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Post by AnEv942 on Jun 4, 2012 13:33:23 GMT -5
Hello-been a while- having issues and this forum was my 1st response.
I searched around found questions but no answeres. Hoped something in tech but didnt see. Anyway just returned home from a trip. While out noted when applying rear brake bike was loping. When I got home washed the bike, remembered the loping and started looking. I happend to grab rear wheel and its flopping side to side on the shaft quite freely about 1/4 at rim edge.
I dont recall any how tos on checking or replaceing what might be wore. I assum a bearing(s) on the shaft (arm or nothing else moves) but I dont want to start tearing down without some idea. both on dissasembly and parts involved. Any pointers or where I might find info?
This is on a generic chineese scoot (Longbo LB50qt-23) 49cc single side mount swing arm, rear drum 10" wheel
Thanks Mark
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Post by Fox on Jun 4, 2012 13:39:36 GMT -5
The main nut that holds the wheel on the engine is probably loose. You may need to remove the exhaust to tighten it. Then get a friend to sit on the scooter and apply both the front and rear brakes while you tighten it with a socket.
Some Loctite on the threads wouldn't be a bad idea. If you have access to an impact wrench then by all means use that.
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Post by AnEv942 on Jun 4, 2012 13:50:58 GMT -5
Well I'm pretty sure I can access the nut with out removing exhaust, though to remove wheel at min Id need to drop exhaust. I noted nut but didnt think to check that it was tight. It did (wobble) become apperant rather quickly so Ill check it, possibly thats it.
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Post by AnEv942 on Jun 4, 2012 14:11:03 GMT -5
OMG
So I put a socket on the nut-wiggle to ensure it was seated-tried to rotate to ensure grabbing hex and the friggin nut just spun off with my hand. I tightend just holding torque wrench and spinng wheel just to check if that would fix-soon as nut started getting hard to hold wobble gone, so that is it. I removed the nut-going to clean and locktight at min.
With the nut removed looking at wheel it seems the bearings are on the shaft? not part of wheel. the wheel is splined and slides over spline on shaft , what ever is spining (bearings) appera ok no movment in axle shaft. Bizzare...do these tend to back off? Crap another tool I need to carry. Seems thers should at least be a cotter key wow
Thanks
Mark
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Post by Fox on Jun 4, 2012 14:43:07 GMT -5
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Post by AnEv942 on Jun 4, 2012 16:11:01 GMT -5
Pulled wheel to clean , quite clear once its apart. Clean drum, wheel & threads. noted where nut butts against wheel only contacts a thin rim around shoulder openeing (at "a") because the area in center at spline is concave. Seems, there wasnt, should be a washer?? I also noted a star shaped indent (at"b") could be the spline is an insert into the wheel? or was imprint from previously removed washer.  Almost tempted to put the nut on backwards cause its outer side is convex--but its the thread torque area. Do you folks add a washer or is there usually one? Theres no way the contact area of nut is going to stay tight with such a small contact with wheel? Plus its just grinding off the shoulder of wheel recess...unless someone has an idea why not Im looking for a washer? Thanks Fox next time im at HF ill look at the impacts- Mark Edit well Im off to the store no way OD of std washer large enough to fit over shaft will set inside whell-see if I can find a washer or nut with flange |
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Post by Fox on Jun 4, 2012 19:01:48 GMT -5
I just happen to have one of those flanged bolts here. I just took it off of an old 50cc engine I have out in the shop. $1 + shipping. If you want it shoot me a zip code and how soon you want it and I'll get you a total. Small 3 day priority flat rate box is $5.35  At my local HF those 12 volt impacts are displayed in a separate section from the power tools. They are really designed to remove a car wheel on the highway. They have a led light on the front for working at night. Not the most powerful thing but the price is right and they get the job done. It sometimes takes a lot of whacks to loosen a stubborn nut but I've never had a nut too tight for it. The only issue is the sockets are weak and cracked on me after a while so I went out and got some good quality sockets. 17mm, 14mm and a 15/16in. for the rear wheel. |
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