Worcester Heatslave 20/25 electric motor

[Avocet]

The back bearing in our Worcester Heatslave is screaching. It shuts up when I put a drop of oil on it, but I'm sure its days are numbered. I've got the motor details off the plate and it's an AEG EB 95C35/2 (90 Watts). The other number on the plate is 9E 082636 472-2F 2033.

When I search online, I get a few hits (mostly in Germany) for "Hansa" motors - which certainly look similar. Are they a direct replacement? Surely, someone in the UK sells motors?! Can anyone recommend a supplier, please?

 

[Burnerman]

Fitting new bearings is dead easy, but if you want a motor, www.hwos.co.uk do them......around the £40 mark or thereabouts.
Another one is www.heating-parts.co.uk and the picture should match exactly what you want.....maybe a bit pricier!
John

 

[Avocet]

Thanks John. I did wonder about just changing the bearing, but the motor is 20 years old now, so I wondered whether it was worth it? Do they usually last for ages with jus ta bearing replacement? Also, when I had it out, it looked like the motor casing needed to come apart to change the bearings, so that was a bit offputting!

I can't find any AEG ones on there (but plenty of them look very similar). Are these things relatively standard? Is it a case that any old 90Watt motor will do? Or is there a way to cross-reference the AEG part number with one of those Bentone, Numax or Riello motors?

 

[Burnerman]

Worry ye not about changing the bearings......these are brushless motors so nothing to catch you out! I'll wager the bearings are 6202 zz (zz being metal sealed).
I'm certain your burner is an Inter B11 c......that may help with your search. Avoid choosing other motors ......I tried that once and it bit me back. The mounting flange was identical so I thought I was home and dry....turned out the bloody thing spun in the opposite direction
John

Allow me to edit.....looking at heating-parts it seems to be part number 251888.
J.

 

[leakydave]

A choice of 70W or 90 W single or double ended. Save mucking about with bearings... buy a new motor. Fairly easy to change and see how easily the oil pump shaft turns when you marry to two together.

 

[Avocet]

Worry ye not about changing the bearings......these are brushless motors so nothing to catch you out! I'll wager the bearings are 6202 zz (zz being metal sealed).
I'm certain your burner is an Inter B11 c......that may help with your search. Avoid choosing other motors ......I tried that once and it bit me back. The mounting flange was identical so I thought I was home and dry....turned out the bloody thing spun in the opposite direction
John

Allow me to edit.....looking at heating-parts it seems to be part number 251888.
J.

Thanks John. That certainly does look like mine! Is it common for them to be interchangeable? The bearing replacement option is appealing, but the thought of stripping it to find out what size they are, and then reassembling it all while I wait for them to arrive, only to strip it again is less appealing. Might do it at my leisure so that I have a spare though!

 

[Avocet]

A choice of 70W or 90 W single or double ended. Save mucking about with bearings... buy a new motor. Fairly easy to change and see how easily the oil pump shaft turns when you marry to two together.

Thanks Dave. Mine's definitely a 90W one and it has a shaft on the "fan" end, and a female recess on the oil pump end.

 

[Agile]

Thanks John. That certainly does look like mine! Is it common for them to be interchangeable? The bearing replacement option is appealing, but the thought of stripping it to find out what size they are, and then reassembling it all while I wait for them to arrive, only to strip it again is less appealing. Might do it at my leisure so that I have a spare though!

It may not be that difficult.

The 6202 is 15 mm bore and 35 mm outside.

So all you really need to do is to measure the shaft diameter without any dismantling.

They are only about £4 each so hardly the end of the world if it was wrong. Even if it was you could resell them on Ebay!

Tony

 

[Avocet]

Good point! (and I can always use small bearings for other applications)!

 

[Burnerman]

Its only my experiences - which are neither vast nor insignificant - I have come to grief twice by being persuaded to by a motor that would 'substitute'.......one spun the wrong way (which wasn't that easy to initially diagnose, curiously enough) and another, the capacitor was in the wrong place and wouldn't fit into the burner casing.
The correct motor will be identical, even to the ventilation slots on the end.
Most motors are 6202 at both ends but its difficult to measure the main shaft diameter without dismantling anyway - although the oil pump drive end isn't reduced in diameter.
Of course, you could buy new and then recondition the old motor!
John

 

[Avocet]

The "fan" end of this motor looks quite thin (maybe 1/4")? The oil pump drive end of this motor looks much larger (maybe 3/4") and has a female socket in it, into which a nylon adapter sleeve goes. The oil pump shaft then pushed into the nylon sleeve. Of course, where the bearings are, I guess the shafts could be the same diameter?

 

[Agile]

It would be fairly unusual on a small motor for the bearings not to be exactly the same.

But I cannot comment on the ones that you have.

Tony

 

[Burnerman]

They are the same, Mr. A.....its the much old 10 series burner motor that has one smaller bearing.
John

 

[Avocet]

Right! That settles it! I'll give the bearings a shot. I can get genuine SKFs for £3.41, so what the hell! It's near the end of the month and I don't really have the spare brass to shell out on a complete motor. I might go for the rubber sealed 6202 RS, rather than the metal shielded "zz" ones. The pump was leaking a year or two ago and I wonder if the kerosene maight have washed the grease out of the back bearing at the pump end of the motor? (That's the one that is noisy).

 

[Burnerman]

Originally these things had a RS bearing next to the pump and a ZZ one at the other end....personally I don't think it makes any difference at all - you'd soon smell the kero if it was leaking!
Just for the hell of it I opened one of these sealed bearings a while ago, and there was precious little lube in there anyway which could be part of your whining issue.
When you re-seat the pump, observe the 3 securing screws, and turn them equally so the pump remains central.....it doesn't have to be tight.
John