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Table 14: Axial piston unit malfunction table
Malfunction
Unusual noises
Increased, unusual vibration
14.2 Malfunction table
Possible cause
Insufficient air bleeding of the hydraulic system
Insufficient suction conditions, for example,
insufficient dimensioning of the suction line,
viscosity of the hydraulic fluid too high,
suction height too high, suction pressure
too low, foreign particles in the suction line,
impermissible filter in the suction line
Drive speed too high
Wrong direction of rotation
Improper mounting of the axial piston unit
Improper mounting of assembled parts,
hydraulic lines or improper installation of the
coupling
Valve and controller vibrations
Mechanical damage to the axial piston unit
(e.g. bearing damage)
Bearings worn
Remedy
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
Machine/system manufacturer: check the
system, for example, optimize inlet conditions,
use suitable hydraulic fluid
Fill the suction line with hydraulic fluid
Remove foreign particles from the suction line
Machine/system manufacturer: Reduce drive
speed
Machine/system manufacturer: Check correct
direction of rotation; see chapter 7.4.1
"Preparation" on page 31
Check the mounting of the axial piston unit
according to the specifications of the machine/
system manufacturer – observe tightening
torques
Mount assembled parts according to the
information provided by the coupling fitting
manufacturer
Optimize the adjustment of the axial piston
unit and the pressure limitation in the hydraulic
system
Replace axial piston unit
Contact Bosch Rexroth Service
Contact Bosch Rexroth Service
RE 92701-01-B/04.2018, A10VO, A10VSO Series 31, Bosch Rexroth AG
Troubleshooting
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