Flat spots on greaseless rollers - Yamaha Rhino Forum - Rhino Forums.net
CVT, Sheaves and Wet Clutch A place to discuss troubleshooting and modifications.

 1Likes
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 21 (permalink) Old 06-18-2017, 07:05 AM Thread Starter
Slow Poke
 
Join Date: Nov 2016
Location: Richmond Utah
Posts: 33
Flat spots on greaseless rollers

Hello everyone.

I was having issues with my Rhino being really sluggish from a start. I suspected that the CVT wasn't shifting all the way down. Sure enough the belt was about 1/4" below the top of the secondary vs 1/8" or so above. After disassembling the primary I found that 3 of the greasless roller weights had flats on them. One was very bad and had flats in 3 spots.

I had this problem back in December with the same style weights but then about 6 of the rollers had flats but they were all minor. Tinken suggested filing the cam sliders and that seemed to help until now.

I have been running with the outer cover off for cooling but wonder if that's letting too much dust in. I'm going to put the cover back on but does anyone have any other suggestions for me to try?

Thanks,

Jason
Attached Thumbnails
Click image for larger version

Name:	Roller Velocity Weights With Flats.jpg
Views:	34
Size:	2.01 MB
ID:	47689   Click image for larger version

Name:	Roller Velocity Weights June 2017.jpg
Views:	30
Size:	2.01 MB
ID:	47697  
goosehunter312 is offline  
Sponsored Links
Advertisement
 
post #2 of 21 (permalink) Old 06-18-2017, 07:43 AM
Site Supporter
 
CamShaw's Avatar
 
Join Date: Jan 2007
Location: garden grove, ca
Posts: 7,756
we fire up the car when we get home and spray out the clutches with superclean and a high pressure nozzle on our hose after each ride prior to servicing the rhino for the next ride, if you're in mud all the time then add the cover...we ride the deserts down here and have had zero issues with his rollers and or flatspotting...even though the clutch is running alot cooler, you still need to wash out the primary clutch....mud and small gravel can ruin anything

07 rhino,camo,bilsteins,camshaw 727,HSR carb,custom clutching,camshaw spindles,custom cage,bed delete,all go fast rzr eater! 714 883 6171
CamShaw is offline  
post #3 of 21 (permalink) Old 06-18-2017, 01:25 PM
Engineer
 
TINKEN's Avatar
 
Join Date: Oct 2006
Location: AZ/CA
Posts: 8,010
Garage
Close inspection of those rollers looks like material has been smooshed from heat near flat spot. I remember your sheaves were getting really hot from using the tracks. Have you switched to tires or are you still using tracks?

Sheave Mods,ShimMod SlipperyWashers WetClutch Manuals: 450, 660, 700.

“Quality is never an accident, it is always the result of intelligent effort.”
TINKEN is offline  
Sponsored Links
Advertisement
 
post #4 of 21 (permalink) Old 06-18-2017, 01:41 PM
Super Moderator
 
MassiveOverkill's Avatar
 
Join Date: Aug 2016
Location: Custer, SD
Posts: 142
What size weights are those that don't have the center ball bearing in them?
MassiveOverkill is offline  
post #5 of 21 (permalink) Old 06-18-2017, 03:20 PM
Engineer
 
TINKEN's Avatar
 
Join Date: Oct 2006
Location: AZ/CA
Posts: 8,010
Garage
12 grams. I've never seen flat spots unless the rollers get near melting point. We need to figure out why they are getting so hot.

Sheave Mods,ShimMod SlipperyWashers WetClutch Manuals: 450, 660, 700.

“Quality is never an accident, it is always the result of intelligent effort.”

Last edited by TINKEN; 06-19-2017 at 08:59 AM.
TINKEN is offline  
post #6 of 21 (permalink) Old 06-18-2017, 09:12 PM
Boss
 
Join Date: Jan 2007
Posts: 3,616
Quote:
Originally Posted by goosehunter312 View Post
Hello everyone.

I was having issues with my Rhino being really sluggish from a start. I suspected that the CVT wasn't shifting all the way down. Sure enough the belt was about 1/4" below the top of the secondary vs 1/8" or so above. After disassembling the primary I found that 3 of the greasless roller weights had flats on them. One was very bad and had flats in 3 spots.

I had this problem back in December with the same style weights but then about 6 of the rollers had flats but they were all minor. Tinken suggested filing the cam sliders and that seemed to help until now.

I have been running with the outer cover off for cooling but wonder if that's letting too much dust in. I'm going to put the cover back on but does anyone have any other suggestions for me to try?

Thanks,

Jason
Who did you buy these rollers from? These look like they are plastic solid rod stock that has been simply parted off on a lathe. you can see the little pips that are left behind when the slug falls off after the parting tool breaks the slug off. 2 issues in my mind: What is the material of the common rod stock? Second, what is the actual true weight? The normal weights are usually molded and a metal insert of various wall thicknesses or differing metals is pressed into the center hole to tweak the final weight. It seems that the solid part off of a slug gives you no way to adjust the weight, as you would not want to make the outside diameter different (changes the gear ratio at the beginning and ending points of the ratio range) nor narrowing the slug up (risking the weight flopping over).
Or, is this the magical weight that would have to be the same for everyone?

