BENDIX BA-921 COMPRESSOR-STD-CLOSED ROOM Servicegegevens
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BA-921BENDIX AIR POWER COMPRESSOR
CYLINDER HEAD
VALVE PLATE ASSY.
PISTON RINGS
PISTON
CRANKCASE AND
CYLINDER BLOCK
CRANKSHAFT
FIGURE 1 - BA-921 COMPRESSOR
DESCRIPTION
The function of the air compressor is to provide and main-
tain air under pressure to operate devices in the air brake
and/or auxiliary air systems. The BA-921 compressor is a
single cylinder reciprocating compressor with a rated dis-
placement of 15.8 cubic feet per minute at 1250 RPM.
The compressor consists of a water cooled cylinder head
and valve plate assembly and an air cooled integral
crankcase and cylinder block. The cylinder head is an
aluminum casting which contains the required air and water
ports as well as an unloader piston. The valve plate
assembly consists of laminated and brazed steel plates
which incorporate various valve openings and channels for
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BALANCE
PISTON
UNLOADER
PISTON
SPRING
CONNECTING
ROD
operation
UNLOADER
COVER
AIR INLET
PORT
CYLINDER
HEAD
VALVE PLATE
ASSEMBLY
CRANKCASE
(APPLICATION SPECIFIC)
conducting air and engine coolant into and out of the cylinder
head.
The discharge valves are part of the valve plate assembly.
The cylinder head, with the valve plate comprise a complete
cylinder head assembly.
The cast iron crankcase and cylinder block assembly, houses
the piston, connecting rod, crankshaft and related bearings.
The BA-921 crankcase cover is stamped with information
identifying the compressor model, customer piece number,
Bendix piece number and serial number. See figure 2.
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shooting
GOVERNOR
WATER
CONNECTION
PORT
DISCHARGE
PORT(2)
WATER
PORT
WATER
PORT
(MAY BE
DRILLED ON
SOME
MODELS)
CRANKCASE
COVER
OIL PORT