freightliner Custom Classic MT45 2022, Руководство по обслуживанию

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7. Install the new cartridge into the canister. Align
the slots on the cartridge with the dimplets inside
the canister. Press the cartridge into the canister
and rotate clockwise 45 degrees to engage the
cartridge, as shown in
Fig. 12 .
8. Place a new O-ring on the aluminum housing.
9. Place the cartridge assembly on the air dryer
housing and install four new mounting bolts. Use
an alternating diagonal pattern and tighten the
bolts 35 to 40 lbf·ft (47 to 54 N·m).
10. Before placing the vehicle in service, perform the
test below.
10.1 Start the engine and build air pressure to
100 psi (690 kPa) and shut-off the en-
gine.
10.2 Check for air leaks at the inlet, outlet, and
canister assembly. Correct any leakage
problem.
10.3 Restart the engine and build-up pressure
to cut-out pressure. At cut-out pressure,
the air dryer purge valve opens and im-
mediately expels a large volume of air,
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1
2
3
1. O-ring
2. Cartridge
3. Mounting Bolts
Fig. 9, PURest Air Dryer Assembly
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B
B
A
A. Canister/cartridge assembly shown upside-down.
B. Rotate the cartridge counterclockwise 45 degrees to
release it from the canister.
Fig. 10, Releasing the Cartridge
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Fig. 11, New Cartridge with Rubber Spring
Brakes
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Walk-In Van Chassis Maintenance Manual, October 2019
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