Lincoln Electric MAGNUM PRO 350 Operator'S Manual Download Page 3

SECTION A:

WARNINGS

  

CALIFORNIA PROPOSITION 65 WARNINGS

WARNING: 

Breathing diesel engine exhaust

exposes you to chemicals known to the State
of California to cause cancer and birth defects,

or other reproductive harm.

• Always start and operate the engine in a 

well-ventilated area.

• If in an exposed area, vent the exhaust to the outside.
• Do not modify or tamper with the exhaust system. 
• Do not idle the engine except as necessary.

For more information go to 

www.P65 warnings.ca.gov/diesel

WARNING: This product, when used for welding or
cutting, produces fumes or gases which contain
chemicals known to the State of California to cause
birth defects and, in some cases, cancer. (California
Health & Safety Code § 25249.5 

et seq.)

WARNING: Cancer and Reproductive Harm
www.P65warnings.ca.gov

ARC WELDING CAN BE HAZARDOUS. PROTECT
YOURSELF AND OTHERS FROM POSSIBLE SERIOUS
INJURY OR DEATH. KEEP CHILDREN AWAY. 
PACEMAKER WEARERS SHOULD CONSULT WITH
THEIR DOCTOR BEFORE OPERATING.

Read and understand the following safety highlights. For
additional safety information, it is strongly recommended 
that you purchase a copy of “Safety in Welding & Cutting - 
ANSI Standard Z49.1” from the American Welding Society, 
P.O. Box 351040, Miami, Florida 33135 or CSA Standard 
W117.2-1974. A Free copy of “Arc Welding Safety” booklet 
E205 is available from the Lincoln Electric Company, 
22801 St. Clair Avenue, Cleveland, Ohio 44117-1199.

BE SURE THAT ALL INSTALLATION, OPERATION,
MAINTENANCE AND REPAIR PROCEDURES ARE
PERFORMED ONLY BY QUALIFIED INDIVIDUALS.

FOR ENGINE POWERED

EQUIPMENT.

   1.a. Turn the engine off before troubleshooting

and maintenance work unless the
maintenance work requires it to be running.

   1.b. Operate engines in open, well-ventilated areas or vent the engine

exhaust fumes outdoors.

   1.c. Do not add the fuel near an open flame welding

arc or when the engine is running. Stop the
engine and allow it to cool before refueling to
prevent spilled fuel from vaporizing on contact

with hot engine parts and igniting. Do not spill fuel when filling
tank. If fuel is spilled, wipe it up and do not start engine until
fumes have been eliminated.

   1.d.  Keep all equipment safety guards, covers 

and devices in position and in good repair.
Keep hands, hair, clothing and tools away 
from V-belts, gears, fans and all other 
moving parts when starting, operating or
repairing equipment.

   1.e. In some cases it may be necessary to remove safety guards to

perform required maintenance. Remove guards only when
necessary and replace them when the maintenance requiring
their removal is complete. Always use the greatest care when
working near moving parts.

   1.f.  Do not put your hands near the engine fan. Do not attempt to

override the governor or idler by pushing on the throttle control
rods while the engine is running.

   1.g. To prevent accidentally starting gasoline engines while turning

the engine or welding generator during maintenance work,
disconnect the spark plug wires, distributor cap or  magneto wire
as appropriate.

   1.h. To avoid scalding, do not remove the radiator

pressure cap when the engine is 

hot.

ELECTRIC AND

MAGNETIC FIELDS MAY

BE DANGEROUS

   2.a. Electric current flowing through any conductor

causes localized Electric and Magnetic Fields (EMF). 
Welding current creates EMF fields around welding cables 
and welding machines

   2.b. EMF fields may interfere with some pacemakers, and 

welders having a pacemaker should consult their physician
before welding.

   2.c. Exposure to EMF fields in welding may have other health effects

which are now not known.

   2.d. All welders should use the following procedures in order to

minimize exposure to EMF fields from the welding circuit:

2.d.1. Route the electrode and work cables together - Secure

them with tape when possible.

2.d.2. Never coil the electrode lead around your body.

2.d.3. Do not place your body between the electrode and work

cables. If the electrode cable is on your right side, the
work cable should also be on your right side.

2.d.4. Connect the work cable to the workpiece as close as pos-

sible to the area being welded.

2.d.5. Do not work next to welding power source.

SAFETY

Safety 02 of 04 - 5/16/2018

Summary of Contents for MAGNUM PRO 350

Page 1: ...www lincolnelectric com locator IM10113 A Issue Date Dec 15 Lincoln Global Inc All Rights Reserved For use with machines having Code Numbers K3131 K3134 K3132 K3135 K3133 K3136 Save for future refere...

Page 2: ...A LARGE ROOM OR OUTDOORS natural ventilation may be adequate if you keep your head out of the fumes See below USE NATURAL DRAFTS or fans to keep the fumes away from your face If you develop unusual s...

Page 3: ...hot engine parts and igniting Do not spill fuel when filling tank If fuel is spilled wipe it up and do not start engine until fumes have been eliminated 1 d Keep all equipment safety guards covers and...

