Appendix III
Special Applications
MM-34
Page 30
Revised 11-02
2.
Unscrew and remove the Econ valve from the
air dryer inlet port No. 1. Save fitting for
reinstallation.
3.
Install the replacement Econ valve.
O
Apply a good quality teflon paste pipe
sealant, like Loctite
®
PST 567, on male
threads of the replacement Econ valve.
4.
Reconnect the lines to the Econ valve at air
dryer inlet port (Port 1).
To replace the Econ valve assembly on Meritor
WABCO System Saver 1200E air dryers, follow
these instructions.
1.
Remove the Econ valve assembly.
A. Using a flare wrench, loosen the
compression nuts on each end of the
U-shaped tube.
Figures A.4 and A.5
.
B. Loosen and remove the restricted-flow nut
on the air dryer.
C. Remove the metal washer.
D. Using a wrench, loosen and remove the
Econ valve from the banjo fitting.
E. Remove the banjo fitting and metal
washer.
F.
Clean the valve surface area thoroughly
before replacement.
2.
Install the replacement Econ valve assembly.
A. Install the metal washer on the
restricted-flow nut.
B. Install the restricted-flow nut on the air
dryer.
C. Position the metal washer and banjo fitting
on the Econ valve port.
D. Loosely fit the U-shaped tube into the
banjo fitting and restricted-flow nut. Make
sure the tube is fully seated.
E. Install and hand-tighten the compression
nuts on each end of the U-shaped tube.
F.
Lubricate and install the O-ring on the
Econ valve.
G. Install the Econ valve into the banjo fitting.
H. Torque the Econ valve and all nuts to
specifications.
Figure A.4
METAL
WASHER
COMPRESSION
FEMALE
NUT
COMPRESSION
FEMALE
NUT
ECON
VALVE
METAL
WASHER
O-RING
TUBE
BANJO
FITTING
Figure A.5
ECON
VALVE
WASHER
TUBE
BANJO
FITTING
