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25–01 Clutch Release Bearing
and Release Cross-Shaft
Lubricating
Clutch Release Bearing
CAUTION
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.
On clutches with a grease-type release bearing (see
Fig. 1), wipe the dirt from the grease fitting. Using a
pressure gun and high-temperature grease only, lu-
bricate the release bearing at the grease fitting until
the grease starts coming out of the fitting. Use only a
lithium-based grease that meets NLGI grade 1 or 2
specifications.
NOTE: On clutches with a sealed release bear-
ing, the release bearing is lubricated at the time
of manufacture and requires no additional
grease for the life of the bearing.
On Sachs hydraulic clutches, never lubricate the
release bearing. The release bearing is made of
plastic with a kind of embedded grease.
Clutch Release Cross-Shaft
The clutch release cross-shaft is equipped with two
grease fittings; one at each side of the transmission
clutch housing. Wipe the dirt from the grease fittings.
Using a pressure gun, lubricate the cross-shaft with
multipurpose chassis grease.
25–02 Clutch (Pull-Type)
Inspecting and
Adjusting
See Group 25 of the
Acterra
®
Workshop Manual
for
clutch (pull-type) inspection and adjustment.
25–03 Hydraulic Fluid Level
Checking
WARNING
Use only approved clutch hydraulic fluid (DOT 3
brake fluid) in the clutch hydraulic system. Do not
mix different types of brake fluid. The wrong fluid
will damage the rubber parts of the system, caus-
ing loss of clutch function and the risk of serious
personal injury.
CAUTION
Do not allow the fluid level in the reservoir to go
below the MIN line. If too much air enters, the hy-
draulic system will not operate correctly, and the
clutch could be damaged.
If the fluid level is below the MIN mark, fill the reser-
voir with DOT 3 brake fluid until the level reaches the
MAX mark. See Fig. 2.
25–04 Hydraulic Fluid
Replacing
Replace the clutch hydraulic fluid every two years to
ensure clutch function is reliable and correct. Use the
f250081a05/27/93
Fig. 1, Release Bearing Grease Fitting
Clutch 25
Acterra Maintenance Manual, September 2002 25/1