MP4000/5000 SC324 Errors

[kannuki2]

I cleaned dev bearings with brakes cleaner and lube it with silicone grease. Works like a champ.

[nathan91]

I cleaned dev bearings with brakes cleaner and lube it with silicone grease. Works like a champ.

Thanks for the suggestion, kannuki2.

[taylinae]

Hello!

We've had ongoing problems with the dev units seizing on these bags of poo, throwing up SC324 errors. This isn't so much of an issue whilst the machines are under warranty (other than the inconvenience to the customers of course) but, once they are 12 months old, we begrudge paying through the nose for new units when there is obviously an inherent flaw in the design of these things.

Does anybody have any idea why this fault occurs and whether there are any preventative measures which can be taken to stop this?

Ta very much!

I am having this issue. I removed the corroded seal and used silicon grease and cleaned with a q-tip. works great....... for a few months..... The degraded seal is what is causing the lock and once the seal is out completely, it will work for a short while but then it will get packed with toner. I just got a call back for this MP 4001 and it has a DV unit lock again. My customer is a small business so they can't afford a whole new DV unit. I have decided that I am going to go in with a thin piece of rubber and an exact-o knife and grease to recreate the seal. I will let everyone know how this works tomorrow.

[leo34staffs]

I have had seized dev unit before and although the part for the bearing is not in the manual it can be obtained. (From a bearing supplier)

There us another thread on these bearings and gives the part number.

If I find one of our spare bearings I will repost with bearing details.

Good day.

[leo34staffs]

I have had seized dev unit before and although the part for the bearing is not in the manual it can be obtained. (From a bearing supplier)

There us another thread on these bearings and gives the part number.

If I find one of our spare bearings I will repost with bearing details.

Good day.

The bearing number is: 6901-2RS-C3

You can get 10 for about 15 quid.

[kannuki2]

Hi guys, Ricoh just released the bearing part number for the DV unit.

Ricoh part#D009 3000

Check out the Ricoh Bulletin
302 Found

[Brianneoe]

10-4 on the bearing being the problem,took one apart to confirm. Replacement is doable but its a real tight fit and it can only come out in one direction. You will need to go to a bearing supplier and have them match it up.
As far as a cause my guess its the low melt temp of the toner. Any one who has worked on this model can attest to the problem with the mag roller and the doctor blade building up layers of toner that requires a good cleaning with a crumpled piece of paper. The toner is the culprit but there is nothing you can do about it. I was thinking of doing the repair in the shop and using some type of sealant after I was able to dig out the bearing to let it cure. The bearing can't cost more than 4 bucks per at best and its worth a try.

Good luck

[Brianneoe]

Hi guys, Ricoh just released the bearing part number for the DV unit.

Ricoh part#D009 3000

Check out the Ricoh Bulletin
302 Found

That part number is for the DV unit, not the bearing. July of last year bulletin....

[kannuki2]

brian, you're right! My apology it is for a dev unit.

[billm]

I too have seen those bearing freeze up thanks for the Part number
Here is the bulletin BULLETIN NUMBER: D009/D011/D012/D013/D091/D092 – 053
SC 324.pdf





An SC324 occurs.



CAUSE:



Under certain operating conditions, developer can migrate into the Paddle Roller Bearing causing the Paddle


Roller to become difficult to turn. This results in high resistance to the Paddle Motor causing an SC324 to be


triggered.




SOLUTION:


Production Countermeasure:








The factory has applied a countermeasure to the development case for preventing developer from migrating


into the Paddle Roller Bearing since
March 13, 2010.