SECTION V: TROUBLESHOOTING
TM 9-2350-256-20
tube between main fuel check valve and manifold
fuel filter. Turn MASTER and fuel pump switches to
ON position. Press starter button and operate purge
pump. If handle was excessively hard to operate or
could not be operated previously and can now be
operated,
replace main fuel check value (see
paragraph 4-13). Disconnect left intake manifold
tube at tee on manifold heater fuel inlet solenoid
valve. With MASTER and fuel pump switches in ON
position, press preheat and starter buttons while
operating purge pump. If no fuel flows from tee,
install new manifold preheater fuel filter (see
paragraph 4-18).
N
Operate pump with MASTER and fuel pump in ON
position. Press preheat and starter buttons. Ii fuel
fails to flow, troubleshoot manifold preheater circuit
(see paragraph 2-19).
O
Remove engine deck (see paragraph 9-51) and both
plastic tubes at manifold heater nozzles. With an
assistant to watch both tube ends, turn MASTER and
fuel pump switches to ON position. Press starter and
preheater buttons while operating purge pump. If
no fuel flows from one or both tubes, replace
defective tubes (see paragraph 4-23). If fuel flows
from both tubes, disconnect manifold heater return
tube (see paragraph 4-23). Inspect manifold heater
for damaged threads or plugged orifice. Replace
manifold heater if threads are damaged (see
paragraph 4-21).
Dry-cleaning solvent used to clean parts is
potentially dangerous to personnel and
property. Do not use near open flame or
excessive heat. Flash point of solvent is
138°F (59°C).
If orifice is plugged, soak nozzle in dry-cleaning
solvent (Appendix D, item 9). Using a fine wire,
clean
o r i f i c e o p e n i n g . I n s p e c t f i l t e r s f o r
contamination or damage. Clean or replace filters
(see paragraph 4-18). Assemble in reverse order of
disassembly. Install manifold heater nozzle
assembly and tighten jamnut. Connect manifold
heater fuel inlet hose and fuel return tube.
P
Perform battery serviceability test (see paragraph 2-
19). Recharge or replace low batteries (see paragraph
63).
Change 1
2-40.3