Vediamo se vi è capitato. Sulla hoy hoy rats della cinelli il deragliatore una volta azionato a scalare porta la catena direttamente dalla corona grande alla piccola saltando la centrale. A salire invece no. Il comando sinistro è molto duro. Il si vende della situazione sostiene che necessita di uso che ci deve essere qualcosa di grippato. Altro problema il comando prevede 4 scatti, ma arriva a stento al terzo.
Ho cercato su internet è ho trovato chi parla dello stesso problema, ma non ho capito. Qualcuno capisce i termini tecnici in inglese?
landru
Hello,
I wonder if anyone can give me some advice on a Shimano SL-R440 front shifter problem.
The shifter in question has worked flawlessly for the last three years with a Tiagra 9 speed FD. However, after replacing the FD cable recently, I have been unable to get the FD working properly.
The problem is that with the cable tensioned nicely, the FD drops from the big ring to the smallest ring in one click of the front shifter. Not good. If I loosen off the cable slightly, I can achieve proper shifting between the small and middle rings, but get massive rubbing on the FD when the chain is on the big ring. No, I'm not cross-chaining here. In this state, there just isn't enough cable tension to pull the FD to its outer limit.
So what gives? Why can't I get the shifter to operate the way it used to?
Thinking that worn pawls inside the shifter mechanism might be the issue, I disassembled the shifter but could find no obvious signs of wear.
Any ideas? Am I battling a worn-out mechanism or is the problem something else?
(Yes, I know that the SLR-440 is a four position shifter and I'm attempting to set it up as such.)
Regards,
Andrew
AnthonyG
I've got those same flat bar shifters and there 6 position not 4 and I've found them to be VERY finicky to setup. Currently the best setup I can get is using 5 positions. Two for the granny, two for the middle and one for the big ring.
Regards, Anthony
maddmaxx
I have seen front derailleurs in this setup that have a shallow cable groove on the end of the cable pull arm. If this is so, the cable goes over the end of the arm and then under the screw instead of directly to the screw. This will make a significant difference in the ratio of the derailleur.
landru
Hey Antony and maddmaxx,
Thanks for the replies.
It's very curious that your shifter is 6 position, Anthony. After taking mine completely apart (including the guts), I saw that's there's defintely only 4 teeth for the pawls to engage with. Perhaps Shimano produced different types of shifter under the same model number? Or maybe I misunderstand how these things work.
Madd, I'll have a closer look at the derailleur as you suggested. That idea sounds promising.
Just as a footnote, I discovered that it's quite easy to adjust the tesion on the shifter mechanism by loosening or tightening the nut on the spindle of the mechanism. The nut is accessible from the little cover plate which screws to the thumb lever. I snugged up the tension and was rewarded with a smoother shifting action. Still the same original problem, however.
Thanks to you both.
Regards,
Andrew
rmfnla
The interesting thing is that it ever worked at all. Those shifters are designed to work with the R-443 front derailleur, not the Tiagra. Check this out...
http://www.speedgoat.com/product.asp?part=108341&cat=130&brand=226
The Tiagra's stock # is FD-4403, which is obviously very similar to the R-443. I have seen several bike shops confuse these two parts but they are not intended to be interchangable.
landru
My mistake, rmfnla: my FD is in fact the R-443, and not the Tiagra as I had initially stated. The derailleur shown in the link you posted is the one on my bike. Thank you for that link and the good info.
But wait, there's more good news: maddmaxx's diagnosis was absolutely correct. After running the cable over top of the derailleur cable pull arm, the derailleur/shifter now stop properly in all four positions. However, I still need to tinker with the cable tension and shifter tension to get the system running as smoothly as I'd like. It is indeed quite finicky.
Thanks, maddmaxx. You had the solution that escaped two local bike shops, including the one that sold me the bike.
Regards,
Andrew
Ho cercato su internet è ho trovato chi parla dello stesso problema, ma non ho capito. Qualcuno capisce i termini tecnici in inglese?
landru
Hello,
I wonder if anyone can give me some advice on a Shimano SL-R440 front shifter problem.
The shifter in question has worked flawlessly for the last three years with a Tiagra 9 speed FD. However, after replacing the FD cable recently, I have been unable to get the FD working properly.
The problem is that with the cable tensioned nicely, the FD drops from the big ring to the smallest ring in one click of the front shifter. Not good. If I loosen off the cable slightly, I can achieve proper shifting between the small and middle rings, but get massive rubbing on the FD when the chain is on the big ring. No, I'm not cross-chaining here. In this state, there just isn't enough cable tension to pull the FD to its outer limit.
So what gives? Why can't I get the shifter to operate the way it used to?
Thinking that worn pawls inside the shifter mechanism might be the issue, I disassembled the shifter but could find no obvious signs of wear.
Any ideas? Am I battling a worn-out mechanism or is the problem something else?
(Yes, I know that the SLR-440 is a four position shifter and I'm attempting to set it up as such.)
Regards,
Andrew
AnthonyG
I've got those same flat bar shifters and there 6 position not 4 and I've found them to be VERY finicky to setup. Currently the best setup I can get is using 5 positions. Two for the granny, two for the middle and one for the big ring.
Regards, Anthony
maddmaxx
I have seen front derailleurs in this setup that have a shallow cable groove on the end of the cable pull arm. If this is so, the cable goes over the end of the arm and then under the screw instead of directly to the screw. This will make a significant difference in the ratio of the derailleur.
landru
Hey Antony and maddmaxx,
Thanks for the replies.
It's very curious that your shifter is 6 position, Anthony. After taking mine completely apart (including the guts), I saw that's there's defintely only 4 teeth for the pawls to engage with. Perhaps Shimano produced different types of shifter under the same model number? Or maybe I misunderstand how these things work.
Madd, I'll have a closer look at the derailleur as you suggested. That idea sounds promising.
Just as a footnote, I discovered that it's quite easy to adjust the tesion on the shifter mechanism by loosening or tightening the nut on the spindle of the mechanism. The nut is accessible from the little cover plate which screws to the thumb lever. I snugged up the tension and was rewarded with a smoother shifting action. Still the same original problem, however.
Thanks to you both.
Regards,
Andrew
rmfnla
The interesting thing is that it ever worked at all. Those shifters are designed to work with the R-443 front derailleur, not the Tiagra. Check this out...
http://www.speedgoat.com/product.asp?part=108341&cat=130&brand=226
The Tiagra's stock # is FD-4403, which is obviously very similar to the R-443. I have seen several bike shops confuse these two parts but they are not intended to be interchangable.
landru
My mistake, rmfnla: my FD is in fact the R-443, and not the Tiagra as I had initially stated. The derailleur shown in the link you posted is the one on my bike. Thank you for that link and the good info.
But wait, there's more good news: maddmaxx's diagnosis was absolutely correct. After running the cable over top of the derailleur cable pull arm, the derailleur/shifter now stop properly in all four positions. However, I still need to tinker with the cable tension and shifter tension to get the system running as smoothly as I'd like. It is indeed quite finicky.
Thanks, maddmaxx. You had the solution that escaped two local bike shops, including the one that sold me the bike.
Regards,
Andrew