Bosch rexroth A4VSO 10 Series User Manual

Troubleshooting 69/72
RE 92050-01-X-B1/2019.08.23, Axial piston variable pump A4VSO, BoschRexrothAG
Table 18: Axial piston unit malfunction table
Malfunction Possible cause Remedy
No orinsufficient pressure Insufficient air bleeding ofthehydraulic system Axial piston unit, suction line for the
hydraulicpump and filling 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
hydr
aulic 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

Bosch rexroth A4VSO 10 Series Specifications

General

Brand	Bosch
Model	rexroth A4VSO 10 Series
Category	Water Pump
Language	English