Chinese ATV wheel bearing and seal change front hubs Mar 13, 2014 21:47:02 GMT -5
Post by atvsunlspokane on Mar 13, 2014 21:47:02 GMT -5
I recently had some front wheel bearings go bad on my 200cc ATV's. Both have drum brakes with straight cable pulls. I used a grade 8 ---5" long bolt with the threads taped up good to remove the old bearings, they came right out using a 3lb sledge! I went to a local bearing and seal distributer and got new bearings and seals for less then half the price of the Shops. I also got a piece of round Aluminum stock to tap the new bearings in from a scrap yard. Using a steal socket or anything steel can bugger up the bearings. After installing the first bearing I packed the inside of the hub with alot of fresh greese( Walmart type), then installed the long inner sleeve. I used a bolt with alot of packing around it and tape to align the sleeve,before installing the second bearing.( I put it thru the first bearing and up through the sleeve and slid the next bearing over that). Now I placed the second bearing over the alignment rod I made and tapped it into place. Now I removed the homemade alignment tool and put a nice chuck of grease on the one side on the bearing and gently tapped the grease seal into place. Now replace the seal on the other part of the hub that holds the brake pad assembly. Be sure to pack the little void with grease, making sure you don't make a mess and keeping the brake pads clean. Now put the two hub pieces together and slide over the greased spindle assembly. Once it is on as far as your hands can press it, gently tap a little more with a cheap rubber malet. Now install the small outter sleeveinto the grease seal before putting your crown nut on. Now alot of Chinese ATV's only came with a small lock washer between the sleeve and the crown nut. Replace that small locking washer with a larger diameter(1 1/2 inch) steal washer. It doesn't have to be a lock washer,and there doesn't have to be a lock washer here,I will explain. But the larger washer will keep the hub on the spindle in case there is a catistrophic failure of the bearings. So install the larger washer over the small sleeve. Now hand tighten the crown bolt down to the washer just snug no more. Now turn the crown bolt a little more just enough to align the cotter pin holt, NO MORE!! (Besure to use a small amount of blue lock tite solution). Now install a steal cotter pin. As you remember the inside of the hubs where the bearings were were dry. My bearing expert at Brown Bearing and of course Allen Moto shop said it is best to add grease to all the areas I mentioned, it can't hurt and will not allow water into the bearing area,which causes the most bearing failures with wheel bearings.