four washers, and two new Nylok nuts. Tighten
the two remaining Nylok nuts 17 to 24 lbf·ft (23
to 33 N·m). Install the bolt, two washers, and a
new Nylok nut in the upper mounting bracket
strap. Tighten the upper mounting bracket strap
Nylok nut 80 to 120 lbf·in (900 to 1360 N·cm).
18. Connect and tighten the three air lines. Connect
the harness connector to the heater and
thermostat assembly until the lock tab snaps in
place.
19. Start the engine, build the air pressure, and
check the air brake system for leaks. If any air
leaks are present, see Group 42 of the Business
Class® M2 Plus Workshop Manual for diagnosis
and repair information.
AD–IP
1. Park the vehicle on a level surface, apply the
parking brakes, and chock the tires.
2. Using a wrench or a socket, loosen the desiccant
cartridge bolt. Then separate the desiccant
cartridge from the end cover.
3. Pull the cartridge bolt out of the cover and
remove the cartridge.
WARNING
Do not attempt to disassemble the desiccant
cartridge assembly. Parts for the assembly are not
available and the cartridge contains a 150 lb
spring that cannot be mechanically caged.
Disassembly could release the spring, resulting in
personal injury.
4. Remove and discard both O-rings from the
cartridge bolt.
5. Using a clean rag, wipe clean the inside of the
end cover. Clean the cartridge bolt bore in the
end cover, and the sealing surfaces for the large-
and small-diameter desiccant cartridge sealing
rings.
6. Inspect the end cover for physical damage, then
inspect all air line fittings for corrosion; replace
as necessary.
7. Clean and inspect the bolt, paying attention to
the threads and O-ring grooves.
IMPORTANT: Use only the grease supplied with
Bendix replacement kits.
8. Lubricate the O-rings, bolt O-ring grooves,
sealing rings, and cartridge grooves. Lubricate
the end cover bore for the bolt.
9. Install both O-rings on the cartridge bolt, then,
using a twisting motion, insert the assembled
desiccant cartridge bolt in the end cover.
10. Install the desiccant cartridge on the end cover,
making sure the cartridge is properly seated and
flush on the end cover.
NOTE: It may be necessary to rotate the
cartridge slightly until the anti-rotation lugs are
properly aligned and allow the cartridge to rest
flush against the end cover.
11. Using a wrench or socket, tighten the desiccant
cartridge bolt 70 lbf·ft (95 N·m). Do not over-
torque.
12. Before placing the vehicle in service, perform the
test below.
12.1 Close all reservoir drain cocks.
12.2 Build system pressure to governor cut-
out, and note that the AD-IP air dryer
purges with an audible escape of air.
f420544a
1 & 9
2
3
4
5
6
7
8
09/20/94
Fig. 2, AD–9 End Cover to Housing Torque Pattern
Brakes 42
Business Class M2 Plus Maintenance Manual, 02/10/2023 42/3
To Next Page
Loading...
