[Misc] Transfer Roller damaged, damaging Drum Unit

[CopierNerd]

bizhub 287/367

Transfer roller unit life is not yet expired but its ends are damaging the coating of drum unit from one side. The other end is perfect. One end is like scratched due to friction. Total counter is just 90K+
Strange for me. There is no reason of transfer roller damage without over life. DV tank looks good. Spacer is not out of the bearing. working fine. When i move drum manually it moves smoothly not even hard.

Transfer roller is properly seated.
Observed this fault in 2 different models.

any technical reason with solution prior replacement.

Pics attached.

[tsbservice]

Re: Transfer Roller damaged, damaging Drum Unit

Looks like classic drum to developing unit damage due to worn spacers/roll guides. If you are sure dev unit is good replace drum and transfer roller together.

[copyman]

Re: Transfer Roller damaged, damaging Drum Unit

Agree about the Dev spacer. Very common and always happens on the rear where all the pressure is with the gears. You can get a new style that has a bearing inside the collar. Or just buy a new Dev unit. They aren't very expensive.

[allan]

Re: Transfer Roller damaged, damaging Drum Unit

Been cutting transfer roller springs on the 283 machines to reduce the pressure of those stupid prongs on the transfer roller assay.
Its a piece of plastic running against the drum. Even been cutting the inner one clean off. By clean i mean with a carpet knife so there is no sharp corners.
Both tricks seems to work.

Then some machines have it and others don't. May be its how those parts come together.
Squaring up the hinges, look for bent stuff.

[blackcat4866]

Re: Transfer Roller damaged, damaging Drum Unit

bizhub 287/367

Transfer roller unit life is not yet expired but its ends are damaging the coating of drum unit from one side. The other end is perfect. One end is like scratched due to friction. Total counter is just 90K+
Strange for me. There is no reason of transfer roller damage without over life. DV tank looks good. Spacer is not out of the bearing. working fine. When i move drum manually it moves smoothly not even hard.

Transfer roller is properly seated.
Observed this fault in 2 different models.

any technical reason with solution prior replacement.

Pics attached.

Maybe it's just an optical delusion ... but the end with the gear looks kinda bent. Or maybe my one eye is just a little off center. ??? =^..^=

[CopierNerd]

Re: Transfer Roller damaged, damaging Drum Unit

Thank you everyone for sharing knowledge and experiences.

i will replace drum unit and transfer roller for sure but what is the reason or cause of damage? if i will not fix that the new parts will get damage too before completing life as you can see in pic. transfer roller life is 20% remaining and total counter is 96000.while the life of drum unit is 110k and transfer roller unit life is 150k.

[Woxner]

Re: Transfer Roller damaged, damaging Drum Unit

287 does not have a transfer roller that touchs drum. it touches tranfer belt. if its a 262 363 then remove some of the transfer roller spacers

[lazymangr]

Re: Transfer Roller damaged, damaging Drum Unit

the damage has nothing to do with transfer roller. the material is too soft to damage the drum. i have seen this on toshiba rather konica minolta and has to do with worn spacers between drum and developer. change dev unit among the drum and i think you will be ok.

[copyman]

Re: Transfer Roller damaged, damaging Drum Unit

Thank you everyone for sharing knowledge and experiences.

i will replace drum unit and transfer roller for sure but what is the reason or cause of damage? if i will not fix that the new parts will get damage too before completing life as you can see in pic. transfer roller life is 20% remaining and total counter is 96000.while the life of drum unit is 110k and transfer roller unit life is 150k.

You already have the answer, replace the rear dev collar or complete dev unit.

[CopierNerd]

Re: Transfer Roller damaged, damaging Drum Unit

the damage has nothing to do with transfer roller. the material is too soft to damage the drum. i have seen this on toshiba rather konica minolta and has to do with worn spacers between drum and developer. change dev unit among the drum and i think you will be ok.

If it is Dev spacer not transfer roller ends then it should not be damage from here as in picture. Transfer roller touches the drum right at this point not the spacers. I have checked it. Spacers are fine. I cannot change the developer tank. It is not that simple. If it is spacer which is faulty then why should i replace whole developer tank. The life of tank is 590K. and you cannot get spacers only.

[CopierNerd]

Re: Transfer Roller damaged, damaging Drum Unit

Been cutting transfer roller springs on the 283 machines to reduce the pressure of those stupid prongs on the transfer roller assay.
Its a piece of plastic running against the drum. Even been cutting the inner one clean off. By clean i mean with a carpet knife so there is no sharp corners.
Both tricks seems to work.

Then some machines have it and others don't. May be its how those parts come together.
Squaring up the hinges, look for bent stuff.

That is really a good idea, but can you please tell me that if i cut that spring and lower the tension of transfer roller then why that spring is there? Did the Engineer of Designer/manufacturer was fool to put that spring there? The spring is just to provide tension so that paper touch the drum firmly and equal and even print transfer is done.

[tsbservice]

Re: Transfer Roller damaged, damaging Drum Unit

Actually there is no need for developing unit spacers to touch drum at worn area.
Magnetic brush will do this damage due to rear distance to drum is narrowed.
Do they use OEM toner? If not that may be the reason.

[Andyboachie]

Re: Transfer Roller damaged, damaging Drum Unit

Actually there is no need for developing unit spacers to touch drum at worn area.
Magnetic brush will do this damage due to rear distance to drum is narrowed.
Do they use OEM toner? If not that may be the reason.

Can't there be an obstacle in the drum's revolution before paper passes. A raised area or an object along the pathway of the drum's turning can as well cause this problem. Check any such probable obstacle.

[darry1322]

Re: Transfer Roller damaged, damaging Drum Unit

Can't there be an obstacle in the drum's revolution before paper passes. A raised area or an object along the pathway of the drum's turning can as well cause this problem. Check any such probable obstacle.

The usual problem is that the rear developer unit spacer wears down causing the space between the developer brush and drum surface to be reduced enough that the developer brush starts to wear down the drum coating until it begins to flake off the drum surface.

[CopierNerd]

Re: Transfer Roller damaged, damaging Drum Unit

Actually there is no need for developing unit spacers to touch drum at worn area.
Magnetic brush will do this damage due to rear distance to drum is narrowed.
Do they use OEM toner? If not that may be the reason.

They are using OEM toner, if not then how can using counterfeit toner affect drum from this side?
I agree magnetic brush can damage due to narrowed distance.