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SR-35
STEERING - POWER STEERING VANE PUMP
SR0S7-03
Caliper Gauge INSPECTION
NOTICE:
When using a vise, do not overtighten it.
1. CHECK OIL CLEARANCE BETWEEN VANE PUMP
SHAFT AND BUSHING
Using a micrometer and caliper gauge, measure the oil clear-
ance.
Micrometer
Standard clearance:
0.03 - 0.05 mm (0.0012 - 0.0020 in.)
Vane Pump Shaft Maximum clearance: 0.07 mm (0.0028 in.)
Bushing
If it is more than the maximum, replace the vane pump shaft and
front housing.
Front Housing
Z16824
Thickness 2. INSPECT VANE PUMP ROTOR AND VANE PLATES
(a) Using a micrometer, measure the height, thickness and
length of the vane plates.
Height
Minimum height: 8.6 mm (0.339 in.)
Minimum thickness: 1.397 mm (0.0550 in.)
Minimum length: 14.991 mm (0.5902 in.)
Length
N00372
(b) Using a feeler gauge, measure the clearance between
the vane pump rotor groove and vane plate.
Maximum clearance: 0.035 mm (0.0014 in.)
Feeler Gauge
R10282
2002 4RUNNER (RM887U)
Author : Date : 1393
SR-36
STEERING - POWER STEERING VANE PUMP
If it is more than the maximum, replace the vane plate and/or
vane pump 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 plate lengths with the following vane pump ro-
tor and cam ring marks:
Rotor and cam Vane plate part Vane plate length
Inscribed Mark R13897 ring mark number mm (in.)
14.999-15.001
None 44345-26010
(0.59051-0.59059)
14.997-14.999
1 44345-26020
(0.59043-0.59051)
14.995-14.997
2 44345-26030
(0.59035-0.59043)
14.993-14.995
3 44345-26040
(0.59027-0.59035)
14.991-14.993
4 44345-26050
(0.59020-0.59027)
3. INSPECT FLOW CONTROL VALVE
(a) Coat the flow control valve with power steering fluid and
check that it falls smoothly into the flow control valve hole
by its own weight.
R12184
(b) Check the flow control valve for leakage. Close one of the
Compressed Air
holes and apply 392 - 490 kPa (4 - 5 kgf/cm2, 57 - 71 psi)
of compressed air into the opposite side hole, and confirm
that air does not come out from the end hole.
W02082
If necessary, replace the flow control valve with one having the
same letter as inscribed on the front housing.
Inscribed mark: A, B, C, D, E or F
Inscribed Mark
R12185
2002 4RUNNER (RM887U)
Author : Date : 1394
SR-37
STEERING - POWER STEERING VANE PUMP
4. INSPECT SPRING
Using vernier calipers, measure the free length of the spring.
Minimum free length: 33.2 mm (1.307 in.)
If it is not within specification, replace the spring.
Calipers
R08702
2002 4RUNNER (RM887U)
Author : Date : 1395
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