2
DISASSEMBLY
1. Remove the discharge line from the discharge port of
the cylinder head and push the discharge line out of the
way.
2. Remove the governor or the air line from the governor
mounting pad on the head of the compressor. Remove
and discard the governor mounting gasket (9) if the
governor is mounted on the head.
3. Removetheinletttingorairstraineranddiscardthe
gasket (10).
4. Remove the inlet and outlet water lines after draining
the radiator.
5. Remove and retain the four hex head cap screws from
the head. Tap the head with a mallet to break the gasket
seal and remove the head. Remove the head gasket (12).
6. Before disassembling the discharge valve mechanism,
measure and record the discharge valve travel (from
closed to completely open). If the measured discharge
valve travel DOES NOT EXCEED .032 inches,
the discharge valve stop need not be removed. It
is recommended that the cylinder head assembly
be replaced if the discharge valve stop requires
replacement. Using a 9/16" Allen®wrench, remove
the discharge valve seat (14), valve (8), and valve
spring (11).
7. With a 3/16" Allen®wrench remove the unloader stop
and o-ring assembly (1 & 2). (Refer to the unloader kit
instruction sheet included in this kit).
8. Insert the lugs of a spanner wrench into the holes of
the inlet valve stop (5) and remove the inlet valve stop
along with the inlet valve spring (6), inlet valve (15),
valve seat (7), inlet valve gasket (13), and unloader
spring (16). (NOTE: Reference Williams®adjustable
face spanner #483.)
9. With a pair of needle nose pliers remove the unloader
piston and o-ring assembly (3 & 4).
10.Discard components 1 through 16.
CLEANING
Remove all carbon deposits, rust, and scale from all cavities
in the cylinder head. Use shop air to clear any loose particles
from these recesses. Scrape the gasket surfaces of the
head and the crankcase taking care not to allow foreign
material to fall into the cylinder.
INSPECTION
Inspect the inlet bushing and discharge valve stop for
excessive wear, nicks, and scratches. These surfaces
can be "dressed" with a lapping stone to improve their
condition.
GENERAL SAFETY GUIDELINES
WARNING! PLEASE READ AND
FOLLOW THESE INSTRUCTIONS
TO AVOID PERSONAL INJURY OR DEATH:
When working on or around a vehicle, the following
guidelines should be observed AT ALL TIMES:
▲Park the vehicle on a level surface, apply the parking
brakes and always block the wheels. Always wear personal
protection equipment.
▲Stop the engine and remove the 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.
▲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.
▲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 a Bendix®AD-IS®air dryer system, a Bendix®
DRM™dryer reservoir module, or a Bendix® AD-9si®air
dryer, be sure to drain the purge reservoir.
▲
Following the vehicle manufacturer’s recommended
procedures, deactivate the electrical system in a manner
that safely removes all electrical power from the vehicle
.
▲Never exceed manufacturer’s recommended pressures.
▲Never connect or disconnect a hose or line containing
pressure; it may whip and/or cause hazardous airborne
dust and dirt particles. Wear eye protection. Slowly open
connections with care, and verify that no pressure is
present. Never remove a component or plug unless you are
certain all system pressure has been depleted.
▲Use only genuine Bendix®brand replacement parts,
components and kits. Replacement hardware, tubing, hose,
fi ttings, wiring, etc. must be of equivalent size, type and
strength as original equipment and be designed specifi cally
for such applications and systems.
▲Components with stripped threads or damaged parts should
be replaced rather than repaired. Do not attempt repairs
requiring machining or welding unless specifi cally stated
and approved by the vehicle and component manufacturer.
▲Prior to returning the vehicle to service, make certain all
components and systems are restored to their proper
operating condition.
▲For vehicles with Automatic Traction Control (ATC), the ATC
function must be disabled (ATC indicator lamp should be
ON) prior to performing any vehicle maintenance where
one or more wheels on a drive axle are lifted off the ground
and moving.
▲The power MUST be temporarily disconnected from the
radar sensor whenever any tests USING A DYNAMOMETER
are conducted on a vehicle equipped with a Bendix®
Wingman®system.
▲You should consult the vehicle manufacturer's operating
and service manuals, and any related literature, in
conjunction with the Guidelines above.
