KM-5050 Tractor Marks

**jockey** · 01-24-2011

Has anyone come up with a solution to the problem that mrfuser described? I have had the "tractor track" problem on several machines in the last 10 months usually just wipping the mag roller off will make the problem go away but I want to find out what the actual cause is. I use to have this same problems on the FS-3800 printers a few years ago at that time tech support said it was caused by moisture getting into the dev unit causing the developer to clump and stick to the mag roller. What happens is the developer will clump up on one end or sometime all the way across the mag roller causing the tractor like tracks, you can see it clearly on the mag roller, wipping it off will usually take care of the problem. I have one machine where I have wiped it off several times, two weeks ago I replaced the dev unit and now the problem has returned, has anyone else had this problem and figured out what is causing this?

**blackcat4866** · 01-25-2011

On Canons we called it "mottling". Aftermarket toner can contribute to the problem, but I've come to the conclusion that this machine does tend to mottle more than many others. Other factors include high environmental humidity. Changing the developing unit may help, but no guarantees. =^..^=

**manoj1686** · 01-25-2011

Try to replace the toner what u using....are you using the genuine toner or sub standard..b4 replacing toner clean and blow the toner inside the dev unit.

**DWise** · 01-25-2011

Originally Posted by blackcat4866

On Canons we called it "mottling". Aftermarket toner can contribute to the problem, but I've come to the conclusion that this machine does tend to mottle more than many others. Other factors include high environmental humidity. Changing the developing unit may help, but no guarantees. =^..^=

We've seen this problem a lot, and 99% of the time the customer is using generic toner...

You can wipe the roller but the problem will return... We've vacuumed all of the generic toner out of the developer before and added OEM and this has cleared the problem also... Good luck

**jockey** · 01-25-2011

Ok thanks guys, this customer is using generic toner, will switch to OEM and vacuum dev unit and see what happens

**vikingmita** · 01-29-2011

have had this with several machines using original kyocera toner too, so that's no warrenty. it's as simple as humidity finding it's way into the mag roller, and small lumps stick to it. more of a non-existing thing in correct tempered and correct humid environments.