TM 5-3805-280-24-2
Fuel System Operation and Tests
STANADYNE ROTARY FUEL INJECTION PUMP OPERATION
115
60
DB2 Pump shown, DB4 Pump similar
1--Drive Shaft
6--Pressure Regulator
11--Governor
16--Rollers
2--Distributor Rotor
7--Discharge Fitting
12--Governor Weights
17--Supply Pump Inlet
3--Hydraulic Head
8--Metering Valve
13--Automatic Advance
18--Charging Ports
4--Delivery Valve
9--Pumping Plungers
14--Drive Shaft Bushing
19--Throttle Lever
5--Supply Pump
10--Internal Cam Ring
15--Housing
The plungers are actuated toward each other
The main rotating components are the drive shaft (1),
simultaneously by an internal cam ring (10) through
distributor rotor (2), supply pump (5) and governor
rollers (16) and shoes which are carried in slots at
(11).
drive end of the rotor. The number of cam lobes
normally equal the number of engine cylinders.
The drive shaft engages the distributor rotor in
hydraulic head (3). The drive end of rotor incorporates
two pumping plungers (9).
Continued on next page
RG,115,JW7694
1924NOV971/2
13-587