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