power steering MAZDA 626 1987 Owner's Manual

INSPECTION AND ADJUSTMENT 1 0
INSPECTION AND ADJUSTMENT
BLEEDING OF POWER STEERING SYSTEM
1. Check the fluid level, and add fluid if necessary.
2. Turn the steering wheel fully in both directions 5
times (engine not running).
3. Recheck the fluid level. If the level has lowered,
add fluid, and repeat from step 1.
86U10X-021
4. Start the engine, and run it at idle.
5. Turn the steering wheel fully in both directions 5
times to bleed air from the system.
6. Check that the fluid is not foamy and the fluid lev-
el has not lowered.
If a problem is found, add fluid as necessary and
repeat from step 5.
Note
If bleeding is not done completely, the follow-
ing problems may appear:
• Foamy fluid on level gauge.
• Noise from power steering oil pump.
86U10X-022
10—15

1 0 INSPECTION AND ADJUSTMENT
86U10X023
2WS
To oil pump
Si£r To gear housing
86U10X-024
86U10X-025
Thermometer [50—60°C (122—140°C)]
ii ^
Gauge
Close valve
completely
POWER STEERING PRESSURE
1. Disconnect the high-pressure hose of the gear
housing side, and attach the SST.
Tightening torque:
39—49 N-m (4.0—5.0 m-kg, 29—36 ft-lb)
2. Bleed air from the system.
3. Open the gauge valve fully, then start the engine
and turn the steering wheel fully left and right to
raise the fluid temperature to 50—60°C
(122—140°F)
4. To measure the fluid pressure generated by the
oil pump, close the gauge valve completely and
increase the engine speed to 1,000—1,500 rpm.
If the fluid pressure is low, replace the oil pump
assembly.
Warning
If the valve is left closed for more than 15 sec-
onds, the fluid temperature will increase ex-
cessively and adversely affect the oil pump.
Oil pump fluid pressure
2WS
7,355—7,846 kPa
(75—80 kg/cm2, 1,066—1,138 psi)
4WS
Front 8,093—8,829 kPa
(82.5—90.0 kg/cm2, 1,173—1,280 psi)
Rear 7,112—7,848 kPa
(72.5—80.0 kg/cm2, 1,031—1,138 psi)
To measure the fluid pressure generated at the
gear housing, first open the gauge valve complete-
ly, increase the engine speed to 1,000—1,500
rpm, and then turn the steering wheel fully to the
left and right.
Warning
If the steering wheel is kept in the fully turned
position for more than 15 seconds, the fluid
temperature will rise excessively.
80U10X-026
10—16

1 0 STEERING GEAR AND LINKAGE
STEERING GEAR AND LINKAGE
STRUCTURAL VIEW
Manual steering
Power steering
1. Oil pressure switch connector
2. Pipes
3. Tie-rod end
4. Steering shaft universal joint
5. Mud flap
86U10X-051
10-28

STEERING GEAR AND LINKAGE 1 0
86U10X-052
REMOVAL
Note
The power steering fluid will leak out when the
return hose or the pressure hose is discon-
nected. Prepare a suitable container for it to
drain into.
1. Disconnect the negative battery cable.
2. Disconnect the pressure switch connector.
3. Raise the vehicle on a lift or safety stands, and re-
move the front wheels.
4. Disconnect the power steering hose and pipe.
5. Disconnect the tie-rod ends from the knuckles with
the SST.
6. Remove the steering shaft universal joint.
86U10X-053
7. Remove the mud flap.
8. Remove the mounting bolts and the steering gear.
86U10X-054
10—29

4-WHEEL STEERING GEAR AND LINKAGE 1 0
REMOVAL AND INSTALLATION
1. Jack up the vehicle and support it with safety stands.
2. Remove in the sequence shown in the figure, referring to the removal note for specially marked parts.
3. Install in the reverse order of removal, referring to installation note for specially marked parts.
4. Tighten all nuts and bolts to the specified torque, referring to page 10—39.
Note
The power steering fluid will leak out when the return hose or the pressure hose is discon-
nected. Prepare a suitable container for it to drain into.
Front Steering Gear
76G10X-034
9. Engine mount
10. Bolts and nut
11. Bolt
12. Bolt and mounting
13. Bolts and mounting
14. Stabilizer
15. Bolt
16. Front steering gear assembly
1. Pipes
2. Bolt
3. Exhaust pipe
4. Under cover
5. Shaft (Refer to next page)
6. Nuts retainer and bushing
7. Bolt, retainer and bushing
8. Nuts
10—37

