Bosch A4VG A4VG 32 Series Instruction Manual page 33

▶ Make certain 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 certain that a minimum suction pressure of 0.8 bar absolute is present
at port "S" (0.5 bar absolute for cold start) during operation in all installation
positions and installation locations for the axial piston pump, see Fig. 9. See data
sheet for pressure values.
1 2
0
3
1
Fig. 9: 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 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.
0 1
-1
2
2
S
RE 92003-01-B/12.2015, A4VG Series 32, Bosch Rexroth AG
Installation 33/68