Buick LeSabre 1965 Service Manual page 143

CLUTCH, S-M TRANSMISSIONS 45000 CLUTCH 4 - 7
4 - 5 45000 CLUTCH TROUBLE DIAGNOSIS (Cont'd.)
SYMPTOM AND PROBABLE CAUSE
GRABBING
a. Oil on facing or burned or glazed facings
b. Worn splines on clutch gear
c. Loose engine mountings
d. Warped pressure plate or flywheel
e. Burned or smeared resin on flywheel or
pressure plate
RATTLING-TRANSMISSION CLICK
a. Weak retracting springs
b. Throw-out fork loose on ball stud or in
bearing groove
c. Oil in driven plate damper
d. Driven plate damper spring failure
a.
b .
c.
d.
e.
a.
b .
c.
d.
THROW-OUT BEARING NOISE WITH CLUTCH FULLY
a. Improper adjustment
b. Throw-out bearing binding on transmission
bearing retainer
c. Insufficient tension between clutch fork
spring and ball stud
d. Fork improperly installed
e. Weak linkage return spring
NOISY
a. Worn throw-out bearing
b. Fork off ball stud (Heavy clicking)
PEDAL STAYS ON FLOOR WHEN DISENGAGED
a. Bind in linkage
b. Springs weak in pressure plate
c. Weak pedal return spring
HIGH PEDAL EFFORT
a. Bind in linkage
b. Driven plate worn
a.
b .
c.
d.
e.
a.
b .
a.
b .
c.
a.
b .
PROBABLE REMEDY
Install new disc
Replace transmission clutch gear
Tighten or replace mountings
Replace pressure plate or flywheel
Sand off if superficial, replace burned or
heat checked parts
Replace springs
Check ball stud and retaining spring and
replace if necessary
Replace driven disc
Replace driven disc
ENGAGED
Adjust linkage
Clean, relubricate, check for burrs, nicks,
etc.
Replace fork
Install properly
Replace spring
Replace bearing
Install properly and lubricate fork fingers
at bearing
Lubricate and free up linkage
Replace
Replace
Lubricate and free up linkage
Replace driven plate