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Install the barbed fitting and union nut to the
female inert gas fitting on the front panel of the
LN-25 case. Connect the
gun cable to the barbed fitting.
When the gun is to be removed, this fitting can be
easily detached by loosening the union nut.
WELD CABLE CONNECTION
The size of the electrode cable and work cable must
be sufficient for the maximum weld current and total
cable length to be used. Refer to table A.1.
TABLE A.1
Weld Current
60% Duty Cycle
50'-100' 100'-150' 150'-200' 200'-250'
200Amps
2 AWG
300Amps
1 AWG
400Amps
2/0
500Amps
2/0
ELECTRODE CABLE CONNECTION
On units without an internal contactor route the
electrode cable through the oval hole in the LN-25
rear panel, then along the case floor behind the reel
support and around the door side of the wire drive.
Connect the electrode cable to the LN-25 using the
1
⁄
" bolt on the front of the wire drive.
2
On units with an internal contactor connect the
electrode cable to the LN-25 electrode input cable
with the nut and bolt provided. Tape the bolted
connection.
WORK CABLE CONNECTION
Connect a work lead of sufficient size between
the proper output stud on the power source and
the work. Be sure the connection to the work
makes tight metal-to-metal electrical contact.
Poor work lead connections can result in poor
welding performance.
INSTALLATION
5
⁄
-18
8
3
⁄
" I.D. gas hose from the
1 6
Total Cable Length
2 AWG
1 AWG
1/0
1 AWG
1/0
2/0
2/0
3/0
3/0
3/0
3/0
4/0
WIRE FEED DRIVE ROLL AND
GUIDE TUBE KITS
WARNING
Turn off power source before installing or changing
drive roll and/or guide tubes.
NOTE: The maximum wire sizes the LN-25 will
satisfactorily feed are
electrodes.
The electrode sizes that can be fed with each roll and
guide tube are stencilled
(1)
for proper components. See the instructions, included
with the drive roll kit, to install these parts on new
machines or replace them on used machines. Refer
to table A.2.
TABLE A.2
Steel Wire Sizes:
.068-
5
⁄
Cored
6 4
1
⁄
(.062) Cored or Solid
1 6
Steel
(Can also be used for .052)
.045 and .052 Solid Steel
.045 and .052 Cored
.035 Solid Steel
.035 Cored
.030 Solid Steel
.025 Solid Steel
Aluminum Wire Sizes:
1
⁄
1 6
3
⁄
6 4
.035
(1)
Drive rolls for only cored electrode sizes are stencilled with a
"C" suffix to the wire sizes.
Drive rolls for only solid electrode sizes are stencilled with an
"S" suffix to the wire sizes.
Drive rolls for aluminum wire sizes are stencilled with an "A" suffix
to the wire sizes.
4/96
A-4
5
⁄
" cored and
1
⁄
" solid
64
16
on each part. Check the kit
Kit
Instructions
KP653-
3
⁄
L9932
3 2
-
1
⁄
1 6
-.052
-.052C
-.035S
-.035C
-.030S
-.025S
1
⁄
KP654-
A
L9932
1 6
-
3
⁄
A
6 4
-.035A
LN-25
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Troubleshooting
