor oil inlet. An oil passage in the compressor
crankshaft allows oil to lubricate the connecting rod
crankshaft bearings. Connecting rod wrist pin bushings
and crankshaft ball bearings are spray lubricated. An oil
return line connected from the compressor drain outlet
to the vehicle engine crankcase allows for oil return. On
fl ange mounted models the oil drains back directly to the
engine through the mounting fl ange.
COOLING
Air fl owing through the engine compartment from the
action of the engine’s fan and the movement of the vehicle
assists in cooling the compressor. Coolant fl owing from
the engine’s cooling system through connecting lines
enters the head and passes through internal passages
in the cylinder head and is returned to the engine.
Proper cooling is important in maintaining discharge air
temperatures below the maximum recommended 400
degrees Fahrenheit.
Figure 8 illustrates the various approved coolant fl ow
connections. See the tabulated technical data in the back
of this manual for specifi c requirements.
AIR INDUCTION
There are three methods of providing clean air to the Tu-
Flo
® 550 compressor:
1. Naturally aspirated Local Air Strainer - Compressor
utilizes its own attached air strainer (polyurethane
sponge or pleated paper dry element).