BENDIX TW-4 Manual - Halaman 3

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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.

REMOVAL

Disconnect all air lines and remove the valve.

INSTALLATION

Place the valve handle through appropriate hole in the panel,

place the dial (if used) over handle and install the mounting

screws. Connect the air lines. Apply air pressure and check/

repair air leaks.

PREVENTIVE MAINTENANCE

Important: Review the Bendix Warranty Policy before

performing any intrusive maintenance procedures. A warranty

may be voided if intrusive maintenance is performed during

the warranty period.

No two vehicles operate under identical conditions, as a

result, maintenance intervals may vary. Experience is a

valuable guide in determining the best maintenance interval

for air brake system components. At a minimum the TW

valves should be inspected every 6 months or 1500 operating

hours, whichever comes first, for proper operation. Should

the TW valves not meet the elements of the operational tests

noted in this document, further investigation and service of

the valve may be required.

replacement parts,

DISASSEMBLY

Remove the operating handle or lever by driving the pin out

of the body and remove the lever, plunger and plunger spring.

Remove the o-ring seal from the plunger.

Remove the supply cap nut, inlet valve and spring. Remove

the o-ring from the supply cap nut.

CLEANING AND INSPECTION OF PARTS

Wipe all rubber parts clean. Clean the plastic and metal

parts in mineral spirits and dry thoroughly. Inspect all rubber

parts for wear or deterioration and replace where necessary.

Examine the inlet seat in the body if nicked or corroded.

Inspect all springs for cracks, distortion or corrosion and

replace if necessary.

ASSEMBLY

Prior to assembly lubricate the body bore, plunger, plunger

dome, o-rings, lever cam, lever pin, and cap nut threads

with Bendix barium base grease part number 246671.

1) Place inlet valve in body.

2) Place inlet valve spring on inlet valve.

3) Place o-ring on cap nut and install cap nut.

4) Install plunger spring into top of body.

5) Install o-ring seal on plunger and install plunger.

TW-1

, TW-3

& TW-6

™

Depress the plunger, place lever cam in slot in body, line up

holes in body with hole in lever and insert the pin. Support

the body and drive the pin in fully.

TW-4

™

& TW-5

™

CONTROL VALVES

Depress the plunger with button until hole in plunger lines

up with holes in body. Insert the pin, support body and drive

the pin in fully.

LEAKAGE TEST

Test the valve per instructions in the Service Checks section

of this document.

CONTROL VALVES