Nissan Terrano model r20 series 2004. Instruction — part 239
4. While holding cam ring and spring lift out cam ring spring.
I
Be careful not to damage oil pump housing.
I
Hold cam ring spring to prevent it from jumping.
5. Remove cam ring and cam ring spring from oil pump housing.
6. Remove pivot pin from control piston and remove control pis-
ton assembly.
7. Remove oil seal from oil pump housing.
I
Be careful not to scratch oil pump housing.
INSPECTION
Oil pump cover, rotor, vanes, control piston, side seals,
cam ring and friction ring
I
Check for wear or damage.
SAT652A
SAT653A
SAT654A
SAT655A
SAT656A
REPAIR FOR COMPONENT PARTS
Oil Pump (Cont’d)
AT-140
Side clearances
I
Measure side clearances between end of oil pump housing and
cam ring, rotor, vanes and control piston. Measure in at least
four places along their circumferences. Maximum measured
values should be within specified positions.
I
Before measurement, check that friction rings, O-ring, con-
trol piston side seals and cam ring spring are removed.
Standard clearance (Cam ring, rotor, vanes and con-
trol piston):
Refer to SDS, AT-204.
I
If not within standard clearance, replace oil pump assembly
except oil pump cover assembly.
Seal ring clearance
I
Measure clearance between seal ring and ring groove.
Standard clearance:
0.10 - 0.25 mm (0.0039 - 0.0098 in)
Wear limit:
0.25 mm (0.0098 in)
I
If not within wear limit, replace oil pump cover assembly.
ASSEMBLY
1. Drive oil seal into oil pump housing.
I
Apply ATF to outer periphery and lip surface.
2. Install cam ring in oil pump housing by the following steps.
a. Install side seal on control piston.
I
Pay attention to its direction — Black surface goes toward
control piston.
I
Apply petroleum jelly to side seal.
b. Install control piston on oil pump.
c. Install O-ring and friction ring on cam ring.
I
Apply petroleum jelly to O-ring.
SAT657A
SAT658A
NAT295
SAT654A
SAT660A
REPAIR FOR COMPONENT PARTS
Oil Pump (Cont’d)
AT-141
d. Assemble cam ring, cam ring spring and spring seat. Install
spring by pushing it against pump housing.
e. While pushing on cam ring install pivot pin.
3. Install rotor, vanes and vane rings.
I
Pay attention to direction of rotor.
4. Install oil pump housing and oil pump cover.
a. Wrap masking tape around splines of oil pump cover assembly
to protect seal. Position oil pump cover assembly in oil pump
housing assembly, then remove masking tape.
b. Tighten bolts in a criss-cross pattern.
5. Install new seal rings carefully after packing ring grooves with
petroleum jelly. Press rings down into jelly to a close fit.
I
Seal rings come in two different diameters. Check fit care-
fully in each groove.
Small dia. seal ring:
No mark
Large dia. seal ring:
Yellow mark in area shown by arrow
I
Do not spread gap of seal ring excessively while installing.
It may deform ring.
SAT661A
SAT651A
SAT662A
SAT649A
YAT341
REPAIR FOR COMPONENT PARTS
Oil Pump (Cont’d)
AT-142
Control Valve Assembly
NAT294
REPAIR FOR COMPONENT PARTS
AT-143
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