Bendix Commercial Vehicle Systems BA-921 COMPRESSOR_STD/CLOSED ROOM - Manual (Page 12)

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2. The compressor should remain unloaded for a minimum
of 5-10 minutes. If compressor cycling occurs more
frequently and service and supply system leakage is
within tolerance replace the compressor or repair the
compressor unloader system using a genuine Bendix
maintenance kit available from authorized Bendix parts
outlets.
COMPRESSOR REMOVAL & DISASSEMBLY
GENERAL
The following disassembly and assembly procedure is
presented for reference purposes and presupposes that
a rebuild or repair of the compressor is being undertaken.
Several maintenance kits are available and the instructions
provided with these parts and kits should be followed in
lieu of the instructions presented here.
MAINTENANCE KITS & SERVICE PARTS
Since the compressors have a different head and
crankcase design, be sure to only use replacement
parts specifi cally applicable.
Note: In particular, the heads and head gaskets are
not interchangeable between the two compressors
covered in this document.
Section 1: Standard Compressor
Cylinder Head Gasket Kit .......................................................5008558
Unloader Kit ...........................................................................5008557
Governor Adapter Kit .............................................................5008561
Compressor Seal Kit (crankcase) ...........................................5008559
Components and kits for Caterpillar Engines
CAT C7/C9 Cylinder Head Assembly Kit ...............................K023601
CAT C11/C13/C15/C18 Cylinder Head Assembly Kit ............K023600
CAT C7/C9 Inlet Check Valve .................................................801580
CAT C11/C13/C15/C18 Inlet Check Valve ...............................801592
CAT C7/C9 Engine Seal Kit....................................................5012367
CAT C11/C13/C15/C18 Engine Seal Kit .................................5012369
CAT ST-4 ™ Discharge Safety Valve (7/8"-14 thrd.) ...................801116
Components and kits for DDC Engines
DDC Inlet Check Valve ............................................................802192
DDC Series 60 Engine Seal Kit ..............................................5012371
DDC ST-4 ™ Discharge Safety Valve (M16-1.5 thrd.) .................800534
Section 2: Closed Room Compressor
Cylinder Head Gasket Kit .......................................................K022563
Unloader Kit ...........................................................................5008557
Governor Adapter Kit .............................................................5008561
DDC Series 60 Engine Seal Kit ..............................................5012371
DDC ST-4 ™ Discharge Safety Valve (M16-1.5 thrd.) .................800534
All components shown in Figures 15 and 16 with a key
number are available in kits and/or as individual service
parts.
IMPORTANT! PLEASE READ AND FOLLOW
THESE INSTRUCTIONS TO AVOID PERSONAL
INJURY OR DEATH:
When working on or around a vehicle, the following general
precautions should be observed at all times:
1. Park the vehicle on a level surface, apply the parking
brakes, and always block the wheels. Always wear
safety glasses. Where specifi cally directed, the
parking brakes may have to be released, and/or
spring brakes caged, and this will require that the
vehicle be prevented from moving by other means
for the duration of these tests/procedures.
2. Stop the engine and remove ignition key when
working under or around the vehicle. When
working in the engine compartment, the engine
should be shut off and the ignition key should be
removed. Where circumstances require that the
engine be in operation, EXTREME CAUTION should
be used to prevent personal injury resulting from
contact with moving, rotating, leaking, heated or
electrically charged components.
3. Do not attempt to install, remove, disassemble
or assemble a component until you have read
and thoroughly understand the recommended
procedures. Use only the proper tools and observe
all precautions pertaining to use of those tools.
4. If the work is being performed on the vehicle’s
air brake system, or any auxiliary pressurized air
systems, make certain to drain the air pressure from
all reservoirs before beginning ANY work on the
vehicle. If the vehicle is equipped with an AD-IS
®
air dryer system or a dryer reservoir module, be
sure to drain the purge reservoir.
5. Following the vehicle manufacturer’s recommended
procedures, deactivate the electrical system in a
manner that safely removes all electrical power
from the vehicle.
6. Never exceed manufacturer ’s recommended
pressures.
7. Never connect or disconnect a hose or line
containing pressure; it may whip. Never remove
a component or plug unless you are certain all
system pressure has been depleted.
8. Use only genuine Bendix ® replacement parts,
components and kits. Replacement hardware,
tubing, hose, fi ttings, etc. must be of equivalent
size, type and strength as original equipment and
be designed specifi cally for such applications and
systems.
9. Components with stripped threads or damaged
parts should be replaced rather than repaired. Do
not attempt repairs requiring machining or welding