TRANSMISSION AND CLUTCH
Manual Transmissions
Manual transmissions are designed so
that the internal parts operate in a bath
of oil circulated by the motion of gears
and shafts.
Service Intervals
For recommended types and brands
of all lubricants, see the transmission
manufacturer's Service Manual
AMBIENT TEMPERATURE RANGE
MODEL
RECOMMENDED LUBRICANT (See Note)
DEG. C
DEG. F
VISCOSITY
(SAE)
HD engine oil: API CE or CF-4.
Above -12
Above +10
50
Eaton-Fuller
Synthetic oil: Chevron RPM
Synthetic Transmission Fluid, or equal, meeting
MIL-L-2104D and Eaton PS-081 specifications.
Above -40
Above -40
50
NOTE
Do not use multi-viscosity or EP (extreme pressure) gear oil (e.g., axle oils) in transmissions. Multi-viscosity or EP oils
may damage components.
Standard Transmission Oil Level
NOTE
The vehicle must be parked on level
ground.
Maintain the oil level and check it
regularly. Oil should be up to bottom
of filler plug hole.
Clutch System Introduction
Free pedal is the distance the clutch
pedal moves by applying only slight
pressure. During free pedal the
release yoke in the transmission
moves until its bearing pads contact
the release bearing. This movement of
the release yoke is called free travel.
Thus, free pedal and free travel are
directly related to each other.
As the clutch pedal is depressed
further, with harder pressure, the
release yoke moves the release
bearing away from the engine. This
causes the clutch plate to release from
the driven disks in the clutch. This is
5-156
Y53-6060-1C1
(03/17)
5
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