Company Registered in England No: 4167649 VAT Registration No: 732 5692 25 BS EN ISO 9001:2008 No: LRQ 0964389
+44 (0)1204 699 959
Hyquip Limited New Brunswick Street Horwich Bolton Lancashire BL6 7JB UK
www.hyquip.co.uk
/web/index
Troubleshooting 51/56
RE 91606-01-B/07.2013, A6VE Series 63,
Bosch Rexroth AG
14.2 Malfunction table
Table 16: Axial piston unit malfunction table
Malfunction
Possible cause
Remedy
Unusual noises
Insufficient bleeding of the hydraulic system
Axial piston unit, suction line for the hydraulic
pump and filling the reservoir
Completely air bleed 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 the accessory parts,
hydraulic lines or wrong installation of the
coupling
Fix attachment parts according to the
information provided by the coupling or fitting
manufacturer
Mechanical damage to the axial piston unit
(e.g. bearing damage)
Replace axial piston unit
Contact Bosch Rexroth Service
No or insufficient flow
Insufficient bleeding of the hydraulic system
Axial piston unit, suction line for the hydraulic
pump and filling the reservoir
No or insufficient pressure
Insufficient bleeding of the hydraulic system
Axial piston unit, suction line for the hydraulic
pump and filling 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 (machine/system manufacturer
or contact 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
resp. instabilities
Insufficient bleeding of the hydraulic system
Axial piston unit, suction line for the hydraulic
pump and filling the reservoir
Completely air bleed axial piston unit and
hydraulic system
Check correct installation position
Unstable control signal
Contact machine/system manufacturer
resp. Bosch Rexroth-Service
Malfunction of the control devices or the
controller
Contact Bosch Rexroth Service
