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Wartung von Sturmey-Archer Acht-Gang-Naben: Unterschied zwischen den Versionen

→‎Technik: Übersetzungsanfang
(Übersetzungsanfang)
(→‎Technik: Übersetzungsanfang)
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==Technik==
==Technik==
A few technical issues are important when specifying, installing or rebuilding these hubs:
Einige technische Aspekte sind wichtig, wenn man diese Naben spezifiziert, montiert oder wieder aufbaut:
* Nach der zuverlässigsten Quelle, die [[John Allen]] hat, wird der rechte Kugellagerring gegen den Uhrzeigersinn vom Nabenkörper abgeschraubt. Nach öffentlichen Informationen von Sturmey-Archer gibt es Varianten für beide Richtungen. Am Kugellagerring sind nicht die Spertrklinken befestigt - das ist anders als bei den meisten anderen Sturmey-Archer Nabenschaltungen.
* Es gab ein paar Zuverlässigkeitsprobleme mit diesen Naben - das scheint jedoch bei aktuell produzierten Modellen Vergangenheit zu sein.
* Diese Naben werden mit [[Fett]] geschmiert und haben keine Wartungsöffnung, über die [[Öl]] eingefüllt werden kann. Man kann ein wenig Öl auftropfen, nachdem man den linken Kugellagerring abgeschraubt hat. Diese Naben sollten regelmäßig auseinandergebaut und neu geschmiert werden. Bei den neuen Modellen ist das Auseinanderbauen sehr unkompliziert. Es kann von Vorteil sein neue Naben vor dem Einbau neu zu schmieren.


* The right-side ball ring unscrews counterclockwise from the hub shell, according to the most reliable . information we have. Sturmey-Archer has published information indicating both directions! This ball ring does not include a ratchet, unlike those of most Sturmey-Archer internal-gear hubs.
* Reliability has been an issue with these hubs, though it appears to be improving with newer production.
* These hubs are grease-lubricated and have no port through which oil can be introduced. Oil can be added after unscrewing the left ball cup. These hubs should be disassembled and relubricated periodically. Disassembly is fairly easy with the newer models. It may be advisable to relubricate before installing a new hub: see advice here.
* Stout antirotation washers should be used, preferably both inside and outside the dropouts. See advice here. Also, gear down and spin rather than pushing hard in a high gear. As the lowest gear ratio is unity, torque on the axle decreases, the lower the gear.
* Stout antirotation washers should be used, preferably both inside and outside the dropouts. See advice here. Also, gear down and spin rather than pushing hard in a high gear. As the lowest gear ratio is unity, torque on the axle decreases, the lower the gear.
* The sprocket is unlike the one used on most other internal-gear hubs. The center hole is much larger, and the sprocket is available only with 20, 23 or 25 teeth. The sprocket has three lugs and is held in place by a circlip (snap ring). The 20 and 23-tooth versions are flat; the 25-tooth version is also available dished.
* The sprocket is unlike the one used on most other internal-gear hubs. The center hole is much larger, and the sprocket is available only with 20, 23 or 25 teeth. The sprocket has three lugs and is held in place by a circlip (snap ring). The 20 and 23-tooth versions are flat; the 25-tooth version is also available dished.
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* Sturmey-Archer sells cranksets adapted to this hub, with tooth counts in the 30s, and designed to work with a full chain case.
* Sturmey-Archer sells cranksets adapted to this hub, with tooth counts in the 30s, and designed to work with a full chain case.
* These hubs shift with a pulley mechanism concentric with the axle inboard of the frame, and use different shifters from other Sturmey-Archer hubs. The newer (W) versions cleverly allow the pulley mechanism to be installed at different angles, so that only one type or antirotation washers is necessary, regardless of the angle of the dropout slots.
* These hubs shift with a pulley mechanism concentric with the axle inboard of the frame, and use different shifters from other Sturmey-Archer hubs. The newer (W) versions cleverly allow the pulley mechanism to be installed at different angles, so that only one type or antirotation washers is necessary, regardless of the angle of the dropout slots.
;Siehe auch
* [[Alles über Nabenschaltungen#Schmierung|Alles über Nabenschaltungen - Abschnitt über Schmierung]]


== Technische Informationen zu Modellen ab 2009 ==
== Technische Informationen zu Modellen ab 2009 ==
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