Section I. INTRODUCTION - TM-55-4920-341-140009

TM 55-4920-341-14

Section I. INTRODUCTION

Scope

a. This technical manual contains operating and maintenance instructions

with parts breakdown for the gasoline engine driven Hydraulic System Test

Stand Type D-5B.

b. Appendix A contains the Maintenance Allocation Chart. The chart

assigns the maintenance functions and repair operations to be performed

by the lowest appropriate maintenance level.

c. Appendix B consists of supplementary engine operation and maintenance

instructions. These instructions have been included as an appendix since

they represent a separate self-contained engine manual.

d. Appendix C consists of supplementary hydraulic pump instructions.

These instructions have also been included as an appendix since they represent

a separate self-contained pump manual.

1-2. Reporting of equipment publications improvements. The reporting of

errors, omissions, and recommendations for improving this publication by

the individual user is encouraged. Reports should be submitted on DA Form

2028 (Recommended Changes to Publications) and forwarded direct to Command-

ing General, US Army Aviation Systems Command, ATTN: AMSAV-M, PO Box 209,

St. Louis, Missouri 63166.

1-3. Forms and Records

Maintenance forms, records and reports which are to be used by maintenance

personnel at all maintenance levels are listed in and prescribed by TM 38-750.

1-4. Purpose. The test stand (Fig-1) is designed to flush or fill the

aircraft hydraulic system with micronically filtered hydraulic oil. It

also tests the aircraft's hydraulic systems and provides hydraulic pressure

for testing the systems without aircraft engines in operation.

1-4.1. Trailer and Running Gear Assembly. The frame assembly (19 Fig-1)

is of a welded steel construction furnished with a hinged drawbar (12 Fig-1)

assembly suitable for vehicle towing. Springs (10 Fig-1 & 7 Fig-2) are

provided to insure good riding qualities without materially increasing

height. A knuckle-type steering apparatus (17 Fig-1) incorporating tie

rods (10 Fig-2) and king pins, is used to provide positive steering. Rear

wheels are equipped with mechanical parking brakes, set by the brake lever

assembly (14 Fig-1) to

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