1987 MAZDA 626 transaxle

INSPECTION AND REPAIR 7C
CONTROL VALVE BODY
Precaution
(1) Pay close attention when handling the control valve because it consists of the most precise and
delicate parts of the transaxle.
(2) Neatly arrange the removed parts in order to avoid mixing up similar parts.
(3) Disassemble the control valve assembly and thoroughly clean it when the clutch and/or brake
bands are burned, and/or when the automatic transaxle fluid is degenerated.
Disassembly
Disassemble in the sequence shown in the figure.
2.5—3.4 N m _ (25—35 cm-kg, (7) 22—30 in-lb)
2.5—3.4 N-m (25—35 cm-kg 22—30 in-lb)
. 2.5—3.4 N-m (25—35 cm-kg, 22—30 In-lb)
2.5—3.4 N-m (25—35 cm-kg, 22—30 in-lb)
5—7 N-m {50—70 cm-kg, 43—61 In-lb)
2.5—3.4 N-m (25—35 cm-kg, 22—30 in-lb)
2.5—3.4 N-m (25—35 cm-kg, 22—30 in-lb)
5—7 N-m (50—70 cm-kg, 43—61 in-lb)
^ - 3—4 N-m (30—40 cm-kg, 26—35 in-lb)
76G07C-201
1. Manual valve
2. Oil strainer
3. Lower body
4. Separator plate
5. Throttle relief ball and
spring
6. Orifice check valve and
spring
7. Sub-body
8. Orifice check valve
9. Side plate
10. Vacuum throttle valve
11. Spring
12. Throttle backup valve
13. Downshift valve
14. Spring
15. Side plate
16. Modifier valve
17. 2-3 shift valve
18. Spring
19. 2-3 shift plug
20.1-2 shift valve
21. Spring
22. Side plate
23. Spring
24. Second lock valve
25. Pressure regulator sleeve
26. Pressure regulator plug
27. Spring seat
28. Spring
29. Pressure regulator valve
30. Upper body
7C-75

INSPECTION AND REPAIR 7C
Disassembly note
Bearing outer race
Remove the bearing outer race with the SST.
Inspection
Check the following and replace any faulty parts.
1. Damaged bearing cover
2. Damaged or worn bushing
76G07C-223
Assembly
1. Press the bearing outer race into the cover.
2. Press the oil seal into the cover.
76G07C-224
BEARING HOUSING
Disassembly
Remove the bearing outer race with the SST.
Note
Install the bearing outer race during reassem-
bly of the transaxle to adjust the preload.
76G07C-225
Inspection
Check the following and replace any faulty parts.
1. Damaged bearing housing
2. Damaged bearing outer race
86U07B-351
7C-87

7C INSPECTION AND REPAIR
SIDE BEARING HOUSING
Disassembly
Disassemble in the sequence shown in the figure, referring to the disassembly note for specially marked
part.
1. Oil seal
2. Bearing outer
race
3. Adjust shim
4. O-ring
5. Side bearing
housing cover
76G07C-226
76G07C-227
Disassembly note
Bearing outer race
Remove the bearing outer race with the SST.
Note
Install the bearing outer race during reassem-
bly of the transaxle to adjust the preload.
Inspection
Check the following and replace any faulty parts.
1. Damaged side bearing housing cover
2. Damaged or worn bushing
Assembly
1. Press the oil seal into the cover with the SST.
76G07C-228
7C-88

ASSEMBLY 7C
ASSEMBLY
PRECAUTION
(1) The automatic transaxle consists of high-precision-finished parts, necessitating careful inspection
before assembly because even a small nick could cause fluid leakage or affect performance.
(2) Clean out oil holes and oil passages with compressed ajr, and check that there are no obstructions.
(3) Before assembly, apply ATF to each O-ring, seal ring, rotating part, and friction part.
(4) If the brake band or drive plates are replaced with new ones, soak them in ATF for at least 2 hours
before installing.
(5) Each seal gasket and O-ring must be replaced with a new one.
(6) Be sure to install all thrust bearings and races in the correct direction and position.
ASSEMBLY—STEP 1
Torque Specifications
19—26 N-m (1.9—2.6 m-kg, 14—19 ft-lb)
76G07C-229
7C-89

