CHAPTER 2 OPERATING INSTRUCTIONS
Description and Use of Operators Controls and Indicators (page 2-1)
Operator Preventive Maintenance Checks and Services (PMCS) (page 2-28)
Operation Under Usual Conditions (page 2-100)
Operation Under Unusual Conditions (page 2-201)
Operation of Special Purpose Kits (page 2-217)
Section I. DESCRIPTION AND USE OF OPERATORS CONTROLS AND INDICATORS
KNOW YOUR CONTROLS AND INDICATORS
Before you attempt to operate your equipment, ensure you are familiar with the location and function of all controls
and indicators. The location and function of controls and indicators for the M939, M939A1, and M939A2 series vehicles
are described in this section as follows:
Chassis Controls and Indicators: paragraph 2-3.
Body Equipment Controls and Indicators: paragraph 2-4.
Special Kits Controls and Indicators: paragraph 2-5.
Except where specifically noted, the controls and indicators in this section are generally applicable to all
vehicles covered in this manual.
In this manual, the term left indicates the driver's side of the vehicle. The term right indicates the opposite, or
crew's side of the vehicle.
PREPARATION FOR USE
When a vehicle is received by the using organization, it is the responsibility of the officer-in-charge to determine
whether it has been properly prepared for service by the supplier. It is the responsibility of the officer-in-charge to ensure
the vehicle is in condition to perform its functions. Unit maintenance will provide any additional service required to bring
the vehicle to operating standards. Before operating the vehicle, the operator must become familiar with the vehicle
controls and indicators as described in this chapter.