MALFUNCTION 8
MHL380 D 8.7
8.8.5 No driving function
Insufficient hydraulic fluid in tank.
Top up hydraulic oil to mark on viewing glass.
Hydraulic pump has failed.
Have the pump examined by a specialist for
mechanical damage.
Replace the entire hydraulic pump.
Examine to discover cause of fault.
Main pressure relief valve is faulty or set in-
correctly.
Have the main pressure relief valve replaced by
a specialist.
Have a specialist check the pilot pressure and
locate the problem.
Solenoid valve defective.
Have the solenoid valve checked by a special-
ist; repair or replace as required.
Power supply to solenoid valve interrupted.
Have the power supply to the solenoid valve
checked by a specialist and repaired if neces-
sary.
Mechanical connection to axle interrupted.
Service or parking brake engaged.
8.8.6 Sluggish acceleration and deceleration, too little pull
1 Engine does not have sufficient power. Check the diesel engine.
2 One of the brakes is sticking. Check, correct fault.
3 Main pressure relief valve is faulty or set in-
correctly.
Have the pressure checked by a specialist. Ad-
just the main pressure relief valve and replace if
necessary.
Oil loss in rotary transmission.
Replace rotary transmission seal.
Clean air cleaner and replace if necessary.
High pressure level is too low.
Check high pressure, replace or adjust HP
valves as necessary.
Pump does not travel fully.
Have the pump checked by a specialist; adjust
if necessary.
Internal damage to variable displacement
pump or engine.
Have the units replaced by a specialist.