Perkins Phaser Series - General Description; Fuel Injection Pumps20 A

20A FUEL SYSTEM
General description
Caution: It is very important that dirt does not enter
the fuel system. Before a connection is
disconnected, clean thoroughly the area around the
connection. After the component has been
disconnected, fit a suitable cover to all open
connections.
Phaser/1000 Series engines are used for vehicle,
agricultural and industrial applications and may have
different fuel injection pumps. They use Bosch,
Lucas or Stanadyne pumps.
Turbocharged engines have pumps with a boost
control (B1). Some of the latest fuel pumps have a
locking screw to fasten the drive shaft of the pump
when the pump is removed from the engine.
Lucas DPA fuel injection pumps (C) are fitted to
naturally aspirated engines. Turbocharged engines
have Lucas DPA or DPS fuel pumps (D). The DPS
fuel pumps have a boost control (D2). Some of
these pumps are fitted with a self-vent feature (D1).
The boost control is a device which is affected by
boost pressure (from the turbocharger) and reduces
the maximum fuel delivery at lower engine speeds
to match the reduced air supply to the cylinders.
Both the Bosch and CAV fuel injection pumps have
mechanical governors to control the engine speed.
PA243
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1
PA244
PA245
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2
PA246
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1
20A.02 Perkins Phaser/1000 Series, April 1995