STAMPED ANGLE SPRING CLUTCH
RECOMMENDED OPERATION AND
MAINTENANCE FOR LONG CLUTCH LIFE
Spicer clutches will last many thousands of miles if
properly installed, used and maintained They are
designed and built to withstand rugged use But re-
gardless of their strength and quality, their life
will be shortened if they are abused. EXCESS
FRICTION HEAT, A CLUTCHS
WORST ENEMY. Almost
every early fairlure of a
can be traced to excess
friction heat - all of which
can be prevented by
proper operation and
how: Do not "ride or
slip" the clutch. Once
a clutch is fully engaged,
there is no heat generated
and little or no wear However,
during the bref period when the clutch is picking up
the load, considerable heat is generated By riding or
slipping the clutch, the period of partial engagement is
lengthened - causing unncessary heat and wear.
Always start in the proper gear. Obviously, an empty
vehicle can be started In a higher gear than a fully
loaded one But starting In a gear too high for the load
can cause clutch slippage, too much heat and
unnecessary wear. Drivers should be trained to use a
gear low enough to prevent excess wear on the clutch.
A gear that will start the vehicle moving with the engine
at idle speed Is usually correct If the engine must be
revved up to prevent stalling, the gear selection is too
Do not shift until vehicle has reached proper speed.
Upshifting before the vehicle has reached the right
speed is almost as bad as starting off in too high a gear.
When the difference between the vehicle speed and the
engine speed is too great, the clutch is forced to slip.
The result is extra heat and wear.
Match the clutch to the vehicle and the Job.
Improper specification may result in a clutch too
light duty for the
job it must perform,
resulting In early burn-
out. It may be a
perfectly good clutch
when used in the
application for which
it was designed, but
for heavy duty use
Mismatching the clutch to the vehicle is not only bad for
the clutch, it can cause early wear on the whole drive
Never hold a vehicle on a hill with the clutch. To hold
a hill with the clutch requires that the clutch be purposely
to burn up
with the clutch
clutch failure by the
very high RPM
encountered when coasting in gear with
the clutch released. In this situation, the rear wheels are
driving the disc through the multiplication of the rear axle
and transmission ratios. This can result in over 10,000
RPM, beyond the burst strength of the facing material.
Something as simple as coasting down an unloading
ramp can burst a driven disc.
Never engage the clutch while coasting. This should
not even have to be said, since responsible drivers
should never coast with clutch disengaged. Re-
engaging a clutch after coasting causes
tremendous shock to the clutch and
the whole drive train. It can
result in internal
engine damage and/
or clutch and flywheel
failure. Always report un-
usual clutch operation
Proper maintenance, performed on time,
will greatly extend the life of the clutch.
The driver should report any change in
free pedal (free travel), slippage or any
strange "feel" to the clutch operation.
CTS-4195 Page 5