Start the engine and let it idle.
Turn the steering wheel in both directions from lock to lock and hold for a short time. This creates the greatest pressure in the pipes.
In this position, carry out a visual inspection of the following elements:
- piston valve.
- sealing the toothed rack. At the same time, loosen the clamp and move the casing to the side.
- vane pump.
- pipeline connection points.
Vane servo pump, 4-cylinder engine
1 - tension lever
2 - cylindrical bolt, 20 Nm
3 - V-belt
Size for petrol engine: 9.5x850 mm; for diesel: 9.5x800 mm.
4 - bolt with clamping nut
5 - V-belt pulley
Install so that the "5-Z" marking on the front side is visible. The crankshaft and vane pump pulleys must lie in the same plane.
6 - bolt, 20 Nm
7 - bolt, 25 Nm
8 - lining washer
9 - cylindrical bolt, 20 Nm
10 - bracket
11 - Front pivot arm
12 - nut, 20 Nm
Self-locking, always replace
13 - nut, 20 Nm
14 - bolt, 20 Nm
15 - rear pivot arm
16 - lining washer
17 - Hex bolt
18 - lining washer
19 - Hex bolt
20 - expansion hose
21 - sealing ring Replace.
22 - hollow bolt, 50 Nm
23 - vane pump
24 - suction hose
25 - sealing ring
Replace.
26 - hollow bolt, 50 Nm
27 - bolt, 20 Nm
5-cylinder engine
Since mid-1990, in addition to ZF vane pumps, Vickers pumps have been manufactured. The parts and brackets are not to be confused with each other.
1 - hollow bolt, 45 Nm
2 - sealing ring Replace.
3 - expansion hose
4 - self-locking nut, 20 Nm Replace.
5 - Hex bolt
6 - bracket
7 - tension bolt
8 - V-belt Size: 12.5x992.
9 - V-belt pulley
Install so that the "5-Z" marking on the front side is visible. The crankshaft and vane pump pulleys must lie in the same plane.
10 - Hexagon bolt, 20 Nm
Cylindrical bolt 25 Nm (Vickers).
11 - tension lever
12 - cylindrical bolt 25 Nm
13 - hollow bolt, 50 Nm
14 - sealing ring
Replace.
15 - suction hose
16 - Hex Bolt
17 - rear pivot arm
18 - sealing ring
19 - sealing ring
Before installation, fill the suction side with oil and rotate the pump by hand until oil comes out of the discharge side.
20 - self-locking nut, 20 Nm
Replace.
21 - Hexagonal nut, 20 Nm
22 - Front Pivot Arm