freightliner MC - Wheel End Inspection

5. Place a turn-plate or turntable under both front
tires. Remove the safety stands from underneath
the axle, then lower the vehicle. Remove the
lockpins from the gauges; make sure that the
tires are pointing straight ahead.
NOTE: If turn-plates or turntables are not avail-
able, lower the vehicle. Remove the chocks
from the rear tires and release the parking
brake. Move the vehicle backward and then for-
ward about six feet (two meters).
6. Place a trammel bar at the rear of the front tires;
locate the trammel pointers at spindle height,
and adjust the pointers to line up with the scribe
lines on the center ribs of the front tires. See
Fig. 6. Lock the pointers in place. Check that the
scale is set to zero.
7. Place the trammel bar at the front of the tires
and adjust the scale end so that the pointers line
up with the scribe lines. See
Fig. 7 and Fig. 8.
8. Read the toe-in from the scale, and compare it to
the toe-in specification in Group 33 of the Recre-
ational Vehicle Chassis Workshop Manual,or
take the vehicle to an authorized Freightliner
dealer. If corrections are needed, see Group 33
of the Recreational Vehicle Chassis Workshop
Manual, or take the vehicle to an authorized
Freightliner dealer.
33–04 Wheel End Inspection
IMPORTANT: For ZF IFS axles, ZF recom-
mends that all grease fittings be lubricated once
a year, preferably before periods of inactivity.
The wheel hub should be disassembled, in-
spected, and the wheel bearings repacked
every 1,000,000 miles (1 609 000 km).
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A
B
NOTE: B minus A equals toe-in.
Fig. 6, Wheel Toe-In (overhead view)
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Fig. 7, Trammel Bar Positioning
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Fig. 8, Setting Trammel Bar Pointers
Front Axle33
Recreational Vehicle Chassis Maintenance Manual, June 201533/4