MAZDA 626 1987 Workshop Manual

INSPECTION AND REPAIR 7B
BEARING COVER ASSEMBLY
Disassembly
Disassemble in the sequence shown in the figure referring to the disassembly note for the specially
marked parts.
1. Oil seal
2. Bearing outer
race
3. O-ring
4. Bearing cover
86U07B-347
Disassembly note
Bearing outer race
Remove the bearing outer race with a pin punch and
hammer as shown.
Inspection
Check the following and replace any faulty parts.
1. Damaged bearing cover
2. Damaged or worn bushing
86U07B-348
Assembly
1. Press the bearing outer race into the cover.
2. Press the oil seal into the cover with the SST.
86U07B-349
7B—185

7B INSPECTION AND REPAIR
BEARING HOUSING
Disassembly
Remove the bearing outer race with a pin punch and
hammer.
Note
Install the bearing outer race during reassem-
bly of transaxle to adjust the preload.
86U07B-350
Inspection
Check the following and replace any faulty parts.
1. Damaged bearing housing
2. Damaged bearing outer race
86U07B-351
7B—186

ASSEMBLY 7B
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 air, 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, first 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
83U07B-365
11—14 N-m (110—140 cm-kg, 95—122 in-lb) 6-9 N-m (60—90 cm-kg, 52—78 in-lb)
8—11 N-m (80—110 cm-kg, 69—95 In-lb)
19—26 N m (1.9—2.6 m-kg, 14—19 ft-lb)
83U07B-366
7B—187

7B ASSEMBLY
Procedure
1. Adjust the preload of the output gear bearing and select the adjust shim(s) as described below.
Note To adjust the preload, use the SST shown below.
83U07B-367
83U07B-368
(1) Press the bearing cover in after aligning it with
guide bolts as shown.
Tightening torque: 11—14 N-m
(110—140 cm-kg, 95—122 in-lb)
(2) Install the converter housing onto the SST.
(3) Remove the bearing outer race and adjust
shims from the bearing housing. (Refer to page
7B—185)
(4) Mount the output gear assembly onto the con-
verter housing.
76G07B-171
7B-188

ASSEMBLY 7B
(5) Install the outer race removed in step (2) to the
SST; then mount them on the output gear as-
sembly.
Caution
Eliminate the gap (arrow) by turning A or B of
the selector.
76G07B-172
(6) Set the four SST on the converter housing in
the positions shown.
76G07B-173
(7) Set the bearing housing on the SST (selector)
and install the four SST (bolts); then tighten
them to the specified torque.
Tightening torque:
19—26
N
m (1.9—2.6 m-kg, 14—19 ft-lb)
76G07B-174
(8) Turn the SST (selector) to increase the clear-
ance indicated by the arrow with the SST (bars)
until it no longer turns.
Note
This is to seat the bearing.
(9) Turn the selector in the opposite direction un-
til the preload is eliminated (gap is reduced).
7B-189

7B ASSEMBLY
(10) Mount the SST and pull scale or torque
wrench on the output gear.
(11) Increase the clearance between A and B
to obtain the specified preload/pull scale
reading.
Preload: 0.5—0.9 N-m
(5.0—9.0 cm-kg, 4.34—7.81 in-lb)
Reading on pull scale: 5—9 N
(0.5—0.9 kg, 1.1—1.98 lb)
76G07B-176
Note
Read the preload when the output gear starts
to turn.
83U07B-375
(12) Measure the clearance. Select adjust
shim(s) equivalent to the measured
clearance.

Thickness
of
shim
0.10 mm (0.004
in) j
0.18
mm
(0.007
in)
0.12
mm
(0.005
in) j
0.20 mm (0.008
in)
0.14
mm
(0.006
in) |
0.50 mm (0.020
in)

0.16
mm
(0.0063
in) |
76G07B-177
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 7.
83U07B-377
7B—190

ASSEMBLY 7B
(13) Remove the bearing housing and SST.
(14) Install the required shim(s) and press the
bearing race into the bearing housing with
the SST.
76G07B-178
2. Adjust the differential side bearing preload
Note
To inspect and adjust the preload, use
(15) Install the bearing housing.
Tightening torque:
19—26 Nm (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 (2).
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.
select the adjust shim(s) as described below.
SST shown below.
83U07B-380
7B—191

7B ASSEMBLY
76G07B-180
83U07B-382
(1) Remove the bearing outer race and adjust
shims from the transaxle case. (Refer to page
7B—106)
(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.
(4) Set the six SST in the positions shown.
Note
Install the bolts in the positions shown in the
illustration above.
83U07B-383
(5) Set the transaxle case on the selectors.
(6) Tighten the SST (bolts) to the specified torque.
Tightening torque:
37—52 N-m (3.8—5.3 m-kg, 27—38 ft-lb)
83U07B-384
7B-192

ASSEMBLY 7B
86U07B-371
86U07B-372
(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 un-
til the preload is eliminated (gap is reduced).
(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 0.3 mm (0.0118 in) to the measured
clearance, and select the shim(s) closest in
valve to that measurement.
76G07B-224

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)
86U07B-374
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.
7B—193

7B ASSEMBLY
83U07B-389
83U07B-390
83U07B-391
(14) Remove the transaxle case and selector.
(15) Install the required shim(s) and tap the bear-
ing race into the transaxle case.
(16) Install the transaxle case.
Tightening torque:
37—52 Nm (3.8—5.3 m-kg, 27—38 ft-lb)
(17) Check that the preload is within specification.
If not within specification, return to step (2).
Preload: 2.9—3.9 N-m
(30—40 cm-kg, 26—35 in-lb)
Reading on pull scale: 29—39 N
(3.0—4.0 kg, 6.6—8.8 lb)
(18) Remove the transaxle case and differential as-
sembly.
3. Install the idle gear and output gear as an assem-
bly by tapping in with a plastic hammer.
4. Install the bearing housing.
(1) Install the bearing housing on the converter
housing.
Tightening torque:
19—26 N-m (1.9—2.6 m-kg, 14—19 ft-lb)
(2) Align the groove on the idle shaft with the
matching mark on the bearing housing.
(3) Tap the roll pin in with a pin punch and
hammer.
83U07B-392
7B—194