Lightly press the back cover of the pump housing with a press and remove the retaining ring.
Remove the cover, pressure spring and O-ring.
Remove the front cover and sealing ring and take out the rotor-stator assembly.
Check the condition of the parts, if necessary, replace the rotor-stator assembly. Replace the O-rings each time the pump is disassembled.
Install the rotor-stator assembly in the pump housing, install and secure the front cover, ensuring its correct position (see photo).
Remove the pulley, snap ring and press out the pump drive shaft.
Replace the sealing ring and, if necessary, the needle bearing, ensuring that it is sunk «A» (see picture), equal to 37 + 0.2 mm.
Check the condition of the bearing on the shaft and, if necessary, replace it.
Remove and flush the valve plug and replace if necessary. When replacing, install a plunger of the same size group (1 or 2), the mark of which is stamped on the pump housing (see photo).
Install the pump, adjust the drive belt tension and bleed the air from the hydraulic drive (see above).
From model year 1978, install the power steering pump with the following in mind:
- the discharge pipeline must be fastened so that it does not touch the engine mount bracket;
- tighten the discharge pipe union with tool 34-3-151 and the suction pipe union with tool 34-3-152.