TP-03100

Revised 11-09

Trailer ABS In-Line Filter Valve

and Gladhands with Integral
Filters
Technical Bulletin
Revised
1TP-03100
Technical
11-09
Bulletin

Hazard Alert Messages In-Line Filter Valve

Read and observe all Warning and Caution hazard alert messages in
this publication. They provide information that can help prevent
Installation Guidelines
serious personal injury, damage to components, or both. For installation related to gladhands, refer to Gladhands with Integral
Filters.
WARNING Install the in-line filter valve in the air line before the brake valves in
To prevent serious eye injury, always wear safe eye protection the control line, or in both the control and supply lines as illustrated
when you perform vehicle maintenance or service. in Figure 1. The valve may also be nipple mounted to the gladhand.

Release all pressure from the air system before you

disconnect any components. Pressurized air can cause serious
personal injury.

Park the vehicle on a level surface. Block the wheels to

prevent the vehicle from moving. Support the vehicle with
safety stands. Do not work under a vehicle supported only by
jacks. Jacks can slip and fall over. Serious personal injury and
damage to components can result.
Figure 1

IN-LINE TYPICAL
FILTER VALVE TANDEM AXLE
TRAILER

CONTROL (BLUE)
FRONT OF
TRAILER

SERVICE/CONTROL LINES
SENSOR CABLES
SERVICE BRAKE
SUPPLY AIR

SUPPLY (RED)

IN-LINE NOTE: Spring brake

FILTER VALVE lines not shown. 4004077b

Figure 1
Mounting Requirements Maintenance Guidelines
Install the valve with the filter portion facing DOWNWARD so that the For complete maintenance and service instructions for Meritor
air line ports are horizontal. Figure 2. WABCO products, visit our website, www.meritorwabco.com.

Figure 2
If you require technical assistance, contact ArvinMeritor’s Customer
Service Center at 800-535-5560.
1/2" NPTF 1/2" NPTF
General Maintenance
AIR AIR
IN OUT Inspect and clean the internal filter screen every three to four
months, more frequently for severe applications where dirt and dust
levels may be excessive. Figure 4.
Filter portion
of valve must Figure 4

face DOWNWARD.
RETAINER
SLIDE 2" Required space 8
(50 MM)
for removal of
filter element. 1

3
RETAINER
SLIDE 4

3.5" 3.5" 7 4004079b

(90 MM) (90 MM)
1 IN-LINE FILTER VALVE BODY 5 SMALL SPRING
Required space for removal of 2 LARGE SPRING 6 O-RING
retainer slide. 4004078b 3 FILTER SCREEN 7 CAP
4 WASHER 8 RETAINER SLIDE
Figure 2
Figure 4

Allow sufficient clearance:

1. Remove the internal filter screen. Refer to the instructions in
앫 Minimum of 3.5 inches (90 mm) to release the retainer slide bar the Replacing Internal Components section.
앫 Minimum of two inches (50 mm) for removal and installation of 2. Use compressed air to clean dust and debris from the filter and
internal components other internal components, or wash with mild detergent and
water.
앫 Use 1/2-inch NPTF port fittings
3. Replace any damaged filter screens. If you are replacing only
Use a bracket and clamp to support the in-line filter valve. Figure 3. the filter screen, do not discard the large spring, washer, small
spring, cap or retainer slide. These are needed for reassembly.
Figure 3

Discard the filter screen and O-ring.

Replacing Internal Components

Removing Internal Components
1. Park the vehicle on a level surface and block the wheels to
prevent the vehicle from moving.
4004080b
2. Discharge all pressure from the air system.
Figure 3
3. Remove the retainer slide from the bottom of the in-line filter
valve. Hold one hand under the valve cavity to prevent the
internal components from dropping to the ground.

TP-03100
Revised 11-09 (16579/22882)
Page 2 Copyright ArvinMeritor, Inc., 2009 Printed in USA
4. Carefully remove the remaining components. If you are Figure 5

