RIELLO RDB FAN MOTOR BEARINGS

[boulter]

Just dismantled the motor to replace the bearings but the washer & spring fell out & didn’t see from where.
Are they both in the same end of the shaft under the fan cover or is the washer at one end & the spring on the other end of the shaft ?
Thanks

 

[harryarcos]

I expect you have solved the problem by now, but I am thinking that new bearings are required on my Riello motor after it suddenly started making a whining noise. I was hoping to attach a sound file (.m4a) but if it is possible, it does not appear to be straight forward. Anyone know how long the bearings may be left, before serious damage?

 

[oilhead]

You need to investigate the reason for the noise. It is usually allied to a leaking shaft seal on the pump.

 

[Burnerman]

These bearings don't have huge loads to deal with so no need to panic and they are easy enough to replace with the motor on the bench.
They are usually 62 series - 6202 being very popular.
Overnight delivery from simplybearings.co.uk
I prefer metal sealed bearings (zz type) rather than rubber sealed (rs) for longevity.
John

 

[harryarcos]

Many thanks for your replies. I have had problems with leaking oil seals before - Danfoss RSA - and there was a fair bit of oil on the plate below. Sounds like a strip down, so I will replace the bearings anyway and inspect the pump.

 

[harryarcos]

Did not get too far with replacing the bearings. The fan boss was rusted to the shaft and just would not budge, even with a little heat. Did not want to risk damaging the fan, so all back together and thankfully still working. There was no oil on the oil pump shaft, so will just have to put up with the noise until the weather improves. There was also some rust on the fan blades. Is it normal for the fan to rust in this way?

 

[Burnerman]

If you visit HWOS (Heating World Of Spares) you'll be able to get what you need .......motors are keenly priced too, and the catalogue is downloadable. Fans are also there.
Mail order is fast and reliable.
Fans have often a thin cadmium plating, so as they age rust does develop. They are very fragile and easy to put out of balance so canny how you go with them.
John

 

[harryarcos]

Thanks John. I should of searched on the site before asking the question about rust as clearly that is a problem in removing the fan. If I had designed it, the motor would have had a stainless steel shaft and the fan boss would have been made of brass. Of course, Grant would have not sold as many spare parts at outrageous prices!