Fuel Injection Pump, Rotary (005-014)
B3.9 and B5.9 Series Engines
Section 5 - Fuel System - Group 05
Fuel Injection Pump (Distributor Type)
The fuel injection pumps, Bosch VE, Lucas CAV DPA,
Stanadyne DB4, and Lucas CAV DPS, are rotary distributor
pumps. These pumps perform the four basic functions of:
1. Producing the high fuel pressure required for injection
2. Metering the exact amount of fuel for each injection
3. Distributing the high-pressure, metered fuel to each
cylinder at the precise time
4. Varying the timing relative to engine speed.
Distributor-Type Pump Governor
Balance between the governor flyweights and control lever
position controls the metering of the amount of fuel to be
The fuel injection pump governor performance and setting
can affect engine power. Special equipment and qualified
personnel are required to verify governor performance. If
the seals are broken on the external Bosch VE adjustment
screw, the fuel rate can, perhaps, be out of adjustment.
The Lucas CAV DPA/DPS fuel injection pump uses a coded
spring connection to change the governor setting. Incor-
rect connection of the governor spring can affect perfor-
Adjustments and rating changes are described in the Mas-
ter Repair Manual, Injector Pumps and Injectors, Bulletin
Manual Shutdown Levers
Both fuel injection pumps are equipped with mechanical
shutdown levers. These levers are spring-loaded in the run
position. Not all applications will use these manual shut-
down controls, and there will be no cable or rod connected
to the lever.
NOTE: Partial actuation of the mechanical shutdown levers
will affect fuel flow and engine power.