Simplex 303 Adjustment
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Simplex 303 Adjustment
Gear is grinding.
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Last edited by 1989Pre; 04-16-23 at 01:13 PM. Reason: Delete Post option is not available.
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slightly off-topic -
in this image it appears you may have some extra unnecessary friction in the cable path caused by ferrules which are slightly too large to seat in the recesses of the housing stops
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slightly off-topic -
in this image it appears you may have some extra unnecessary friction in the cable path caused by ferrules which are slightly too large to seat in the recesses of the housing stops
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#3
Disraeli Gears
The braze-on on the chain stay may be sized to require a step-down ferrule.
Also, to me it looks like the cable housing between chain stay and derailleur is too short. Compare the image in the "manual" you posted.
Also, to me it looks like the cable housing between chain stay and derailleur is too short. Compare the image in the "manual" you posted.
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Actually I think the original way was not step-down ferrules, just regular single-diameter ferrules but much smaller. Maybe not made anymore (I'm way out of touch with the current offerings) but I have some ancient Simplex housing and ferrules and they're tiny by modern standards.
One reasonable way to git 'er done is to use regular spiral-wound housing with no ferrule, just grind the ends nice and flat and de-burr the holes. Maybe not as finished a look as a proper ferrule, but functionally just fine as long as the diameter matches up so the housing is guided in straight.
Mark B
One reasonable way to git 'er done is to use regular spiral-wound housing with no ferrule, just grind the ends nice and flat and de-burr the holes. Maybe not as finished a look as a proper ferrule, but functionally just fine as long as the diameter matches up so the housing is guided in straight.
Mark B
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Actually I think the original way was not step-down ferrules, just regular single-diameter ferrules but much smaller. Maybe not made anymore (I'm way out of touch with the current offerings) but I have some ancient Simplex housing and ferrules and they're tiny by modern standards.
One reasonable way to git 'er done is to use regular spiral-wound housing with no ferrule, just grind the ends nice and flat and de-burr the holes. Maybe not as finished a look as a proper ferrule, but functionally just fine as long as the diameter matches up so the housing is guided in straight.
Mark B
One reasonable way to git 'er done is to use regular spiral-wound housing with no ferrule, just grind the ends nice and flat and de-burr the holes. Maybe not as finished a look as a proper ferrule, but functionally just fine as long as the diameter matches up so the housing is guided in straight.
Mark B
With the ferrules removed, the housing might seat sufficiently better so as to make good with that actual piece of housing.
But having a correct step-down ferrule at the chainstay stop might really improve the cable path if it holds the housing in line with the cable.
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This thread was worth reading just for this one piece of advertisement. Love where it ends: "what is a touring gear?" The term is "meaningless" except that it describes a "gear" used by Cyclists "who want to go places."
It's hard to say it much better than that.
It's hard to say it much better than that.
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Regarding the grinding noise, I have no experience with this Simplex but it seems to me that chain line would be exceptionally critical with a long pulley arm that is oriented like this, almost pointing at the chainrings. The chain will want to drag the lower pulley sideways until the pulley arm is pointing at the chainring.
My experience with the shorter arm pull-chain Simplex derailleurs is that they are quite finicky about chainline, optimized perhaps for 4 speed freewheels.
Brent
My experience with the shorter arm pull-chain Simplex derailleurs is that they are quite finicky about chainline, optimized perhaps for 4 speed freewheels.
Brent
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Yeah, that's about a simple and obvious as you can get. Maybe they got school-kids to write these.
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Unless you climb the rungs strategically, you’re not going to build the muscle you need to stay at the top.
Unless you climb the rungs strategically, you’re not going to build the muscle you need to stay at the top.
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There is no cable binding. The ferrules have no bearing on the chain chatter.
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Unless you climb the rungs strategically, you’re not going to build the muscle you need to stay at the top.
Unless you climb the rungs strategically, you’re not going to build the muscle you need to stay at the top.
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Regarding the grinding noise, I have no experience with this Simplex but it seems to me that chain line would be exceptionally critical with a long pulley arm that is oriented like this, almost pointing at the chainrings. The chain will want to drag the lower pulley sideways until the pulley arm is pointing at the chainring.
My experience with the shorter arm pull-chain Simplex derailleurs is that they are quite finicky about chainline, optimized perhaps for 4 speed freewheels.
Brent
My experience with the shorter arm pull-chain Simplex derailleurs is that they are quite finicky about chainline, optimized perhaps for 4 speed freewheels.
Brent
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Unless you climb the rungs strategically, you’re not going to build the muscle you need to stay at the top.
Unless you climb the rungs strategically, you’re not going to build the muscle you need to stay at the top.
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After dealing with this enigma, I am "slightly-off-rocker".
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Unless you climb the rungs strategically, you’re not going to build the muscle you need to stay at the top.
Unless you climb the rungs strategically, you’re not going to build the muscle you need to stay at the top.
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Brent
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This is only a hunch, not based on any real experience: When the chain is on the largest sprocket the pulley cage is going to be at it's most horizontal angle. It might be worth trying to add as many links to the chain as the difference in tooth count between largest and second-largest sprocket. This will lower the angle of the pulley cage and just maybe solve your problem.
Brent
Brent
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Unless you climb the rungs strategically, you’re not going to build the muscle you need to stay at the top.
Unless you climb the rungs strategically, you’re not going to build the muscle you need to stay at the top.