Western Star 47X 2020, Maintenance Manual

Page: 49 / 166

25–00 Safety Precautions
Safety Precautions in this section apply to all
procedures within this group.
DANGER
When working on the vehicle, shut down the en-
gine, set the parking brake, and chock the tires.
Before working under the vehicle, always place
jack stands under the frame rails to ensure the
vehicle cannot drop. Failure to follow these steps
could result in serious personal injury or death.
25–01 Clutch Release Bearing
Lubrication
The standard clutch release bearing is not sealed,
and requires lubrication. Lubricate the bearing, as
follows.
NOTE: On vehicles equipped with Detroit trans-
missions, the release bearing does not need to
be lubricated. On vehicles equipped with Eaton
Fuller UltraShift PLUS transmissions, lubricate
the release bearing every 50,000 miles (80,000
km) or 3 months.
1. Park the vehicle on a level surface, shut down
the engine, and set the parking brake. Chock the
tires.
2. Remove the clutch inspection plate to see the
release bearing while lubricating it. See
Fig. 1 .
3. Clean the grease fitting. On some vehicles a
lube tube will be used, and the fitting may be at
the 9-o’clock position on the left side of the bell-
housing (see
Fig. 2 ).
NOTICE
Do not over-lubricate the clutch release bearing.
Over-lubrication could contaminate the clutch in-
ternally, causing clutch slippage and premature
failure. Do not use chassis grease or multipurpose
lubricants.
4. Using a pressure-type grease gun, lubricate the
release bearing with NLGI Grade 3 grease until
excess grease purges from the rear of the re-
lease bearing (toward the transmission).
5. Install the clutch inspection plate.
25–02 Fluid Level Check,
Hydraulic Clutch Control
WARNING
Use only approved fluid (DOT 4 brake fluid) in the
hydraulic clutch control system. Do not mix differ-
ent types of brake fluid. The wrong fluid will dam-
age the rubber parts of the system, causing loss
of clutch function and the risk of serious personal
injury.
06/22/2007 f250662
Fig. 1, Typical Clutch Inspection Plate
05/07/2007 f250663
1
2
1. Grease Fitting 2. Left Engine Mount
Fig. 2, Typical Release Bearing Grease Fitting
Clutch
25
47X and 49X Maintenance Manual, August 2020
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