TM 5-6115-545-12
TO 35C2-3-444-1
NAVFAC P-8-626-12
TM 000838G-12
Section V. TROUBLESHOOTING
3-65. General
maintenance. The engine generator set must be completely
Table 3-3 provides information useful in diagnosing and
serviced with fuel, coolant, and lubricating oil. Before
troubleshooting, check that all electrical connections are correct
correcting unsatisfactory operation or failure of the engine
and operating controls are in the correct positions.
generator set and its components. Each malfunction stated is
followed by a list of the probable causes of the trouble. The
corrective action recommended is described opposite the
NOTE
probable cause. Any trouble beyond the scope of organizational
Air Force and Navy users are authorized to perform
maintenance shall be reported to the next higher level of
maintenance within the scope of their capability.
Table 3-3 Troubleshooting
MALFUNCTION
1.
Engine fails to crank
when START-STOP-
RUN switch is moved
to START position.
2. Engine cranks but will
not start.
PROBABLE CAUSE
a.
b.
c.
d.
e.
f.
g.
h.
a.
b.
c.
d.
e.
f.
g.
h.
i.
i.
k.
Improper starting
procedure.
Batteries weak,
Batteries improperly
installed.
Defective, corroded or loose
battery cables.
Defective or loose control
wires.
Defective DC CONTROL
CIRCUIT BREAKER.
Defective START-RUN-STOP
switch
Defective speed switch
Improper starting procedure.
Fuel supply exhausted
Water in fuel supply
Air in fuel system.
Restricted fuel supply line.
Defective day tank float
switch.
Defective fuel solenoid
valve.
Clogged fuel fitter and
strainer elements,
Clogged secondary filter
element.
Defective nozzle holder
assembly.
Clogged air intake system.
CORRECTIVE ACTION
a.
b.
c.
d.
e.
f.
g.
h.
a.
b.
c.
d.
e.
f.
g.
h.
i.
i.
k.
Perform starting procedure as described in
paragraph 2-12.
Recharge or replace batteries (para 3-82).
Refer to page 2-14, fig. 2-5c and page 2-21,
step 1, prior to replacing batteries.
Connect batteries as indicated in figure 3-4.
Tighten all loose connections and clean corrosion
from all terminals. (Refer to item 16, table 3-1.)
Inspect control wires and repair or tighten
as necessary.
Replace DC CONTROL CIRCUIT BREAKER
(para 3-100).
Replace START-RUN-STOP switch (para 3-119).
Replace defective speed switch (para 3-186).
Perform starting procedure as described in
paragraph 2-12.
Fill fuel tank or use auxiliary fuel supply
(para 2-3).
Drain fuel system, service with proper grade of
fuel (para l-4b).
Bleed fuel system (para 3-56c).
Clean restriction or replace tine.
Replace float switch (para 3-159).
Replace fuel solenoid valve (para 3-158).
Service filter and strainer (para 3-34).
Service filter (pars 3-197).
Replace nozzle holder assembly (para 3-201).
Service air filter assembly (fig. 3-5).
Change 18
3-21