ASSEMBLY 7C
76G07C-238
76G07C-239
76G07C-240
(13) Remove the bearing housing and SST.
(14) Install the required shim(s) and press the
bearing race into the bearing housing with
a suitable pipe.
(15) Install the bearing housing.
Tightening torque:
19—26 N m (1.9—2.6 m-kg, 14—19 ft-lb)
(16) Check that the preload/pull scale reading
is within specification. If not within specifi-
cation return to step (3).
Preload: 0.03—0.9 N-m
(0.3—9.0 cm-kg, 0.26—7.81 in-lb)
Reading on pull scale:
0.3—9 N (0.03—0.9 kg, 0.066—1.98 lb)
(17) Remove the bearing housing and output
gear assembly.
2. Mount the side bearing housing to transaxle case
by gradually tightening the mounting bolts in a di-
agonal pattern.
Tightening torque:
19—26 N-m (1.9—2.6 m-kg, 14—19 ft-lb)
76G07C-241
7C-93

7C ASSEMBLY
3. Adjust the differential side bearing preload and select the adjust shim(s) as described below.
Note
To inspect and adjust the preload, use the SST shown below.
76G07C-242
(1) Remove the side bearing housing race and ad-
just shims from the transaxle case. (Refer to
page 7C—88.)
(2) Set the differential assembly into the convert-
er housing.
(3) Install the outer race removed in step (1) into
the SST; then set them on the differential as-
sembly.
Caution
Eliminate the gap by turning either A or B of
the selector.
7C-94

ASSEMBLY 7C
(4) Set the six SST in the positions shown.
83U07B-382
Note
Install the bolts in the positions shown in the
illustration above.
76G07C-244
(5) Set the transaxle case on the selectors.
(6) Tighten the SST (bolts) to the specified torque.
Tightening torque:
29—46 Nm (3.0—4.7 m-kg, 22—34 ft-lb)
76G07C-245
(7) Turn the SST (selector) to increase the clear-
ance (indicated by the arrow) with the SST
(bars), until it no longer turns.
Note
a )This is to seat the bearings.
b )To turn the SST (B), bend the bar as shown.
(8) Turn the selector in the opposite direction until
the preload is eliminated (gap is reduced).
83U07B-385
7C-95

7C ASSEMBLY
(9) Insert the SST through the oil seal hole of the
transaxle case and attach
it
to the pinion shaft.
(10) Mount the SST and pull scale or torque
wrench.
(11) Widen the clearance between A and B to ob-
tain the specified preload/pull scale reading.
Preload:
0.5 N-m (5 cm-kg, 4.3 in-lb)
Reading on pull scale: 5 N (0.5 kg, 1.1 lb)
Note
Read the preload when the differential starts
to turn.
(12) Measure the clearance between A and B.
(13) Add 0.15 mm (0.0059 in) to the measured
clearance, and select the shim(s) closest in
valve to that measurement.
76G07C-246

Thickness
of
shim
0.10
mm
(0.004
in)
0.12
mm
(0.005
in)
0.14
mm
(0.006
in)
0.16
mm
(0.0063
in)
0.18 mm (0.007
in)

0.20 mm (0.008
in)
0.50 mm (0.020
in)
0.70
mm
(0.028
in)
1.00 mm (0.039
in)
76G07C-247
Caution
a) Measure the clearance around the entire cir-
cumference, and select shims equivalent to
the maximum clearance.
b)The maximum allowable number of shims
is 3.
(14) Remove the transaxle case and selector.
(15) Install the required shim(s) and tap the bear-
ing race into the side bearing housing.
76G07C-248
7C-96