Front Derailleur not adjusting properly - help.
shouldbeinbed
Posts: 2,660
I admit I'm a bit out of practice - had hub gears with no front mech for quite a while now.
I'm setting up my sons 3 ring front mech on his cheapo racer (btwin sport 1 - shimano bog standard mech)
I've cleaned and lubed it and checked the cable for wear and kinks but fine adjusting it is driving me daft. Its a bottom pull mech, I've adjusted the high and low limiters properly and it shifts up adequately - can catch going into the outermost chainring if you don't back off for a pedal rev, but in shifting down whatever I do to the cable tension, it is leaping over the middle ring straight from outer to inner. Too much cable tension or fiddling with the H&L settings stops it shifting over all 3 rings and there seems to be a minimal window that I've not yet found despite 1/8 turns of the adjuster barrel between too tight a cable to shift properly and so loose that the chain leaps sraight from top cog to bottom.
its nights like last night that remind me why I hate derailleurs so much.
I'm setting up my sons 3 ring front mech on his cheapo racer (btwin sport 1 - shimano bog standard mech)
I've cleaned and lubed it and checked the cable for wear and kinks but fine adjusting it is driving me daft. Its a bottom pull mech, I've adjusted the high and low limiters properly and it shifts up adequately - can catch going into the outermost chainring if you don't back off for a pedal rev, but in shifting down whatever I do to the cable tension, it is leaping over the middle ring straight from outer to inner. Too much cable tension or fiddling with the H&L settings stops it shifting over all 3 rings and there seems to be a minimal window that I've not yet found despite 1/8 turns of the adjuster barrel between too tight a cable to shift properly and so loose that the chain leaps sraight from top cog to bottom.
its nights like last night that remind me why I hate derailleurs so much.
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Comments
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Is the cable routed correctly into the clamp?0
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Have you taken the cable out completely?Sometimes you can get a kink in the shifter which will prevent proper shifting.
How old is the bike and was it ok from new?
If the answer to the above is less than 2 years and yes then take it back for the workshop to look at.
If its from the Stockport store feel free to pop in and I'll look at it for you (I'm the workshop manager)0 -
Wappygixer wrote:Have you taken the cable out completely?Sometimes you can get a kink in the shifter which will prevent proper shifting.
How old is the bike and was it ok from new?
If the answer to the above is less than 2 years and yes then take it back for the workshop to look at.
If its from the Stockport store feel free to pop in and I'll look at it for you (I'm the workshop manager)
yes it was from Stockport middle of last year, It's done Oldham to Ashton sometimes via the mucky route during the autumn and winter. I'll bring it in at the weekend, thanks for the offer, its much appreciated.
I'd not taken the cable out completely, but in a little additional fettling (still not right) it could well be kinked, the barrel adjustor is a bit erratic and elliptical in its movement.
I'll quiz the boy again and see if its had more of a knock than he's let on.0
