1987 MAZDA 626 Workshop Manual

INSPECTION AND REPAIR 7C
OIL PUMP
Disassembly
Disassemble in the sequence shown in the figure, referring to the disassembly note for specially marked
parts.
76G07C-130 1. Seal ring
2. Seal ring
3. Pump cover
4. Pump flange
5. Inner gear
6. Outer gear
7. Pump housing
63U07B-089
Disassembly note
Inner gear and outer gear
Mark the inner and outer gears with paint before
removing them.
76G07C-131
Inspection
Check for the following and replace any faulty parts:
1. Damaged or worn inner or outer gear tooth
surfaces.
2. Broken or worn seal ring.
76G07C-132
7C—55

7C INSPECTION AND REPAIR
3. Clearance
Measured location Standard Maximum
1 Gear to pump cover 0.02—0.04 mm (0.001—0.002 in) 0.08 mm (0.003 in)
2 Outer gear to crescent 0.14-0.21 mm (0.006-0.008 in) 0.25 mm (0.010 in)
3 Outer gear to housing 0.05—0.20 mm (0.002—0.008 in) 0.25 mm (0.010 in)
4 Oil seal ring to ring groove 0.04-0.16 mm (0.002-0.006 in) 0.40 mm (0.016 in)
76G07C-133
Pump
housing
Bushing.
Sleeve
Pump cover
4. Damaged or worn inner gear bushing of pump
housing sleeve.
Sleeve outer diameter:
37.900 mm (1.492 in) max.
Bushing inner diameter:
38.075 mm (1.499 in) max.
76G07C-134
7C-56

INSPECTION AND REPAIR 7C
76G07C-135
76G07C-136
76G07C-137
Assembly
1. Assemble so that the marks on the inner and out-
er gears are at the pump cover side.
2. Install the pump flange.
3. Install the oil pump cover.
Tightening torque: 11—14 N-m
(110—140 cm-kg, 95—122 in-lb)
4. Install the seal rings.
Seal ring outer diameter
A: 44 mm (1.732 in)
B: 43 mm (1.693 in)
5. When the assembly is completed, install the oil
pump shaft and make sure the gears turn easily.
76G07C-138
7C—57

7C INSPECTION AND REPAIR
FRONT CLUTCH
Disassembly
Disassemble in the sequence shown in the figure, referring to the disassembly note for specially marked
parts.
76G07C-139 1 Snap rjng
2. Retaining plate
3. Drive and driven
plates
4. Dished plate
5. Snap ring
6. Spring retainer
7. Return spring
8. Piston
9. Seal rings
10. Rear clutch
drum
76G07C-140
63U07B-097
Disassembly note
Front clutch clearance
Before disassembling the front clutch, measure the
front clutch clearance.
Front clutch clearance:
1.6—1.8 mm (0.063—0.071 in)
Note
If the clearance is not within specification, ad-
just by using the retaining plate at the time of
assembly. (Refer to page 7C—60.)
Snap ring
Compress the clutch spring with the SST, and re-
move the snap ring with a screwdriver.
76G07C-141
7C-58

INSPECTION AND REPAIR 7C
Piston
Remove the piston by blowing compressed air into
the hole indicated.
76G07C-142
76G07C-143
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)
9. Worn drum bushing
Drum bushing inner diameter:
44.075 mm (1.735 in) max.
76G07C-144
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.
76G07C-145
7C—59

7C INSPECTION AND REPAIR
4. Install the return springs and the spring retainer.
76G07C-146
5. Install the snap ring.
(1) Place the SST onto the spring retainer and
compress only enough to install the snap ring.
(2) Install the snap ring into the groove.
(3) Remove the SST.
76G07C-147
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
Install the retaining plate with the step facing up-
ward; then install the snap ring.
76G07C-148
8. Check the front clutch clearance.
(1) Measure the clearance between the snap ring
and retaining plate of the front clutch with a feel-
er gauge.
Front clutch clearance:
1.6—1.8 mm (0.063—0.071 in)
(2) If the clearance is not within specification, ad-
just it by selecting a proper retaining plate.
Retaining plate sizes mm (in)
76G07C-149 5.2 (0.205) 5.4 (0.213) 5.6 (0.220)
5.8 (0.228) 6.0 (0.236) 6.2 (0.244)
7C—60

INSPECTION AND REPAIR 7C
9. Check the front clutch operation.
(1) Set the clutch assembly onto the oil pump.
(2) Check the front clutch operation by applying
compressed 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-150
(3) Pour ATF into the front clutch until the clutch
piston is fully submerged.
76G07C-151
(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-152
7C-61

7C INSPECTION AND REPAIR
REAR CLUTCH
Disassembly
Disassemble in the sequence shown in the figure, referring to the disassembly note for specially marked
parts.
76G07C-153
1. Snap ring
2. Retaining plate
3. Drive and driven
plates
4. Dished plate
5. Snap ring
6. Spring retainer
7. Return spring
8. Piston
9. Seal rings
10. Rear clutch
drum
63U07B-109
Disassembly note
Rear clutch clearance
Before disassembling the rear clutch, measure the
rear clutch clearance.
Rear clutch clearance:
0.8—1.0 mm (0.031—0.039 in)
Note
If the clearance is not within specification, ad-
just it by selecting a proper retaining plate.
(Refer to page 7C—64.)
76G07C-154
Snap ring
Compress the clutch spring, with the SST ; then re-
move the snap ring with a screwdriver.
76G07C-156
7C-62