Removal of a electro-hydraulic 7.8
operation W200
Removal of the proportional valve
Unscrew the solenoide (24 mm open end spanner).
Reassembly:
replace the 3 solenoide o-rings,1.
torque for the solenoide: 45 ± 10% N.m.2.
Removal of the housing
Remove the 4 mounting screws (4 mm socket wrench).
Remove:
the housing •
the 3 o-rings •
Reassembly:
replace the 3 housing o-rings,1.
reassemble parts in reverse order.2.
torque for mounting screws : 6 ± 10% N.m.3.
The control block does not need to be removed from the machine to
perform this operation.
DANGER
Oil pressure
Machine off:
place all of the machine’s actuators connected to the control block in f
neutral position,
release stored pressure by operating all the spools. f
NOTICE
Environment damages risk
Install a vacuum pump on the tank to limit oil leakage during this f
operation.
Collect possible leaks with a suitable receptacle. f
28/30 Bosch Rexroth AG Type SM 12 | RE 64122-S/06.2011
Distribution element repair procedure
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