Malfunction Table - Bosch rexroth A15VO Instruction Manual

Table 12: 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,
e.g., 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
Resonances due to a defective or unsuitable
elastic coupling
Valves and controller vibrate
Mechanical damage to the axial piston unit
(e.g. bearing damage)
Bearings worn
Troubleshooting | A15VO/A15VLO series 12
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, e.g. 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 30
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
Optimize the adjustment of the controller 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 92512-01-B/2023-03-27, Bosch Rexroth AG
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