freightliner Custom Classic MT45 2022, Руководство по обслуживанию

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followed by a slow flow of air lasting ap-
proximately 30 seconds.
10.4 Perform the checks in Maintenance Op-
eration 42–10 .
42–08 Air Dryer Check
IMPORTANT: Review the warranty policy before
performing any intrusive maintenance proce-
dures. An extended warranty may be voided if
intrusive maintenance is performed during this
period.
Because no two vehicles operate under identical
conditions, maintenance and maintenance intervals
will vary. Experience is a valuable guide in determin-
ing the best maintenance interval for any one particu-
lar operation.
Every six months:
1. Check for moisture in the air brake system by
opening reservoir drain valves and checking for
presence of water. If moisture is present, the
desiccant cartridge may require replacement;
however, the following conditions can also cause
water accumulation and should be considered
before replacing the desiccant:
•
An outside air source has been used to
charge the system. This air did not pass
through the drying bed.
•
Air usage is exceptionally high and not nor-
mal. This may be due to high air system
leakage.
•
In areas where more than a 30-degree
range of temperature occurs in one day,
small amounts of water can temporarily
accumulate in the air brake system due to
condensation. Under these conditions, the
presence of small amounts of moisture is
normal.
NOTE: A small amount of oil in the system is
normal and should not be considered as a rea-
son to replace the desiccant cartridge. Some oil
at the dryer exhaust is normal.
2. Visually check for physical damage, such as
chaffed or broken air and electrical lines and bro-
ken or missing parts.
3. Check the mounting bolts for tightness. See
Table 3 for torque values.
Torque Values
Vendor Size
Torque:
lbf·ft (N·m)
Bendix
Grade 5, 3/8–16 28 (38)
Grade 5, 5/8–11 135 (183)
Haldex 1/2–13 45 to 55 (61 to 75)
Table 3, Torque Values
4. Perform the operational and leakage tests listed
below.
01/10/2011 f422529
B
B A
A
A
A. Install the new cartridge into the canister.
B. Press the cartridge into the canister and rotate
clockwise 45 degrees to engage the cartridge.
Fig. 12, Cartridge Rotation and Engagement
Brakes
42
Walk-In Van Chassis Maintenance Manual, October 2019
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