AR-M455 Eating Developer Units

[Buddy]

Hi All,
I have an AR-M455 that is destroying developer units. I have put two new units in this machine and both DV units lasted a couple of weeks! Eventually the mag roller locks up. I noticed on the front side there is a piece of mylar that gets mashed. It looks to me like there is a lot of pressure being put on the mag roller, on the front side. I looked at the mechanism that lifts the dev unit and it looks OK.

What am I missing?

Thanks

[benalvarez]

Re: AR-M455 Eating Developer Units

All this and no grinding noise?

[benalvarez]

Re: AR-M455 Eating Developer Units

Are your development units brand new? Have you pulled the rear panel and determined that the main gear assy. is working well? Is the developer still in the units? Or is it getting pulled out by the drum?

[Buddy]

Re: AR-M455 Eating Developer Units

Brand new units.

[Buddy]

Re: AR-M455 Eating Developer Units

As I mentioned, they are locking up to the point that the mag roller is very difficult to turn. Still have all the dev in them.

[ZOOTECH]

Re: AR-M455 Eating Developer Units

As I mentioned, they are locking up to the point that the mag roller is very difficult to turn. Still have all the dev in them.

Is the left hand slide-out door latching properly, specifically the rear latch?

[Buddy]

Re: AR-M455 Eating Developer Units

Yup, door latches fine.

[QCCDUDE]

Re: AR-M455 Eating Developer Units

Can you post a photo of the dev units

[Buddy]

Re: AR-M455 Eating Developer Units

Don't have a pic Dude. The unit is still in the machine. Threw the others out. I can tell you there is a wear mark around the mag roller near the front side. (as you're looking at the machine) The drum is worn in the same place, so the drum is putting pressure on the mag roller, but I don't see anything wrong with the drum unit.

[benalvarez]

Re: AR-M455 Eating Developer Units

Is it possible that the drum housing could be warped or cupped from the fuser's heat? Remove the drum housing and lay it on a flat surface, like a desk and see if it rocks? Just a thought...

[QCCDUDE]

Re: AR-M455 Eating Developer Units

Also try different drum housing unit...

[blackcat4866]

Re: AR-M455 Eating Developer Units

Clearly something is making contact with the mag roller. It should be fairly easy to determine since the only things you need to concern yourself with are within a couple of millimeters of the mag roller. And you can probably discount the inside of the developing unit. I think I would remove the drum unit, and re-insert the developing unit and latch it in. Then remove the back cover and run the developing drive manually by spinning the gear by hand. If I remember correctly there is a clutch in the drive chain that you'll have to remove. If anything is touching the mag roller you should be able to identify where it's scraping. It will be on the registration assembly or on the drum assembly. Those are the only assemblies close enough to make physical contact. Pictures please. =^..^=

[nmfaxman]

Re: AR-M455 Eating Developer Units

What was the original call for when this started?
Sometimes you have to take a step back to move 2 steps forward.

[Buddy]

Re: AR-M455 Eating Developer Units

The original code was an L4? Whatever it was, once I replaced the dev unit, the machine ran for three weeks without a code.

[QCCDUDE]

Re: AR-M455 Eating Developer Units

L4-02 drum motor lock, sounds like somethings binding your motor drive what does the drum housing look like any scraping or abnormal wear on it.