Terex TC29, Operating Instructions Manual

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8 Operating Problems
TC29
82
Fault Possible cause Remedy
8.5 Excavator installation is not working
1 Exit barrier lifted or shutoff valve damaged Lower exit barrier and/or check shutoff valve or
replace or repair if necessary.
2 Oil supply to hydraulic pump interrupted Check pipes.
3 Hydraulic pump has failed Have hydraulic pump checked by a specialist
and replace, if necessary
4 Main pressure relief valves have failed or
are mis-adjusted Check main pressure relief valve and replace, if
necessary
8.6 Decrease in machine’s performance
1 Insufficient engine power Check diesel engine.
2 Hydraulic oil level too low Top up hydraulic oil to the mark
3 Pump is sucking up air Tighten hose connections. Replace O-ring or
seals
4 Insufficient operating pressure Re-adjust or replace main pressure relief valves
8.7 Machine is working too slowly and hydraulic oil is becoming too hot
1 Incorrect adjustment of main pressure
relief valves, damaged valves Re-adjust main pressure relief valves or replace
if necessary
2 Hydraulic pump worn Replace hydraulic pump
3 Incorrect hydraulic oil Quality of hydraulic oil must conform to our
recommendation
4 Oil level too low Top up oil to the mark on the sight glass
5 Oil cooler dirty or damaged Clean, check and replace if necessary
6 Air in hydraulic system Tighten connections with engine off and system
relieved of pressure
8.8 Uppercarriage is slewing too far
1 Secondary valves damaged or mis-
adjusted Re-adjust secondary valves and replace if
necessary
2 Swing motor is leaking - internal wear Replace hydraulic motor