30/56 Installation
Bosch Rexroth AG
, MCR Series 30, 31, 32, 33 and 41, RE 15215-01-B/11.2015
7.3.2 Above-reservoir installation
Above-reservoir installation means that the radial piston motor is installed above the
minimum fluid level of the reservoir.
Recommendation for installation position 6 and 8:
A check valve in the case drain line (opening pressure 0.5 bar) can prevent
draining of the motor’s case.
L
L
1
5
6
L
7
8
L
L
1
L
L
1
F
F
F
F
0.5 bar
0.5 bar
Fig. 17: Above-reservoir installation MCR with installation position 7–12
L
Drain port
F
Filler port
L
1
Air bleeding
Note: L
1
is part of the external piping
The oil filling of the case should always take place via the filler port
F
and the air
bleeding via port
L
1
in the drain line.
Where a check valve is fitted to the drain line, it should be sized to ensure the
motor’s case pressure limit is not exceeded at start-up.
Note: when the pistons are pushed out of the cylinder block at start-up, this
displaces oil from the motor case, momentarily delivering full pump flow to the drain
line.
