SOHC.co.uk Forums > CB500/550
Rear bearing advice
DomP:
I'm stripping my rear wheel to rebuild it with a replacement hub to rectify the split lining. I've drifted the old bearings out and have noticed the inside of the races were fitted with the seal removed, should I do this with my new NTN bearings? One other question, I can't find a replacement 'd' ring that seals the hub to the sprocket carrier, can I just fit an appropriately sized oring?
McCabe-Thiele (Ted):
I believe the later replacement wheel bearings are the sealed type so you fit them as supplied with the seals on both sides - sealed for life so as to speak like most modern wheel bearings.
I believe the D ring was used rather than a straight O ring due to the unusual movement of the hub seal more of an ossilation effect rather than the normal rotation or static arrangement used with O rings.
Oddjob:
There are a couple of members who may have a spare D ring. We all bought some from Erny a year or so ago, Sesman bought 2 and did say one was spare, I think the other was Mickwinf? I bought 5 as I expected them to be in demand but I've sold 3 of them and I need to keep the last 2 for myself.
It may be that Erny can have some more made, might not be a bad idea.
Got to warn you though that these ain't cheap, around 8 euros to have them made IIRC plus of course P&P.
Laverda Dave:
--- Quote from: McCabe-Thiele (Ted) on January 14, 2024, 04:13:49 PM ---I believe the later replacement wheel bearings are the sealed type so you fit them as supplied with the seals on both sides - sealed for life so as to speak like most modern wheel bearings.
I believe the D ring was used rather than a straight O ring due to the unusual movement of the hub seal more of an ossilation effect rather than the normal rotation or static arrangement used with O rings.
--- End quote ---
I don't know if this applies to the 500/550’s but on the 400/4 there is a spacer that fits between the two bearings either side of the hub. The spacer has three prongs on each end and these appear to locate between the exposed ball bearings. I ordered new bearings and these arrived with the seal fitted on both sides whereas the original bearings were open on the side that fits into the hub. I assume this is to allow the spacer prongs to fit. Therefore should I remove the inside seal of the new bearings to allow the prongs to locate otherwise the seal will prevent this?
DomP:
--- Quote from: Laverda Dave on January 14, 2024, 09:23:15 PM ---
--- Quote from: McCabe-Thiele (Ted) on January 14, 2024, 04:13:49 PM ---I believe the later replacement wheel bearings are the sealed type so you fit them as supplied with the seals on both sides - sealed for life so as to speak like most modern wheel bearings.
I believe the D ring was used rather than a straight O ring due to the unusual movement of the hub seal more of an ossilation effect rather than the normal rotation or static arrangement used with O rings.
--- End quote ---
I don't know if this applies to the 500/550’s but on the 400/4 there is a spacer that fits between the two bearings either side of the hub. The spacer has three prongs on each end and these appear to locate between the exposed ball bearings. I ordered new bearings and these arrived with the seal fitted on both sides whereas the original bearings were open on the side that fits into the hub. I assume this is to allow the spacer prongs to fit. Therefore should I remove the inside seal of the new bearings to allow the prongs to locate otherwise the seal will prevent this?
--- End quote ---
Exactly my thoughts
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