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 - Page 175 of 452

BASIC DRIVING GUIDELINES - CONTINUED

3. Frequently check engine water temperature gauge (Figure 7, Item 1). Normal

water temperature should range from 165–195° F (74–91° C) for M915 through

M920 or 180–200° F (82–93° C) for M915A1. Water temperature should be

above 160° F (71° C) at low end, and up to 212° F (100° C) at high end. If

temperature reaches 220° F (104° C), shut down engine and check cooling

system.

4. Check front air pressure gauge (Figure 8, Item 1) and rear air pressure gauge

(Figure 8, Item 2). The normal operating range is 105–140 psi (724–965 kPa). Air

pressure should be at least 80 psi (552 kPa) for M915 through M920 or

90 psi (621 kPa) for M915A1. The low pressure warning lamp (Figure 8, Item 3)

and buzzer will come on at approximately 64–76 psi (441–524 kPa).

Figure 7. Water Temperature Gauge.

1

M915 THROUGH M920

M915A1

Figure 8. Air Pressure Gauges and Low Air Pressure Indicator.

1

1

2

2

3

M915 THROUGH M920

M915A1

TM 9-2320-273-10

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