TM 5-2420-230-24-2
Fuel Lift Pump (005-045)
B3.9 and B5.9 Series Engines
Page 5-84
Section 5 - Fuel System - Group 05
If the fuel transfer pump delivers the required volume of fuel
from a temporary supply, check for restrictions or suction
leaks in the fuel circuit to the fuel transfer pump:
1. Supply line
2. Prefilter
3. Supply line
4. Supply tank
5. Tank vent.
Check for a plugged supply tank vent first.
Replace or clean the prefilter.
In cold weather check for gelled fuel blocking the prefilter.
Check for kinks that can restrict the fuel supply lines.
Remove and blow out the fuel supply lines.
L-944