Bendix Commercial Vehicle Systems BENDIX 720CC COMPRESSOR - Manual (Page 3)

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are part of the valve plate assembly. The inlet reed valve/
gasket is installed between the valve plate assembly and
the top of the crankcase.
The cast iron crankcase has a water jacket to assist in the
cooling of the cylinder bore. The crankcase has an open
side with a machined face and locating pins. This open face
is bolted directly to the side of the engine block. Refer to
Figure 3.
The compressor gear engages the engine drive gear.
In addition, the crankcase houses the piston assembly,
connecting rod, crankshaft and related bearings. O-rings
are located in the countersunk holes (one each side) on
the crankcase deck to prevent coolant leakage between
the crankcase and valve plate coolant passage.
The Bendix ® 720cc compressor is equipped with a safety
valve to protect the compressor head in the event of, for
example, a discharge line blockage downstream of the
compressor. Excessive air pressure will cause the safety
valve to unseat, release air pressure, and give an audible
alert to the operator. The safety valve is installed in the
cylinder head safety valve port, directly connected to the
cylinder head discharge port.
A nameplate is attached to a flat cast face on the side of
the crankcase. It is stamped with information identifying the
compressor model, customer piece number, compressor
assembly part number and serial number. See Figure 2.
FIGURE 3 - BENDIX ® 720
CC
TWIN CYLINDER COMPRESSOR
Compressor to
engine block
mounting face
Oil drain locations
Safety
Valve
Cooling
Plate
Valve Plate
Assembly
Cylinder
Head
Crankcase
Drive Gear
Nameplate
Piston
Crankshaft
Mounting
Face
Connecting
Rod