TM 5-3810-307-24-1-2
Table K-5. Impact Hammer Troubleshooting (Continued)
Symptom
Probable Cause
Corrective Action
Fuel System (Continued)
The impact hammer will not
4.
There is no pressure on the remote
4.
Increase the remote throttle pressure to
start. (Continued)
throttle.
300 psi (20.6 bar).
5.
The remote throttle does not build up
5a. Ensure the reservoir of the remote
pressure.
throttle is full of hydraulic fluid.
5b. Ensure the pressure relief valve on the
remote throttle is closed.
5c. Ensure the remote throttle hydraulic line
is properly connected to the remote
throttle and the throttle valve whip line on
the impact hammer (connection labeled
"THROTTLE CONNECTION").
5d. Ensure there are no leaks in the hydraulic
line and associated fittings between the
remote throttle and throttle valve (needle
block) on the impact hammer. Tighten
fittings or replace lines as necessary.
6.
The fuel pump feed inline filter is
6.
Replace the fuel pump feed inline filter.
clogged.
NOTE
Ensure fuel flows through the fuel
filter before connecting the fuel line.
7.
The fuel filter assembly is clogged.
7.
Replace the fuel filter assembly.
NOTE
Ensure fuel flows through the fuel
filter before connecting the fuel line.
8.
The fuel return inline filter is clogged.
8.
Replace the fuel return inline filter.
NOTE
Ensure fuel flows through the fuel
filter before connecting the fuel line.
9.
The fuel injector(s) is/are clogged
9a. Replace the fuel injector(s).
9b. Drain the fuel tank, flush the system, and
refill with fresh fuel. Also replace the two
fuel tank suction strainers, fuel pump feed
inline filter, fuel return inline filter, and fuel
filter element in fuel filter assembly.
10. The fuel has become contaminated
10. Drain the fuel tank and refill with fresh
with foreign material or water.
fuel. Also replace the two fuel tank
suction strainers, fuel pump feed inline
filter, fuel return inline filter, and fuel filter
element in fuel filter assembly.
11. Fuel leaks appear in one or more fuel
11. Check for fuel leaks throughout the fuel
lines.
system. Replace any defective lines or
fittings.
12. Set the remote throttle to zero pressure
12. Possible air-lock in fuel injector lines.
and remove the fuel injector line at the
fuel injector. Allow fuel to flow freely for
15 seconds.
When bubbles stop
appearing, reconnect the fuel injector line
and repeat the procedure for the other
fuel injector.
NOTE
Do not perform procedure on both
fuel injectors simultaneously.
Change-1 K-29
