1987 MAZDA 626 Workshop Manual

INSPECTION AND REPAIR 7C
Piston
Remove the piston by blowing compressed air into
the fluid hole as shown.
76G07C-156
76G07C-157
76G07C-158
Inspection
Check the following and repair or replace any faulty
parts.
1. Drive and driven plates for damage or wear
Drive plate thickness
Standard: 1.6 mm (0.063 in)
Minimum: 1.4 mm (0.055 in)
2. Clutch piston for damage or cracks
3. Clutch drum for damage or deformation
4. Seal contact areas for damage
5. Check ball for leaking or sticking
6. Spring retainer for deformation
7. Broken or worn snap ring
8. Broken or weakened spring
Free length of spring:
26.2 mm (1.031 in)
Assembly
1. Apply ATF to the inner seal ring and install it into
the rear clutch drum.
2. Apply ATF to the outer seal ring, and install it onto
the piston.
3. Install the piston by pushing evenly around the cir-
cumference, being careful not to damage the seal
rings.
4. Install the return springs and spring retainer into
the piston.
76G07C-159
7C-63

7C INSPECTION AND REPAIR
5. Install the snap ring.
(1) Place the SST on the spring retainer and com-
press only enough to install the snap ring.
(2) Install the snap ring in the groove.
(3) Remove the SST.
76G07C-160
6. Install the dished plate with the beveled side fac-
ing the piston as shown; then install the drive and
driven plates.
Note
Installation order:
Driven-Drive-Driven-Drive-Driven-Drive-
Driven-Drive
7. Install the retaining plate with the step facing up-
ward; then install the snap ring.
76G07C-161
76G07C-162
7C-64
8. Check the rear clutch clearance.
(1) Measure the clearance between the snap ring
and retaining plate of the rear clutch with a feel-
er gauge.
Rear clutch clearance:
0.8—1.0 mm (0.031—0.039 in)
(2) If the clearance is not with in specification, ad-
just it by selecting a proper retaining plate.
Retaining plate sizes mm (in)
4.8 (0.189) 5.0 (0.197) 5.2 (0.205) I 5.4 (0.213)
5.6 (0.220) 5.8 (0.228) 6.0 (0.236) 6.2 (0.244)
9. Check the rear clutch operation.
(1) Assemble the front clutch, and rear clutch; then
set the clutch assembly onto the oil pump.
(2) Check the rear clutch operation by applying
compressed air through the fluid passage as
shown.
Air pressure:
392 kPa (4.0 kg/cm2, 57 psi) max.
Caution
Apply air for no more than 3 seconds.

INSPECTION AND REPAIR 7C
(3) Pour ATF into the rear clutch until the clutch
piston is fully submerged.
76G07C-164
(4) Check that no bubbles come from between the
piston and drum seal while applying com-
pressed air through the fluid passage shown.
Air pressure:
392 kPa (4.0 kg/cm2, 57 psi) max.
Caution
Apply air for no more than 3 Seconds
76G07C-165
REAR CLUTCH HUB
Disassembly
Disassemble in the sequence shown in the figure. 76G07C-166
1. Snap ring
2. Rear clutch hub
:
3;,
3. Internal gear
63U07B-124
7C—65

7C INSPECTION AND REPAIR
Inspection
Check the following and replace any faulty parts.
1. Broken or worn snap ring
2, Damaged or worn internal gear
76G07C-167
Assembly
1. Set the rear clutch hub into the internal gear.
Note
Align the splines of the rear clutch hub and
internal gear
2. Install the snap ring.
76G07C-168
DRUM HUB
Disassembly
Disassemble in the sequence shown in the figure, referring to the disassembly note for specially marked
part. 76G07C-169 1. Parking gear
spring
2. Parking gear
3. Snap ring
4. Internal gear
5. Drive hub
6. Pin
76G07C-170
7C-66

INSPECTION AND REPAIR 7C
76G07C-171
76G07C-172
76G07C-173
Disassembly note
Parking gear
Remove the parking gear from the drive hub by first
removing the parking gear spring by pushing in the
two pins which project from the internal gear.
Inspection
Check the following and replace any faulty parts.
1. Broken or worn snap ring
2. Damaged or worn gear
Assembly
1. Install the drive hub to the internal gear; then in-
stall the snap ring.
2. Install the parking gear onto the drive hub with the
step facing upward.
3. Apply petroleum jelly to the pins to secure them;
then install them into the drive hub.
76G07C-174
7C-67

7C INSPECTION AND REPAIR
4. Install the parking gear spring.
76G07C-175
ONE-WAY CLUTCH INNER RACE
Disassembly
Disassemble in the sequence shown in the figure. 76G07C-176
1. Snap ring
2. Planetary carrier
(Rear)
3. One-way clutch
inner race
63U07B-127
Inspection
Check the following and replace any faulty parts.
1. Broken or worn snap ring
2. Damaged or worn gear
3. Worn one-way clutch inner race
4. Rotation of pinion gear
76G07C-177
7C-68

INSPECTION AND REPAIR 7C
5. Clearance between the pinion washer and plane-
tary carrier
Clearance: 0.8 mm (0.031 in) max.
76G07C-178
Assembly
Install the rear planetary carrier into the one-way
clutch inner race; then install the snap ring.
76G07C-179
BAND SERVO
Disassemble in the sequence shown in the figure.
1. Return spring
2. Servo piston
3. Outer seal ring
4. Inner seal ring
5. Servo retainer
6. Seal ring
76G07C-180
7C—69

7C INSPECTION AND REPAIR
76G07C-181
Mr
76G07C-182
76G07C-183
Inspection
Check the following and replace any faulty parts.
1. Damaged or worn piston
2. Weakened return spring
Free length of spring:
FE engine: 48.0 mm (1.89 in)
F6 engine: 45.5 mm (1.79 in)
Assembly
1. Apply ATF to the inner and outer seal rings, and
install them onto the servo piston.
2. Apply ATF to the seal ring, and install it onto the
servo retainer.
3. Assemble the servo retainer and servo piston.
BRAKE BAND
Inspection
Check the following and replace any faulty part.
1. Damaged or worn brake band
76G07C-184
7C-70