Bosch Rexroth RE 90300-B - Axial piston motor malfunction table

RE90300-B/2021-01-19, Bosch Rexroth AG
Troubleshooting | Axial piston units 57/64
14.3 Axial piston motor malfunction table
Table 10: Axial piston motor malfunction table
Malfunction Possible cause Remedy
Unusual noises Insufficient air bleeding of the hydraulic system Fill the axial piston unit, suction line for the
hydraulic pump and the reservoir
Completely air bleed the axial piston unit and
hydraulic system
Check correct installation position
Output speed too high Machine/system manufacturer: Reduce output
speed
Improper mounting of the axial piston unit Check the mounting of the axial piston
unit according to the specifications of the
machine/system manufacturer – observe
tightening torques
Improper mounting of assembled parts,
hydraulic lines or improper installation of the
coupling
Fasten assembled parts according to the
parameters provided by the coupling fitting
manufacturer
Mechanical damage to the axial piston unit
(e.g.bearing damage)
Replace axial piston unit
Contact BoschRexroth Service
Increased, unusual vibration Bearings worn Contact BoschRexroth Service
No or insufficient pressure Insufficient air bleeding of the hydraulic system Fill the axial piston unit, suction line for the
hydraulic pump and the reservoir
Check correct installation position
Faulty mechanical output drive (e.g., defective
coupling)
Contact machine/system manufacturer
Drive power too low Contact machine/system manufacturer
Malfunction of the control device or controller
of the axial piston unit
Contact BoschRexroth Service
Control of the control device defective Check control (contact machine/system
manufacturer or BoschRexroth Service)
Wear or mechanical damage to the axial piston
unit
Replace axial piston unit
Contact BoschRexroth Service
Drive unit defective (e.g.hydraulic pump) Contact machine/system manufacturer
Pressure/flow fluctuations/
instabilities
Insufficient air bleeding of the hydraulic system Fill the axial piston unit, suction line for the
hydraulic pump and the reservoir
Completely air bleed the axial piston unit and
hydraulic system
Check correct installation position
Unstable control signal Contact machine/system manufacturer or
BoschRexroth Service
Malfunction in the control devices or the
controller
Contact BoschRexroth Service