Injection Pump - Volvo Penta D2-55 Workshop Manual

1. Fuel tank 5. Fuel fine filter
2. Primary filter

6. Injection pump

3. Water separator 7. Injectors
4. Feed pump
Fuel system, general
The fuel is sucked from the fuel tank by the feed
pump, through a water separator/pre-filter (extra
equip.) and is pressed through a fine filter to the injec-
tion pump.
Return fuel from the injectors is fed through return fuel
lines, back to the tank.
Injection pump
The injection pump is an in-line flange mounted pump.
The pump is driven by cams on the engine's cam-
shaft, which operates the pump chambers directly.
Centrifugal regulator
The regulator is mechanical and works with speed-
sensitive regulator weighs. It is mounted on the front
of the camshaft gear, from where it is also driven.
The regulator weights operate the injector pump con-
trol rod via the regulation sleeve, a lever and a regula-
tor arm. The engine speed is regulated throughout the
entire range, from low idle to high idle (all-speed type).
Design and function
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