2
Component Removal and Installation
20
Meritor WABCO
Maintenance Manual 34 (Revised 03-16)
Figure 2.14
4.
Remove washer and O-rings from the base.
5.
Clean and inspect the valve bore. If the bore is damaged so
that a tight seal cannot be maintained, replace the air dryer.
6.
Apply a thin layer of grease to the valve bore and to all O-rings
(use the grease included with replacement kit).
7.
Install new washer and O-ring in dryer base and on valve head.
NOTE:
Lip on washer must face piston seat. Figure 2.15.
8.
Assemble the piston assembly,
앫
Install O-ring in groove on piston head.
앫
Install piston seat in groove on piston base.
앫
Install washer on piston.
Figure 2.15
9.
Install washer on piston assembly. Figure 2.16.
Figure 2.16
10. Install spring in valve head; fit valve head assembly into bore.
NOTE:
If shims are included in the replacement kit, they must
be installed above and below the spring. If they are not
included, they are not needed.
11. Install snap ring to hold the valve head in place.
NOTE:
Make sure the snap ring is fully seated or assembly will
leak from the purge valve.
Pressure-Controlled Check Valve (PCCV)
WARNING
Remove all air pressure from the tank before you remove the
pressure-controlled check valve. Pressurized air can cause
serious personal injury.
NOTE:
New style valves have the hex nipple pipe fitting
installed.
1.
Before replacing, look at the arrow on this valve. You must
install the valve so that the arrow faces the tank on which it is
installed. Figure 2.17.
Figure 2.14
Figure 2.15
1002174a
SPRING
VALVE HEAD
PISTON
ASSEMBLY
1002175b
LIP
Figure 2.16
100217
6a
Summary of Contents for 1200E
Page 4: ...Notes...
