MPC2551 noisy fuser

[CableGuy]

Hello All.
I looked at a MPC2551 today that was making a noise which I've traced down to the fuser. It doesn't make the noise during copying, only when it runs down after the copy/print job is finished. In the output test, it only makes the noise at 60rpm but is quiet at 120 rpm. I've seen an RTB re noise from the fuser in thick paper mode, will go back and make necessary adjustments to see if that sorts my problem.
Any advice from my most knowledgeable colleagues, or anyone had a similar experrience?
Many thanks in advance
Cheers
Rich

[Klydon]

Re: MPC2551 noisy fuser

Here is a thread for the same thing on a 2051. http://www.copytechnet.com/forums/ri...ompletion.html

Basically, you need to lube the heating unit and also lube the shafts of the gears on the back of the fuser.

It is generally caused by the inside of the fusing film sleeve rubbing against the internal shell of the heat assembly.

The best way to fix is to get some high temp grease, take the unit out, take 1 end off and slide the sleeve almost all the way off. Grease the metal underneath (you should see where the paint is worn off by the scraping). Put it back together, then take the other end off, slide the sleeve to grease the area you missed the first time and then put it back together. (You don't want to take the sleeve off if you can avoid it as it can be difficult to get it back on).

I have done this several times and it works just fine. Also, make sure you don't get grease on the dual lamps.

[CableGuy]

Re: MPC2551 noisy fuser

Hi Klydon

Thanks for your speedy response. I will give it a go...
Reading through the thread, I find a post from myself pointing someone at the RTB....
I think my brain has finally turned to mush...
I'll go do a couple more lines of toner, that'll see me right
Cheers

[gasior78]

Re: MPC2551 noisy fuser

There's an unofficial remedy to avoid this kind of fuser damage in the future (Ricoh UK).

First thing to do: change fuser idling settings as follows:

SP1-121-001 ([Switch:Rotation Start/Stop] Time:After Reload) [100] →[0]
SP1-121-002 ([Switch:Rotation Start/Stop] Time:After Recovery) [10] →[0]
SP1-121-003 ([Switch:Rotation Start/Stop] Time:After Job) [10] →[0]


Also it is adviced to reduce fusing temp for Thick2 and Thick3 paper setting by up to 25deg (SP 1-105-21 to 28). In my case 25deg lower than default was much too low, I was getting partially fused full-color images. Eventually 10deg below defaults looks ok.

Anyway, another "improvement" from Ricoh

[CableGuy]

Re: MPC2551 noisy fuser

Thanks Gasior78
Just out of interest, did you have the fault in relation to printing thicker paper or was it in general i.e. normal 80gsm paper?

Cheers

[gasior78]

Re: MPC2551 noisy fuser

Thick paper issue it was. Fuser done 50% of its life and started to make this "farting" noise.

Fuser temp on Thick2/Thick3 gets slightly higher then it should when idling, causing the heating sleeve assembly to deteriorate and vibrate - that's what I've been told by Ricoh Tech Support. Hence some suggested changes in SP mode.

Cheers

[CableGuy]

Re: MPC2551 noisy fuser

That's interesting, mine has done 29% and is doing it after a 80gsm job. Haven't tried it on thick yet, will do tomorrow. Thanks

[gasior78]

Re: MPC2551 noisy fuser

it only makes the noise at 60rpm but is quiet at 120 rpm

Sounds quite right. When printing on Thick3 the speed is 60rpm. Same at fuser idling I think. 120rpm with standard 80g paper. Not too sure about Thick2 though.

Cheers

[Polarbear]

Re: MPC2551 noisy fuser

Have these got the same crap fusers as the MPC2051 with that foil hotroller that besically seizes??

[Zeldaman]

[CableGuy]

Re: MPC2551 noisy fuser

I spent an hour greasing that sucker up today, I couldn't get it to stop making the noise. The bugger is, all the bulletins point towards thick paper. This customer only does 80gsm and not at high volumes. I had a good look at the unit today when I had it apart... and the only conclusion I can make is, what the hell were they expecting?! Someone in the design depart should do the honourable thing and commit Harakiri.... It really is a pile of stinking Poo... I think once everything loosens up in there, the foil has no purchase on it's roller. When did Teflon applied to a roller go out of fashion? If it ain't broke don't screw with it.

[Klydon]

Re: MPC2551 noisy fuser

I spent an hour greasing that sucker up today, I couldn't get it to stop making the noise. The bugger is, all the bulletins point towards thick paper. This customer only does 80gsm and not at high volumes. I had a good look at the unit today when I had it apart... and the only conclusion I can make is, what the hell were they expecting?! Someone in the design depart should do the honourable thing and commit Harakiri.... It really is a pile of stinking Poo... I think once everything loosens up in there, the foil has no purchase on it's roller. When did Teflon applied to a roller go out of fashion? If it ain't broke don't screw with it.

Hmm, this isn't good. Did the shells underneath show signs of scraping? (Usually scrapes the paint off). Also, what type of grease did you use? We use a silicon high temp grease (white grease). Don't forget to pull the gears off and lube the posts either. Those will make a racket as well.

I have not had the thick paper issue, but have had several noisy machines and doing the lube job on them has fixed them every time. Sorry if it didn't work for you this time around.

[BLADE]

Re: MPC2551 noisy fuser

you could try shoving something (good ol paper wedge) under one corner to give it a bit of a twist. worked for me on a 4502 bogged in soft carpet

[Mark Bbb]

Re: MPC2551 noisy fuser

Here is a thread for the same thing on a 2051. http://www.copytechnet.com/forums/ri...ompletion.html

Basically, you need to lube the heating unit and also lube the shafts of the gears on the back of the fuser.

It is generally caused by the inside of the fusing film sleeve rubbing against the internal shell of the heat assembly.

The best way to fix is to get some high temp grease, take the unit out, take 1 end off and slide the sleeve almost all the way off. Grease the metal underneath (you should see where the paint is worn off by the scraping). Put it back together, then take the other end off, slide the sleeve to grease the area you missed the first time and then put it back together. (You don't want to take the sleeve off if you can avoid it as it can be difficult to get it back on).

I have done this several times and it works just fine. Also, make sure you don't get grease on the dual lamps.

I have tried this today, Klydon, but i can not get the metal part above the lamps and the same time put it on the bushings... Any help will be appreciated, thanks!

[Klydon]

Re: MPC2551 noisy fuser

Sorry, it has been awhile since I have been on here. Have you gotten this resolved?

Are you talking about having issues with getting the metal place inside the tube in the right spot to get the bushings back on? If it slips out, it can be difficult to get in the right spot again, not to mention that it is usually screaming hot.

I take the lamps out before removing either end to get them out of the way and avoid potential breakage of the lamps themselves.

I don't lube inside the metal casing, but rather on the surface of it where the fixing film rubs.

I also don't use a ton of grease simply because a lot of excess will come off when sliding the film back into position. I also go through and clean the outside orange sections of the pressure roller (usually with citrus cleaner) to make them have a better grip and I also clean off the outside of the fusing sleeve before putting it back in the fuser frame. If you are not careful, it can lead to jamming when you first put it back in the machine because the fixing film doesn't want to turn right away. You just have to keep working with it and it will eventually get going again and it will be fine.

Hope this helps and good luck!