Power Steering Pump: Service and Repair
A: REMOVAL1. Remove ground cable from battery.
2. Drain the working fluid about 0.3 l (0.3 US quarts, 0.3 Imp quarts) from oil tank.
3. Remove pulley belt cover bracket.
4. Loosen oil pump pulley nut, then remove bolts which secure alternator.
5. Loosen pulley belt(s).
6. Remove the nut and detach oil pump pulley.
7. Disconnect pipe C from oil pump. Disconnect pipe D from oil tank.
CAUTION:
- Do not allow fluid from the hose end to come into contact with pulley belt.
- To prevent foreign matter from entering the hose and pipe, cover the open ends of them with a clean cloth.
- Except when only oil tank needs to be inspected, detach oil tank and oil pump as a unit. Then separate one from the other on a work bench to prevent oil from spilling on any part of the engine.
8. Remove three bolts from the front side of oil pump and detach the pump.
9. Remove three bolts from the lower side of bracket and detach the bracket.
CAUTION: The bracket does not need to be removed unless it is damaged.
10. Place oil pump in a vise, and remove shell upper and baffle from shell lower.
CAUTION: Do not clamp oil pump too hard; otherwise oil pump may be dented.
11. Remove shell lower from oil pump.
B: CHECK
- In accordance with the following table, check all removed parts for wear and damage, and make repair or replacement if necessary.
1. SERVICE LIMIT
Make a measurement as follows. If it exceeds the specified service limit, replace the parts with new ones.
CAUTION:
- Fix oil pump on a vise to make a measurement. At this time, hold oil pump with the least possible force between two wood pieces.
- Do not set outside of flow control valve or pulley on a vise; otherwise outside or pulley might be deformed. Select properly sized wood pieces.
- Play of pulley shaft
On condition:
P: 9.8 N (1.0 kg, 2.2 lbs.)
Service limit.
Radial play (Direction <->) 0.4 mm (0.016 inch) or less
Axial play (Direction <->) 0.9 mm (0.035 inch) or less
- Ditch deflection of pulley
Service limit: 1.0 mm (0.039 inch) or less
NOTE: Read the value for one surface of V ditch, and then the value for another off the dial.
- Resistance to rotation of pulley
Service limit:
Maximum load: 9.22 N (0.94 kg, 2.07 lbs.) or less
NOTE:
- A rather higher value may be indicated when pulley starts turning.
- Measure the load during rotation and make a judgment.
C: INSTALLATION
1. Install bracket on engine.
Tightening torque: 22±2 Nm (2.2±0.2 kg-m, 15.9±1.4 ft. lbs.)
2. Install oil pump on oil tank as follows outside the vehicle:
NOTE: Prior to installation, make sure that all oil is removed from oil pump, oil tank and pipe.
1. Place oil pump in a vise and install stay to oil pump.
CAUTION: Do not place oil pump directly in vise; use soft pads and hold oil pump lightly to protect it.
Tightening torque: 15.7±2.4 Nm (1.60±0.24 kg-m, 11.6±1.7 ft. lbs.)
2. Install shell lower to oil pump.
Tightening torque: 18+5/0 Nm (1.8+0.5/0 kg-m, 13.0+3.6/0 ft. lbs.)
CAUTION: Be sure to use a new seal washer.
3. Install shell upper and baffle to shell lower.
Tightening torque: 13±3 Nm (1.3±0.3 kg-m, 9.4±2.2 ft. lbs.)
3. Install oil pump, previously assembled to oil tank, on bracket.
Tightening torque: 18+5/0 Nm (1.8+0.5/0 kg-m, 13.0+3.6/0 ft. lbs.)
4. Place oil pump pulley and tighten pulley nut temporarily.
5. Install pulley belt to oil pump.
6. Tighten oil pump pulley nut to the specified torque.
Tightening torque: 52±10 Nm (5.3±1.0 kg-m, 38±7 ft. lbs.)
7. Check pulley belt tension.
8. Tighten bolt belt tension.
Tightening torque: 8±2 Nm (0.8±0.2 kg-m, 5.8±1.4 ft. lbs.)
9. Interconnect pipes C and D.
Tightening torque:
Eye bolt 39±5 Nm (4.0±0.5 kg-m, 28.9±3.6 ft. lbs.)
CAUTION: If a hose is twisted at this step, the hose may come into contact with some other parts.
10. Install pulley belt cover bracket.
11. Connect minus terminal of battery.
12. Feed the specified power steering fluid and discharge air.
CAUTION: Never start the engine before feeding the fluid; otherwise vane pump might be seized up.