TB 11-6115-741-24
Observe frequency gauge for signs of frequency instability.
g) Turn AM/VM switch to measure output on different legs.
h) Twist voltage adjust switch to lowest voltage and then to highest voltage. Observe output voltage and
resistance of switch, looking for voltage jumps and uneven resistance (indicating dust contamination)
i) Move frequency select switch and observe Hz meter for frequency change. Monitor frequency for
stability.
j) Verify operation of engine battery charging alternator by measuring DC voltage.
k) Test operation of GFCI on convenience receptacle (CR). On the 5 and 10 KW Mil Std sets, verify that
the CR `HOT' is wired to the circuit breaker then verify that the other side of the circuit breaker is wired
to terminal L3 on S6. Verify that the CR Neutral is wired to terminal 6 on S6. And verify that there is an
AWG #4 jumper wire on S6 between terminals 6 and L0. After wiring is verified, test CR voltage/polarity
at all three generator output voltage connections.
l) Slowly increase load on generator set until over current protection circuit trips. Turn off load and
restart generator set.
m) Test low oil pressure protection circuit IAW applicable TM and verify generator set shuts down.
n) Test high temperature protection circuit IAW applicable TM and verify generator set shuts down.
o) Test operation of battle short switch IAW applicable TM.
p) Check auxiliary fuel pumps for proper operation, except on the 5 and 10 KW TQG's (as they are 100%
replaced).
q) Perform Quality Power Test IAW paragraph 7.1, Generator Testing. As applicable, verify proper
operation of the Power Unit Switch Box IAW paragraph 7.2.
r) Shut down generator set.
s) Remove the valve covers and inspect the internal oil galleries for caked dust and oil sludge. If
caked dust or oil sludge is thicker than 0.125 inch (1/8 inch), the generator set shall be identified
as a candidate for TIER 2 repair or engine replacement.
End of Functional Inspection operational procedure
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