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AVANT 420 - Troubleshooting Common Issues

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37
400 Series
Troubleshooting
Problem Possible cause Remedy
Engine does not crank
Main switch off Turn on the main switch
Battery discharged, battery voltage
too low
Check and charge
Blown fuse
Check fuses. If fuse blows again, find out the cause.
Contact service
Battery cables poorly connected
Check battery cables and posts, clean and retighten if
necessary
Engine cranks but does not start, or
starts and stops immediately
No fuel or wrong type of fuel Fill the tank with correct type of fuel.
Engine does not get fuel, clogged fuel
filter or fuel line
Fill the tank with correct type of fuel.
Make sure that the fuel hoses and fuel filter are clean and
have not been frozen. Replace fuel filter, clean fuel lines.
Cold ambient temperature
Hold ignition key in glow position for longer period.
If glow indicator lamp is lit, allow it to turn off before
starting. Extend starting time up to 5 seconds. (Diesel)
Use correct type of engine oil
Auxiliary hydraulics control lever is in
locking position.
Turn the lever in center (neutral) position.
Battery discharged or damaged.
Jump start with another battery (See page 34), then
charge the battery or replace if damaged
Engine overheats
Clogged radiator Clean radiator and fan from engine side
Coolant level low Add coolant
Leaking cooling system
Check coolant pressure reservoir cap for tightness.
Check cooling system and all hoses and connections.
Hydraulic system overheats
Hydraulic oil level low Check and refill, see page 30
Clogged oil cooler Clean cooler and fan
Fan faulty Check and clean, repair if necessary
Hydraulic oil flow restricted
Make sure auxiliary hydraulics valve is completely opened
when using high flow attachments. Adjust lever locking
plate if necessary.
Hydraulic system overloaded
Use attachment at lower engine rpm, use with 1-pump
setting, check attachment for faults.
The loader does not move even
after the parking brake has been
released.
The pins of the parking brake
mechanism have not locked properly in
the wheels.
Drive slowly forward or backward in order to lock the
parking brake.
Parking brake engages the front wheels.
When releasing the parking brake do this in opposite
order. If the machine must stay in a slope, park it so that
the heavier end is on downhill side.
Troubleshooting

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