My Riello M5 started making noise yesterday. The bearing at the fan end is failing.
Does anyone know the part number for replacement bearings?

 

It takes a standard 6211 sealed bearing can be bought at farm equipment dealers.

 

I seriously question Saves answer. For one thing, replacement would require disassembly of the motor. Also these motors are made in Italy doubt a farm equipment bearing would work. I could be wrong but I've never heard of anyone replacing the bearings in a Riello motor.

 

I have been replacing the bearings for ten years just did a f3 this week. It is about a one hour job, the hardest part is the fan removal as it may need to be heated with a propane torch. Wiring entails disconnecting the capacitor terminal #3 and # 11 both white. Next loosen the screws for the pump and disconnect the nozzle line ,pull pump from motor,do not lose plastic coupling. Next remove two Allen head motor screws and moter is in your hand.Motor disassemble, remove four bolts and gently tap each end off motor stator do not lose washer and spring,place armature in vice protecting with soft jaws , remove and replace both bearings.Be cautious installing new bearings use 3/4 copper pipe to seat them .The end covers may need to be warmed when installing.

 

OK, learn something every day. F & M series take the same bearing?

 

Appreciate your input. I may have a problem though. I went to a wholesaler that sells burner parts. I asked for bearings for a riello burner motor. He sold me # 6202.2RSR bearings not 6211. Seems to be quite a difference in the bearing sizes.
6202= Width: 11mm Outside Dia: 35mm Inside Dia: 15mm
6211= Width: 21mm Outside Dia: 100mm Inside Dia: 55mm
Could it be that the bearing on the fan end is smaller than the pump end?
The I.D. of the 6202 looks closer to the blower shaft than the 6211 would.
I came across a complete working riello burner for $50.00. I think I'll wait until it arrives, install it and then rebuild mine as a spare in case I was sold the wrong bearings. Don't want to end up with no heat.

 

I found another tip for removing the blower. Remove pump, Insert a large screwdriver into the slot where the pump couples to the motor to hold the shaft, using vise grips on the blower wheel collar you can twist the blower on the shaft to help release it. Don't forget to remove the set screw from the blower wheel collar, LOL. Haven't tried it yet but the method sounds reasonable.

 

I did give the wrong # as i have supply in my garage and did not look sorry for the mistake.

 

Thanks to saves, nice to know that the 6202 is the correct bearing.

 

You can fit a washer in the slots where the oil pump slides in to hold the shaft to release it.

 

If you squash to hard on the fan hub, with the vise grips you can warp it out of round so i will stick with a little heat.

 

Please note: 6211 is a Metric Bearing

 

Not sure how live this thread still is, but I just completed an investigation regarding the bearings for this Riello burner. My original Riello unit fried one of the two bearings after 15 years of service, so I was looking to replace them since the motor looked fine otherwise. The original bearings were stamped "SKF 6202-2Z / CNPLHT23".

I researched online and found that the 6202-2Z bearings were fairly common, but I was unable to locate much information on the letters and numbers after the hash mark above. So I contacted two specialized bearing vendors that advertised the ability to get just about any bearing. And I'm VERY glad I did.

Both vendors told me that the CNPLHT23 was a very specialized "callout" from the manufacturer. The first three (CNP) have something to do with tolerances, while the remaining ones (LHT23) are indicative of very high heat tolerance and indicate that the manufacturer applies a very specialized high-heat lubricant before sealing the bearings.

Finally, the replacement bearings are incredibly expensive given their small size - around $40 a pop!

Thought I'd pass this info along, I'd hate to see DIY'ers using a standard bearing that could potentially fail quickly given the requirements and working environment of these burner motors.

 

Presuming $40 for each end, that's $80 just in bearings. Probably cheaper to buy a whole motor.

 

Yeah, I would too... there are a lot of 'hackers' around though, aren't there?

Thanks for posting this info!

 

A standard 6202 bearing operating temperature is -20C to 110C should be able to operate in a room temperature environment.

 

Guess I just wasn't satisfied with the answers I got from the first two vendors I contacted (i.e. that replacement bearings for the Riello 3005843 were incredibly expensive), so I decided to try with a third online vendor. Found out some good news for the DIY'ers attempting to resurrect their old motors.

In response to my inquiry regarding my original bearings (SKF 6202-2Z / CNPLHT23), here's what a technician wrote back to me: "The suffix CNPLHT23 looks like an older part number which is calling out a grease code. SKF now makes what they call the "JEM", which has a high temp grease and, as a standard, is acceptable for major OEM electric motor manufacturers. The grease is rated for up to +230 degrees F.

I would suggest SKF part number 6202 2ZJEM. These are a very common bearing."

A quick search on the net shows that this bearing is indeed common and is considerably more affordable (generally $8 to $15 each). I'd be willing to bet that this SKF number could also be cross-referenced to other manufacturers with a bit of researching.

Hope this helps somebody out there!!

 

Thanks for researching that Hammar....

What you seem to be saying is that it's important to specify the correct suffix in order to get the bearings with the correct hi-temp grease... correct? and that one could conceivably end up with a bearing that didn't contain the proper grease if the correct suffix is not used ?

 

NJT: I believe you are correct in identifying that the suffixes are very important in these bearings. From my research, the "2Z" suffix indicates that the bearing is double shielded (i.e. shielded on both sides, in this case with steel and not plastic or rubber). Then after that, the letters and or numbers apparently have to do with not only the grease, but also the tolerances. Apparently the bearings for these Riello's, and also apparently for many if not all electric motors, require a "greater than normal" tolerance, to allow for expansion as the bearing heats up. I found the following web site helpful to me in my research:

Frequently Asked Questions | NTN Bearing Corporation of America

The only thing I can recommend is to try to get the spec sheet on any bearing you are looking to purchase, and try to nail down the equivalent specs to the SKF recommended above for the Riello. Good luck!