Bosch Rexroth RE 90300-B - Page 58

58/64 Axial piston units | Troubleshooting
Bosch Rexroth AG, RE90300-B/2021-01-19
Table 10: Axial piston motor malfunction table
Malfunction Possible cause Remedy
Rotational speed or torque cannot
be reached
Insufficient flow in hydraulic pump Check function of the hydraulic pump
Minimum ormaximum displacement set
incorrectly
Contact BoschRexroth Service
Control of the control device defective Check control (machine/system manufacturer)
Insufficient pilot pressure or control pressure Check pilot pressure or control pressure
Contact BoschRexroth Service
Malfunction in the axial piston motor control
device or controller
Contact BoschRexroth Service
Hydraulic fluid not in optimal viscosity range Machine/system manufacturer:
Check temperature range and use
suitableh
ydraulic fluid
Wear or mechanical damage to the axial piston
motor
Replace axial piston unit
Contact BoschRexroth Service
Wear or mechanical damage to the hydraulic
pump
Replace hydraulic pump
Contact BoschRexroth Service
Wrong direction of rotation Check function of the hydraulic pump
Machine/system manufacturer: Check correct
direction of rotation, seechapter1.1.10
"Preparation" on page32
Excessively high temperature of
hydraulic fluid and housing
Excessively high inlet temperature at the axial
piston unit
Machine/system manufacturer: Inspect system,
e.g.malfunction in the cooler, insufficient
hydraulic fluid in the reservoir
Wrong setting and/or malfunction of the
pressure limitation and pressure control
valves (e.g.high-pressure relief valve,
pressurecontroller)
Optimize the adjustment of the pressure
limitation and pressure control valves of the
axial piston unit and the pressure safeguarding
in the hydraulic system
Contact BoschRexroth Service
Contact machine/system manufacturer
Output speed too high Contact machine/system manufacturer
Flushing flow of the flushing valve too low Contact BoschRexroth Service
Axial piston unit worn Replace axial piston unit; contact BoschRexroth
Service