Page 3145 of 3502

POWER STEERING OIL PUMP
PS-31
C
D
E
F
H
I
J
K
L
MA
B
PS
Disassembly and Assembly (Except for QR20DE Models)BGS00040
COMPONENTS
INSPECTION BEFORE DISASSEMBLY
Disassemble oil pump only when the following malfunctions occur.
If oil leakage is found on oil pump.
Oil pump pulley is damaged or deformed.
Performance of oil pump is low.
DISASSEMBLY
NOTE:
Secure oil pump in a vise if necessary.
CAUTION:
Use copper plates when securing in a vise.
1. Remove rear cover mounting bolts, and then remove rear cover from body assembly.
2. Remove gasket from body assembly.
3. Remove dowel pin, cartridge and side plate from body assembly.
4. Remove pulley mounting nut and washer, and then remove pulley from drive shaft assembly.
5. Remove bracket mounting bolts, and then remove bracket from body assembly.
1. Copper washer 2. Joint 3. Flow control valve
4. Spring 5. Suction pipe 6. O-ring
7. Rear cover 8. Gasket 9. Dowel pin
10. Cartridge 11. Cam ring 12. Rotor
13. Vane 14. Side plate 15. O-ring
16. Body assembly 17. Oil seal 18. Drive shaft
19. Snap ring 20. Pulley 21. Bracket
Refer to GI-10, "
Components" , and the followings for the symbols in the figure.
: Apply power steering fluid.
: Apply multi-purpose grease.
SGIA1618E
Page 3146 of 3502

PS-32
POWER STEERING OIL PUMP
6. Remove snap ring from drive shaft and press out it.
CAUTION:
When removing snap ring, be careful not to damage drive
shaft.
7. Remove oil seal from body assembly using flat-bladed screw-
driver.
8. Remove O-ring from body assembly.
9. Remove mounting bolt, and then remove joint and copper
washer, then pull out flow control valve and spring from body
assembly.
10. Remove mounting bolts of suction pipe, and then remove suc-
tion pipe from body assembly.
11. Remove O-ring from body assembly.
INSPECTION AFTER DISASSEMBLY
Body Assembly and Rear Cover Inspection
Check body assembly and rear cover for internal damage. Replace rear cover if it is damaged. Replace oil
pump assembly if body assembly is damaged.
Cartridge Assembly Inspection
Check cam ring, rotor and vane for damage. Replace cartridge assembly if there are.
Side Plate Inspection
Check side plate for damage. Replace side plate if there are.
Flow Control Valve Inspection
Check flow control valve and spring for damage. Replace if there are.
SST010B
SST034A
SGIA0524E
Page 3147 of 3502

POWER STEERING OIL PUMP
PS-33
C
D
E
F
H
I
J
K
L
MA
B
PS
ASSEMBLY
NOTE:
Secure oil pump in a vise if necessary.
CAUTION:
Use copper plates when securing in a vise.
1. Apply recommended grease to oil seal lips (1). Apply recom-
mended fluid to around oil seal, and then install oil seal to body
assembly.
2. Apply recommended fluid to drive shaft, and press drive shaft
into body assembly, then install snap ring.
3. Apply recommended fluid to O-ring, and then install O-ring into
body assembly.
4. Install side plate to body assembly.
5. Install dowel pin (3) into dowel pin hole (A), and then install cam
ring (2) pointing it's D
1 side toward the body assembly (1) side
as shown in the figure.
When installing cam ring, turn carved face with a letter E (B)
of it to rear cover.
CAUTION:
Do not confuse the assembling direction of cam ring. If
cam ring is installed facing the incorrect direction, it may
cause oil pump operation malfunction.
6. Install rotor to body assembly.
SGIA1150E
SGIA0422E
SGIA1166E
Page 3148 of 3502
PS-34
POWER STEERING OIL PUMP
When installing rotor, turn mark face on rotor to body assem-
bly.
7. Install vane to rotor so that arc of vane faces cam ring side.
8. Check drive shaft turns smoothly.
9. Install gasket to body assembly.
10. Install rear cover to body assembly, and then tighten mounting
bolts to the specified torque.
11. Install bracket to body assembly, and then tighten mounting
bolts to the specified torque.
12. Install pulley and washer to drive shaft, and then tighten lock nut
to the specified torque.
13. Install spring, flow control valve and copper washer to body
assembly, and then tighten mounting bolt to the specified torque.
14. Apply recommended fluid to O-ring, and then install O-ring to
body assembly.
15. Install suction pipe to body assembly.
SGIA0989E
SST843A
SGIA0425E
Page 3149 of 3502

