stuck pedal

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Brucey
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Joined: 4 Jan 2012, 6:25pm

Re: stuck pedal

Postby Brucey » 23 Sep 2015, 10:06am

any good LBS will have a pedal tap and will run it through your crank for you (from the back, preferably). If I was in the middle of nowhere I'd make a tap from an old spindle as you suggest but otherwise if I didn't have a tap, the LBS would beckon.

FWIW I've used cranks for years that have been missing the first two threads (don't ask how this happened.... :roll: ) and it has been fine.

cheers
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TrekMad
Posts: 373
Joined: 2 Jun 2015, 10:17am

Re: stuck pedal

Postby TrekMad » 23 Sep 2015, 10:17am

Here's a handy video that breaks down pedal tapping and replacing a thread with new for you, but as the guy suggests sometimes it's just easier to replace the crankset....

http://m.youtube.com/#/watch?v=exJtmapUR1c
Last edited by TrekMad on 23 Sep 2015, 11:30am, edited 1 time in total.

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tykeboy2003
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Location: Swadlincote, South Derbyshire

Re: stuck pedal

Postby tykeboy2003 » 23 Sep 2015, 11:27am

Like Brucey, I've got a (left-hand side) alloy crank with the first 2mm of threads well-and-truly mashed up, but with a bit of patience I managed to screw the pedal back in after first screwing it in from the wrong side. It seems to have lasted quite well - although it's on a bike I keep at my sister's in Spain so it hasn't had much use. If it fails I guess I'll have to replace the crank, it's an old bike so I don't mind having unmatched crank arms.....

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horizon
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Location: Cornwall

Re: stuck pedal

Postby horizon » 23 Sep 2015, 3:58pm

TrekMad wrote: but as the guy suggests sometimes it's just easier to replace the crankset....



If cranksets are reasonably cheap and interchangeable then I think that's the best strategy. Even if they're not, it shouldn't happen that often (we learn the hard way). I often go into a job thinking "if the worst comes to the worst I'll bin the pedal, or bin the crank, or bin the crankset, or bin the BB or bin the frame.... that way you're the master whatever the bike says.
When the pestilence strikes from the East, go far and breathe the cold air deeply. Ignore the sage, stay not indoors. Ho Ri Zon 12th Century Chinese philosopher

MartinC
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Location: Bredon

Re: stuck pedal

Postby MartinC » 24 Sep 2015, 10:12am

Slightly OT. I've got s set of old XT cranks (90's) in the garage, the bike they came off is long gone. The pedals in them are seized. I haven't thrown them away 'cos I've half a mind to rescue them. Unfortunately the threads in both are knackered - I can get the axles to turn with some force but thy don't unscrew. Not sure how I can get them out without the major hassle of drilling them out. I'm happy to scrap the pedals (M324) but not the cranks - they're just too nice to throw away. They're almost bound to need thread inserts but the major hassle is finding an easy way to get the pedals out.

Brucey
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Joined: 4 Jan 2012, 6:25pm

Re: stuck pedal

Postby Brucey » 24 Sep 2015, 10:41am

if they turn like that it is usually just a case of applying enough axial load as you turn them to persuade the pedals out. [Probably they are hanging on because there is one intact thread next to the undercut in the pedal thread or something like that.]

One way of doing this is to do the pedal dismantle/grind flats thing, then fit a thick plate with a hole in it over the spindle before it goes into the vice. Then you can fit a small automotive-style puller to the plate, pushing against the back of the pedal spindle as you go.

There may well be other methods that might work, but that is one that I'd try if I were in your shoes.

cheers
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ericonabike
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Joined: 24 Apr 2008, 4:05pm

Re: stuck pedal

Postby ericonabike » 28 Sep 2015, 6:16pm

Final report: friendly LBS took two minutes from his day to run a tap through the crank thread and it is now in full working order. Handy, as the little Dahon Presto Lite it is attached to is now going to fulfil a dual commuting/touring role, involving switching from SPDs to folding MKS pedals on a fairly regular basis. Is now the work of a moment rather than a day or so! Onwards and downwards....
Motorists' mantra: Cyclists must obey the law and the Highway Code AT ALL TIMES. Unless their doing so would HOLD ME UP.