RE 92110-01-B/2022-03-22, Bosch Rexroth AG
Assembly |
A4VSH series 1x and 30 31
/64
7�3�2 Inside-reservoir installation
NOTICE
Risk of damage with inside-reservoir installation!
To prevent damage to the axial piston unit, all plastic parts (e.g. protective plugs,
covers), except for the tamper-proof caps, must be removed prior to installation
in the reservoir.
▶ Remove all plastic parts, except for the tamper-proof caps, before you install
the axial piston unit in the reservoir. Make sure that no parts of them remain in
the reservoir.
▶ Remove the protective cover from port
S
A
,
S
B
of the anti-cavitation valve and
open at least one
K
port.
Inside-reservoir installation is when the axial piston unit is installed in the
reservoir below the minimum fluid level. The axial piston unit is completely below
the hydraulic fluid.
If the minimum fluid level is equal to or below the upper edge of the pump,
see chapter 7.3.3 "Above-reservoir installation" on page 32.
Axial piston units with electric components (e.g. electric controls, sensors)
must not be installed in a reservoir below the fluid level.
Exceptions are control HS5M and EO2M. The proportional valve can be
positioned separately in the system and piped up via the designated ports
X
1
and
X
2
of the pump. The unit can be installed in the reservoir together with
the directly mounted position transducer. Approved for HLP fluids DIN 51524.
In case of small reservoir sizes or unfavorable suction conditions,
we recommend providing the anti-cavitation valve port
S
A
and
S
B
with a suction
pipe with connection of the drain port
T
,
R(L)
,
K
2
or
K
3
. In this case, the other
drain port must be plugged. The housing of the axial piston unit must be filled
before fitting the piping and filling the reservoir with hydraulic fluid. To prevent
draining of the housing, the reservoir has to be filled with hydraulic fluid as
soon as possible.
