Malfunction Table - Bosch rexroth HS5E Instruction Manual

94/104 A4... with HS5E(V)(L) control system Series 1x and 30 | Troubleshooting
Table 27: Axial piston unit malfunction table
Malfunction
Unusual noises
Increased, unusual vibration
Bosch Rexroth AG, RE 92076-01-B/2021-04-22

14.3 Malfunction table

Possible cause
Insufficient air bleeding of the hydraulic system Fill the axial piston unit, suction line for the
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
Valve and controller vibrate
Mechanical damage to the axial piston unit
(e.g. bearing damage)
Bearings worn
Remedy
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 45
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
Replace axial piston unit
Contact Bosch Rexroth Service
Contact Bosch Rexroth Service