Malfunction Table - Bosch rexroth A36VM Instruction Manual

50/54 A36VM | Troubleshooting
Table 13: Axial piston unit malfunction table
Malfunction
Unusual noises
Increased, unusual vibration
No or insufficient pressure
Pressure/flow fluctuations/
instabilities
Bosch Rexroth AG, RE 91650-01-B/2021-07-19
14�2 Malfunction table
Possible cause
Insufficient air bleeding of the hydraulic system Fill the axial piston unit, suction line for the
Output speed too high
Improper mounting of the axial piston unit
Improper mounting of assembled parts,
hydraulic lines or improper installation of
the coupling
Resonances due to a defective or unsuitable
elastic coupling
Mechanical damage to the axial piston unit
(e.g. bearing damage)
Bearings worn
Insufficient air bleeding of the hydraulic system Fill the axial piston unit, suction line for the
Faulty mechanical output drive
(e.g., defective coupling)
Drive power too low
Malfunction of the control device or controller
of the axial piston unit
Control of the control device defective
Wear or mechanical damage to the
axial piston unit
Drive unit defective (e.g. hydraulic pump)
Insufficient air bleeding of the hydraulic system Fill the axial piston unit, suction line for the
Unstable control signal
Malfunction in the control devices or the
controller
Remedy
hydraulic pump and the reservoir
Completely air bleed the axial piston unit and
hydraulic system
Check correct installation position
Machine/system manufacturer: Reduce output
speed
Check the mounting of the axial piston
unit according to the specifications of the
machine/system manufacturer – observe
tightening torques
Fasten assembled parts according to the
parameters provided by the coupling fitting
manufacturer
Check the specification of the elastic coupling
and/or exchange defective or worn coupling
Replace axial piston unit
Contact Bosch Rexroth Service
Contact Bosch Rexroth Service
hydraulic pump and the reservoir
Check correct installation position
Contact machine/system manufacturer
Contact machine/system manufacturer
Contact Bosch Rexroth Service
Check control (contact machine/system
manufacturer or Bosch Rexroth Service)
Replace axial piston unit
Contact Bosch Rexroth Service
Contact machine/system manufacturer
hydraulic pump and the reservoir
Completely air bleed the axial piston unit and
hydraulic system
Check correct installation position
Contact machine/system manufacturer or
Bosch Rexroth Service
Contact Bosch Rexroth Service