Husqvarna P 520D Operator's Manual page 139

Problem
The product release black smoke
The product release blue smoke
The product release white smoke
The engine apparently has no power
The transmission does not have suffi-
cient power
The battery does not charge
There is vibration in the product
740 - 002 -
Cause
The fuel injector is defective.
There is incorrect fuel type in the fuel tank.
The air filter is clogged. Refer to
129 .
The injection pump is defective.
The engine oil level is too high.
The engine is defective.
The cylinder in the engine is defective.
The engine oil level is too high.
The air filter is clogged. Refer to
129 .
The fuel filter is clogged. Refer to
There is air in the fuel system.
The relief valve is defective.
The feed pressure is too low.
The feed pump is defective.
The timing of the fuel injection pump is defective.
The engine is defective.
The transmission cold air intake or the cooling fins are blocked.
There is no oil in the transmission or the oil level is too low. Refer to
check of the transmission oil level on page 135 .
The battery is defective. Speak to your Husqvarna service agent.
The connection at the cable connectors on the battery terminals is bad.
The blades are loose. Refer to
One or more of the blades are not balanced. Refer to
on page 133 .
The engine is loose.
The bevel gear is loose.
The hydraulic pump is loose.
The engine is defective.
The drive shaft is defective.
To clean and replace the air filter on page
To clean and replace the air filter on page
To replace the fuel filters on page 129 .
To examine the blades on page 133 .
To examine the blades
To do a
139