Chevrolet 10 series 1973, Руководство по капитальному ремонту

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A U T O M A T IC T R A N S M IS S I O N 7A-11
be removed using Tool J-9557 (and Handle J-7079) and
reinstalled using Tool J-6582, pressing or driving the
bushing in from the front of the support.
Clutch Drum
Disassembly
CAUTION:
When working with the clutch
drum, use extreme care that the machined face
on the front of the drum (fig. 20PG) not be
scratched, scored, nicked or otherwise damaged
during any of the following service operations.
This machined face must be protected whenever
it must be brought to bear on a press or tool of
any sort.
1. Remove retainer ring and low sun gear and clutch
flange assembly from the clutch drum.
2. Remove the hub rear thrust washer.
3. Lift out the clutch hub, then remove the clutch pack
and the hub front washer.
4. Remove the spring retainer using J-9542 as shown
in Figure 20PG, or if using an arbor press, use
J-5133 and J-7782 adapter ring. Compress the
springs far enough to allow removal of the retainer
snap ring; then, releasing pressure on the springs,
remove the retainer and the springs.
NOTE: When using J-9542, place a piece of
cloth or cardboard between the tool and the
front side of the clutch drum as protection
for the machined face.
5. Lift up on the piston with a twisting motion to
remove from the drum, then remove the inner and
outer seals.
Inspection
1. Wash all parts in cleaning solvent (air dry).
CAUTION:
Do not use rags to dry parts.
2. Check drum bushing for scoring or excessive wear.
3. Check the steel ball in the clutch drum that acts as a
relief valve. Be sure that it is free to move in the
hole and that the orifice leading to the front of the
drum is open. If the clutch relief valve check ball in
the clutch drum is loose enough to come out or not
loose enough to rattle, replace the clutch drum as an
assembly. Replacement or restaking of the ball
should not be attempted.
4. Check fit of clutch flange in drum slots. There
should be no appreciable radial play between these
two parts. Also check low sun gear for nicks or
burrs and bushing for wear.
5. Check clutch plates for burning and wear.
Bushing Replacement (Fig. 21PG)
1. Remove the old bushing with Tool J-9546 using
care not to damage the bushing bore or the
machined face on the front of the clutch drum.
2. Use the same tool to install the new bushing. Press
(do not hammer) the bushing into the clutch drum
from the machined face side of clutch drum. Tress
only far enough so that the tool meets the clutch
drum. Do not force the tool against the clutch drum
machined face.
Assembly
1. Install new piston inner seal in hub of clutch drum
with seal lip downward (toward front of
transmission).
2. Install a new piston seal in clutch piston. Seal lips
must be pointed toward the clutch drum (front of
transmission). Lubricate seals generously and install
piston in clutch drum with a twisting motion.
J-9542
R E M O V A L
J-9 5 4 6
C A U T IO N — U SE R A G
T O PRO TECT
M A C H IN E D FA CE C A U T IO N — D O N O T
P R E SS T O O L H A R D
A G A IN S T M A C H IN E D FA C E
Fig. 20PG -Rem oving Clutch Spring Retainer Snap Fig. 21PG -R em oving and In s ta llin g Clutch Drum
Ring Bushing
OVERHAUL M ANUAL