Bendix Commercial Vehicle Systems MV-2 CONTROL MODULE - Manual (Page 4)

4
BW1584 © 2004 Bendix Commercial Vehicle Systems LLC. All rights reserved. 3/2004 Printed in U.S.A.
DISASSEMBLY - Dual Circuit Supply Valve
1. The dual circuit supply valve is located in the tractor
control body. (The one from which the spool with the
yellow button has been removed.) Grasp the web in the
top of the valve spool (3) (Figure 2) with narrow nose
pliers, twist and pull valve spool out. The shuttle (4) should
also come out with the spool. Remove the shuttle return
spring (5) and o-rings (6), (7), (8) and (9).
CLEANING & INSPECTION
The non metallic components which comprise most of the
parts of the MV-2
™ module should not be immersed in
any solvent type cleaner. Old lubricant should be wiped
off parts to be reused and the bores of the body wiped out
with a clean dry cloth.
ASSEMBLY - Dual Circuit Supply Valve (Figure 2)
Lubricate o-rings, bore and sliding surfaces with silicone
lubricant Bendix 291126 BW-650-M Dow Corning 55-M.
1. Place the shuttle return spring (5) in the dual circuit
supply valve bore in the body.
2. Install o-rings (6) & (7) on the shuttle (4) and (8) & (9) on
the valve spool (3).
3. Insert the small end of the shuttle in the spool and insert
the assembly into the valve bore, flush with top of body.
The dual circuit supply valve spool is retained in the body
by the same cover plate which also retains the tractor
control (yellow button) spool.
ASSEMBLY - SPOOLS
If old spools are being used, the o-rings and all sliding
surfaces should be lubricated with Bendix BW-650-M Silicone
Lubricant (291126). If new service replacement spools are
being installed, they will be pre-lubricated.
1. Place cover plates over each plunger stem. The cover
plates are identical and are installed convex side up.
2. Place the red button on the longer spool (for trailer air
supply), matching the groove in the button with the tongue
in the cover plate (where applicable), and secure the
button with the button roll pin. Place the yellow button
on the shorter spool (for tractor air supply), matching
button and cover (where applicable) and securing with
button roll pin as before. If new service spools are used,
a new roll pin will be found in each spool package.
3. Insert the shorter spool assembly (yellow button) in the
tractor supply bore (housing with the dual supply valve).
If the entire valve assembly has been removed, position
the assembly so that the tractor control body housing is
at 3 o’clock. With the open bore (trailer supply) at 9
o’clock, rotate the button until wording on top-center is
horizontally readable. The stepped side of the cover plate
should be covering the dual supply valve. Secure the
plate with the four flat head Phillips screws; torque to 25
inch pounds. Insert the longer spool assembly (red
button) in the remaining bore. The stepped sides of the
cover plates should key with each other when the
remaining four flat head screws are torqued to 25 inch
pounds.
SERVICE TEST
Repeat the “Operating and Leakage Test”.
WARNING! 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.
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, fittings, etc. must be of equivalent
size, type and strength as original equipment and
be designed specifically 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
unless specifically stated and approved by the
vehicle and component manufacturer.
10. Prior to returning the vehicle to service, make
certain all components and systems are restored to
their proper operating condition.