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Maintenance and repair
Unloading the valve while
it remains in the system
Bosch Rexroth AG, DBD...1X/..E, RE 25402-B/10.21
Fig. 6: Loosening the locking
1.
Release the locking of the adjustment spindle (2):
release the lock nut (1) by means of an open-end wrench by rotating it
counterclockwise.
2.
Purging the safety valve:
Screw out the adjustment spindle (2) to the stop by rotating the rotary
knob (3) counterclockwise. Now allow free flow through the safety valve for
approx. 5...10 seconds so that dirt particles that might exist at the valve seat are
removed by the flow.
3.
Screw in the adjustment spindle (2) by rotating the rotary knob (3) clockwise so
that the lock nut (1) rests against the valve body without any play.
4.
Hold the rotary knob (3) and tighten the lock nut (1) by means of a manual torque
wrench applying the specified tightening torque by rotating it clockwise.
Table 15: Information on the lock nut
Valve type + size
Component marking
Wrench size
Tightening torque
10.3 Repair
Damage to persons and property caused by improper repair!
In case of improper repair, the safety function of the safety valve is no longer given
in subsequent operation.
Only repair measures listed in chap. 10 "Maintenance and repair" are admissible.
f
Only qualified personnel (see chap. 2.4 "Qualification of personnel" may repair
f
the safety valve.
The sealing and/or the safety cap must not be removed.
f
The point with locking paint must not be removed.
f
1
2
DBD4
DBD6
1038
849
17
19
19
10 + 5 Nm
10 + 5 Nm
10 + 5 Nm
WARNING
3
DBD10
DBD20
850, 390
361
19
19
10 + 5 Nm
10 + 5 Nm
DBD30
362
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