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TM 9-2320-364-10
2-68
Table 2-1. Operator’s Preventive Maintenance Checks
and Services (Before) - CONT.
Location
Item
No.
Interval
Item to
Check/
Service
Procedure
Not Fully Mission
Capable if:
NOTE
Cold engines may have slightly higher oil pressure reading than a hot
engine.
11
Before
Controls
and
Indicators -
Cont.
(k) Check oil pressure gage (14).
Pressure gage must read between
40 to 80 psi (276 to 552 kPa) with
engine speeds between 1800 and
2100 rpm. Minimum pressure for
safe operation is 30 psi (207 kPa).
At idle, minimum oil pressure
should not be less than five psi
(34 kPa).
Engine oil pressure
is not within allow-
able pressures, and
engine oil warning
light lights or warn-
ing buzzer sounds.
(l) Check that the AIR PRESS
gage (15) is within the normal
operating range of 110 to 125 psi
(758 to 862 kPa).
Air pressure is not
within limits or
warning buzzer
sounds.
(m) Check battery gages (16 & 17)
for normal voltage output of 26 to
30 volts and 13 to 15 volts.
Voltage is not
between the proper
operating ranges.
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