Bendix Commercial Vehicle Systems AD-IS EVERFLOW - Manual (Page 10)

10
DELIVERY CHECK VALVE CLEANING PROCEDURE
(
Note: This is only required if system pressure does not
build after temporary bypass is completed.)
Refer to Figure 6 throughout this procedure. Depressurize
the air brake system following the General Safety
Guidelines outlined on page 2 in this document. Also,
always depressurize the air dryer purge reservoir before
servicing the air dryer.
This procedure does not require removal of the Bendix
®
AD-IS ® air dryer from the vehicle.
1. Remove the line from governor and mark for easy
reinstallation.
2. Remove the bolts attaching the governor to the AD-IS ®
air dryer and retain for reassembly.
3. Remove the governor from the air dryer. Be aware that
a short puff of trapped air may vent when the governor is
removed. Retain the governor gasket for reassembly if
a new governor gasket is not available. Remove and
retain the o-ring from the adapter.
4. The spring/delivery check valve can now be removed.
A second delivery check valve is located in the dryer
without a governor. This check valve is located behind
a hex head plug near the control line from the Bendix ®
EverFlow ® electronic module to the air dryer. Carefully
remove the hex plug and follow the instructions that
follow.
5. Remove and retain the o-ring from the check valve
body.
CLEANING & INSPECTION
Consult the service data sheet for the dryer used in your
AD-IS ® EverFlow ® assembly. The service data sheet
contains information useful for maintenance and service
of the air dryers.
CLEANING & INSPECTION
1. Use a suitable solvent to clean all metal parts, and
use a cotton swab to clean the bore (Note: Do not use
abrasives or tools to clean the bore: any scratches
caused may necessitate replacing the AD-IS air
dryer and reservoir system.) Superficial external
corrosion and/or pitting is acceptable.
2. Clean the o-rings with a clean dry cloth. Do not use
solvents.
3. Inspect for physical damage to the bore and the check
valve seat. If the bore is damaged (by scratches
etc., that would prevent the delivery check valve from
seating), replace the AD-IS air dryer.
4. Inspect the delivery check valve, o-rings, etc. for wear or
damage. Replace, if necessary, using the check valve
replacement kit available at any authorized Bendix parts
outlets.
5. Inspect all air line fittings for corrosion and replace as
necessary.
FIGURE 6 - BENDIX ® AD-IS ® AIR DRYER DELIVERY CHECK VALVE
GOVERNOR GASKET
(SPECIAL GASKET,
SEE NOTE 6)
GOVERNOR
(NON-ADJUSTABLE,
130 PSI CUT-OUT)
BOLTS
ADAPTER
LARGE
O-RING
SPRING
CHECK VALVE
BODY
SMALL
O-RING