IMPORTANT: Wheel covers decrease drag force
as a vehicle moves, thereby improving fuel effi-
ciency. If replacement of a wheel cover is nec-
essary, the replacement cover must meet or ex-
ceed the drag reduction performance of the
originally installed cover in order to maintain
compliance with greenhouse gas and fuel effi-
ciency regulations.
1.
If the vehicle was originally equipped with wheel
covers, ensure all wheel covers are present. In-
spect wheel covers for damage or wear. Remove
wheel covers from rear drive wheels, if equipped,
prior to inspecting the tires and wheel compo-
nents.
NOTE: During wheel cover installation, ensure
the V-notch in the liner inner retaining ring is
centered on the valve stem. The inner and outer
retaining rings should be uniformly aligned to
each other and to the wheel rim. The outer re-
taining ring of the liner is equipped with two
canvas flaps. When installing the face cover,
make sure the cover retaining ring is inserted
between the two canvas flaps on the liner outer
retaining ring so that the Velcro strips line up
between the face cover and the liner. Make cer-
tain the detachable view cover is centered on
the face cover, and the Velcro strips are
pressed firmly in place.
2.
Inspect each tire for the following:
•
valve stem caps on every tire, screwed on
finger-tight
•
bulges, cracks, cuts, and penetrations
•
oil contamination (petroleum derivatives will
soften the rubber and destroy the tire)
•
tread depth—if tread is less than 4/32 inch
(3 mm) on any front tire, or less than 2/32
inch (1.5 mm) on any rear tire, replace the
tire
•
debris lodged between dual tire sets
f42139702/03/2017
1
2
3
4
5
6
7
8
9
A
1. Clevis
2. Slack Adjuster
3. Clevis Pin
4. Manual Adjusting Nut
5. Control Arm
6. Control-Arm Washers
and Nut
7. Anchor Strap Slot
8. Anchor Strap
9. Brake Chamber
Fig. 25.2, Haldex Automatic Slack Adjuster
f42253005/05/2017
1
2
3
4
5
6
7
8
9
10
1. Grease Fitting (if
equipped)
2. Slack Adjuster
Housing
3. Brake Chamber
Pushrod
4. Clevis
5. Clevis Pin (large)
6. Clevis Pin (small)
7. Actuator Rod
8. Boot
9. Manual Adjusting Nut
10. Camshaft Splines
Fig. 25.3, Meritor Automatic Slack Adjuster
Pre- and Post-Trip Inspections and Maintenance
25.2
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