spun Avid drivers

[dcturbo]

Here is what a pair of Avid drivers look like after you spin them..

A few of us were out riding and climbing a couple of weeks ago and I started to climb this chute and as soon as I gave her full wood I feel this THUMP! My first thought was I was about to blow a belt? So turned out and went to check it out.. Belt was fine so I checked my track, tightened it up a touch. So I go to hit the chute again and same thing but this time I am to far up the chute to turn out so I go over the top come back down and tell the group I need to get out of here before something happens with this.. I try to climb out of the bowl and then as I was climbing the drivers spun big time and I was stuck!! We tow the sled to the trees and leave it until the snow sets up enough to tow it out.
So a week later we go back with a plan to get it out..
The snow is still to deep to tow out. I bought a whole bunch of metal wedges that you hammer in on top of hammers and axes to hold the handles on.. We hammer 4 in each driver on the inside and one on the outside of each driver. Duct tape around the driver and shaft to secure them incase I spin them out..
Started the sled up and drove it out the 18 miles back to the trailer

 

[MTdream]

those are soem of the most chewed up drivers I ahve ever seen...the tips are even carved over...

am riding tomorrow with Robbie from Avid...anything we can do for you quickly?

 

[bigbull]

The only time I have seen that happen was under about 14lbs of boost, track was always ran a little too loose (IMO), and the clutching engagement was about 500rpm higher than mine.
BB

 

[winter brew]

Looks like it was time for a new set anyway

 

[zebiraross]

Nice work. I've spun 4 this year on the shaft

 

[Hrt Offroad]

Yep...looks like the track was too loose! They probably got really chewed up because the clocking was off once you hammered the wedges in!!

Horsepower does funny things

 

[dcturbo]

those are soem of the most chewed up drivers I ahve ever seen...the tips are even carved over...

am riding tomorrow with Robbie from Avid...anything we can do for you quickly?

I appreciate that.. I just put the stockers back on.. They should last me until July Then I will call the boys at Avid. I only run 8#'s honest

 

[zebiraross]

Yep...looks like the track was too loose! They probably got really chewed up because the clocking was off once you hammered the wedges in!!

Horsepower does funny things

That's what I was told by Avid and I thought it made sense, so I tightened it a TON and still did the same thing on my second set.

 

[Hrt Offroad]

That's what I was told by Avid and I thought it made sense, so I tightened it a TON and still did the same thing on my second set.

Interesting...For proper tack tension - you should have about 1" - 1 1/2" of track sag below the rails with about 10lbs of force on the track...

 

[Robbie]

Avid drivers

I'm glad that you posted these pictures. It gives me the opportunity to give you all some information that might be helpful. You have about .375-.5" clearance between the paddle tips and the front cooler with 7 tooth 3" drivers and a 2.5" track. The anti-ratchet teeth are almost .75" long. Depending on how loose your track gets there will be a time when the track has moved out the anti-ratchet teeth. After all that is the point of anti-ratchet drivers. When it moves farther than .375-.5" enough the paddles will begin to hit the cooler. There are many things that can cause the track to move out the anti-ratchet teeth. Track tension at rest, the suspension and its' setup, horsepower available, and the body of the snow. Anyway, the farther out the track moves the harder it hits the cooler. The paddles will even have to bend to go by. At 60 MPH the drivers are spinning about 3,000 rpm. For each revolution 7 paddles go by the cooler. That means that the drivers are being subjected to unusual loads 21,000 times a minute. You can expect only so much from anybody's plastic drivers. In fact you are very lucky that you didn't break a chain and take out your lower chain case housing. I have learned this from personal experience. In short, turn out and adjust your track if you feel the track hitting something. Robbie

 

[dcturbo]

I'm glad that you posted these pictures. It gives me the opportunity to give you all some information that might be helpful. You have about .375-.5" clearance between the paddle tips and the front cooler with 7 tooth 3" drivers and a 2.5" track. The anti-ratchet teeth are almost .75" long. Depending on how loose your track gets there will be a time when the track has moved out the anti-ratchet teeth. After all that is the point of anti-ratchet drivers. When it moves farther than .375-.5" enough the paddles will begin to hit the cooler. There are many things that can cause the track to move out the anti-ratchet teeth. Track tension at rest, the suspension and its' setup, horsepower available, and the body of the snow. Anyway, the farther out the track moves the harder it hits the cooler. The paddles will even have to bend to go by. At 60 MPH the drivers are spinning about 3,000 rpm. For each revolution 7 paddles go by the cooler. That means that the drivers are being subjected to unusual loads 21,000 times a minute. You can expect only so much from anybody's plastic drivers. In fact you are very lucky that you didn't break a chain and take out your lower chain case housing. I have learned this from personal experience. In short, turn out and adjust your track if you feel the track hitting something. Robbie

Interesting... thanks for the info.. That is why I have have deleted the front cooler.