Opel Frontera UBS. Manual - part 952

2A – 26 POWER STEERING

REASSEMBLY

13. Gear Box

12. O-ring

Apply a thin coat of grease.

11. Seal Ring

Apply a thin coat of grease.

10. O-ring

Apply a thin coat of grease.

9. Ball-nut and Valve Housing Assembly

1) It is strongly advisable to always keep the ball

screw and valve housing assembly in a horizontal
position (avoid holding it vertically), or the rack
piston will fall off onto the end of the worm,
causing the rack piston to slip out of the worm
shaft and ball to fall out.

2) Be careful not to drop the O-ring into the valve

housing.

3) Tighten the valve housing bolts to the specified

torque.

Valve Housing Bolt Torque

N·m (kg·m/lb·ft)

47 (4.8 / 35)

8. Sector Shaft

1)

Tape the sector shaft serrations to protect the
seal ring from damage.

2)

Align the center tooth of ball nut with that of the
sector shaft.

POWER STEERING  2A – 27

7. O-ring

6. Top Cover Assembly

Top Cover Bolt Torque

N·m (kg·m/lb·ft)

47 (4.8 / 35)

5. Lock Nut

Adjust the backlash between the worm gear and the
ball nut.

1) With the worm gear rotating, set it to the straight

ahead position.

2) Set the worm shaft preload to below 1N·m

(10kg·cm / 9 lb·in) with the sector shaft adjusting
screw.

3) Measure the worm shaft preload with the worm

gear turned 450° both to the right and to the left.
The worm gear preload in these positions should
be 0.4 - 0.6 N·m (4 - 6 kg·cm / 3.5 - 5.2 lb·in) lower
than in the straight ahead position.

4) Lock the sector shaft adjusting screw with the lock

nut.

Lock Nut Torque

N·m (kg·m/lb·ft)

41 (4.2 / 30)

4. Oil Seal

Installer: 5-8522-0026-0 (J-26508)

3. Back up Ring

Position the chamfered face (outer circumference)
towards the oil seal.

2. Retaining Ring

position the chamfered face (outer circumference)
toward the oil seal.

1. Dust Cover

2A – 28 POWER STEERING

POWER STEERING PUMP (6VD1, 6VE1 Engine Models)

2

3

22

1

16

15

12

11

5

6

8

7

9

4

17

18

27

25

26

24

19

20

23

21

14

13

10

Disassembly Steps

1.

Bolt

2.

Pipe, suction

3.

O-ring

4.

Connector

5.

O-ring

6.

Valve

7.

Retaining ring

8.

Filter

9.

Spring

10.

Pressure switch

11.

Retaining ring

12.

Shaft assembly

13.

Bearing

14.

Shaft

15.

Retaining ring

16.

Oil seal

17.

Bolt

18.

Rear housing assembly and pump
cartridge

19.

Gasket

20.

O-ring

21.

O-ring

22.

Front housing

23.

Pressure plate

24.

Rotor and vane

25.

Cam

26.

Pin

27.

Rear housing

Reassembly Steps

27.

Rear housing

26.

Pin

25.

Cam

24.

Rotor and vane

23.

Pressure plate

22.

Front housing

21.

O-ring

20.

O-ring

19.

Gasket

18.

Rear housing assembly and pump
cartridge

17.

Bolt

16.

Oil seal

15.

Retaining ring

14.

Shaft

13.

Bearing

12.

Shaft assembly

11.

Retaining ring

10.

Pressure switch

9.

Spring

8.

Filter

7.

Retaining ring

6.

Valve

5.

O-ring

4.

Connector

3.

O-ring

2.

Pipe, suction

1.

Bolt

412RW055

POWER STEERING  2A – 29

DISASSEMBLY

Preparation:
Clean oil pump with solvent (plug the discharge and
suction port, to prevent the entry of solvent). Be careful
not to expose the oil seal of shaft assembly to solvent.

1. Bolt

2. Pipe, Suction

3. O-ring

4. Connector

5. O-ring

6. Valve Assembly

7. Retaining Ring

8. Filter

9. Spring

10. Pressure switch

11. Retaining Ring

12. Shaft Assembly

13. Bearing

14. Shaft

15. Retaining Ring

16. Oil Seal

CAUTION:
When removing the oil seal, be careful not to damage the
housing.

17. Bolt

18. Rear Housing Assembly and Pump Cartridge

19. Gasket

20. O-ring

21. O-ring

22. Front Housing

23. Pressure Plate

24. Rotor and Vane

25. Cam

26. Pin

27. Rear Housing

INSPECTION AND REPAIR

Make all necessary adjustments, repairs, and part
replacements if wear, damage, or other problems are
discovered during inspection.

Rotor

Check that the groove in the vane is free from excessive
wear and that the vane slides smoothly.
When part replacement becomes necessary, the pump
cartridge should be replaced as a subassembly.