Weld Cable Connection; Wire Feed Drive Roll And Guide Tube Kits; Electrode Cable Connection; Work Cable Connection - Lincoln Electric LN-25 Service Manual

A-5
Install the barbed fitting and union nut to the
female inert gas fitting on the front panel of the LN-
25 case. Connect the 3 ⁄ " I.D. gas hose from the gun
1 6
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
t i g h t m e t a l - t o - m e t a l e l e c t r i c a l c o n t a c t . Poor
work lead connections can result in poor welding
performance.
INSTALLATION
5 ⁄ -18
8
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
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
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.
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
.023-.035 Solid Steel
Aluminum Wire Sizes:
1 ⁄
1 6
3 ⁄
6 4
.035
(1) Drive rolls for .045-.052 cored electrode sizes are stencilled with
a "C" suffix to the wire sizes. Drive rolls for aluminum wire sizes
are stencilled with an "A" suffix to the wire sizes.
LN-25
WARNING
5 ⁄ " cored and 1 ⁄ " solid
64 16
(1) on each part. Check the kit
TABLE A.2
Kit Instructions
KP450- 3 ⁄ S17984
3 2
- 1 ⁄
1 6
-.052
-.052C
KP451-.035S S17831
1 ⁄
KP452- A S17083
1 6
- 3 ⁄ A
6 4
-.035A
A-5