TROUBLESHOOTING PROCEDURES - CONTINUED
Table 1. Engine Troubleshooting Procedures - Continued.
TEST OR INSPECTION
Engine Cranks But Will Not Start or is 5. Check fuel lift pump pressure. 1. If fuel lift pump outlet pressure is
Remove fuel line from output
below 4.5 psi (30 kPa), replace
Hard to Start - Continued.
output port of fuel lift pump. Turn 2. If time for maximum pressure
(noted during cranking) to drop by
battery disconnect switch to ON
one half is less than 30 seconds,
position and lock steering frame
(TM 5-3895-379-10). Have
assistant crank engine for 10
seconds. Observe pressure gauge. 3. If fuel lift pump pressure checks
Note highest indication on
are OK, install fuel line on fuel lift
pressure gauge. Normal pressure
is 6-10 psi (40-70 kPa). Minimum
pressure is 4.5 psi (30 kPa). Turn
engine start switch to OFF
position (TM 5-3895-379-10).
Observe amount of time for
maximum pressure noted during
cranking to drop by one half.
Time should be greater than 30
seconds. Remove pressure gauge
from fuel lift pump.