TM 5-3431-225-15
INSTALLATION AND OPERATING INSTRUCTIONS
Section I. SERVICE UPON RECEIPT OF EQUIPMENT
e. Perform the daily preventive maintenance
2-1. Unloading the Equipment
services (para 3-5).
a. Shipment by Tractor. When the welding
machine is received by tractor, remove all secur-
ing devices and, with a forklift or other suitable
a. Ground and Electrode Cable Connections.
lifting device, remove it from the truck.
Refer to figure 2-1B and connect the work cables
Warning: When using a lifting device to
to the ground terminal stud and electrode ter-
move the welding machine, make sure it has a
minal stud located on the front of the welder. It
lifting capacity of no less than 1,000 pounds. Do
is recommended the welding leads be kept as
not allow the welding machine to swing or sway
short as possible to prevent high frequency dis-
while suspended. Failure to observe this warn-
sipation and erratic operation.
ing may result in damage to the equipment or
b. External Power and Ground Connections.
serious injury to personnel.
Connect the external power source as shown in
b. Shipment by Rail. When the welding ma-
ommended below. The welding machine must
chine is received by rail, remove all securing de-
be grounded prior to operation. The ground can
vices and with a forklift or other suitable lifting
be, in order of preference, an underground me-
device, remove it from the freight car.
tallic water piping system, a driven metal rod, or
2-2. Unpacking the Equipment
a buried metal plate. The ground rod must have
a. Unpacking. The welding machine has heavy
a minimum diameter of 5/8-inch if solid, or 3/4-
paper or cardboard around it to protect it from
inch if pipe, and must be driven to a minimum
damage. This is packed in a wooden box.
depth of 8 feet. A ground plate must have a min-
(1) Remove all metal banding with a suit-
imum area of 9 square feet and be buried to a
able tool.
minimum depth of 4 feet. The ground lead must
be a No. 6 AWG (American Wire Gage) copper
(2) Remove the wooden box with a claw
wire or larger, and be bolted or clamped to the
hammer, pry bar, nail puller, or other suitable
rod, plate, or piping system. Refer to figure 2-1A
tools.
and connect the external power and ground wire.
Note. Be careful not to damage the welding
RECOMMENDED LINE VOLTAGE WIRE AND FUSE
machine while removing the wooden box.
SIZES
b. Depreservation. Prepare the welding ma-
Line voltage wiring size-AWG Line voltage fuse size in AMPS
chine for inspection and operation as outlined
230V
460V
230V
460V
208V
208V
on DA Form 2258, attached on or near the con-
#1
#6
175
150
80V
#2
trol panel.
Warning: Before operating the unit, see
that the ground terminal lug is properly con-
a. Cheek packing list for missing parts.
nected by one of the methods referenced in para-
b. Inspect for damaged parts. Check welding
graph 2-4b. An ungrounded machine can cause
machine for dents, scratches, and damaged hous-
death by electrocution of personnel coming in
ing.
contact with it. If the welding machine is to be
c. inspect for damaged or broken controls and
connected to one phase of a three phase line,
DO NOT connect the third wire from a three
switches.
phase line to the stud labeled "GRD" as this
d. Inspect for loose and missing hardware,
may result in a "hot" welding machine.
lifting eyes, panels, and fittings,
