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SR-51
STEERING - POWER STEERING VANE PUMP (1GR-FE)
SR1KV-01
INSPECTION
Bushing 1. MEASURE OIL CLEARANCE BETWEEN VANE PUMP
SHAFT AND BUSHING
Using a micrometer and a caliper gauge, measure the oil clear-
ance.
Maximum clearance: 0.07 mm (0.0028 in.)
If it is more than the maximum, replace the vane pump assem-
Vane Pump Shaft Front Housing bly.
F09875
Thickness
2. INSPECT VANE PUMP ROTOR AND VANE PLATES
(a) Using a micrometer, measure the thickness of the 10
Height vane plates.
Standard thickness:
1.405 to 1.411 mm (0.05531 to 0.05555 in.)
Length
N00372
(b) Using a feeler gauge, measure the clearance between a
side face of the vane pump rotor groove and the vane
plate.
Maximum clearance: 0.03 mm (0.0012 in.)
If it is more than the maximum, replace the vane pump assem-
bly.
Feeler Gauge
R10282
3. INSPECT FLOW CONTROL VALVE
(a) Coat the flow control valve with power steering fluid and
check that it falls smoothly into the valve hole of the front
housing under its own weight.
If it lacks smoothness, replace the vane pump assembly.
F08476
(b) Check the flow control valve for leakage. Close one of the
Compressed Air
holes and apply compressed air of 392 to 490 kPa (4 to
5 kgf/cm2, 57 to 71 psi) into the opposite side hole, and
confirm that air does not come out from the end hole.
If air leaks, replace the vane pump assembly.
F08804
SR-52
STEERING - POWER STEERING VANE PUMP (1GR-FE)
4. INSPECT SPRING
Using vernier calipers, measure the free length of the spring.
Minimum free length: 36.9 mm (1.453 in.)
If it is not within the specification, replace the vane pump as-
sembly.
5. INSPECT PRESSURE PORT UNION
Vernier Calipers If the union seat in the pressure port union is severely dam-
aged, it may cause fluid leakage. In that case, replace the vane
R08702 pump assembly.
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