Lincoln Electric K2704-2 Cougar Push Pull Gun Troubleshooting Guide, Problem Symptoms Remedy

COUGAR™ Push Pull Gun

Troubleshooting Guide

PROBLEM		SYMPTOMS		REMEDY
No arc, wire feed, or gas flow.	1. Cable connections loose.		1.	Check all power connections.
	2.	Trigger switch loose or defective.	2.	Fix switch or replace.
	3.	Welder not turned on.	3. Turn on welder power.
	4.	Welder not plugged in.	4.	Plug in.
	5.	Cable or adapter cable damaged.	5.	Inspect and replace
No arc, weak arc.	1. Poor ground connection to work.		1.	Check ground connection.
	2.	Power cable connection loose.	2.	Check connections; if defective,
	3.	Voltage set too low.	3.	replace cable or connectors.
				Adjust to proper voltage
	4.	Tip too large for wire size.	4.	Change tip size.
	5.	Wire feed speed too slow.	5.	Increase wire feed speed.
No wire feed.	1. Feeding small diameter wire with large		1.	Change position of wire drive roller.
	2.	groove on drive roller.	2.	Close wire drive release.
		Wire drive release open.
	3.	Wire welded to tip.	3.	Peel wire off tip or use new tip.
	4.	Wire push-pull empty in machine.	4.	Insert new push-pull.
	5.	Tip too small for wire.	5.	Insert correct tip.
	6.	Kink or bend in wire.	6.	Pull wire through tip or start new
	7.	Control cable loose.	7.	wire end.
				Check all connections.
	8.	Drive roller worn.	8.	Replace.
	9.	Pressure roller stuck.	9.	Replace or lubricate.
	10. Roller spring loose or broken.		10. Replace.
Wire feed too fast or too slow.	1. Wrong wire speed set for work.		1.	Adjust wire feed speed.
Low or no gas flow. Oxidation of work.	1. Gas flow not set right.		1.	Set proper flow rate.
	2.	Cylinder out of gas.	2.	Get new cylinder of gas.
	3.	Cylinder valve closed.	3.	Open cylinder valve.
	4.	Leak in gas line.	4.	Inspect and replace.
	5.	Leak in gun.	5.	Check for missing gun tubes and/or
	6.Gas diffuser clogged		6.	missing gun body cover.
				Blow out gas diffuser openings.
Oxidized work, arc unstable.	1. Wrong welding polarity.		1.	Check polarity.

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