Husqvarna PT26 D 用户手册

70

Fuel system with in-line pump has excellent 
operational reliability as long as the fuel is kept clean. 
If contaminated fuel is filled or enters the system in the 
incorrect manner, the risk of malfunction or wear/
damage to the injection pump increases. 
Contaminants include dust particles or in the form of 
liquid, such as water or petrol.

The fuel in the tank is drawn up by the feed pump and 
pushed through the fuel filter to the injection pump’s 
fuel chamber. The feed pump supplies a greater 
quantity of fuel than the injection pump requires. 
Consequently, there is an overflow pipe on the 
injection pump, which leads off surplus fuel and 
maintains the feed pressure in the fuel chamber. The 
excess is routed away via the injector’s leak oil line 
back to the tank.

There is a hand pump on the fuel filter, which is used 
to bleed the fuel system.

The injection pump pumps fuel to the injectors, which 
are opened by the pressure and then spray the fuel 
into the prechambers, where it is ignited by the 
compression heat.