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 hydraulic 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
