1987 MAZDA 626 Workshop Manual

INSPECTION AND REPAIR 7B
Inspection
Check the following and replace any faulty parts.
1. Damaged or worn idle gear
2. Damaged or worn bearing
86U07B-340
Assembly
1. Press the bearing outer races in with the SST.
86U07B-341
86U07B-342
2. Install the idle gear bearing onto the idle shaft, then
install the idle gear, adjust shim, spacer, and
bearing.
3. Secure the idle shaft in a vise with the SST; then
tighten the locknut to the lower limit of the tighten-
ing torque.
Tightening torque:
128 N-m (13 m-kg, 94 ft-lb)
Note
Use the protective plates to prevent damage
to the SST.
86U07B-343
7B—183

7B INSPECTION AND REPAIR
4. Check and adjust the idle gear bearing preload.
(1) Turn the idle gear assembly and SST over, and
secure the gear in the vice.
Note
Use protective plates to prevent damage to
the idle gear.
(2) Attach the SST and spring scale or torque
wrench, and measure the preload while tight-
ening the locknut.
Tightening torque:
128—177
N m
(13—18 m-kg, 94—130 ft-lb)
49FT01 439
Preload:
0.03—0.9 N-m
(0.3—9.0 cm-kg, 0.26—7.8 in-lb)
Value indicated on pull scale:
0.3—9 N (0.03—0.9 kg, 0.066—1.98 lb)
Note
Read the preload when the idle shaft starts to
turn.
86U07B-345
86U07B-346
5. If the specified preload cannot be obtained within
the specified tightening torque, adjust by select-
ing the proper adjust shims.

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)
Note
a) The maximum allowable number of shims
is 7.
b) Preload is reduced by increasing the thick-
ness of the shims, or increased by reduc-
ing the thickness of the shims.

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