REXROTH A4VG - Page 21

RE 92004-01-S031/08.2015 | A4VG Series 40 Bosch Rexroth AG 21/40
Valves
To replace the valve seal and the valve insert:
1. Loosen the high pressure relief valve (6) and screw the high pressure relief
valve (6) out of the pump case (7).
2. Extract the valve insert (5) with the pressure spring (3) out of the threaded
plug (1).
3. Check the O-rings and O-ring grooves for damage, wear or contaminants.
4. Exchange the O-rings (2+4) for new ones.
5. Check the valve insert for damage, wear and contaminants.
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Fig. 11: Valve setting mark
1 Threaded plug
2 O-ring
3 Pressure spring
4 O-ring
5 Valve insert
6 High pressure relief valve
7 Pump case
Checking the valve setting DP of the valve insert with the target pressure
value as per the order documentation.
6. Replace the valve insert (5).
7. Insert the valve insert (5) with pressure spring (3) into the threaded plug (1).
8. Screw the high pressure relief valve (6) into the pump case (7).
Procedure