TM-9-2320-344-10

TRUCK, CARGO, GUIDED MISSILE TRANSPORTER (GMT), 8X8, M985A4GMT

TECHNICAL MANUAL; OPERATOR'S MANUAL

OCTOBER 2008

TM-9-2320-344-10 - Page 363 of 1012

OPERATOR MAINTENANCE

DRIVE VEHICLE UP/DOWN STEEP GRADE

INITIAL SETUP:

Not Applicable

DRIVE VEHICLE UP STEEP GRADE

Press and hold throttle pedal (1) all the way down as vehicle moves up grade. Transmission

will automatically downshift gears as needed.

TRAILER

AIR SUP LY

PARKING

BRAKE

AIR BRAKE

8X8

M

M

1

Figure 1.

DRIVE VEHICLE DOWN STEEP GRADE

CAUTION

•

Do not allow speed to go above 2100 RPM when driving downhill, or

damage to engine can result.

•

Engine brake operates best when engine speed is between 1650 and

2100 RPM. Transmission torque converter lockup valve may

disengage below 1650 RPM resulting in loss of engine power.

1.

Set transmission range selector (1) to lower range as needed to keep engine speed on

tachometer (2) between 1650 and 2100 RPM.

TM 9-2320-344-10

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