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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.
Quote from: McCabe-Thiele (Ted) on January 14, 2024, 04:13:49 PMI 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.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?
No mate, originals had no inner seals, saved a couple of yen per bearing and with millions fitted it adds up, same reason for jis screws
Indeed i have a spare d ring as I lost mine and bought another from Oddjob, then found the original!