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Wartung von Sturmey-Archer Vier-, Fünf- und Sieben-Gang-Naben: Unterschied zwischen den Versionen
Wartung von Sturmey-Archer Vier-, Fünf- und Sieben-Gang-Naben (Quelltext anzeigen)
Version vom 15. September 2016, 07:41 Uhr
, 15. September 2016→Über die FW und S5: Bild hinzu
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(→Über die FW und S5: Bild hinzu) |
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The original 5-speed hubs used a bellcrank to push a rod inward to accomplish the sun-pinion shift. | The original 5-speed hubs used a bellcrank to push a rod inward to accomplish the sun-pinion shift. | ||
[[Datei:Bellcrank pushrod.JPG|center]] | |||
<center>''Der beste Typ eines Sturmey-Archer [[Umlenkhebel]]s mit einer 2 7/16 Zoll [[Stößelstange]]''</center> | |||
The S5 was sold with three different types of bellcrank, reminiscent of the story of the Three Little Pigs. One type of bellcrank was made partly of plastic and failed quickly. A second type used a flimsy steel stamping, and bent easily. Only the sturdy, forged type with internal threads is reliable, but it is rare. I've had some success modifying Shimano bellcranks to fit. I did this by re-threading them to fit the Sturmey-Archer axle. Taps for this purpose are not readily available, so I made a tap out of an old axle. | The S5 was sold with three different types of bellcrank, reminiscent of the story of the Three Little Pigs. One type of bellcrank was made partly of plastic and failed quickly. A second type used a flimsy steel stamping, and bent easily. Only the sturdy, forged type with internal threads is reliable, but it is rare. I've had some success modifying Shimano bellcranks to fit. I did this by re-threading them to fit the Sturmey-Archer axle. Taps for this purpose are not readily available, so I made a tap out of an old axle. | ||
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Unlike recent hubs -- and like the old version of the AW 3-speed -- all of the 4-speed and 5-speed hubs in this series could "walk" out of high gear position into the intermediate (neutral) gear during a hard sprint -- see comments by Jobst Brandt. The more common cause of gear disengagement, though, was misadjustment of a shifter cable. With these hubs, there is a "neutral" gear between engagement of the sun gears as well as the one between middle and top ranges. | Unlike recent hubs -- and like the old version of the AW 3-speed -- all of the 4-speed and 5-speed hubs in this series could "walk" out of high gear position into the intermediate (neutral) gear during a hard sprint -- see comments by Jobst Brandt. The more common cause of gear disengagement, though, was misadjustment of a shifter cable. With these hubs, there is a "neutral" gear between engagement of the sun gears as well as the one between middle and top ranges. | ||
==Fünffach Naben mit Zwei Zügen== | ==Fünffach Naben mit Zwei Zügen== | ||