Developer units

[vincent64]

Been seeing a lot of the newer dev. units stripping gears, going over toned and having to be re-built, by a lot, I have done 4 so far and the other guy has done 1, this means all 4 gears, seals, and bushings, new developer, so far its been all black units and I think one cyan unit a while back.
These are the new type, ES 3055 ect...only thing I have found on exchange is a tech tip about using some form or oil or grease on the oil seals they call them.
Has any of my fellow techs ran across this, oh and on taking the unit apart to-rebuild, there is no sign of any kind of lube on the seals, so I put it back dry.
The gears have such fine teeth, it wont take much junk in them to wear them out.
Thanks ya'll

[gliderider]

Re: Developer units

Hi:

We found that the hi speed models 4555 and 5055 don't seem to be having the problem that the low speed models have.
What we found is the high speed developer units use 4 bearings (FO-01959000) instead of bushings. Also one gear
(ASYS-GEAR-IDLE-21Y) (6LH54169000) with a bearing inside it. We are substituting these on all our low speed models and
also changing out the augers if the ends are worn down. The pn for the seals are (4401949290). It's too early to tell the longevity
of these modified developer units yet, but so far so good! We feel that the bearings should be superior to the cheap bushings though.

Andrew

[blackcat4866]

Re: Developer units

I've seen two seized black units, and one seized cyan unit. I does seem to be the 3055 and lower model group. We seem to have plenty of scrap units to swap in, so I haven't needed to rebuild.

The grease is and old-time tech trick. When the developer seals are completely shot, a smear of grease can buy you a couple of weeks until the new parts arrive. I would not consider it any kind of preventative measure though. Grease or no grease, if developer is sneaking past the seals, it will scour the shafts and leak. =^..^=