TM 5-6115-593-12
TO 35C2-3-463-1
Table 4-3. Organizational Troubleshooting -Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. ENGINE FAILS TO CRANK WHEN MASTER SWITCH IS MOVED TO START-continued
Step 5
Test starter and starter solenoid (L4) using operational test (see paragraph 4-71).
If starter solenoid emits an audible noise each time the MASTER SWITCH is cycled into START
position, and engine does not turn over, the starter assembly must be referred to next higher
maintenance for repair.
If no noise is heard, cranking relay K3 may be defective, and must be referred to next higher
maintenance.
Step 6.
Using a multimeter, check for 24V DC across speed switch, SS1 (see figure 4-40 and 4-42).
NOTE
To check this component refer to FO-3 to determine where these points are electrically accessible
to meter probes.
If 24V DC is present, SS1 may be defective and must be referred to next higher maintenance.
If 24V DC is absent, proceed to next step.
Step 7.
Using a multimeter, check for 24V DC across diode CR1 (part of AC-DC control relay assembly, 18, figure
4-19)
If voltage is present, CR1 may be defective, and must be referred to next higher maintenance. If
voltage is absent, proceed to next step.
Step 8.
Using a multimeter, check for 24V DC across timing relay crank disconnect relay K6 (part of AC-DC
control relay assembly, 18, figure 4-19).
If voltage is present, K6 may be defective and must be referred to next higher maintenance.
If voltage is absent, the malfunction is beyond the scope of organizational level maintenance and
must be referred to the next higher level of maintenance.
2. ENGINE CRANKS AT NORMAL SPEED BUT WILL NOT START.
Step 1.
Check LOW FUEL LEVEL indicator lamp on Generator Control Panel and fuel oil level in auxiliary tank.
4-21
