Page 1 of 2
all metal worm drive ( problem)
Posted: Wed Aug 10, 2011 7:35 am
by jamjo
hello , dont know if any one has any advice on this . my mates worm drive set up was really worn so decided to fit a new all metal one from dealer. we followed stickys book and ground off the old nylon drive and then the thin metal sleeve which was on there as well . the metal one was a loose fit so we have loctited it to the splindle . the problem is when we have put it all back to together and put in the shaft part of the worm drive ( sorry dont know the real name) when turning the weel it just jambs up ant wont go round . has any one any advice on what we have done wrong . ha wants to sort it for the iow and is running in an engine so want it working to keep track of milage and speed
thanks if you can understand this post and can help with advice
regards james
Re: all metal worm drive ( problem)
Posted: Wed Aug 10, 2011 8:25 am
by eibargum
Is this on a ScootRS disc by any chance.
Re: all metal worm drive ( problem)
Posted: Wed Aug 10, 2011 8:55 am
by soosh
I had this problem but just thought i damaged it but couldn't see where,I put standard nylon one on in the end which works fine and will do for years.
Re: all metal worm drive ( problem)
Posted: Wed Aug 10, 2011 10:15 am
by carlos fandango
have you tried loosening the brass retaining nut thingy ? The part that the speedo cable attaches to ? This sometimes traps the speedo drive if its slightly to big ?
Russ
Re: all metal worm drive ( problem)
Posted: Wed Aug 10, 2011 10:25 am
by soulsurfer
I've not had any problems with the MB ones, but sometimes they need a washer at the end of the worm drive spindle, I always lap them in with grinding paste too.
Re: all metal worm drive ( problem)
Posted: Wed Aug 10, 2011 12:39 pm
by byron
I fitted a new metal hub drive & worm to an original Italian disc recently, needed a fair amount of fettling for the two to mesh without sticking, which is bit of a chore, dismantling it, taking a bit off where necessary, reassembling it, several times over...
It does work fine now though.
I think I did end up using a washer on the end of the worm drive as suggested above.
I did need to loctite the drive to the hub.
I have used a nylon hub part with a metal worm in mine for 000s of miles, I think the nylon is more forgiving if the two don't match up so well... [ie it gets chewed up a bit, and finds its place...]
Re: all metal worm drive ( problem)
Posted: Wed Aug 10, 2011 5:35 pm
by soosh
Still sh1t for new parts though,bet the supplier never said you had to use a washer when you ordered it.
Re: all metal worm drive ( problem)
Posted: Wed Aug 10, 2011 5:53 pm
by soulsurfer
Re: all metal worm drive ( problem)
Posted: Thu Aug 11, 2011 8:29 am
by soosh
Your lucky,mine didnt.
Re: all metal worm drive ( problem)
Posted: Thu Aug 11, 2011 2:58 pm
by handofdave
soosh wrote:Still sh1t for new parts though,bet the supplier never said you had to use a washer when you ordered it.
thats typical with most parts though