Weld Pak 100

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I have had a Lincoln Weld Pak 100 for about 6 years now.  It has worked flawlessly everytime that I have used it.  I use flux core occasionally and solid wire with gas occasionally.  Lately I have had a bit of trouble with the wire feeding.  It feels as if it is sticking in the cable liner, but I am not sure.   It is not sticking on the tip.  About every 6 inches or so of wire, it seems to stick, almost as if the wire speed stops for a split second then there it is.  If I just feed the wire without striking an arc, it is fine.  The drive roll seems to be driving it ok.  I am curious if the cable liner needs to be cleaned or replaced.  I am unsure of how to clean it, if it possible.  I havent ran but about 3 ten pound spools through it, as I just use it for small stuff.  Anyone have any suggestions on a fix?  I have nothing but good to say about my weldpak 100, but I would love to get it back up to par.Thanks in advance  Rob.....
Reply:It is real possible to clean the liner of most machines. Your manual will give you the 123 steps. Altho it normally takes a lot of wire to get one clogged, time can work against you. The wire you run through it can be corroded a little more than normal too when things just set. It's an easy task and probably needs done anyway. If that isn't it, a good cleaning doesn't hurt. Pull it out, take the tip and diffuser out, blow the liner and blow the tube with a compressor. You can be surprised at some of the crude that comes out of there.Besides that verify your drive pressure is enough to feed good and strong.
Reply:Stupid enough, but have you replaced the contact tip lately?
Reply:I have replaced the tip, that was the first thing I thought of.  I bet it does need to be blown out.  Where is a good online retailer to get the liners if I need one?  I will try cleaning the liner.....
Reply:http://www.welders-direct.com/merchant2/merchant.mvhttp://www.welding-direct.com/weldingdirect/http://www.weldingmart.com/lincoln.htm
Reply:I've thought the same thing with mine from time to time.  But it has always been a problem with the spool itself.  I find that I have over tightened it or something else and the spool of wire is not turning freely.  Just my $.02
Reply:I use a weld pak 155 and have experienced similar feed problems.   None of the local suppliers stocked the correct liner, so I took a stab at cleaning it.   Take the liner out and drop it into a can of acetone, put the lid on tight and shake it a bit.   Fish it out and let the liner air dry and reinstall it, you'll probably see an improvement.   I probably don't need to mention that this is only for all metal cable liners, not the ones for aluminum wire.  Also, remove any o-rings or non metal parts before cleaning.There are no small projects