Axial Piston Pump Malfunction Table - Bosch Rexroth RE 90300-B Instruction Manual

Table 9: Axial piston pump malfunction table
Malfunction
Unusual noises
Increased, unusual vibration

14.2 Axial piston pump 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 or contaminated filters 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 vibrate
Mechanical damage to the axial piston unit
(e.g. bearing damage)
Bearings worn
Troubleshooting | Axial piston units
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
If necessary, check the filter system and replace
the filter
Machine/system manufacturer: Reduce drive speed
Machine/system manufacturer: Check correct
direction of rotation, see chapter 1.1.10
"Preparation" on page 32
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
Optimize the adjustment of the controller of the
axial piston unit and the pressure limitation in the
hydraulic system
Air bleed the axial piston unit and hydraulic system
Contact Bosch Rexroth Service:
Optimize the setting of the pressure limitation and
pressure control valve
Replace axial piston unit
Contact Bosch Rexroth Service
Contact Bosch Rexroth Service
RE 90300-B/2021-01-19, Bosch Rexroth AG
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