2004 Rhino 660
SteveS is offline  
post #7 of 21 (permalink) Old 06-18-2017, 09:36 PM
Super Moderator
 
MassiveOverkill's Avatar
 
Join Date: Aug 2016
Location: Custer, SD
Posts: 142
12 gram must be the lightest weight. 14 gram and heavier all have the center milled out and have a ball bearing weight in the middle:

MassiveOverkill is offline  
post #8 of 21 (permalink) Old 06-18-2017, 10:58 PM
Engineer
 
TINKEN's Avatar
 
Join Date: Oct 2006
Location: AZ/CA
Posts: 8,010
Garage
12 grams. No, I made a set of 8 gram prototypes for Camshaw's green God of Thunder Rhino.

Sheave Mods,ShimMod SlipperyWashers WetClutch Manuals: 450, 660, 700.

“Quality is never an accident, it is always the result of intelligent effort.”
TINKEN is offline  
post #9 of 21 (permalink) Old 06-19-2017, 04:18 AM
Official Site Vendor
 
Hunterworks's Avatar
 
Join Date: Jan 2009
Posts: 3,080
I would think maybe 12 grams is too light and you are getting belt slippage running the temps really high but that is a guess.

The most used weight in a rhino is 16 for a 660 and 18 in a 700, I have never sold 12 gr for anything, I am sure it has it's application we just never sold any.
Hunterworks is offline  
post #10 of 21 (permalink) Old 06-19-2017, 06:52 AM Thread Starter
Slow Poke
 
Join Date: Nov 2016
Location: Richmond Utah
Posts: 33
Sorry it's taken so long to get back to you all.

They are 12g like Tinken said.

I am back to tires now but all that most likely happened with my tracks on.

My stock Rhino with tracks ran best with 12g and a purple spring. I tried 18's and 14's but it was still sluggish trying to climb hills at 7,500' MSL in the snow. (I liked the gold spring but since Tinken suggested trying the purple I gave it a shot. I was surprised how much better it performed with the purple.

On a side note...These tracks are a blast! I've had them in 6' of snow and it does great. I'm almost sad that all the snow is gone.
goosehunter312 is offline  
post #11 of 21 (permalink) Old 06-19-2017, 07:08 AM Thread Starter
Slow Poke
 
Join Date: Nov 2016
Location: Richmond Utah
Posts: 33
I forgot to mention that I believe Tinken is correct about EXTREME heat. I broke 2 belts this winter which is unheard of in a Rhino!

Also, I just noticed a gouge in the worst roller which makes me think something like a rock got in there. I have had this in some mud too since spring time is a mix of everything. Probably should have had my covers on in spring.
goosehunter312 is offline  
post #12 of 21 (permalink) Old 06-19-2017, 08:27 AM Thread Starter
Slow Poke
 
Join Date: Nov 2016
Location: Richmond Utah
Posts: 33
I've been trying to figure out why the belt might be slipping and causing so much heat. One thing I just thought of is that I have some small dings on my secondary sheave. There aren't any noticeable sharp edges to them. I assume it's from rivet heads that broke off. They seem pretty small but do you think this could be causing my belt to slip?
goosehunter312 is offline  
post #13 of 21 (permalink) Old 06-19-2017, 08:54 AM
Engineer
 
TINKEN's Avatar
 
Join Date: Oct 2006
Location: AZ/CA
Posts: 8,010
Garage
Those rollers take a lot of heat as I have had them up to 613°F in a test oven before. I have seen someone melt them before in a sheave, but he vaporized his belt to the point that it disappeared. Haha.

I'd check the primary fixed sheave and see if it is solid on the shaft. Sometimes they strip out and then all the load is placed on the primary sheave. It's possible that the two cvt shafts are misaligned, you can take all the sheaves off and measure between them along their shafts.

Sheave Mods,ShimMod SlipperyWashers WetClutch Manuals: 450, 660, 700.

“Quality is never an accident, it is always the result of intelligent effort.”
TINKEN is offline  
post #14 of 21 (permalink) Old 06-19-2017, 03:52 PM Thread Starter
Slow Poke
 
Join Date: Nov 2016
Location: Richmond Utah
Posts: 33
I will take it apart and check those items. Gotta be something wrong with my machine somewhere! You just don't hear of Rhino's burning up belts like mine has.
goosehunter312 is offline  
post #15 of 21 (permalink) Old 06-20-2017, 05:03 AM
Official Site Vendor
 
Hunterworks's Avatar
 
Join Date: Jan 2009
Posts: 3,080
Quote:
Originally Posted by goosehunter312 View Post
I will take it apart and check those items. Gotta be something wrong with my machine somewhere! You just don't hear of Rhino's burning up belts like mine has.
Have you had any trouble with belts in your rhino with heavier weights with your tires?

Id say you hit the nail on the head, the tracks did it they make a clutch really hot. I would get a CVT blower for it

Then after you went back to tires, the weights were too light and the damage had been done to weights already

Todd
Hunterworks is offline  
Reply

  Lower Navigation
Go Back   Yamaha Rhino Forum - Rhino Forums.net > Technical > CVT, Sheaves and Wet Clutch

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Yamaha Rhino Forum - Rhino Forums.net forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome