CHAPTER 1
INTRODUCTION
Section I. GENERAL
1-2. Forms and Records
1-1. Scope
a. DA Forms and records used for equipment
a. These instructions are published for the use of
maintenance will be only those prescribed in TM 38-750.
personnel to whom the Crane-Shovel is issued. They
b. Report
of
errors,
omissions,
and
provide information on the operation and organizational
maintenance of the equipment. Also included are
recommendations for improving this publication by the
descriptions of main units and their functions in
individual user is encouraged. Reports should be
relationship to other components.
submitted on DA Form 2028 (Recommended Changes
b. Numbers in parentheses following nomenclature
to DA Publications) and forwarded direct to the
Commanding General, U.S. Army Mobility Equipment
callouts on illustrations indicate quantity. Numbers
Command, ATTN:
AMSMEMPP, 4300 Goodfellow
preceding nomenclature callouts indicate preferred
Boulevard, St. Louis Mo.
maintenance sequence of removal or disassembly, and
63120.
reassembly or installation should be performed in
reverse order.
c. Report
all
Equipment
Improvement
Recommendations as prescribed in TM 38-750.
Section II. DESCRIPTION AND DATA
hinged doors and sliding panels provide access for
1-3. Description
removal of engine or machinery. Framed glass windows
a. General. The Harnischfeger Models 855BG-2
in operator's compartment can be opened for ventilation
and 855BG3 Crane-Shovels are crawler mounted, two
or additional visibility. Hand levers and foot pedals in
cubic yard, 40 ton capacity, diesel engine driven units.
operator's compartment control all motions of revolving
The booms are interchangeable, enabling conversion to
frame operating machinery (para 2-8), and are easily
shovel, crane, clamshell, dragline, backhoe, or piledriver
within reach of the operator from his adjustable seat.
oeration.
consists of two crawler tracks and the carbody. Each
upon which are mounted the engine, upper machinery,
crawler track consists of forged steel side bars, (pinned
and gantry, revolves around a center gudgeon and a
together), with track shoes bolted on. Tracks are chain
live roller circle mounted on the crawler. It carries four
driven by the tread sprocket, and supported by a large
hook rollers (two in front and two at rear), which ride on
idler roller and numerous track rollers. The carbody
the underside of the roller path, and prevents tipping of
houses the propelling and steering mechanism.
the rotating base. A counterweight is fastened at rear of
e. Engine. The crane-shovel units are powered by
revolving frame. A gantry frame which contains gantry
six-cylinder diesel engines, which operates both deck
sheaves and harness is mounted on the revolving
machinery and crawlers, and are equipped with
frame, along with a collapsible high gantry which is
electrical starting motors. The engine may be either a
rovided for use in crane, clamshell, dragline, or
Harnischfeger Model 687C-18-ES or a Caterpillar Model
piledriver service.
D333TA,
machinery on the revolving frame. It consists of rigid
steel
frame
work
and
panels.
Several
1-1
