REXROTH A4VG - Sealing the Control Cartridge

26/40 Bosch Rexroth AG A4VG Series 40 | RE 92004-01-S031/08.2015
Valves
7.4 Seal control cartridge
This section describes how you seal the control cartridge.
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Fig. 15: Control cartridge
1 Control cartridge
2 O-ring
3 Pump case
To replace the valve seal:
When replacing the SEAL LOCK sealing nut on the adjusting screw for the
beginning of control, re-insert the yellow protective cap.
1. Loosen the control cartridge (1) and screw the control cartridge (1) out of the
pump case (3).
2. Check the O-ring and O-ring groove for damage, wear or contaminants.
3. Exchange the O-Ring (2) for a new one.
4. Screw the control cartridge (1) into the pump case (3).
5. Tighten the control cartridge with 50 Nm.
Procedure