PRE-RELEASE
Power steering unit, Z19
| Power steering unit, Z19 |
| Important | ||
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Scrupulous cleanliness must always be observed during all work with hydraulic components. |
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| Important | ||
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Always use wing covers when working in the engine bay. |
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| To remove |
| 1. |
Carry out
Before removing a control module
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| 2. |
Lift off the battery cover and disconnect the negative cable from the battery.
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| 3. |
Raise the car.
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| 4. |
Remove the lower engine cover.
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| 5. |
LHD:
Remove the connector for the power steering unit.
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| 6. |
LHD:
Remove the nuts from the rubber pads.
RHD: Remove the two front nuts from the rubber pads. 
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| 7. |
Protect the flexible bellows in the exhaust pipe from fluid spill and place a receptacle under the car.
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| 8. |
Lower the car to the floor.
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| 9. |
Unhook the coolant reservoir and move it to one side. Remove the brake fluid sensor connector.
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| 10. |
RHD:
Remove the bracket for the particle filter pressure sensor from the bulkhead.
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| 11. |
Detach the water hoses to the heater package at the plastic holder and bend them aside.
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| 12. |
RHD:
Remove the connector for the power steering unit.
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| 13. |
RHD:
Remove the rear nut from the rubber pad.
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| 14. |
Empty the power steering fluid reservoir using suitable oil draining equipment.
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| 15. |
Fold forward the power steering unit and remove the delivery pipe using
89 96 803 Power steering pump hydraulic pipe spanner, 18 mm
fitted to a 1/2" ratchet handle with reducer socket.
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| 16. |
Remove the return hose from the power steering fluid reservoir.
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| 17. |
Lift up the power steering unit.
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| 18. |
Wipe away any spilled power steering fluid.
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| To fit |
| 1. |
Lower the power steering unit onto the steering gear bracket.
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| 2. |
Fit the return hose to the power steering fluid reservoir with a new hose clip.
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| 3. |
Fit a new sealing ring and connect and tighten the delivery pipe to the hydraulic unit.
Tightening torque 27 Nm (20 lbf ft) |
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| 4. |
RHD:
Fit the rear nut on the rubber pad.
Tightening torque 7 Nm (5 lbf ft) 
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| 5. |
RHD:
Attach the connector to the power steering unit. The wiring harness should lie between the bracket and the delivery pipe.
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| 6. |
Fit the water hoses in the plastic holder.
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| 7. |
RHD:
Fit the bracket for the particle filter pressure sensor onto the bulkhead.
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| 8. |
Fit the coolant reservoir and attach the brake fluid sensor connector.
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| 9. |
Raise the car.
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| 10. |
LHD:
Fit the nuts to the rubber pads.
RHD: Fit the two front nuts on the rubber pads. Tightening torque 7 Nm (5 lbf ft)
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| 11. |
LHD:
Attach the connector to the power steering unit.
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| 12. |
Remove the protection from the flexible bellows and wipe clean from oil.
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| 13. |
Fit the lower engine cover.
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| 14. |
Lower the car to the floor.
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| 15. |
Connect the battery and fit the battery cover.
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| 16. |
Fill with power steering fluid and bleed the system, see
Hydraulic system EHPS, filling and bleeding
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| 17. |
Carry out
After changing a control module.
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| 18. |
Check for leaks in the delivery and return lines.
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| 19. |
Carry out
Procedures after disconnecting the battery
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