Perkins 1106C Genset Systems Operation Testing And Adjusting page 20

20 KENR6931
Systems Operation Section
Fuel is drawn from the fuel tank (E) through a 20
micron Primary fuel filter (1) and the Water separator
(2) to the Transfer pump (3). The Transfer pump
increases the fuel pressure to 400 kPa (58 psi) to
500 kPa (72.52 psi). The fuel is pumped through the
optional fuel cooler (4) to the ECM (5). The fuel cools
the ECM. The fuel passes from the ECM to a 2 micron
fuel filter (6). The fuel filter removes particulates from
20 microns to 2 microns in size in order to prevent
contamination of the high pressure components in
the fuel system. Fuel passes from the Fuel filter to
the Fuel injection pump (7). The fuel is pumped at an
increased pressure to the Fuel manifold (rail).
Excess fuel from the Fuel manifold (rail) returns to
the tank through a non-return valve. There is a small
orifice in the fuel filter base in order to bleed any air
back to the tank.
The leak off fuel from the electronic unit injectors
returns from a connection in the cylinder head to the
pressure side of the transfer pump.