irc 5051, 5250 blk developer errors e20-430-431-440

[pontiac]

how sensitive are these units. i am trying to get my parts dept. to order me a new blk developer unit. for testing, instead of going back out with another used one. thanks for replys

[fm100]

Hi,

They fail.
Replace as new.
On old units, the seal breaks at the gears and leaks the dev out causing all sorts of issues.

[dan7777]

how sensitive are these units. i am trying to get my parts dept. to order me a new blk developer unit. for testing, instead of going back out with another used one. thanks for replys

I have a lot of these machines. After a while the gears wear off. The 50xx have couplings in the back that fail. New style coupler has a pin in it (old black, new white).

[pontiac]

Thanks for replys, company finally purchasing new ones .
.