5-36 SHB 28Z3 EN – Edition 2.0 * 28z3s510.fm
Hydraulic system
5.20 Troubleshooting in the hydraulic system
Problem Possible causes
Hydraulic system without function
Defective safety switch on control lever base
Wrong setting of safety switch on control lever base
Defective solenoid valve on pilot oil supply unit
Contaminated solenoid valve on pilot oil supply unit
Hydraulic oil level too low
Defective valve fuses
Defective/interrupted plug and socket connection towards solenoid valve
Hydraulic hammer does not work correctly
Quickhitch couplings not connected correctly
Hydraulic oil quantity too high/too low
Hydraulic oil pressure too high/too low
Check the nitrogen fill
Machine runs in 1st speed only
Defective switch for 2nd speed range
Defective solenoid valve on pilot oil supply unit
Contaminated solenoid valve on pilot oil supply unit
Defective valve fuses
Defective/interrupted plug and socket connection towards solenoid valve
Counterpressure in travelling drive does not drop below control pressure
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