Terex MHL360 E - Loading Equipment Is Not Working; Drop in Machines Performance; Machine Working too Slowly and Hydraulic Oil Is Becoming Hot

8 TROUBLESHOOTING
8.8 MHL360 E
Possible Cause
Remedy
8.9.8 Loading equipment is not working
1
All travel and work functions are disabled.
Enable travel and work functions
h Chapter 5.19.10 Disabling travel and work
functions
2
Armrest switch faulty.
Check the armrest switch and repair or replace
if necessary.
3 Oil supply to hydraulic pump interrupted. Check lines.
4
Hydraulic pump has failed.
Have the hydraulic pump checked by a special-
ist, replace complete pump if necessary.
5
Main pressure relief valve has failed or is set
incorrectly.
Have the main pressure relief valve checked by
a specialist, replace complete pump if neces-
sary.
6
Engine temperature is too high.
Allow engine to cool
h Chapter 5.21 Monitoring the machine during
operation
8.9.9 Drop in machine’s performance
1
Insufficient motor power.
Check the diesel engine.
2
Insufficient hydraulic oil level.
Top up hydraulic oil to mark on sight glass.
3
Pump is sucking in air.
Retighten the hose connections. Replace O-
ring or seals.
4
Insufficient working pressure.
Have the main pressure relief valve adjusted by
a specialist; replace pump if necessary.
5 Fine mode not set to 0. Check the load limit sensing control. Check if
fine mode is set to 0; set to 0 if necessary.
8.9.10 Machine working too slowly and hydraulic oil is becoming hot
1
Main pressure relief valve set too low or
faulty.
Have the main pressure relief valve adjusted by
a specialist; replace pump if necessary.
2
Unacceptable wear of hydraulic pump.
Replace hydraulic pump.
3 Incorrect hydraulic oil. Quality of hydraulic oil must conform to our rec-
ommendation.
4 Insufficient hydraulic oil level. Top up hydraulic oil to mark on sight glass.
5
Oil cooler dirty or damaged.
Clean oil cooler, check and replace if neces-
sary.
6
Air in hydraulic system.
Vent the pilot control.
Tighten connections with engine off and system
relieved of pressure.