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3

Slowly decrease pressure in the control cavity and note at
what pressure delivery is made and compare with vehicle
manual.

NOTE: In the TR-3

 valve shown in Figure 3 and the TR-4

valve in Figure 4, control pressure is reduced by
decreasing supply air pressure because of the
internal passage connecting supply and control.

If the TR-2

, TR-3

 or TR-4

 inversion valve does not function

as described or leakage is excessive, it is recommended
that it be replaced with a new valve or remanufactured unit,
or repaired with genuine Bendix parts available at Bendix
outlets.

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.

FIGURE 4 - TR-4

 INVERSION VALVE

COVER

LEVER

1/4” P.T.

DELIVERY

LOCK NUT

O-RING

VALVE

SPRING

O-RING

INLET/EXHAUST

VALVE

PLUNGER

PIN

PLUGGED

VALVE STOP

SHIM

PLUNGER SPRING

1/4” P.T. SUPPLY

COVER NUT

CAP

PISTON SPRING

PISTON

O-RING

Summary of Contents for TR-2-TR-3-TR-4 INVERSION VALVE

Page 1: ...2 valve but with a die cast body Referring to Figure 3 some TR 3 valve s have an internal passage in the body connecting supply pressure to control The external control port is permanently plugged in such valves TR 4 INVERSION VALVE Referring to Figure 4 the TR 4 valve is a TR 3 valve with the internal passage connecting supply and control plus a manual lever control which permits the valve to be ...

Page 2: ...ance procedures Awarranty 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 inversion valves should be inspected every 6 months or 1500 operating hours ...

Page 3: ... 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 rese...

Page 4: ...n BW1581 2004 Bendix Commercial Vehicle Systems LLC All rights reserved 4 2004 Printed in U S A ASSEMBLY Before assembling the valve lubricate the piston o rings and body bores with Bendix silicone lubricant such as BW650M Bendix Pc No 291126 TR 2 INVERSION VALVE 1 Install the piston grommets on piston 2 Install the piston with grommets in valve body 3 Position the piston springs cover plate and r...

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