Bosch 70 Series - 7.3 Installation Position

26/52 Installation
Bosch Rexroth AG, A2FM/A2FE Series 70, RE 91071-01-B/03.2015
▶ Make certain that the drain line, and return line flow into the reservoir below the
minimum fluid level in all operating conditions. This prevents foaming.
▶ Make sure that the working environment at the installation site is fully free of dust
and foreign substances. The axial piston unit must be installed in clean condition.
Contamination of the hydraulic fluid can considerably affect the function and
service life of the axial piston unit and its suitability for use in explosive areas.
▶ Use lint-free cloths for cleaning.
▶ Use suitable mild cleaning agents to remove lubricants and other difficult-to-
remove contamination. Cleaning agents must not enter the hydraulic system.
7.3 Installation position
The following installation positions are permissible. The piping layout shown
illustrates the basic layout.
7.3.1 Below-reservoir installation (standard)
Below-reservoir installation is when the axial piston unit is installed outside of the
reservoir below the minimum fluid level.
Recommended installation position: 1 and 2.
Also bleed air through air bleed port R when installing with the “drive shaft upwards”
(special version).
T
1
h
t min
h
min
T
2
h
t min
h
min
T
1
h
t min
h
min
T
2
R
h
t min
h
min
1 2 3 4
Fig. 6: Below-reservoir installation A2FM with installation position 1–4
T
1
, T
2
Highest drain port
h
min
Minimum required distance to
reservoir bottom (100mm)
h
t min
Minimum required immersion depth (200mm)
Table 8: Below-reservoir installation
Installation position Air bleeding Filling
1 (drive shaft horizontal) – T
1
2 (drive shaft horizontal) – T
2
3 (drive shaft, vertically downward) – T
1
4 (drive shaft vertically upward) R T
2