MP55/65/7500, 2051/2060/75etc dev bushings

[aabarnes1]

We have over a hundred of these types in the field, mostly 5500's, a lot of them are bursting the dev bushings lately and we all know the problems that causes. We now have to replace them every 150k as a result. Some of the machine have as little as 600k, others have 2 mill plus, anyboby else having similar. I know what the maual says and I am aware of the pm schedule, so please reply only with practical help brought about by experience. Thanks.

[TonerMunkeh]

We change the dev bushings every 2nd dev change, approx 1.2m. Older machines with low mileage it's basically inspect the dev unit every EM call.

[Vollegaaz]

We change them every PM (600k)

[Codex]

i have the same problem with some Aficio 2075 and Mp's, i called RICOH and they know the problem, they recommend to change the bushings every PM, and if the problem occurs anyway there is nothing to do, you have to change the Developer Unit , because once the Developer paddle roller is damaged it's over.....

[tcs04]

I have actually made a mylar shield on certain machines that sits on the frame above the vertical transport and stops the dev falling into the paper feed station gears. This has saved the lovely job of rebuilding feed stations a few times.

[Codex]

I have actually made a mylar shield on certain machines that sits on the frame above the vertical transport and stops the dev falling into the paper feed station gears. This has saved the lovely job of rebuilding feed stations a few times.

i did exactly the same!!!, and it works and it safed me a lot of time

[aabarnes1]

I have actually made a mylar shield on certain machines that sits on the frame above the vertical transport and stops the dev falling into the paper feed station gears. This has saved the lovely job of rebuilding feed stations a few times.

where exactly did you position this makeshift mylar- it's a great idea.

[Dis]

i change with AF550 small bushings, it had berings and more fixed, but using low quality compact toner, so just same as 200k and will be start leaking a bit, but sometimes can be untill 500k.(maybe depend on user, and enviroment.)

[Dis]

the benefit for using those bering bushings was leaking will be very down, safety to feeding unit, if the machine without modified a shield on it, but need to change it early, or will be demage on Developer paddle roller.

[tcs04]

where exactly did you position this makeshift mylar- it's a great idea.

Mmmm... I did have a picture but deleted by mistake. Hope this makes sense!!

If you had the reg unit out of the machine, you can cut a sheet to fit around the transfer waste toner pipe and extend across to JUST outside the edge of the paper path, sticking to the top of the vertical transport unit above the V T door and to the edge of the main machine frame above the lower right cover. this will cover the main drive units, you could do similar at the front for the motors.

[Codex]

i think it's not necessary to put out the reg unit (but it's better if you do that), i fit a sheet of thick paper or Mylar between the vertical transport and the machine frame

before.jpgBEFORE

after.jpgAFTER

[tcs04]

That's just about it, but it's easier to ensure a good seal and stick the shield to the frame if the unit is out, especially the first time.

[Codex]

yes, normally i stick the shield, but this was just to make the pic, ahaha.

[tulipano]

mp 7500

tell me what are the bushings that wear out with the codes of parts, thank you very much. I have the same problem on a ricoh mp 7500.

[medallo]

from experience .. I have been able to solve this with many photocopiers.
bushings must be GREASE to lubricate the shaft.
This is the answer for the shaft and bushings last much longer.
Should be lubricated with high GREASE and better if it goes through a tempering process to the shaft.

At Aficio 1075 I will edit my bushings, so they are with bearings and seals, thus revealing no longer bounce, but stops U.R., thus revealing no longer bounce, but stops development unit.