Bizhub 350 BW

[JR2ALTA]

Re: Bizhub 350 BW

Known issue. Just by virtue of replacing the drum you "unsettled" the Dev unit seals. This bit me many times. Best practice to replace the Dev, Dev unit and drum at same time. Transfer roller can last life of machine if you ask me.

[allan]

Re: Bizhub 350 BW

Are you saying you can get 200-250k out of a drum? Does that include the developer & developer housing or do you change developer at 60K and put old drum back in? Reason I ask is one very common problem I had when rebuilding the units for the 2nd time was the rear mag roller collar would wear and eat into drum. Once Han's (member here) starting selling a modified collar I would change when rebuilding and could use the developer unit indefinitely after that.

Yea sure even up to 400K depending on volume.

I would agree 220K average. There is a whole tweak list on this engine.

1 Replace the damper pads on the toner supply assy solenoids asap in the case of a 250/350 all the rest apply up to the 223/363/423 machines.
2 Throw out the original thermistors and put kick ass 3de party parts in there.
3 Remove any drum gear pieces from the drive unit.
4 Chamfer the edge of the drive gear on the drum. You remove the shearing points and the drum gear is much much less likely to chew itself.
5 Replace the DS rolls on every dev change inspect the dev seals even started super glueing(on own risk) the new dev seals in place on the doctorblade fixing and texturerise any shiny bands on the mag roller.
6 Make sure if the there is no crap on the charge unit like the previously badly scraped drums green opc shavings .
7 If the transfer roller drum guides are sharp replace the roller. Mmm 3d printer got some work.
8 Cut the transfer roller spring by about 2 turns that would greatly reduce the pressure applied to the drum guides and your paper guide,
9 But thicker stock could cause a bump like a jitter when the paper hits the guide and the transfer roller will carry toner to the back side of the next page.
10 Only other thing is the oneway feed clutch the surface it runs on needs to be roughend up with a file or scored with a blade I like the latter because it makes the pins bounce.
11 Use Dry cleaning like spray to clean the clutches.
12 If you take care of the dev tank by keeping crap out of it the dev goes on and on.


Was bored.

[wkwar]

Re: Bizhub 350 BW

Hello Alan

wow.... trying to digest this.

We did replace the entire developer unit, developer and transfer roller. The unit work fine for a while than started to leave toner on the back of some pages especially on duplex copies. than we just notice that it is chewing the transfer roller. so what did we miss?

[allan]

Re: Bizhub 350 BW

Replaced the transfer roller?
HV board?

Was not just bored but completely sloshed when i wrote that post after being out...

[Copier Addict]

Re: Bizhub 350 BW

just noticed that the new developer unit is eating the drum. We replace the entire drum/developer and developer unit. This is OEM unit and we had less than 2K copies on it. Almost seem like the issue with bad bearing/seal that was on earlier unit post ?. However we just replaced this one. See attach picture.

When replacing the transfer roller use the one for the BH423.

[wkwar]

Re: Bizhub 350 BW

Hello there

did not replace the transfer roller. previously replaced the drum, developer and developer unit. do i need to replace the seal on the developer unit?

[wkwar]

Re: Bizhub 350 BW

Hello Copy addict

Just to make sure, use the transfer roller from a Bizhub 423 instead of the Bizhub 350?

[allan]

Re: Bizhub 350 BW

Hello there

did not replace the transfer roller. previously replaced the drum, developer and developer unit. do i need to replace the seal on the developer unit?

If the collar seals are broken or have holes in them change them. The seals covering the ends of the mag roller.
Change the transfer roller out to check if there is good change. Seen faulty HV boards do the same thing. So that would be next.
Or it could be something that you overlooked on the IU.

Is the drum covered in toner if you open the side door?
Does it feel gritty like there is developer in the mix?
Do you have experience on these machines?

Hello Copy addict

Just to make sure, use the transfer roller from a Bizhub 423 instead of the Bizhub 350?

Why? The only clear different is the removal of the black plastic like material covering the guide.
That got worn away after the first life cycle. Cheaper?

[Copier Addict]

Re: Bizhub 350 BW

Hello Copy addict

Just to make sure, use the transfer roller from a Bizhub 423 instead of the Bizhub 350?

Yes, we have found they cause less damage to the drum and they cost either the same or a little less

[allan]

Re: Bizhub 350 BW

Yes, we have found they cause less damage to the drum and they cost either the same or a little less

Someone told me to use the 250 roller assy on the 223 machines for the same reason.
Next time i have both in the same place i will take a vernier to them.

[srvctec]

Re: Bizhub 350 BW

just noticed that the new developer unit is eating the drum. We replace the entire drum/developer and developer unit. This is OEM unit and we had less than 2K copies on it. Almost seem like the issue with bad bearing/seal that was on earlier unit post ?. However we just replaced this one. See attach picture.

Mag roller might be worn out if the ds rolls weren't replaced with the new ds roll kit A1UDR90100. We've been using those on the 350 series since they became available with good results, although the kit was made for the 423 series.

So, replace the drum and developer unit again (add new developer) but install the ds roll kit into the new developer unit and toss the black stock ds rolls.

[wkwar]

Re: Bizhub 350 BW

hello srvctec

the ds roll kit replaces all the bearing and seals in the developer unit correct?

[allan]

Re: Bizhub 350 BW

No it does not include the dev seals.

[wkwar]

Re: Bizhub 350 BW

sorry for so many questions, so the DS ROLL KIT A1UD371800 replaces the bearings inside the current developer roll correct?

on the transfer roll, should i get the
Bizhub 350 - PN 4040R72500 or
Bizhub 423 - PN A1UDR70500

[Copier Addict]

Re: Bizhub 350 BW

sorry for so many questions, so the DS ROLL KIT A1UD371800 replaces the bearings inside the current developer roll correct?

on the transfer roll, should i get the
Bizhub 350 - PN 4040R72500 or
Bizhub 423 - PN A1UDR70500

We haven't bought a BH350 transfer roller, 4040R72500, in five years and there have been no ill effects. And there is less damage to the drum