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9. CHECK PRESSURE READING WITH STEERING WHEELTURNED TO FULL LOCK
Be sure the pressure gauge valve is fully opened and the en-
gine idling.
Minimum pressure:
7,355 kPa (75 kgf/cm
2, 1,067 psi)
NOTICE:
w Do not maintain lock position for more than 10 seconds.
w Do not let the fluid temperature become too high.
If pressure is low, the gear housing has an internal leak and
must be repaired or replaced.
10. MEASURE STEERING EFFORT
(a) Center the steering wheel and run the engine at idle.
(b) Using a spring scale, measure the steering effort in both directions.
Maximum steering effort:
40 N (4.1 kgf, 9.0 lbf)
If steering effort is excessive, repair the power steering unit.
HINT: Be sure to consider the tire type, pressure and contact
surface before making your diagnosis.
(c) Disconnect the solenoid connector.
(d) Using a spring scale, measure the steering effort in both directions.
(Reference)
Maximum steering effort:
76 N (7.7 kgf, 17.0 lbf)
If steering effort is not heavier than (b), check solenoid.
HINT: Be sure to consider the tire type, pressure and contact
surface before making your diagnosis.
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STEERING POWER STEERINGSR±117
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POWER STEERING PUMP
(SC400)
POWER STEERING PUMP REMOVAL
AND INSTALLATION
SR0G4±01
Remove and install the parts, as shown.
MAIN POINTS OF REMOVAL AND
INSTALLATION
1. REMOVE DRIVE BELTLoosen the drive belt tension by turning the drive belt tension-
er counterclockwise, and remove the drive belt.
SR±118
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2. INSTALL PUMP ASSEMBLYTorque the bolts and nut on the pump assembly in the order
shown.
Torque:
Bolt 39 N Vm (400 kgf Vcm, 29 ft Vlbf)
Nut 43 N Vm (440 kgf Vcm, 32 ft Vlbf)
3. CONNECT PRESSURE TUBE
Make sure the stopper is touching the pump housing, as
shown, then torque the union bolt.
Torque: 49 N Vm (500 kgf Vcm, 36 ft Vlbf)
4. BLEED POWER STEERING SYSTEM
(See page SR±115)
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COMPONENTS
SR0G5±03
SECTIONAL VIEW
SR0G6±01
SR±120±
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POWER STEERING PUMP
DISASSEMBLY
SR0G7±02
1. MOUNT POWER STEERING PUMP IN VISE
NOTICE: Do not tighten the vise too tight.
2. REMOVE PUMP PULLEY
(a) Using SST, remove the pulley set nut.SST 09278±54012
(b) Remove the pulley.
3. REMOVE SUCTION PORT UNION
(a) Remove the 2 bolts and union.
(b) Remove the O±ring from the union.
4. REMOVE PRESSURE PORT UNION, FLOW CONTROL
VALVE AND SPRING
(a) Remove the pressure port union.
(b) Remove the O±ring from the union.
(c) Remove the flow control valve and spring.
5. REMOVE SPRING SEAT
(a) Using snap ring pliers, remove the snap ring. HINT: The snap ring is easier to remove if the spring seat is
pressed down slightly.
(b) Temporarily install a bolt to the seat and pull out it. HINT: Use a bolt with diameter 6 mm (0.24 in.) and pitch 1.0
mm (0.039 in.).
(c) Remove the O±ring from the seat.
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STEERING POWER STEERINGSR±121
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6. REMOVE VANE PUMP SHAFT WITH BEARING
(a) Using snap ring pliers, remove the snap ring.
(b) Temporarily install the appropriate plate washer and pulleynut to the pump shaft.
(c) Using SST, pull out the pump shaft.
SST 09910±00015 (09911±00011, 09912±00010)
7. REMOVE REAR BRACKET
(a) Remove the 4 bolts and rear bracket.
(b) Remove the O±ring from the bracket.
8. REMOVE WAVE WASHER
9. REMOVE SIDE FRONT PLATE, CAM RING, ROTOR, VANE
PLATES AND SIDE REAR PLATE
(a) Using an extension bar and press, remove the side front
plate, cam ring, rotor, vane plates and side rear plate as an
assembly.
HINT: Catch the assembly in your hand to prevent it dropping.
SR±122
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(b) Remove the side rear plate.
(c) Remove the O±ring from side rear plate.
(d) Remove the cam ring, rotor and the 10 vane plates.
(e) Remove the straight pin from the side front plate.
(f) Remove the 2 O±rings from the side front plate.
(g) Remove the straight pin from the front housing.HINT: Place a workshop rag over the pin to prevent damaging
it.
POWER STEERING PUMP INSPECTION
SR0G8±02
1. MEASURE OIL CLEARANCE OF SHAFT AND BUSHINGUsing a micrometer and calipers, measure the oil clearance.
Standard clearance:
0.01±0.03 mm (0.0004±0.00012 in.)
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Maximum clearance:0.07 mm (0.0028 in.)
If more than maximum, replace the entire power steering
pump.
2. INSPECT ROTOR AND VANE PLATES
(a) Using a micrometer, measure the height, thickness and length of the vane plates.
Minimum height:
8.0 mm (0.315 in.)
Minimum thickness: 1.77 mm (0.0697 in.)
Minimum length:
14.97 mm (0.5894 in.)
(b) Using a feeler gauge, measure the clearance between therotor groove and vane plate.
Maximum clearance:
0.03 mm (0.0012 in.)
If more then maximum, replace the vane plate and/or rotor
with one having the same mark stamped on the cam ring.
Inscribed mark:1, 2, 3, 4 or None
HINT: There are 5 vane lengths with the following rotor and
cam ring marks:
Rotor and camring number Vane length mm (in.)
None 14.996±14.998 (0.59039±0.59047) 1 14.994±14.996 (0.59031±0.59039) 2 14.992±14.994 (0.59023±0.59031)
3 14.990±14.992 (0.59016±0.59024)
4 14.988±14.990 (0.59007±0.59016)
3. INSPECT FLOW CONTROL VALVE
(a) Coat the valve with power steering fluid and check that it falls smoothly into the valve hole by its own weight.
SR±124
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STEERING POWER STEERING
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