Chevrolet 10 Series 1970, Руководство по обслуживанию

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CLUTCHES AND TRANSMISSIONS 7-10
F ig . 16—G a u g in g Shim R equirem ent
2. Check clutch retra ctin g springs fo r p ro p er retention
of p ressu re plate to diaphragm spring, rep la ce if
n ecessary. T h is can be done without rem ovin g clutch
fro m veh icle.
3. If Steps 1 and 2 do not cure trouble, check p ressu re
plate lift with dial indicator (fig . 16) as follow s:
a. W ith p ro p er linkage adjustment (and lash), z e ro
indicator with clutch fu lly engaged (pedal up).
b. M easure p re s s u re plate lift at 3 strap bolt p o s i­
tions with fu ll pedal tra v e l.
NOTE: Use 5/8" thick board in place of flo o r
mat to give a p o sitive stop.
A ll three readings should be within .010" and
within total lift readings. If m ore than .010"
check retra ctin g sprin gs p er step 2. If trouble
s till exists, loosen clu tch -to -flyw h eel mounting
bolt at position of low est reading (le a v e other
bolts tight), p ry c o ver, away fro m flyw h eel, and
in s e rt fe e le r gauge (fig . 16) to determ in e thick­
ness of shim req u ired to b rin g reading within
.
010
".
T otal lift readings should be as follow s:
L -6 230 .065 to .075
HD 11" .065 to .085
Make sure p ro p er pedal lash adjustment is made be­
fo r e checking.
NOTE: E x c e s s iv e ly high readings indicate that
the diaphragm spring is being o v e r stre s s e d
which m ay eventually cause loss of load and
resu lt in slippage.
If above m easures fa il to c o r r e c t the trouble, check
d riven disc with clutch pedal dep ressed (it should spin
f r e e ly with tran sm ission in neutral). If it does not,
trouble may be:
1. M isalignm ent between p ilot bushing in crankshaft and
clutch housing.
2. Faulty clutch p ilot bushing.
3. Faulty driven disc.
4. Im p rop er sla ve cylin d er adjustment.
SERVICE OPERATIONS
CLUTCH ASSEMBLY
R em oval From Vehicle
1. R em ove tran sm ission as outlined in "T r a n s m is s io n
Section.”
2. Disconnect sla ve cylin d er fro m clutch fork .
3. R em ove clutch throwout b earin g fro m the fork.
4. R em ove clutch fo rk by p ressin g it away fro m its b all
mounting with a s c re w d riv e r, until the fo rk snaps
loose fro m the b a ll o r rem o ve b a ll stud fro m re a r of
clutch housing.
NOTE: The re ta in e r m ay be rem oved fro m the
fo rk by p ryin g out with a sm a ll s c re w d riv e r.
5. Install T o o l J-5824 to support the clutch assem bly
during rem oval.
6. Loosen the clutch attaching bolts one turn at a tim e
to p reven t distortion of clutch c o v e r until dia­
phragm spring is relea sed .
7. R em ove clutch p ilot to o l and rem ove clutch assem bly
fro m veh icle.
Installation to Vehicle
1. Install the p ressu re plate in the c o v e r assem bly lin ­
ing up the notch m ark on p ressu re plate with notch
m ark on flange of c o ver.
2. In stall p ressu re plate retra c tin g springs and d rive
strap to p ressu re plate bolts and lockw ashers and
tighten to 11 ft. lbs. torque. The clutch is now ready
to be in stalled.
F ig . 17— L u b ric a tio n Points on C lu tc h Throw out
COAT THIS GROOVE
PACK
THIS
RECESS
CHEVROLET TRUCK SERVICE MANUAL