Hydraulic pump (4 cyl.)

Hydraulic pump (4 cyl.)

1.

Drain the hydraulic fluid from the pump. To do this, disconnect the hose from the return­pipe and plug the hose. Connect a length of hose to the return pipe and place the other end in a bottle or similar receptacle that holds at least one litre. Start the engine and allow the hydraulic­fluid to be pumped out of the steering gear. Turn the steering wheel from full lock to full lock. Switch off the engine when no more fluid runs out into the bottle. Important Never allow the pump to run dry.

2.	Remove the hose and the bottle or other receptacle and reconnect the return­hose to the pipe connection.

3.	Remove the air cleaner.

4.	Remove the belt from the pump pulley.

5.	Remove the delivery pipe from the pump.

6.	Remove the suction hose from the pump.

7.	Undo the pump retaining bolts and remove the pump.

To fit

1.	Fit the pump and tighten the retaining bolts, using a torque wrench. Tightening torque: 20 Nm (14.8 lbf ft).

2.	Connect the delivery pipe to the pump.

3.	Connect the suction pipe to the pump.

4.	Fit the belt on the pulley.

5.	Fit the air cleaner.

6.	Fill the hydraulic fluid reservoir with hydraulic fluid. Start the engine and turn the steering wheel two or three times from full lock to full lock.

To dismantle

1.	Remove the servo pump.

2.	Press in the end cover, using a puller, and remove the locking ring through the hole in the pump casing.

3.	Remove the end cover by carefully tapping the pump casing against a vice or the like until the cover comes loose.

4.	Remove the O-ring from the end cover.

5.	Remove the thrust washer and end plate.

6.	Remove the O-ring from the pump casing.

7.	Remove the circlip from the pump shaft.

8.	Remove the pump shaft with pulley.

9.	Remove the rotor, pump vanes, pump ring and inner end plate as a single unit.

10.	Remove the pump shaft seal.

11.	Inspect the parts for wear and damage.

To assemble

1.	Fit the pump shaft seal.

2.	Fit the O-ring in the pump casing.

3.	Place the rotor, pump vanes and pump ring together in the pump housing. Also place the guides in their positions.

4.	Fit the pump shaft and the pump shaft circlip.

5.	Fit the end plate and thrust washer in the pump casing.

6.	Fit the end cover O-ring.

7.	Fit the end cover and press it in position by means of a puller. Place a sleeve between the puller and the end cover.

8.	Fit the locking ring.

9.	Fit the servo pump.