Dynapac DFP10D, Operating Instructions And Maintenance Instructions

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10.2 Engine malfunctions
Fault Possible cause Remedy
The engine is hard
to start or does not
start at all.
Shut-off device in STOP position Pull the shut-off device gently to move it
to operating position.
No fuel at the injection pump Check the fuel level; top up if necessary.
Check the fuel lines.
Check the fuel filter; replace if necessary.
Injection nozzle out of order Have it checked by qualified expert per-
sonnel.
Incorrect valve clearance Check the valve clearance; adjust if nec-
essary.
Cylinder or piston rings worn Have it checked by qualified expert per-
sonnel.
Engine does not
start or starts poorly
at low tempera-
tures.
Paraffin sweats in the fuel due to insuffi-
cient low temperature resistance
Use winter-grade fuel
Engine oil with wrong SAE viscosity class Changing the engine oil
Engine does not
crank when oper-
ating the recoil
starter.
Recoil starter defective Replace the recoil starter.
Spring broken Replace the recoil starter.
The starter rope
does not return to
the initial position
Recoil starter dirty Clean the recoil starter.
Insufficient pretension of the spring Check the pretension of the spring; adjust
if necessary.
Spring broken Replace the recoil starter.
Engine starts up,
but does not run.
Fuel filter clogged Check the fuel filter; replace if necessary.
Engine stops. Fuel tank empty Check the fuel level; top up if necessary.
Fuel filter clogged Check the fuel filter; replace if necessary.
Tank ventilation blocked Ensure sufficient ventilation of the tank.
Air in the fuel system Check the fuel system for air ingress.
Check the ventilation valve.
Mechanical defect Have it checked by qualified expert per-
sonnel.
Engine looses
power and speed.
Fuel tank empty Check the fuel level; top up if necessary.
Tank ventilation blocked Ensure sufficient ventilation of the tank.
Air in the fuel system Check the fuel system for air ingress.
Check the ventilation valve.
Engine loses power
and speed; exhaust
smoke is black.
Air filter contaminated Clean; replace if necessary
Troubleshooting – Engine malfunctions
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