POWER STEERING OIL PUMP
PS-35
C
D
E
F
H
I
J
K
L
MA
B
PS
Disassembly and Assembly (QR20DE Models)BGS0004D
COMPONENTS
INSPECTION BEFORE DISASSEMBLY
Disassemble oil pump only when the following malfunctions occur.
If oil leakage is found on oil pump.
Oil pump pulley is damaged or deformed.
Performance of oil pump is low.
DISASSEMBLY
NOTE:
Secure oil pump in a vise if necessary.
CAUTION:
Use copper plates when securing in a vise.
1. Remove rear bracket mounting bolts, and then remove rear bracket from rear cover.
2. Remove front bracket mounting bolts, and then remove front bracket from body assembly.
3. Remove rear cover mounting bolts, and then remove rear cover from body assembly.
4. Remove rear side plate from cartridge, and then remove Teflon ring and O-ring from rear side plate.
1. Rear bracket 2. Rear cover 3. Teflon ring
4. O-ring 5. Rear side plate 6. Rotor snap ring
7. Vane 8. Rotor 9. Cam ring
10. Cartridge 11. Front side plate 12. O-ring
13. Dowel pin 14. Flow control valve A 15. Flow control valve spring
16. Flow control valve B assembly 17. Body assembly 18. O-ring
19. Suction pipe 20. Oil seal 21. Front bracket
22. Pulley
Refer to GI-10, "
Components" , and the followings for the symbols in the figure.
: Apply power steering fluid.
: Apply multi-purpose grease.
SGIA1619E
Page 3150 of 3502

PS-36
POWER STEERING OIL PUMP
5. Remove rotor snap ring using a snap ring plier, and remove pul-
ley from body assembly.
CAUTION:
Remove pulley so as not to be damaged when removing
rotor snap ring.
6. Remove cartridge, front side plate, flow control valve A, flow
control valve spring, flow control valve B assembly from body
assembly.
CAUTION:
Do not drop and damage flow control valve A and flow con-
trol valve B assembly when removing.
7. Remove oil seal from body assembly.
8. Remove mounting bolts of suction pipe, and then remove suc-
tion pipe from body assembly.
9. Remove O-ring from body assembly.
INSPECTION AFTER DISASSEMBLY
Body Assembly and Rear Cover Inspection
Check body assembly and rear cover for internal damage. Replace rear cover if it is damaged. Replace oil
pump assembly if body assembly is damaged.
Cartridge Assembly Inspection
Check cam ring, rotor and vane for damage. Replace cartridge assembly if necessary.
Side Plate Inspection
Check side plate (front and rear) for damage. Side plate (front and rear) must be replaced as a set if they are
damaged.
Flow Control Valve Inspection
Check flow control valve A, flow control valve spring and flow control valve B assembly for damage. Replace if
there are.
SGIA0059E
SGIA0526E
Page 3151 of 3502
POWER STEERING OIL PUMP
PS-37
C
D
E
F
H
I
J
K
L
MA
B
PS
ASSEMBLY
NOTE:
Secure oil pump in a vise if necessary.
CAUTION:
Use copper plates when securing in a vise.
1. Apply recommended grease to oil seal lips. Apply recommended
fluid to around oil seal, and then install oil seal to body assembly
using the drift [SST].
2. If dowel pin has been removed, insert it into body assembly by
hand. If cannot be inserted by hand, lightly tap with a hammer.
3. Install flow control valve A, flow control valve spring and flow
control valve B assembly as shown in the figure.
4. Install front side plate (3) with dowel pin (2) on flow control valve
A (1) side as shown in the figure aligning with front side plate
cutout (A) to body assembly (4).
5. Install cam ring as shown in the figure.
6. Install pulley to body assembly.
CAUTION:
Do not damage oil seal when installing pulley.
STC0914D
SGIA0526E
SGIA1189E
SGIA0612E
Page 3152 of 3502

PS-38
POWER STEERING OIL PUMP
7. Install rotor so that mark faces body assembly side, and then
install it to pulley shaft.
8. Install vane to rotor so that arc of vane faces cam ring side.
9. Install rotor snap ring to slit of pulley shaft using a hammer and a
10 mm (0.39 in) socket.
CAUTION:
Do not damage rotor and pulley shaft.
Power steering oil pump must be replaced if rotor is dam-
aged.
10. Install rear side plate with dowel pin A on flow control valve A
side as shown in the figure aligning with rear side plate cutout B
to cartridge.
11. Apply recommended fluid to O-ring, and then Install O-ring to
body assembly.
12. Apply recommended fluid to O-ring, and then install O-ring to
rear side plate.
13. Apply recommended fluid to Teflon ring, and then install Teflon
ring to rear side plate.
14. Install rear cover to body assembly, and then tighten mounting
bolts to the specified torque.
15. Apply recommended fluid to O-ring, and then install O-ring to body assembly.
16. Install suction pipe to body assembly.
17. Install rear bracket to rear cover, and then tighten mounting bolts to the specified torque.
18. Install front bracket to body assembly, and then tighten mounting bolts to the specified torque.
SGIA0874E
SGIA0613E
SGIA0063E
SGIA0530E