MIddle Drive Gear

Man, what a weekend! Took off from work, drove 220 miles to TN and actually got to trail ride for a total of 15 minutes before this happened:

Ya , Broke parts Sux....

Hey Yellow 660
If that is out of a Rhino I have a copy of the yamaha shop manual I can email you if you need it. If you pm me your email i will send it to you.

That blows. They fix that in the 700s. Now you just break the middle drive shaft. Wow what a fix. Thanks Yamaha

Sorry to hear. That sucks anytime, let alone on a long trip away from home. Not sure what a new one costs, but this billet replacement from Weller will insure it does not happen again.

http://www.wellerracing.com/rhino660.htm

dang that bites ! for all of us that are not mechanically inclined, what happened, what broke, and if possible, why ?
hope you get it back together soon.

Rhino Rob wrote:

dang that bites ! for all of us that are not mechanically inclined, what happened, what broke, and if possible, why ?
hope you get it back together soon.

It's the middle drive gear bearing housing. It is a cast material (needs to be stronger) and when it fails from stress and fatigue, it usually throws metal all thru the motor and sometimes out the side of the motor. It is very rare when it happens to a stock motor. Usually it is with a built one. Most people that build their motors ( especially stroked ones) replace it with a billet aluminum one.

man i hope i never break that drive gear, cause i would have no clue how to change it. id just have to push it off in a pond and call the insurance company

The motor is stock, running 26in Bighorns. This August the Rhino will be 6 years old . When the gear broke it felt just like it had jumped out of gear and made that rattling sound. I immediately knew what happened and turned it off. My Rhino has spent about 99% of its life at Windrock rock crawling the mountain. I got lucky in the fact that the mounting holes for the carrier did not separate or crack which is casted as part of the casing. From what I have read, that usually happens and the case is destroyed. The gear itself is around $230 dollars and the stock bearing housing is about $32. I am now trying to find the best price so I can get it back running. Thanks again guys for the support!

i busted the middle drive gear on my rhino a few years ago. but the bearing housing never broke it was just the gears. i changed the 2 gears (driven and drive gears) with out splitting the cases. i made the tool that is need to remove the middle drive shaft. the 4 bolts that hold the bearing housing on was a pain to get out with out splitting the cases but im sure splitting the cases its harder.the hardest part is shimming the gears right.

Bush...... you are unbelievable!!!! I would not have thought it was possible to change with out splitting to case. You da man!!!!

ronnie was you able to change the shaft without splitting the case. i know you told me but i forgot.

bush wrote:

ronnie was you able to change the shaft without splitting the case. i know you told me but i forgot.

Yes, I did not do it. Someone way smarter then I said it could be done. And they did it. I was ready to pull the engine.