Western Star 47X 2020, Maintenance Manual

Page: 130 / 166

and apply Torque Seal (OPG F900 White) to the
cotter pin.
8. Remove the plunger from the valve. Using alco-
hol, clean the existing grease from the plunger.
Check the plunger for signs of wear or cracks.
Replace it if necessary.
9. Lubricate the plunger with barium grease (BW
246671).
10. Insert the plunger in the valve.
11. Install the brake pedal with the pivot pin.
12. Install a new roll pin and apply Torque Seal
(OPG F900 White) to the roll pin.
13. Install the brake valve assembly.
14. Test the brakes before returning the vehicle to
service.
42–10 WABCO System Saver
Air Dryer Desiccant
Cartridge Replacement
NOTE: The following instructions apply to the
System Saver 1200, 1200 Plus, and Twin air
dryers.
NOTICE
The WABCO System Saver air dryers can use ei-
ther a standard or oil coalescing desiccant car-
tridge. When replacing the desiccant cartridge, it
is very important to use the same type of car-
tridge that was originally installed on the dryer. Oil
coalescing cartridges can be used in any applica-
tion, but require more frequent service intervals
(every 1 to 2 years instead of every 2 to 3 years
for a standard cartridge). Do not replace an oil co-
alescing cartridge with a standard cartridge, as
this may result in contamination and malfunction-
ing of downstream air system components.
Refer to Fig. 9 for cartridge replacement.
1. Drain the air system.
f430405 11/01/2016
1
2
3
4
6
7
8
5
1. E-6 Foot Control Valve
2. Mounting Plate
3. Nut and Washer
4. Pivot Pin
5. Roll Pin
6. Roller
7. Roller Pin
8. Pedal
Fig. 8, Brake Pedal and Valve Assembly
f421292 10/07/2016
1
2
3
1. Seal
2. O-Ring
3. Air Dryer Base
Fig. 9, Desiccant Cartridge Replacement
Brakes
42
47X and 49X Maintenance Manual, August 2020
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