TM-9-2320-273-10

TRUCK, TRACTOR, LINE HAUL; LIGHT EQUIPMENT TRANSPORTER; TRUCK CHASSIS; MEDIUM EQUIPMENT TRANSPORTER

TECHNICAL MANUAL; OPERATOR’S MANUAL

DECEMBER 2012
TM-9-2320-273-10

  TM-9-2320-273-10 - Page 164 of 452

COLD WEATHER STARTING BELOW 32º F (0º C) - CONTINUED
CAUTION
Failure to shut off engine if no oil pressure is indicated on
engine oil pressure gauge may result in severe engine
damage. Do not attempt to restart engine until problem has
been corrected.
13. At engine startup, check engine oil pressure gauge (Figure 8, Item 1) for 5 psi
(34 kPa) minimum on M915 vehicles or 10 psi (69 kPa) minimum on M915A1. If
no oil pressure registers on engine oil pressure gauge (Figure 8, Item 1) after 10
seconds, shut off engine immediately by turning engine run switch
(Figure 8, Item 5) to OFF position. Refer to Troubleshooting Procedures,
WP 0022 and WP 0023.
CAUTION
Do not rev or idle engine above 1,000 rpm during warm-up.
Damage to turbocharger or engine may occur if vehicle is
operated without allowing sufficient time for oil circulation
to reach turbocharger and for engine parts to warm up
gradually.
Allow engine to warm up to normal operating temperature
180–200° F (82–93° C) to ensure proper oil pressure. At low
idle, if engine oil pressure drops below 5 psi (34 kPa) on
M915 through M920 vehicles or 10 psi (69 kPa) on M915A1
vehicles, shut off engine and troubleshoot problem. Failure to
comply may result in severe engine damage.
NOTE
On M915 through M920 vehicles, at low idle the engine oil
pressure gauge should register 5–20 psi (34–138 kPa) at
normal operating temperature.
If necessary during engine warm-up, set the hand throttle to
maintain a smooth low idle speed.
14. Warm up engine by idling at 580–650 rpm until engine temperature reaches
180–200° F (82–93° C) and 5 psi (34 kPa) minimum oil pressure on M915
vehicles or 10 psi (69 kPa) minimum oil pressure on M915A1 vehicles is
maintained on engine oil pressure gauge (Figure 8, Item 1). Ensure ENG OIL
(low oil pressure) warning indicator (Figure 8, Item 2) goes off.
15. During warm-up period, observe instrument panel gauges and warning indicators
for proper operation.
16. Ensure LOW AIR PRESSURE warning indicator (Figure 8, Item 4) and buzzer
go off before releasing parking brake. PARK BRAKE warning indicator
(Figure 8, Item 3) will remain illuminated until parking brake is released prior to
driving vehicle.
TM 9-2320-273-10
0009
0009-8


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