RE 90300-B/2021-01-19, Bosch Rexroth AG
Installation |
Axial piston units
31
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7.3 Installation position
Detailed notes about permissible installation positions and locations for your axial
piston unit can be found in the product-specific instruction manual and in the
product-specific data sheet.
7.3.1 Below-reservoir installation (standard)
Below-reservoir installation means that the axial piston unit is installed outside of
the reservoir below the minimum fluid level.
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 plug from the suction port
S
and open at least one case
drain/air bleed 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 31.
Axial piston units with electric components (e.g. electric controls, sensors) must
not be installed in a reservoir below the fluid level.
We recommend fitting a suction pipe to the suction port
S
and fitting a pipe to
the highest drain port. In this case, the other leakage ports 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 quickly as possible.
7.3.3 Above-reservoir installation
Above-reservoir installation means that the axial piston unit is installed above
the minimum fluid level of the reservoir.
Observe for axial piston pumps the maximum permissible suction
height h
S max
= 800 mm. The permissible suction height h
S
is derived from the
total pressure loss.
