BH-C-284e, 2nd cassette jams

[Hansoon]

This BH-C-284e has only 100k on the clock. The 2nd cassette jams constantly. Paper is coming about 5 cm out of the separation rolls, then it stops at the tray-2 vertical roller. The jammed sheet of paper has barely visible sliding marks where the two dark grey rubber surfaces of the vertical roller were sliding.

I was in a hurry and without parts when I was there, but will go back tomorrow. I remotely recall that there was a bulletin in the past about a similar issue, advising to replace springs and/or putting shims somewhere in the side door to increase the pressure on the rollers.

Anybody having that bulletin or having any ideas about this issue please?

Hans

[kingarthur]

There are 2 things to try, yes, change the spring, if I remember correctly, it's actually a spare part in the paper feed unit, it's item 32, you change it for item 13

image.pngThe other thing to do, change item 2, they brought out a roller that was nobbly, instead of smooth, the part number is A5C1P00100

[copyman]

I was servicing hundreds of the 4 series at one time and never replaced that spring. You didn't mention if new rollers but I would replace 3 rollers, *clean one way clutches & scuff shaft where pin bearings contact shaft. Check the torque limiter for sep roller (should be tight but still able turn, if not put drop of oil on limiter spring or replace).

Another thing came to mind and have seen several times where only tray 2 would jam, make sure the plastic part that "bottom" hook on right side door latches to isn't broke (see red circle attached diagram)

[Hansoon]

Thanks guys,
since I'm an old fart in this business, I for sure replaced a short time ago all the take-up and separation rollers as well as the one-ways, though the machine had only 100k on the clock. Those rollers and one ways made less than 10k up to today, and yes, I used the ribbed roller too for the take-up, though not being convinced yet that they are much better than the otherwise good original orange Minolta rollers as used for the separation system.

However, this situation is different from worn rollers. When the take-up system rollers are worn, most of the time the sheet of paper is not even peeping out. Now, however, more than 5 cm of the sheet is visible and already between the vertical roller and its counterpart in the door. On the sheet are shiny markings where the vertical roller rubber parts are rubbing on the paper as it is being hold back and cannot forward, or the pressure of the vertical roller is not enough to pull it out of the separation roller.

Hans

[copyman]

That sounds exactly what happens when lower right side door is not latched at bottom because of the circled part in my last post being broken. Real easy to test, put slight pressure on lower part of right side door while running a test page.

Also what about the 2 mag clutches on tray 2 paper feed unit? Specifically the transport clutch.

Do you have another feed unit to swap out, even if just for testing purposes?

I wish you were in the states. I have six C224e & C364e all under 100K that pass decent prints I would give to you for free. I hate taking them to the scrap yard and pushing off back of truck I had a good relationship with those girls. Hardly any trouble during our time together!

[femaster]

This BH-C-284e has only 100k on the clock. The 2nd cassette jams constantly. Paper is coming about 5 cm out of the separation rolls, then it stops at the tray-2 vertical roller. The jammed sheet of paper has barely visible sliding marks where the two dark grey rubber surfaces of the vertical roller were sliding.

I was in a hurry and without parts when I was there, but will go back tomorrow. I remotely recall that there was a bulletin in the past about a similar issue, advising to replace springs and/or putting shims somewhere in the side door to increase the pressure on the rollers.

Anybody having that bulletin or having any ideas about this issue please?

Hans

You are correct. There was a bulletin about replacing the springs on the access door for the idle rollers that press against the tray 2 transport rollers. I could not locate that bulletin anywhere on the US KM site, but I did locate a thread on the forum here with information.

There was also a fix that someone had come up with, though I'm not sure if it's in the thread I linked to below, that involved adding washers underneath the guide plate that holds those white idle rollers. Pretty sure they were just a standard washer that was the correct size to fit the screws used to hold that guide plate on. I can't recall if they needed to used longer screws or not though.

https://www.copytechnet.com/forum/te...jam-code-20-02

[KMFLT3CH]

Yeah I've done the washer fix on several machines and it's always worked for me.

Direct ink to the pdf: https://www.copytechnet.com/forum/te...091#post795091

[Ziggy]

make sure the registration roller bushings aren't gummed up . I've seen these get gummed up and only cause problems from one tray

[copyman]

I've done the washer mod for tray 2 jamming just a few times. Again you can press on side door while printing and see if it helps. If it does then it could be what I posted above or add the washers to put more pressure on transport rollers.

I found the bulletins about the springs & washers. I've done the washers a few times but not the springs.
(see below)