RE 92110-01-B/2022-03-22, Bosch Rexroth AG
Troubleshooting |
A4VSH series 1x and 30 59
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Table 14: Axial piston unit malfunction table
Malfunction
Possible cause
Remedy
No or insufficient pressure
Insufficient air bleeding of the hydraulic
system
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
Faulty mechanical drive (e.g. defective coupling) Contact machine/system manufacturer
Drive power too low
Contact machine/system manufacturer
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, suction filter too
small or blocked, etc.
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
Check the filter system and change the filter as
necessary
Hydraulic fluid not in optimal viscosity range
Machine/system manufacturer:
Check temperature range and use suitable
hydraulic fluid
Insufficient boost pressure
Check boost pressure
Contact Bosch Rexroth Service
Insufficient pilot pressure or control pressure
Check pilot pressure or control pressure
Contact Bosch Rexroth Service
Malfunction of the control device or controller
of the axial piston unit
Contact Bosch Rexroth Service
Control of the control device defective
Check control (contact machine/
system manufacturer or Bosch Rexroth Service)
Wear or mechanical damage to the axial
piston unit
Replace axial piston unit
Contact Bosch Rexroth Service
Output unit defective
(e.g. hydraulic motor or cylinder)
Contact machine/system manufacturer
