GNG jackshaft freewheel broken. EDIT:Rebuilt and repaired it

Hi,
something happened to my freewheel - if motor turns, its center part turns with shaft but sprocket is not turning under load. It turns when rear wheel is lifted from ground.
Has anyone had similar problem? It started to slip when started from stop (did not give much throttle, was gentle start)
Is it fixable or where I can get replacement?

Meelis

http://www.ebay.de/itm/E-bike-mid-d...Cassettes_Freewheels_Cogs&hash=item3f27c62f98
This look's like the original but without the adapter.

You can get in touch with Jon from GNG for a direct replacement.

there are also adapters you can use for M30x1.0 freewheels. Of course you'd have to use a 13T freewheel and add a half link to your chain.

http://endless-sphere.com/forums/viewtopic.php?f=28&t=42785&p=748459#p748459

Seems that I got it fixed. Center part (freewheel adapter?) was welded to freewheel but welding broke - so it turned around inside of freewheel but did not come out because of welding edge.

Be carefull to lock the last ring when assembling. It want's to unscrew. Maybe locktite and a spotweld.
(got the spotweld on mine and it holds up fine for 100v 45amps, also the metal in the coggs must be of a nice quality beacuse there is almost no wear after 5 months of daily riding.
)

christerljung said:

Be carefull to lock the last ring when assembling. It want's to unscrew. Maybe locktite and a spotweld.
(got the spotweld on mine and it holds up fine for 100v 45amps, also the metal in the coggs must be of a nice quality beacuse there is almost no wear after 5 months of daily riding.
)

Click to expand...

Yes I used superglue to fix it. I saw your post in GNG thread and that was reason to use glue just in case

I would fill the crack with green loctite. It will keep it from rocking around and lock the pins also. Put a touch on the threads also. It will seep in and fill the crack with a hard plastic type material. Don't get it in the bearings.

speedmd said:

I would fill the crack with green loctite. It will keep it from rocking around and lock the pins also. Put a touch on the threads also. It will seep in and fill the crack with a hard plastic type material. Don't get it in the bearings.

Click to expand...

Yes I locked pins with superglue. Descriptions are under each picture.

meelis11 said:

speedmd said:

I would fill the crack with green loctite. It will keep it from rocking around and lock the pins also. Put a touch on the threads also. It will seep in and fill the crack with a hard plastic type material. Don't get it in the bearings.

Click to expand...

Yes I locked pins with superglue. Descriptions are under each picture.

Click to expand...

Click to expand...

Loctite and super glue are not the same thing. The loctite will seep into tiny voids and harden once it can no longer breath. Your crack most likely happened because of the void between the hub and freewheel behind the weld causing it to flex while rotating under load. Green loctite will fill this void and any other of up to .03 inches with good hard plastic adhesive type material. Super glues are good if the gaps are tight and you can assure you filled them. No comparison when filling porosities or this type of weld failure.

If it develops play, get your self some green #290, before it leaves you stranded again.