SERVICE MANUAL
DESCRIPTION
The clutch control linkage (Figure 1) consists of
a suspended clutch pedal connected by a rod to a relay
(bellcrank) which is, in turn, connected by another rod to
the clutch release shaft lever.
The clutch pedal and relay shaft pivot on low
friction bushings of non-metallic (Acetal) material.
Adjustments are provided to establish correct
initial settings and to compensate for wear of clutch disc
facings.
Fig. 1 Clutch Control Linkage (Typical)
1
Relay Assembly (Bellcrank)
2
Upper Control Rod
3
Pedal Stop
4
Return Spring
5
Pedal
6
Release Shaft Lever
7
Lower Control Rod
MAINTENANCE
LUBRICATION
Clutch control components (release bearing, release
shaft, relay shaft and linkage yoke pins) should be
lubricated at the intervals specified in the vehicle
Operator’s Manual and at the time of clutch or clutch
control linkage service.
For lubricant types, refer to LUBRICATION
section of the Service Manual.
Some clutches are equipped with prelubricated,
sealed release bearings which do not require periodic
lubrication.
INSPECTION
At the time of vehicle chassis lubrication, check
clutch pedal free travel. If free travel is less than the
specified dimension, make necessary adjustments (see
ADJUSTMENT).
At least once each year and in the event of
clutch service, inspect clutch control linkage for worn or
damaged parts. Worn yoke pins and yoke pin holes in
control rods and levers could affect linkage adjustment
and clutch operation. Replace any. worn or damaged
parts. When installing new parts, clutch linkage should
be lubricated and readjusted.
ADJUSTMENT
To assure correct clutch operation and long
service life of clutch components, the clutch and linkage
must be kept in proper adjustment.
Adjustment factors are clutch release bearing
clearance and clutch pedal free travel. Pedal free travel
is determined by release bearing clearance.
Adjustment
must
be
made
periodically
to
compensate for wear of clutch disc facings (as indicated
by reduction of pedal free travel) and at the time of clutch
or clutch control linkage service.
Adjustment procedures, which vary between
clutch types, are outlined on the following pages.
CTS-4050 - Page 3