Page 4: ...m to ANSI Z87 I standards 4 b Use suitable clothing made from durable flame resistant material to protect your skin and that of your helpers from the arc rays 4 c Protect other nearby personnel with s...

Page 5: ...nt passing through lifting chains crane cables or other alternate circuits This can create fire hazards or overheat lifting chains or cables until they fail 6 h Also see item 1 c 6 I Read and follow N...

Page 6: ...lation B 3 Connection to Feeder B 3 Connection to Lincoln Feeders B 3 Connection to Tweco Adapted Feeders B 4 Connection to Miller Feeders B 4 Connection to Lincoln Wirematic Hobart Series 2000 or SP1...

Page 7: ...th a feeder end connector With the K466 1 Magnum Connector Kit they can be used with any Lincoln LN 7 or LN 25 semiautomatic wire feeder The K466 1 should also be used with the LN 8 or LN 9 when feedi...

Page 8: ...TH MIXED GAS Description Gun Contact Tips Gas Product Cable Wire Size Standard Diffuser Gas Cable Gun Tube Number Length m in mm Duty Assembly Nozzle Insulator Liner 60 K3132 1 10 ft 035 0 9 3 1 5 64...

Page 9: ...H MIXED GAS Description Gun Contact Tips Gas Product Cable Wire Size Standard Diffuser Gas Cable Gun Tube Number Length m in mm Duty Assembly Nozzle Insulator Liner 60 K3135 1 10 ft 035 0 9 3 1 1 8 3...

Page 10: ...e kit The includ ed wrench will fit both the gas plug and barbed fit ting MAGNUM PRO 350 450 AND 550 DUAL PROCEDURE DUAL SCHEDULE WARNING c Attach the round connector of the gun control cable provided...

Page 11: ...ROCEDURE DUAL SCHEDULE K466 7 and K466 10 Installation Hobart Series 2000 Feeders and Lincoln 10 Series Feeders a Remove brass cable connector see Figure B 1 from the connector kit and screw it onto t...

Page 12: ...per nozzle should be selected based on the welding application Different length nozzles are available to fit 350 450 and 550 amp gun tubes to allow either spray or short circuiting transfer weld ing C...

Page 13: ...ocket on the gun cable con nector handle CONNECTION TO HOBART SERIES 2000 FEEDERS Gun cable assemblies which were assembled with a K466 7 Connection Kit will connect easily to a feeder a Check that th...

Page 14: ...ork d Lower welding helmet close gun trigger and begin welding Hold the gun so the contact tip to work dis tance gives the correct electrical stickout as required for the procedure being used e To sto...

Page 15: ...s of arc time or as required c To remove gun tube from gun loosen socket head clamping screw in handle with 3 16 4 8 mm Allen wrench Remove gas nozzle and nozzle insulator Pull gun tube out from gun h...

Page 16: ...e of the cable past the damaged section f For DS models Cut off damaged section of cable and strip off the outer jacket 3 50 88 9 back Be careful not to cut the insulation on the control wires while s...

Page 17: ...nst the shoulder pull the connector nut over the copper strands engage the gun tube connector threads and tighten in place See Figure E 3 CABLE BOOT CONNECTOR ASSEMBLY GUN HOUSING CONTROL WIRES TRIGGE...

Page 18: ...k Assemble cable in left side of gun handle Assemble trigger into the proper handle cavity For DP also assemble the rocker switch in the grooves provided in the handle Assemble right side of gun handl...

Page 19: ...e connector and into core of cable approximately 5 00 127 mm when pushing the connector tube into the cable core tube To tight en hold the connector in place while turning the nut then remove the rod...

Page 20: ...column labeled POSSIBLE CAUSE lists the obvious external possibilities that may contribute to the machine symptom Step 3 RECOMMENDED COURSE OF ACTION This column provides a course of action for the Po...

Page 21: ...Worn or improper size cable liner 8 Partially flashed melted or improper size contact tip 1 Contact tip worn or incorrect size 2 Worn or undersize work cables or poor ground connections 3 Loose elect...

Page 22: ...e to prolonged or excessive high current and or duty cycle welding 1 See Gas Metal Arc Welding Guide GS100 2 Clean gas cone Make certain that gas diffuser is not restricted Make certain that gas cylin...

Page 23: ...NOTES MAGNUM PRO 350 450 AND 550 DUAL PROCEDURE DUAL SCHEDULE...

Page 24: ...NOTES MAGNUM PRO 350 450 AND 550 DUAL PROCEDURE DUAL SCHEDULE...

Page 25: ...parts or electrode with skin or wet clothing l Insulate yourself from work and ground l No toque las partes o los electrodos bajo carga con la piel o ropa moja da l Aislese del trabajo y de la tierra...

Page 26: ...d Entl ftung des Arbeitsplatzes l Mantenha seu rosto da fuma a l Use ventila o e exhaust o para remover fumo da zona respirat ria l Turn power off before servicing l Desconectar el cable de ali mentac...

Page 27: ...tomer s particular purpose with respect to such information or advice As a matter of practical consideration we also cannot assume any responsibility for updating or correcting any such information or...

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