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 the personnel to whom the Harnischfeger
maintenance will be only those prescribed by TM
38-750.
Model DAR-300HFSG and Model 2100H2007
Welding Machine is issued. Chapters 1 through 4
b. The direct reporting of errors, omissions, and
provide information on the operation, preventive
recommendations for improving this equipment
maintenance services, and organizational mainte-
publication by the individual user is authorized
nance of the equipment, accessories, components,
and encouraged. DA Form 2028 (Recommended
and attachments. Chapter 5 provides information
Changes to Publications) will be used for re-
for direct and general support maintenance. Also
porting these improvements. This form may be
included are descriptions of main units and their
completed using pencil, pen, or typewriter. DA
functions in relation to other components.
Form 2028 will be completed by the individual
using the manual and forwarded direct to Com-
b. Numbers in parentheses on illustrations indi-
manding General, U.S. Army Mobility Equipment
cate quantity.
Command, ATTN: AMSME-MPP, 4300 Good-
fellow Boulevard, St. Louis, Mo, 63120.
Section Il. DESCRIPTION AND DATA
13. Description
chine is furnished with a combination foot switch
a. The Harnischfeger Model DAR300HFSG,
and output control, A pre-purge timer is furnished
rectifier type AC/DC arc welding machine (fig.
for inert gas welding.
1-1 and 13 ) is operated from an external power
source of 208, 230, or 460 volt alternating current,
and by 50 or 60 cycle single phase connections.
a. Identification. The welding machine has two
This welder provides an electrical controlled cur-
major identification plates. The information con-
rent output for use in either shielded inert gas
tained on these plates is listed below.
welding or metallic arc welding. The entire control
section is located in a panel at the front of the
(1) Corps of Engineers plate.
welding machine. The welding machine can be op-
Nomenclature ------------- Welding Machine:
erated by means of a remote off-on foot switch and
Arc 300 AMP
remote output control rheostat. A range switch
Make __________________ ___ Harnischfeger
Model No. ----------------- DAR-300HFSG
permits the selection of one of four desired cur-
Height ___________________ 41 in. (inches)
rent ranges. A soft switch permits feathering-in
Width -------------------- 28 in.
when the arc is started. The welding machine is
L e n g t h ------------------- 36 i n .
equipped with a timer for spot welding and a
Weight ------------------ ___ 790 lbs.
post-purge timer for inert gas welding. The con-
Contract No. -------------- DA-11-184-AMC-256 (T)
trol panel includes an ac ammeter and a dc am-
(2) Manufacturer's Identification and Data
meter for measuring current output and an ac
Plate, Model DAR-300HFSG.
voltmeter and a dc voltmeter for measuring arc
Input:
voltage.
Primary volts ___________ 208/230/460
