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V1 mirage drive help
http://www.hobie.com/au/en/forums/viewtopic.php?f=11&t=57149		 Page 1 of 1
Author:  BILLDUDE [ Sun Mar 20, 2016 2:13 pm ]
Post subject:  V1 mirage drive help
So last summer decided to give my drive an overhaul. Lots of wear. Wanted to keep it cheap. Replaced sprockets..teeth missing. Idler pulley was cracked...replaced. When I tightened down the nut that holds the shaft for the sprockets, it cracked...great. Temporarily, I drilled a small hole in the spine and tie-wired it.
Odered new spine, drums, sprocket shaft and idler pulley shaft last summer. So, last night, 6 months later, I started to put it together...realized they sent the wrong spine! Also, the shaft, that clicks in, won't go thru the spine..wrong size? Tried to see if the V1 drums would slide on this shaft...nope. Not sure what to do except start drinking.
Anybody?
Author:  mmiller [ Mon Mar 21, 2016 10:17 am ]
Post subject:  Re: V1 mirage drive help
That is the only available spine. Trim off the alignment pins.

We have not changed the diameter of the sprocket or idler shafts. We added splines to the drum shaft to tighten the fit in the spine. It is possible the spine hole for this shaft is tighter.

Other than that I have not heard any conversion issues.
Author:  Roadrunner [ Mon Mar 21, 2016 11:59 am ]
Post subject:  Re: V1 mirage drive help
There are 3 shafts -- sprocket, drum and idler. Which one doesn't fit? The sprocket and idler shafts should slide in pretty easily. The (new) drum shaft (If you got one) is tapped in with a maillot -- tight fit needed so the shaft does not rotate or drift (the splines on the shaft cut right into the spine to lock themselves in). Be sure to not over tighten the Allenhead screws that lock the idler and sprocket shafts into place or you can crack your new spine (common error). Instead, use Locktite Blue thread locker to keep those Allenheads from backing out (don't skip this step)!

You may have also noticed the "wing" on your new spine. Some older drivewells are slightly smaller than the newer versions and it may be necessary to trim (file) that wing so that it fits in your drivewell (rarely necessary). The plastic alignment pins you will be cutting off, that Mat referred to, protrude from the wing at the midpoint. 8)
Author:  BILLDUDE [ Mon Mar 21, 2016 4:37 pm ]
Post subject:  Re: V1 mirage drive help
Roadrunner wrote:
There are 3 shafts -- sprocket, drum and idler. Which one doesn't fit? The sprocket and idler shafts should slide in pretty easily. The (new) drum shaft (If you got one) is tapped in with a maillot -- tight fit needed so the shaft does not rotate or drift (the splines on the shaft cut right into the spine to lock themselves in). Be sure to not over tighten the Allenhead screws that lock the idler and sprocket shafts into place or you can crack your new spine (common error). Instead, use Locktite Blue thread locker to keep those Allenheads from backing out (don't skip this step)!

You may have also noticed the "wing" on your new spine. Some older drivewells are slightly smaller than the newer versions and it may be necessary to trim (file) that wing so that it fits in your drivewell (rarely necessary). The plastic alignment pins you will be cutting off, that Mat referred to, protrude from the wing at the midpoint. 8)

Its the drum shaft. My first revo was a "cam lock " version. The hull cracked and got a new hull with "Click in" drive. Had to have a different drum shaft to put in my mirage drive to work with the newer "click in". Everything worked fine.
So, what your telling me, mallet the shaft into the spine...no problem. But shouldn't the drums slide on or do I have mallet them on as well? This is the same shaft I've had. ..it's worn but is it tapered ? Will it spin freely if I force them on?
Thanks for your help.
Author:  Roadrunner [ Mon Mar 21, 2016 5:19 pm ]
Post subject:  Re: V1 mirage drive help
You should be using the new splined drumshaft with your Click N Go. Yes, mallet it on and center it careful. If your current drumshaft is already splined you can re-use it. If you see that it is worn slightly, you can rotate it 180 degrees to use the unworn side (if heavily worn I would replace it while everything is off. It's not critical, but provides a better wear surface for your new drums.

Your new drums should be greased (as should all parts spinning on all 3 shafts) with a good marine axle grease. These drums should slide right over the drumshaft with virtually no friction but will be a snug fit. You should not have to force them at all. If you have the newest roller bearing drums (AKA GT drive) the assembly procedure may be slightly different but I assume that is not the case. This is easy to distinguish -- all the new GT parts are light gray. 8)
Author:  BILLDUDE [ Mon Mar 21, 2016 5:47 pm ]
Post subject:  Re: V1 mirage drive help
Roadrunner wrote:
You should be using the new splined drumshaft with your Click N Go. Yes, mallet it on and center it careful. If your current drumshaft is already splined you can re-use it. If you see that it is worn slightly, you can rotate it 180 degrees to use the unworn side (if heavily worn I would replace it while everything is off. It's not critical, but provides a better wear surface for your new drums.

Your new drums should be greased (as should all parts spinning on all 3 shafts) with a good marine axle grease. These drums should slide right over the drumshaft with virtually no friction but will be a snug fit. You should not have to force them at all. If you have the newest roller bearing drums (AKA GT drive) the assembly procedure may be slightly different but I assume that is not the case. This is easy to distinguish -- all the new GT parts are light gray. 8)

My old drum shaft is splined and I'll rotate 180.
But I'm still stuck with the drum problem..,there's no way these are going to slide over. They are brand new v1 drums(bought from ACK).I might be able to hammer them on but if the shaft isn't feathered where they'll sit on the shaft, they won't move.
Somethings not right...either it's the shaft(minor changes in evolution) or the drum (various sizes, bad batch)?
Author:  Roadrunner [ Mon Mar 21, 2016 6:53 pm ]
Post subject:  Re: V1 mirage drive help
That's a problem I haven't seen before. The drums have to run smoothly and with minimal friction for your Drive to function properly. Those V-1 drums are very old by now, even the "new" ones. Apparently your old drums fit fine on your drumshaft, so it makes sense that your problem is with the replacement V-1 drums.

My recommendation is to call ACK and get permission to return the drums, upgrade to the V-2 drums cables and masts if feasible (there were upgrade kits at a reduced cost). This will be an extra expense, especially the new cables, but the benefits are substantial in terms of durability and reliability.

If you have no other good option, you can re-use your old drums. Reverse them (right to left, etc) to correct a worn pedal adjustment pin-hole (for instance the old pin hole #2 becomes the new hole #6), order some new decals for the drum pin #s. This will also improve the drum bearing surface somewhat. It won't hurt anything. When you mount your fins, make sure your masts are snug and the locking Allenheads are also snug -- lock them in with Locktite as appropriate to keep them from backing out and releasing your masts. If your mast shafts are letting your masts wobble, you can epoxy the whole mess together to extend their life while you save up for your new V-2s. There is always a way! :wink:
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