Section I. INTRODUCTION AND DESCRIPTION

TM 55-4920-424-13&P

SECTION I

INTRODUCTION AND DESCRIPTION

1-1. INTRODUCTION.

1-2. This technical manual provides all instructions necessary for the operation and maintenance of the Dual Purpose

Mobile Check and Adjustment/Generator Stand, identified by Part Number 45977-100. The Mobile Check and

Adjustment/Generator Stand (figure 1-1), hereafter referred to as the Mobile Check Stand, is manufactured by the Solar

Division of International Harvester Company, 2200 Pacific Highway, San Diego, California.

1-3. PURPOSE.

1-4. The Mobile Check Stand provides the components and controls necessary to functionally test the Models T-62T-2A

and T-62T-2A1 Auxiliary Power Units (APU) prior to installation in the aircraft, or upon removal from the aircraft, or to

check and adjust the units after minor repair or overhaul. The Mobile Check Stand with either APU installed, can provide

the aircraft with ac power for checkout after aircraft repair, or for aircraft preflight checks.

1-5. ARRANGEMENT OF MANUAL.

1-6. The manual is divided into nine sections. Section I identifies the equipment and describes the components and their

functions. Section II gives the procedures necessary to prepare the equipment for use. Section III describes the

adjustments required and the connections necessary for operating the equipment. Section IV lists the inspections and

preventive maintenance procedures required to ensure efficient operation. Section V lists all replaceable parts,

assemblies, sub-assemblies, and detail parts of the mobile check stand. Section VI describes the troubleshooting

procedures and remedies. Section VII gives the instructions for removal, repair, and replacement of components.

1-7. DESCRIPTION.

1-8. The mobile check stand is an open-frame carrier, pivot-plated on two pairs of wheels mounted with pneumatic tires.

Mounting provisions for the models T-62T-2A, and T-62T-2A1 auxiliary power units are incorporated together with the

necessary electrical and fuel connections between the unit and the check stand components. The mobile check stand is

equipped with a steering towbar and a mechanical hand brake system. It is weatherproofed to provide protection of

critical components from the elements. The major assemblies mounted on the check stand are: the battery, control

1-1