replacing only the filter screen, do not discard the large spring,
DETENT DETENT
washer, small spring, cap or retainer slide. These are needed
for reassembly. Discard the filter screen and O-ring. PAINTED
BLUE
5. Inspect and clean the valve bore and the internal components PAINTED
to be used for reassembly. If the bore is damaged so that a RED
tight seal cannot be maintained, replace the entire in-line filter
valve. CONTROL
GLADHAND
Installing Internal Components
Insert the clean internal components into the valve bore as follows: SUPPLY
GLADHAND 4007387a
앫 Large spring
Figure 5
앫 Filter screen
앫 Washer Part number 952 201 018 0 serves the supply air circuit. It is
painted RED. It is always mounted on the right side of the two
앫 Small spring connections as viewed facing the front of the trailer. The supply air
앫 O-ring line fills the air tank and releases the trailer park brakes when the
red trailer knob inside of the tractor’s cab is pushed. This action
앫 Cap
allows the trailer to be moved.
앫 Retainer slide Part number 952 201 019 0 serves the control air circuit. It is
painted BLUE. The operator applies air to the control line in one of
Removing the In-Line Filter Valve two ways: by depressing the brake pedal or by moving the hand
1. Park the vehicle on a level surface and block the wheels to control valve. Either of these actions actuates the trailer service
prevent the vehicle from moving. brakes.

2. Discharge all pressure from the air system. Installation Guidelines

3. Disconnect the air lines. Each gladhand has a female 1/2-inch NPTF threaded port. Figure 6.
4. Remove the in-line filter valve from its mounting location.
Figure 6

For assistance, contact Meritor WABCO at 800-535-5560. SUPPLY

GLADHAND

Gladhands with Integral Filters CONTROL

GLADHAND
All commercial trailers with air brakes have two connections at the
front of the trailer for control and supply air lines. Figure 5. The
couplings for these connections are called “gladhands.” While the PAINTED
right and left gladhands may look the same, they are not. They are RED
painted different colors for quick identification and they have
mechanical detents to prevent a mismatch when connecting the PAINTED
trailer to the cab. BLUE
1/2-INCH
NPTF
THREADS 4007386a

Figure 6

To install a gladhand:
1. Apply the recommended NPTF thread sealer to the nipple
threads. Apply SAE-standard, DOT-approved Teflon tape or
paste-type thread sealant to all pipe threads beyond the first two
threads. Pipes with pre-applied thread sealant may also be used.

TP-03100
(16579/22882) Revised 11-09
Printed in USA Copyright ArvinMeritor, Inc., 2009 Page 3
2. Assemble the gladhand on the air line nipple and hand tighten. 4. Remove the filter cap and spring.
3. Using a wrench, tighten the gladhand an additional 1-1/2 turns 5. Remove the filter screen and washer. If necessary, use a dowel
or until it is leak-free and positioned to permit the mating to gently press the filter out through the hole in the coupling
gladhand to be attached easily. side of the gladhand.
6. Clean the gladhand housing and loose parts using compressed
Maintenance Guidelines air or a mild detergent. Be careful to not allow loose dirt to
Inspect and clean the internal filter screen every three to four enter the threaded port area of the gladhand.
months, more frequently for severe applications where dirt and dust
7. Install the loose parts into the gladhand housing. Refer to
levels may be excessive. Figure 4.
Figure 7 for the order of components. Be sure that the washer
Gladhand Filter Maintenance is installed correctly. Note that the lip follows the side of the
filter screen. Figure 7, item 3.
1. Park the vehicle on a level surface and block the wheels to
prevent the vehicle from moving. 8. Press the filter cap and spring into the gladhand body. Using a
10 mm hex wrench, rotate the filter cap 1/4 turn to lock into
2. Discharge all pressure from the air system. place.
3. Using a 10 mm hex wrench, press and rotate the filter cap 1/4
turn (can be either CLOCKWISE or COUNTERCLOCKWISE). Replacing Internal Components
Figure 7. Individual replacement components are not available. Due to the
relatively low cost of a complete gladhand assembly with filter, the
Figure 7
assembly should be replaced when an individual part is worn or
damaged.

Removing the Gladhand with Integral Filter

1 1. Park the vehicle on a level surface and block the wheels to
prevent the vehicle from moving.
2. Discharge all pressure from the air system.
3. Disconnect the air lines.
2
4. Remove the in-line gladhand assembly from its mounting
3
location at the front of the trailer.
For assistance, contact Meritor WABCO at 800-535-5560.

5
4007988a

1 GLADHAND 4 SPRING
2 FILTER SCREEN 5 FILTER CAP
3 WASHER
Figure 7

Meritor WABCO Vehicle Control Systems Information contained in this publication was in effect at the time the publication was approved for printing and is subject to
2135 West Maple Road change without notice or liability. Meritor WABCO reserves the right to revise the information presented or to discontinue the
Troy, MI 48084-7121 USA production of parts described at any time.
800-535-5560
Copyright 2009 TP-03100
meritorwabco.com
ArvinMeritor, Inc. Revised 11-09
All Rights Reserved Printed in USA (16579/22882)