TM-9-2320-430-10

TRUCK, TRACTOR, 8X8, M983

TECHNICAL MANUAL; OPERATOR'S MANUAL

JUNE 2009

TM-9-2320-430-10 - Page 167 of 868

OPERATOR MAINTENANCE

FIFTH WHEEL CONTROLS

CONTROLS AND INDICATORS INTRODUCTION

This section displays the location and describes the use of Fifth Wheel Controls which are

used in the operation of HEMTT series vehicles. Controls and indicators described in this

section are the same for all vehicles, except where otherwise indicated.

LOCATION AND USE OF CONTROLS AND INDICATORS

Know the location and proper use of every control and indicator before operating HEMTT

series vehicles. Separate illustrations with keys are provided for learning about Fifth Wheel

Controls.

Table 1.

Fifth Wheel Controls.

Key

Control/

Indicator

Function

1

2

Figure 1.

1

Primary Lock

Release

Pull out (push up and hook tab to lock) to open fifth wheel

coupler jaws. Push in to close fifth wheel coupler jaws.

Primary lock release will not function when secondary lock

release is locked.

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