GENERAL INFORMATION.

TM 55-4920-201-14

Publications) and forwarded directly to Com-

operation applications covering the propellers and

mander, US Army Aviation Systems Command,

helicopters rotating components are included through

ATTN: AMSAV-MMD, 4300 Goodfellow Blvd., St.

section IV with the accompanying technical procedures.

Louis, MO 63120-1798.

c. The part number 7HEL053 kit, small parts balan-

cing, is shown in figure 1-18 and requires no assembly to

1-4. GENERAL INFORMATION.

prepare it for use. The kit includes an arbor assembly

and adapters for use on small bore equipment that can-

a. The part number 7A050 kit is shown in figure l-l

not be accommodated on the 7A050 balance arbor

with the work stand and hoist structure components

assembly.

erected in preparation for use. The balance indicating

device (arbor assembly) is also in place, suspended from

d. The primary component of both the part number

the hydraulic pump assembly. Normally, this work stand

7A050 balance kit and part number 7HEL053 balance kit

and hoist structure is utilized for most of the balance ap-

is a horizontal suspension-type balance arbor assembly.

plications covered in this manual.

Precisely balanced adapters and other components in-

cluded in these and the supplementary adapter kits and

b. Figures 1-2 through 1-12 inclusive illustrate

miscellaneous parts are designed to control the installa-

various, typical support and suspension applications of

tion of the various propeller and helicopter rotating com-

the 7A050 kit with, and without, supplementary adapter

ponents on the respective arbor assembly so that all

kit comporents. These illustrations are presented for

mass is concentric.

general familiarization purposes only. Specific balance

1 - 2 Change 6