Inspection

Oil Pump

INSPECTION

BASIC INSPECTION

Perform the following inspection procedures and replace faulty parts.





SERVICE LIMIT

Make a measurements as follows. If it exceeds the service limit, replace with a new part.

CAUTION:
^ When securing the oil pump on a vise, hold the oil pump with the least possible force between two pieces of wood.
^ Do not set the outside of flow control valve or pulley on a vise; otherwise outside or pulley might be deformed. Select properly sized wood pieces.

1) Play of the pulley shaft

Condition:
When applying the force of 9.8 N (1.0 kgf, 2.2 lb)

Service limit:
Play in the radial direction (Direction black left arrow black right arrow)
0.2 mm (0.008 in) or less





Axial play (Direction white left arrow white right arrow)
0.6 mm (0.024 in) or less





2) Deflection of the pulley groove

Service limit:
1.0 mm (0.039 in) or less

NOTE:
Read the value for one surface of V ditch, and then the value for another off the dial.





3) Rotating resistance of pulley

Service limit:
Maximum load: 9.22 N (0.94 kgf, 2.07 lb) or less

NOTE:
^ A rather higher value may be indicated when pulley starts turning.
^ Measure the load during rotation to make a judgment.





HYDRAULIC PRESSURE

NOTE:
^ To measure hydraulic pressure correctly, be sure to complete all the items in "INSPECTION", prior to performing the measurement. Testing and Inspection
^ Do not leave the valve of pressure gauge closed or hold the steering wheel at lock for 5 seconds or more in any case, this can damage the oil pump.
^ Before attaching a pressure gauge, place cloth at locations where fluid is expected to spill. Wipe off any spilt fluid completely after the measurement.

1) Regular pressure measurement
(1) Connect the ST1, ST2 and ST3.
ST1 925711000 PRESSURE GAUGE
ST2 34099AC020 ADAPTER HOSE B
ST3 34099AC010 ADAPTER HOSE A
(2) Remove the air intake duct.
(3) Disconnect the pipe C from pump.
(4) Using the gasket (Part No. 34621AC021) and bolt (Part No. 34620AC010), install the ST2 to pump instead of pressure hose.





(5) Attach the ST3 to the end of pressure hose which is removed from pump.
(6) Replenish power steering fluid up to the specified level.
(7) Open the valve, and start the engine.
(8) Measure the regular pressure.
ST1 925711000 PRESSURE GAUGE
ST2 34099AC020 ADAPTER HOSE B
ST3 34099AC010 ADAPTER HOSE A





Service limit:
981 kPa (10 kg/cm2, 142 psi) or less

(9) If it is not within the specification, replace the problem part for the following problems. (Pipe or hose clogged, leaks from fluid line, and mixture of foreign matter in fluid line)
2) Measure the relief pressure.
(1) Using the STs, measure the relief pressure.
(2) Close the valve.
(3) Measure the relief pressure.
ST1 925711000 PRESSURE GAUGE
ST2 34099AC020 ADAPTER HOSE B
ST3 34099AC010 ADAPTER HOSE A





Service limit:
8,800 - 9,400 kPa (90 - 96 kg/cm2, 1,276 - 1,363 psi)

(4) If it is not within the specification, replace the oil pump.
3) Measure the working pressure.
(1) Using the ST, measure the working pressure.
(2) Open the valve.
(3) Measure the working pressure of control valve by turning steering wheel from stop to stop.

NOTE:
Because of the power steering system setup, there are conditions where the pressure will not rise to the repair limit value even if the steering wheel is turned to the maximum steering angle. In this case, turn the steering wheel further than the maximum steering angle to measure the operational pressure.

ST1 925711000 PRESSURE GAUGE
ST2 34099AC020 ADAPTER HOSE B
ST3 34099AC010 ADAPTER HOSE A





Service limit:
8,800 - 9,400 kPa (90 - 96 kg/cm2, 1,276 - 1,363 psi)

(4) If it is out of specification, measure the steering effort. If it is not within specification, replace the control valve itself or control valve and pinion as a single unit, using new parts. Testing and Inspection