We clean the pump from dirt from the outside. We drain the oil from the system, article - Changing the oil in the GAZ-2705 power steering
We wash all parts in gasoline and blow with compressed air (from a pump or compressor).
Use a 24mm wrench to unscrew the plug located above the pump outlet. (For clarity, shown with the pump removed)
Remove the flow valve spring.
Remove the spool.
To prevent oil from leaking out and dirt from getting inside the pump, we install the plug in place.
Use a thin screwdriver to carefully remove the rubber seal from the spool.
Having wrapped the spool body in thin cardboard or a piece of emery cloth, and carefully holding it in a vice, use a 10mm wrench to unscrew the spool seat.
When releasing the spool body from the vice, hold it vertically so as not to lose small parts of the valve
Remove the ball, guide rod and spring from the spool body
We wash all parts in gasoline and blow with compressed air (from a pump or compressor).
Assemble the spool and install it in place in the reverse order