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Sturmey-Archer SW Drei-Gang-Naben: Unterschied zwischen den Versionen

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As mentioned above, my recommendation for a lubricant is fairly thin oil such as automatic transmission fluid (ATF). I think this is especially important for the SW because with heavy oil, pawls may tend to stick in their sockets and resist being tripped into position — ultimately leading to wear and/or chipping. I have also used motorcycle transmission oil (Gearsaver by Belray), which is a thin oil replacement for 80W gear oil (equivalent viscosity to 20W motor oil, but it's actually very thin at room temperature). It's a bit thicker than regular ATF, but otherwise seems very similar; it seems to stick to the parts a little better so a good film remains after several hours of idle time. 75W gear oil (same viscosity as 10W motor oil) may prove to be an excellent lubricant, as well, although there really isn't any need for much EP additive since there are no hypoid gears. I also recommend parking the bike in an upright position to eliminate the possibility of oil starvation of the right-side pawls.
Wie weiter oben bereits erwähnt, empfihlt Brian hayes zur Schmierung ein recht dünnes [[Öl]], wie ATF (Autoamtic Transmission Fluid, Getriebeöl für Automatikgetriebe von PKWs). Das ist insbesondere bei der SW notwendig, weil schweres Öl dazu beiträgt, dass die Sperrklinken in ihren Buchsen hängen bleiben und nur schwer in die richtige Position finden. Das wiederum führt zu mehr Verschleiß und/oder Absplitterungen. Er hat auch Versuche mit Getriebeöl von Motorrädern gemacht (Gearsaver von Belray), das als Ersatzöl für 80W Öl (vergleichbar mit W20 Motoröl vom PKW) dient. Es ist allerdings schon bei Raumtemperatur sehr dünnflüssig. Es ist etwas dickflüssiger als ATF, funktioniert jedoch vergleichbar gut; es haftet recht gut an den bauteilen und bildet auch nach einigen Stunden Ruhe noch einen guten Schmierfilm . 75W Getriebeöl (gleiche Viskosität wie 10W Motoröl) ist ebenfalls ein ausgezeichnetes Schmiermittel, jedoch gibt es mangels eines Kegelradantriebs keinen Bedraf an Additiven. Brian Hayse empfihlt, das Fahrrad immer in aufrechter Position zu parken, um zu verhindern, dass die rechts liegenden Sperrklinken austrocknen.
 
Alle diese speziellen Maßnahmen mit dem Öl sind hinfällig, wenn man federvorgespannte Sperrklinken baut. In diesem Fall sollte die Wahl des Öls keine all zu großen Auswirkungen haben.


All this special attention to oil will be rather unnecessary if using sprung pawls. In that case, I would imagine the selection of oil does not matter very much.


The recommended amount of oil in the hub at any given time is great mystery to me. These hubs tend to leak whatever oil they have, especially if you have the old-style metal lubricator cap. Sturmey-Archer have suggested two teaspoons poured into the internals upon initial assembly and replenishments of a few drops at a time. It is unclear to me what level of oil, if any, this practice was intended to maintain. Too much oiling doesn't do any harm to the hub, but it will ruin the effectiveness of the rear brake if one does not keep after the mess. I have adopted a "little and not very often" approach which seems to keep the hubs working well and relatively clean.
The recommended amount of oil in the hub at any given time is great mystery to me. These hubs tend to leak whatever oil they have, especially if you have the old-style metal lubricator cap. Sturmey-Archer have suggested two teaspoons poured into the internals upon initial assembly and replenishments of a few drops at a time. It is unclear to me what level of oil, if any, this practice was intended to maintain. Too much oiling doesn't do any harm to the hub, but it will ruin the effectiveness of the rear brake if one does not keep after the mess. I have adopted a "little and not very often" approach which seems to keep the hubs working well and relatively clean.
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