MM-34
Revised 11-02
Page 1
Section 1
Introduction
System Overview
Maintenance Manual 34 contains troubleshooting
steps and service information for the Meritor
WABCO System Saver Series (1000, 1200 and
1800) single cartridge air dryers.
NOTE:
If you have a System Saver TWIN air dryer,
use Maintenance Manual 35.
Air Dryer Documentation
TP-92116, Installing the Meritor WABCO System
Saver Series Air Dryer, provides complete
installation instructions.
PB-96134 contains a complete listing of air dryer
replacement parts.
TP-97101 is a troubleshooting guide. There is also
a poster-sized troubleshooting guide, TP-9772,
available.
TP-9672, Air Dryer Application Guide, provides
an in-depth look at System Saver Series air
dryer applications.
T-20102V, Air System Troubleshooting video
Stopping With Air and T-97105V, System Saver
1200 videotapes are also available.
To order literature, contact ArvinMeritor’s
Customer Service Center, 800-535-5560.
Air Dryer Identification
Alphabetical designations of the System Saver
Series family of air dryers have specific meanings:
P
Indicates an external purge tank is used for
desiccant regeneration
U
Indicates discharge line — unloaded
compressor
E
Indicates a Holset style compressor function
G
Indicates integral governor for air compressor
control
UP Indicates discharge line — unloaded
compressor (with external purge tank)
System Saver 1200/1800:
System regeneration
valve assembly on side of dryer
System Saver 1200E:
Tubing and banjo fitting at
front of dryer
System Saver 1200P/1800P:
Uses dedicated purge
tank. Port 22 drilled and tapped
System Saver 1200U/1800U:
Small regeneration
hole visible in back of Port 1 when fitting is
removed. No spring in turbo cut-off valve
assembly.
System Saver 1200UP/1800UP:
Port 22 drilled and
tapped. Small regeneration hole visible at back of
Port 1 when fitting is removed. No spring in turbo
cut-off valve assembly. Dedicated purge tank.
The air dryer base is the same for both the 1200
and 1800 Series air dryers, however the 1800
Series canister is 3.2 inches taller than the 1200.
This larger canister contains 50% more desiccant,
which makes the 1800 ideal for applications calling
for frequent starts, stops and long compressor
cycles. System Saver 1200 and System Saver 1800
Series air dryers are illustrated in
Figure 1.1
.
System Saver 1200P and System Saver 1800P,
which are used with a dedicated purge tank, are
illustrated in
Figure 1.2
.
Figure 1.1
Figure 1.2
