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Technical & Reference Section => Tech and Restoration => Topic started by: crusty on April 21, 2008, 09:38 PM

Title: fitting twin pinch flights
Post by: crusty on April 21, 2008, 09:38 PM

have put bearings in slotted axle in place put arms on with washers in place and tightened up but arms won't spin freely
what have i done wrong must admit i didn't put the collar/shim/sheef over the axle between the bearings but i don't see how this would affect the spinning
but i'm no expert
which is why i'm asking you guys

Title: Re: fitting twin pinch flights
Post by: MartyC on April 21, 2008, 09:56 PM

If the arms are pulling in on the bearings then yes not having the shim on the axle will cause them to stop spinning as you have effectively squeezed the bearings together  :-\.  Back them off a touch and retighten the pinch bolts and see if that makes a difference  :daumenhoch:.

Title: Re: fitting twin pinch flights
Post by: crusty on April 21, 2008, 11:14 PM

cheers bud sounds like i need to put the shim in i'm a cock
the bearings where a C nut to put in as well
serves me right for trying to do something while talking,eating and drinking

Title: Re: fitting twin pinch flights
Post by: eloopnai on April 21, 2008, 11:19 PM

are these new flights?
 i have just fitted a new set and forgot the shim but all seems ok took her for a spin and all ok fook taking em apart and fitting it now !

Title: Re: fitting twin pinch flights
Post by: crusty on April 22, 2008, 07:46 AM

i'll try loosening them first
thanks

Title: Re: fitting twin pinch flights
Post by: bridgecity on April 22, 2008, 07:12 PM

Here are steps for installing the cranks:

http://www.bmxmuseum.com/forums/viewtopic.php?id=30010