1 0 ENGINE SPEED SENSING POWER STEERING
ENGINE SPEED SENSING POWER STEERING
DISASSEMBLY
Disassemble in the sequence shown in the figure, referring to the disassembly note for specially marked
parts.
Caution
a) In order to prevent the entrance of dirt, all disassembly and assembly should be done
in a clean area.
b) Before disassembly, plug the openings of all pipe installation fittings, then thoroughly
clean the steering gear and linkage.
86U10X-121
1. Oil pressure switch
2. Oil pipe
3. Tie-rod end
4. Tie-rod end locknut
5. Spring clip
6. Boot wire
7. Boot
8. Tie-rod
9. Lock pin
10. Adjust cover locknut
11. Adjust cover
12. Spring
13. Pressure pad
14. Snap ring
15. Housing cover
16. Lower bearing locknut
17. Pinion shaft and control
valve assembly
18. Oil seal
19. Upper bearing
20. Rack bushing assembly
21. Rack
22. Oil seal
23. Spacer
24. Oil seal
25. Lower bearing
26. Oil seal
27. Needle bearing
28. Seal ring
29. O-ring
30. Mounting bracket
31. Mounting rubber mount
10—58

ENGINE SPEED SENSING POWER STEERING 1 0
Disassembly Note
Steering gear and linkage
Secure the gear and linkage in a vise.
Caution
Insert protective material (such as copper
plates) in the jaws of the vise.
86U10X-122
Tie-rod ends
Before removing the tie-rod ends, make a mark for
proper installation.
86U10X-123
Tie-rod
1. Remove the tie-rod from rack.
2. Remove the roll pin with a pin-punch and hammer.
86U10X-124
Adjust cover
1. Remove the locknut from the adjust cover.
2. Remove the adjust cover with the SST.
3. Remove the spring and pressure pad.
86U10X-125
10-59

1 0 ENGINE SPEED SENSING POWER STEERING
Housing cover
1. Cut away the staked areas with a drill.
2. Remove the housing cover.
86U10X-126
Pinion shaft
1. Remove the locknut.
2. Set the gear housing assembly on a press and re-
move the pinion shaft assembly as shown in the
figure.
86U10X-127
Rack bushing
1. Cut away the staked areas with a drill.
2. Remove the rack bushing.
86U10X-128
Rack and oil seal at tube side
1. Slide the SST over the rack from the gear hous-
ing side.
Note
If the rack is removed without using the SST,
there is the possibility that the rack housing
may be damaged by the rack teeth.
86U10X-129
10—60

ENGINE SPEED SENSING POWER STEERING 1 0
86U10X-130
86U10X-131
86U10X-132
2. Install the SST to the threaded part of the rack at
the tube side.
3. Remove the oil seal at the tube side which pulling
out the rack.
Spacer and oil seal at housing side
1. Insert the SST from the pinion housing side so that
it contacts the spacer.
2. Set the SST against the SST inserted in step 1.
3. Secure the gear housing in a vise.
4. Drive the spacer and oil seal out of the housing.
Lower bearing
Drive the lower bearing out of the housing with the
SST
86U10X-133
10-61

1 0 ENGINE SPEED SENSING POWER STEERING
Oil seal and needle bearing
1. Insert the SST so that it contacts the needle
bearing.
2. Drive the oil seal and needle bearing out with the
SST bar.
86U10X-134
^aFm / y^s.
INSPECTION
Check the following and replace any faulty parts.
Pinion shaft assembly
1. Pinion shaft teeth wear or damage
2. Control valve damage, clogging, and wear
86U10X-135
Rack bushing
Wear or damage
86U10X-136
Bearing
Wear, damage, and operation
86U10X-137
10—62