Troubleshooting - Hitachi EX27U Operator's Manual

INDEX

TROUBLESHOOTING

If any problem is found, troubleshoot to pinpoint the cause
and take appropriate action to prevent the problem from
occurring again. If the cause cannot be pinpointed, contact
your authorized dealer.
1. Engine
Trouble
Engine does not start.
Engine stalls.
Low engine oil pressure (Engine oil
pressure indicator comes on)
Engine knocks or runs irregularly.
Engine overheats
2. Electrical System
Trouble
Starter does not rotate.
Alternator indicator does not go off
after engine is started.
Monitor indicators do not come on
or gauges do not operate.
Travel mode does not shift from
fast mode to slow mode and/or
vice versa.
TROUBLESHOOTING
Cause
• Starter does not rotate
• Engine is too cold
• Incomplete air bleeding from the
fuel system
• No fuel in the fuel tank
• Fuel filter restriction
• No fuel in the fuel tank
• Air in the fuel system
• Insufficient engine oil
• Oil leak at connections
• Oil pressure switch failure
• Fuel filter restriction
• Air in the fuel system
• Air cleaner restriction
• Insufficient coolant and/or cool-
ant leak
• Loose fan belt or oil on fan belt
• Radiator fins are clogged or bent
• Thermostat failure
Cause
• Harness failure
• Low battery power
• Loose or corroded battery con-
nections
• Key switch failure
• Alternator failure
• Harness failure
• Blown fuse
• Sensor failure
• Harness failure
• Burned indicator bulb(s)
• Shift switch failure
• Harness failure
• Switch valve failure
11-1
CAUTION: Never attempt to adjust, disas-
semble, or repair hydraulic or electrical
components by yourself.
Solution
• If the battery power is low, re-
charge or replace the battery.
• If the starter has failed, repair or
replace.
• If the connections are loose or
corroded, clean and tighten.
• Preheat the engine or warm up
coolant. (Pour some hot water into
the cooling system.)
• Thoroughly bleed air.
• Refuel.
• Clean or replace the fuel filter.
• Refuel.
• Re-tighten connections and bleed.
• Add oil.
• Repair.
• Replace.
• Clean or replace the filter.
• Re-tighten connections and bleed.
• Clean or replace the element.
• Add coolant. Repair leak.
• Adjust or replace the fan belt.
• Clean and/or repair.
• Replace.
Solution
• Inspect and repair.
• Charge the battery.
• Clean and tighten.
• Replace.
• Replace
• Inspect and repair.
• Replace
• Replace
• Inspect and repair.
• Replace
• Replace
• Inspect and repair.
• Replace