BENDIX MV-2 CONTROL MODULE Manuale - Pagina 4

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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

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

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

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.

AVOID

vehicle

manufacturer's

replacement parts,

™