TM-9-2320-342-10-1

TRUCK, WRECKER, 8X8 M984A4

TECHNICAL MANUAL; OPERATOR'S MANUAL

OCTOBER 2008

TM-9-2320-342-10-1 - Page 371 of 1428

START WARM ENGINE - Continued

NOTE

•

Minimum engine oil pressure for safe operation (vehicle moving) is

30 psi (2 bar).

•

At idle, engine oil pressure can drop as low as 5 psi (0.34 bar), this

is a normal condition.

6.

Check that engine oil pressure gauge (5) indicates normal operating range of 40 to

70 psi (2.76 to 4.83 bar) at 1800 to 2100 rpm.

TRAILER

AIR SUPPLY

PARKING

BRAKE

AIR BRAKE

8X8

M

M

11

9

6

10

5

8

7

243v

12

13

Figure 5.

7.

Check that FRONT (6) and REAR (7) air pressure gauges read 60 to 120 psi (4 to 8

bar). Brake system failure (LOW AIR) indicator (8) will illuminate and buzzer may

sound until both gauges reach 60 to 75 psi (4 to 5 bar).

8.

Check that fuel gauge (9) shows enough fuel to complete mission.

NOTE

Engine coolant temperature gauge may not show reading at engine idle.

9.

Check that engine coolant temperature gauge (10) does not read over 219°F (104°C).

NOTE

Battery voltage readout is located in the top right corner of the LCD.

10.

Check that battery voltage readout (11) reads between 24 and 28 volts.

11.

If air filter restriction indicator (12) shows red, press and release RESET button (13).

TM 9-2320-342-10-1

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