operators_manual

Mechanical Clutch
The clutch in this vehicle is actuated via a
combination of mechanical linkages from
the cab to the transmission.
Free Pedal Travel
Free pedal travel 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
called release travel. And finally, as the
pedal is pushed to the last 1/2 to 1 inch of
travel, the release bearing contacts and
engages the clutch brake. This is called
clutch brake squeeze. When the clutch
wears, the release bearing gradually
moves toward the engine, decreasing free
pedal and free travel. When all free pedal
and free travel are gone, the clutch
requires adjustment. The clutch is adjusted
by turning an adjustment ring that is built
into the clutch. When the ring is turned, the
release bearing moves back toward the
transmission, restoring free pedal and
clutch free travel. Under normal clutch
wear this is the only adjustment needed.
Do not attempt to change any other
component.
Clutch Linkage
Have your authorized dealer service the
clutch according to the clutch
manufacturer’s service guidelines. This
vehicle is equipped with a rod and lever
mechanical clutch linkage. Lubricate each
pivot point on the clutch linkage. Replace
with the recommended fluid Component
Lubrication Index. Lubrication Specification
Chart on page 216
Clutch Adjustment
Clutch pedal free travel is usually 1 3/4 in.
to 2 in. (34 to 51 mm). This should be your
guide for determining whether your truck
needs clutch adjustment. Some vehicles
have automatic clutch adjustment. If yours
doesn’t have this feature, adjustment will
have to be done by a trained certified
mechanic. Have the adjustment done
before clutch pedal free travel is reduced to
the minimum allowable 1/2 in. (13 mm).
Clutch Adjustment
Under normal wear conditions, the clutch
will require periodic adjustment. See the
clutch manufacturer's Service Manual for
the proper adjustment procedures.
Specification Reference
Charts
MAINTENANCE - Mechanical Clutch
212 Y53-6096-1A1 (01/17)
5