TM 9-6115-664-13&P
19 Hourmeter
Located
on
enclosure
wall.
Indicates hours of operation up to 9999.9
hours. To view hour meter, look into engine
crank access hole (26) and to the right.
20 Manual Start Switch Allows for manual start
of engine.
21 Engine Oil Level Dipstick Indicates amount
of oil in engine oil sump (crankcase).
22 Engine Oil Filler Allows for addition of
engine oil.
23 Engine Oil Drain Valve and Plug Allows for
draining of engine oil.
24 Oil Pressure Switch Normally open. Shuts
down engine when engine oil pressure
drops below 4 to 6 psi.
25 Oil Pressure Valve Relieves high pressure in
engine oil sump to prevent excessive build
up of oil pressure in lube system. Located
behind oil filter.
26 Engine Crank Access Hole Allows for
insertion of engine hand crank lever for
manual start of engine.
27 RUN Indicator Illuminates when engine run
signal is sent to engine (START / PRIME
RUN / OFF switch is in RUN position).
28 START Indicator Illuminates when engine is
cranking (START PRIME RUN / OFF switch
is in START position).
29 LOP (Low Oil Pressure) Indicator Illuminates
when engine oil pressure drops below 4 to 6
psi.
30 HT (High Temperature) Indicator Illuminates
when engine temperature exceeds 410 10
F (210 10 C).
31 APU ON Indicator Illuminates when APU
contactor is closed.
32 NATO Receptacle Connection point for
vehicle electrical power cable.
33 Fuel Fitting Connection point for vehicle fuel
supply line or auxiliary fuel supply.
34 Test Points (TP1-TP3) Used to test APU.
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