Chapter 1. INTRODUCTION - TM-55-4920-405-13-P0015

TM 55-4920-405-13&P

CHAPTER 1

INTRODUCTION

Section I. GENERAL INFORMATION

d. The locations of control panel nameplates

1-1. GENERAL. This technical manual provides

operating aviation unit and aviation intermediate

differ slightly.

maintenance instructions for Gasoline Engine Driven

e. The part number of the control panel is differ-

Hydraulic Test Stand, Type D-5C. The test stand is

ent because mounting holes for the nameplates

manufactured by the United Manufacturing

have been relocated.

Division, UMC Electronics Co., North

Haven, Connecticut. The manufacturer's designa-

1-3. SCOPE. You can use the test stand to check

the performance of aircraft hydraulic system com-

tion is Test Stand, Hydraulic System, Gasoline

Engine Driven, Type D-5C, part number 7469 or

ponents. The test stand is mobile, and contains its

own reservoir, Volume and pressure of hydraulic

7469-1.

fluid can be regulated without using aircraft power.

1-2. MODEL DIFFERENCES. Unless otherwise

1-4. MAINTENANCE FORMS AND RECORDS.

specified, all instructions in this technical manual

Maintenance forms, records, and reports which are to

apply to both test stand, part number 7469, and test

be used by maintenance personnel at all maintenance

stand, part number 7469-1. Test stand, part num-

levels are listed in and prescribed by DA PAM

ber 7469-1 differs from test stand, part number

738-751.

7469, in the following ways:

a. A hose connector adapter assembly is supplied

1-5. REPORTING ERRORS AND RECOMMEN-

with part number 7469-1 only. This adapter

DING IMPROVEMENTS. Refer to Table of Con-

assembly permits you to connect the 1/2" hose

tents.

assembly to the 3/4" hose assembly to form a

closed loop system for self-checking the test

stand.

b. The identification plate is different because of

the difference in part numbers.

c. The capacity nameplates differ in wording.

Section II. DESCRIPTION AND LEADING PARTICULARS

the internal assemblies from the weather. You can

1-6. DESCRIPTION. The test stand (figure l-l) is

get to internal assemblies and operating controls,

a self-contained, mobile, hydraulic test stand. It

and provide needed ventilation during operation by

consists of a steel, weather-resistant cabinet that is

opening doors on the cabinet assembly.

mounted on a trailer assembly. The trailer has

individually suspended wheels, hand operated park-

1-7. FUNCTION OF PARTS AND ASSEMBLIES.

ing brakes, and a hinged tow bar. You can tow the

See figures 1-3 through 1-7 for the locations of

test stand from one operating location to another

major parts and assemblies of the test stand. Refer

with a truck or other suitable vehicle. TWO main

to tables 1-1 through 1-5 for the functions of these

assemblies and assorted hydraulic hose assemblies

parts and assemblies.

make up the test stand. Unit subassembly (2, fig-

ure 1-2) contains all parts and assemblies needed to

1-8. LEADING PARTICULARS. Refer to table 1-6

provide hydraulic fluid at regulated pressure and

for a listing of the main capabilities and limitations

flow, and monitoring devices. Cabinet assembly (1,

of the test stand.

figure 1-2) covers the unit subassembly. It protects

1-1

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