Installation - BENDIX AD-9 Service Data

6
4
1&9
7
FIGURE 13 - END COVER TO HOUSING TORQUE PATTERN
4. Install the assembled long check valve body, o-ring,
and spring in the end cover delivery check valve port
so that the o-ring rests on its seat in the end cover and
the spring is visible.
5. Install the delivery check valve plug that was removed
during the disassembly, into the air dryer end cover.
See Figure 5. Torque the plug to 130–170 inch pounds.
Drop In Air Dryer Makeup Line Assembly
1. Install the adapter and the attached 90 degree fi tting in
the air dryer. Take care that the replacement adapter
and attached fi tting is in the same approximate position
as the original. See Figure 11.
END
COVER
EXTRA
BRACKET
CAP SCREW
FIGURE 14 - LOWER BRACKET INSTALLATION
2
8
LOWER
BRACKET
SPECIAL
2-1/8"
WASHER
LONG
2. Install the check valve and fi tting, taking care that the
replacement is in the same approximate position as the
original.
3. Install the makeup line and tighten the tubing nuts at
both ends while preventing the 90 degree fi ttings from
5
turning. Tighten the nuts suffi ciently to prevent air
leakage, but do not over tighten.
Air Dryer Assembly
1. Install the desiccant cartridge o-ring in its groove in
the end cover. Using a light coat of lubricant (included
in kit), lubricate the bottom of the desiccant cartridge
in the area that will contact the o-ring and end cover.
Screw the desiccant cartridge into the end cover until
contact is made between it and the o-ring. Using a strap
or chain wrench positioned 2–3 inches from the bottom
3
of the cartridge, turn the desiccant cartridge clockwise
180–225 degrees beyond the position where initial
contact was made between the cartridge and end cover
o-ring. Torque should not exceed 50 ft. lbs.
2. Install the end cover outer housing o-ring on the
shoulder in the end cover. Place the housing over the
desiccant cartridge and align the holes. Install the six
3/8" cap screws, locknuts and twelve special washers,
making certain they are in the proper position as marked
during disassembly. The two longer 3/8" cap screws will
be used to secure the air dryer to its mounting bracket.
Tighten the six cap screws and nuts in a star pattern
in a fashion similar to Figure 13; depending on lower
bracket location. Torque to 270–385 in. lbs.
Note: The two remaining bolt holes in the end cover and
two 3/8" cap screws must be the ones marked during
disassembly to assure proper orientation of the ports
and adequate length of the cap screws.

INSTALLATION

1. Install the assembled Bendix
dryer back onto the vehicle by slipping it into the upper
mounting bracket. Align the two unused holes in the end
cover with the bottom mounting bracket such that the
bottom bracket supports the air dryer. The air dryer end
cover should rest on the bracket. Using the remaining
two 3/8" cap screws, four special washers, and two
locknuts, secure the air dryer to the lower bracket.
Tighten, then torque the two remaining cap screws to
270–385 in. lbs. See Figure 14.
2. See Figure 7, illustrations A and B, to determine the
mounting bracket type.
Illustration A Style - Attach the mounting strap to the
air dryer and secure it to the mounting saddle with
the 5 /16" X 4-1/2" hex cap screw and nut. Torque to
80–120 in. lbs.
Illustration B Style - Place the isolator between the
upper bracket and air dryer. Secure the air dryer to
the upper bracket with the mounting strap. Tighten the
adjusting nut to 50–60 in. lbs.
® AD-9 ® or AD-9 ® IPC air
15