TM 5-6115-271-14
TO 35C2-3-386-1
TM-05926A-14
NAVFAC P-8-613-14
Table 5-1. Troubleshooting (Cont'd)
Table 5-1. Troubleshooting (Cont'd)
MALFUNCTION
MALFUNCTION
TEST OR INSPECTION
TEST OR INSPECTION
CORRECTIVE ACTION
CORRECTIVE ACTION
4. GENERATOR FREQUENCY FLUCTUATES
3. GENERATOR FAILS TO SUPPLY LOAD
(Cont'd)
OR DROPS UNDER LOAD (Models
MEP-016A/C and MEP-021A/C) (Cont'd)
Step 4. Test the circuit breaker as follows:
a. Attach a variable load to output ter-
b. The generator will shut down.
minals and start the generator set.
(1) Adjust the governor (fig. 5-1).
b. Move circuit breaker to ON position
(a) Start the generator.
and observe load meter and voltmeter.
(b) Place the governor control in
Reading at redline on load meter is 100%
the govern position.
load. Circuit breaker should stay on in-
(2) Refer to appropriate service
manual in Appendix A for other corrective
definitely under 100% load.
c. Adjust variable load until load meter
action.
reads in red portion of load meter. Circuit
Step 2. Check the engine for out of adjustment or
breaker should trip when indicator enters
defects. The frequency and load meters
red portion of load meter.
will fluctuate and then drop off.
Adjust (fig. 5-1) or replace the gover-
If circuit breaker trips below max-
nor (see appropriate service manual in Ap-
imum load (100% of 0.8 PF), (Power Fac-
tor), replace the circuit breaker (para 8-8).
pendix A).
5. GENERATOR NOISY
4. GENERATOR FREQUENCY FLUCTUATES
Inspect for a defective bearing.
OR DROPS UNDER LOAD (Models
a. On models manufactured prior to 1968, check
MEP-016A/C and MEP-021A/C)
the bearing by removing the control box access cover
Inspect the engine to see if it is lacking
Step 1.
power. Some indications are:
(1) Remove the three screws and lockwashers.
a. Generator will not achieve its rated
(2) Remove the control box access cover.
voltage.
(b) On models manufactured after 1968, tear down
the generator (para 10-2) and visually inspect the
bearing.
c. Examine the bearing for signs of wear or
discoloration.
Replace a defective bearing (para 10-2).
GENERAL MAINTENANCE
Section III.
The maintenance to be performed by intermediate (field), (direct support and general support) and depot
maintenance personnel on this equipment is limited to repair of the frame. Repair is accomplished by straighten-
ing bends using the furnished cutting and welding torch outfit or by replacement.
