TM 5-2420-230-24-2
Fuel Pump Timing (005-037)
B3.9 and B5.9 Series Engines
Page 5-66
Section 5 - Fuel System - Group 05
CAV DPA/DPS Fuel Injection Pump Timing
Correct timing of the Lucas CAV DPA/DPS fuel injection
pump can be verified by removing the inspection plate.
NOTE: Special equipment in an authorized shop is re-
quired to time the Lucas CAV DPA fuel injection pump
precisely. However, for troubleshooting and in an emer-
gency, visual alignment of the timing mark is close enough
for the engine to run.
Both of these checks are described in the fuel injection
pump replacement. Refer to Procedure 005-012 or 005-
014. Refer to Procedure 005-013 for installation of the tim-
ing pin.
Timing Check - (Bosch VE Pump)
Rotate the crankshaft to top dead center (TDC).
12 mm
Remove the plug from the end of the pump.
CAUTION
Do not bend the fuel lines. Doing so can result in fuel
system failure.
Bosch Timing Tool (VE pump), Part No. 3377259
Install the timing indicator. Be sure to allow adequate travel
for the indicator.
In order to install the timing indicator, it is often necessary
to disconnect one or more of the fuel lines from the fuel
pump.
NOTE: The indicator is marked in increments of 0.01 mm.
One revolution of the indicator needle is equal to 0.50 mm.
L-926