Bosch rexroth 1 Series - 14.2 Malfunction table

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RE 93100-01-B/2019-09-10, A20V(L)O Series 1, Bosch Rexroth AG
14.2 Malfunction table
Table 21: Axial piston unit malfunction table
Malfunction Possible cause Remedy
Unusual noises 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
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
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
Drive speed too high Machine/system manufacturer:
Reducedrivespeed
Wrong direction ofrotation Machine/system manufacturer: Check correct
direction ofrotation, see chapter 7.4.1
"Preparation" onpage36
Improper mounting oftheaxial piston unit Check themounting oftheaxial piston unit
according tothe specifications ofthemachine/
system manufacturer – observe tightening
torques
Improper mounting ofassembled parts,
hydraulic lines orimproper installation
ofthecoupling
Fasten assembled parts according tothe
information provided bythecoupling fitting
manufacturer
Valve and controller vibrate Optimize theadjustment ofthecontroller
oftheaxial piston unit and thepressure
limitation inthe hydraulic system
Mechanical damage tothe axial piston unit
(e.g.bearing damage)
Replace axial piston unit
Contact BoschRexroth Service
Increased, unusual vibration Bearings worn Contact BoschRexroth Service