REPLACING THE DESICCANT
CARTRIDGE ON WABCO'S
SYSTEM SAVER HP AIR DRYER
SERVICE PARTS INSTRUCTIONS

2

Table of contents

Table of Contents
1

General Information ......................................................................................................................................... 4

2

Safety Information............................................................................................................................................ 6

3

How to Obtain Additional Maintenance, Service and Product Information ................................................ 7

4

How to Obtain Parts and Kits.......................................................................................................................... 7

5

Important Information ...................................................................................................................................... 7

6

Replacing the Desiccant Cartridge ................................................................................................................ 8

Edition 1
10.2018
TP18021 (en)

This publication is not subject to any update service.
You will find the current version on the internet at
http://www.wabco-na.com

3

General Information

1 General Information
Symbols used in this document

DANGER
Description of an immediate situation which will result in irreversible injury or death if the warning is
ignored.

WARNING
Description of a possible situation which may result in irreversible injury or death if the warning is
ignored.

CAUTION
Description of a possible situation which may result in irreversible injury if the warning is ignored.

NOTICE
Description of a possible situation which may result in material damage if the warning is ignored.
Important information, notes and/or tips

Reference to information on the internet

How to Obtain Additional Maintenance, Service and Product Information
If you have any questions about the material covered in this publication, or for more information about the
WABCO product line, please contact the WABCO Customer Care Center at 855-228-3203, by email at
[email protected], or visit our website: www.wabco-na.com.

4

General Information

WABCO Academy
https://www.wabco-academy.com/home/

WABCO online product catalog
http://inform.wabco-auto.com/

Your direct contact to WABCO
WABCO North America
WABCO USA LLC
1220 Pacific Drive
Auburn Hills, MI 48326
Customer Care Center: (855) 228-3203
www.wabco-na.com

5

Safety Information

2 Safety Information
Provisions for a safe work environment
 Only trained and qualified technicians may carry out work on the vehicle.
 Read this publication carefully.
 Follow all warnings, notices and instructions to avoid personal injury and property damage.
 Always abide by the vehicle manufacturer’s specifications and instructions.
 Observe all accident regulations of the respective company as well as regional and national regulations.
 The workplace should be dry, sufficiently lit and ventilated.
 Use personal protective equipment if required (safety shoes, protective goggles, respiratory protection
and ear protectors).
Read and observe all Danger, Warning and Caution hazard alert messages in this publication. They provide
information that can help prevent serious personal injury, damage to components, or both.

WARNING
To prevent serious eye injury, always wear safe eye protection when you perform vehicle
maintenance or service.

WARNING
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 or fall
over. Serious personal injury and damage to components can result.

WARNING
Release all air from the air systems before you remove any components. Pressurized air can cause
serious personal injury. Refer to the vehicle manufacturer’s service manual for instructions.

6

Important Information

3 How to Obtain Additional Maintenance, Service and
Product Information
Refer to Maintenance Manual MM1736, System Saver HP Air Dryer on www.wabco-na.com, for additional
information. If you have any questions about the material covered in this service parts instructions, or for
information about the WABCO product line, please contact the WABCO Customer Care Center at
855-228-3203 or visit our website: wabco-na.com.

4 How to Obtain Parts and Kits
Contact Meritor’s Commercial Vehicle Aftermarket at 888-725-9355 (US) or 800-387-3889 (Canada).

5 Important Information
The System Saver HP air dryer is available in both a coalescing and non-coalescing version. On the
coalescing version of the System Saver HP air dryer, there is a unique thread on the body that is only
compatible with a genuine WABCO coalescing cartridge which also includes a unique thread (see
replacement matrix). This ensures that the vehicles built with coalescing air dryers will always have a highquality coalescing cartridge for the best drying performance.
The WABCO coalescing cartridge with unique thread is backwards compatible with all WABCO air
dryers.

NOTICE
Use of a non-genuine WABCO coalescing cartridge can result in potential damage to the air dryer.
Coalescing Cartridge Replacement Matrix
AIR DRYER P/N

REPLACEMENT
CARTRIDGE P/N

432 480 141 0

R950068A

432 480 341 0

R950068A

7

Replacing the Desiccant Cartridge

6 Replacing the Desiccant Cartridge
A replacement kit contains one cartridge and one O-ring. Figure 1.
Fig. 1

4014139a

1. Loosen and remove the old cartridge. Use a strap wrench if necessary.
2. Remove and discard O-ring from dryer base.
If seats do not ensure a tight seal, replace the air dryer.

3. Inspect and clean seal seats. Repair any damage.
4. Lubricate and install the new O-ring on stem.
5. Thread the replacement cartridge onto the air dryer base until the seal touches the base. Tighten the
cartridge clockwise one additional turn. Do not overtighten. Figure 2.
Fig. 2

O-RING

SEAL

SEAL
SEAT
1002235a

8

Replacing the Desiccant Cartridge
Notes

9

(NYSE: WBC) is a leading global supplier of technologies and services that improve the
safety, efficiency and connectivity
of commercial vehicles. Originating from the Westinghouse Air
Brake Company founded nearly
150 years ago, WABCO continues to pioneer breakthrough innovations to enable autonomous
driving in the commercial vehicle
industry. Today, leading truck,
bus and trailer brands worldwide
rely on WABCO’s differentiating
technologies, including advanced

© 2018 WABCO North America – All Rights Reserved – TP18021 / 10.2018

driver assistance, braking, steering and stability control systems.
Powered by its vision for accidentfree driving and greener transportation solutions, WABCO is also
at the forefront of advanced fleet
management systems that contribute to commercial fleet efficiency.
In 2017, WABCO reported sales of
$3.3 billion and has nearly 15,000
employees in 40 countries. For
more information, visit

www.wabco-na.com