REMOVE STANADYNE MODEL DB2 AND
DB4 INJECTION PUMP
All Stanadyne DB2 and DB4 injection pumps will have a
retained drive shaft (shaft stays in the pump when pump
is removed from engine).
IMPORTANT: Never steam clean or pour cold water
on a fuel injection pump while the pump
is running or while it is warm. Doing so
may cause seizure of internal rotating
1. Clean the fuel injection pump, lines and area around
A--Fuel Return Line
the pump with cleaning solvent or a steam cleaner.
B--Fuel Delivery (Pressure) Lines
C--Fuel Supply Line
2. Disconnect shut-off cable and speed control linkage, if
D--Mounting Stud Nuts
equipped. Disconnect electrical connection to shut-off
solenoid or throttle positioning solenoid, if equipped.
Disconnect cold start switch, if equipped. Tag electrical
wires for correct reassembly.
IMPORTANT: ALWAYS use a backup wrench when
loosening or tightening fuel lines at
injection pump so that discharge
fittings are not altered to prevent
possible internal pump damage.
3. Disconnect fuel return line (A) and fuel supply line (C).
4. Disconnect all fuel delivery (pressure) lines (B) from
injection pump using a suitable 17 mm deep-well
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