Installation 41/104
RE 92076-01-B/10.2017, A4... with HS5E pilot control valve/Series 3x, Bosch Rexroth AG
▶ Make sure that the suction, drain, and return lines flow into the reservoir below
the minimum fluid level in all operating conditions. This will prevent air from
being drawn in and foam from being formed.
▶ Make sure that a minimum suction pressure of 0.8bar absolute (without charge
pump) or 0.7bar absolute (with charge pump) absolute is present at port “S”
during operation and at cold start, in all installation positions and installation
locations for the axial piston pump, see Fig. 11. See data sheet for pressure
values.
-0.2
0.8 abs.
1
2
3
0
0
1
2
-1
21
S
Einschraubloch M22
M10 (x1.5)
M16 (x2)
M16 (x2)M16 (x2)
M16 (x2)
M8 (x1.25)
Fig. 11: Suction pressure
1 Absolute pressure gauge
2 Standard pressure gauge (relative)
The suction conditions improve with below-reservoir installation
▶ Make sure that the working environment at the installation site is completely
free of dust and foreign substances. The axial piston unit must be installed in
a clean condition. Contamination of the hydraulic fluid can considerably affect
the function and service life of the axial piston unit.
▶ Use fiber-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.
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