freightliner PE116DC, Maintenance Manual

Page: 115 / 164

17. Install the air dryer on the lower mounting
bracket. Install the two previously marked bolts,
four washers, and two new Nylok nuts. Torque
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. Torque 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 thermo-
stat 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 vehicle
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 car-
tridge from the end cover.
3. Pull the cartridge bolt out of the cover and re-
move the cartridge.
WARNING
Do not attempt to disassemble the desiccant car-
tridge assembly. Parts for the assembly are not
available and the cartridge contains a 150 lb
spring that cannot be mechanically caged. Disas-
sembly could release the spring, resulting in per-
sonal injury.
4. Remove and discard both O-rings from the car-
tridge 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, seal-
ing 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 car-
tridge 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
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New Cascadia Maintenance Manual, January 2020
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