(3) Check instrument readings. If any reading is not normal, stop engine. Report
condition(s) to organizational maintenance if operator troubleshooting cannot correct
malfunction. Normal instrument readings are:
(a) Oil pressure gage (4) should register 15 psi (103 kPa) minimum with engine
(b) Air pressure gage (3) should register 90 psi (621 kPa) minimum and 120 psi
(827 kPa) maximum,
(c) Battery indicator gage (2) should register in green area.
(d) Coolant temperature gage (1) should register between 175° F to 195° F (79°C
If vehicle has been exposed to extreme cold before starting,
organizational maintenance personnel must warm gearcases, wheel
hubs, and control linkage before operator places vehicle in motion.
d. Driving Vehicle.
(1) Remove chocks from vehicle
wheels. Place transmission gearshift lever
(5) in 1" (first) gear and transfer selector
lever (6) in LOW. Drive slowly for about
100 yards. This should be enough time to
warm up gearcases and tires to permit near
(2) Constantly check instruments
during engine operation. Oil pressure gage
(4) may indicate sudden drop because engine
oil consumption will be higher with oil,
engine, sub-zero (OEA), than with oil,
engine, heavy-duty (OE/HDO).
e. Stopping or Parking.
(1) Do not idle engine for more than 15 minutes.
(2) Park in a sheltered area out of the wind if possible. Park so vehicle does not face
into the wind if sheltered area is not available.