had to heli lift my Tapex of the ice cap yesterday. brocken chain again...

[apache]

two chains in 1500km. both snapped at wot. at only 10lb of boost.
tension was good. just checked it the day before.
anyone else having this problem?
is there a stronger chain for an Apex?

 

[HYFLYR]

That sucks. I would look into alignments and bearings in the driveline if i were you. Something could be off or out of spec, not saying it is but possible.

 

[apache]

are there any adjustments, other than tension, in the chain case?

 

[powdermuncher]

Make sure there you didn't mess up with washers on the gears-----if tyhe chain is out by just a bit it can not last.

 

[Linc]

Where is it now now,I have to go pick one up tomorrow from the Heli pad.

 

[apache]

already had it fixed Linc. thanks though.
I saw the Tapex you're picking up over there at the heli pad.

 

[Snoboner]

Which kit? Broke mine when the lower gear bolt head sheared off. I run a Boondocker and speculation is the heat caused the head to weaken

 

[Climbmax]

They don't break chains for no reason. They are Hyvo and tough as nails.....there isn't a better chain available.
Could be shimmed improper, tension too tight, bearing in chaincase toast, Gears are ruined. Have a pro look at it..........probably save you a third or fourth chain explosion.

Good luck
RS

 

[DARKO]

I agree, theres no way that chains breaking without something else causeing it. There must me a bearing seized or something climbmax metioned. I have huge km's on boosted sleds and ive never had a chain break, let alone even stretch.

 

[Linc]

Something is wrong,hopefully it's fixed right,,,fly outs cost way too much money.

 

[Den C]

Is your track ratcheting? I've seen lots of sleds break chains cause the track was to loose.

 

[snowy1]

as has been said somethings wrong, I ran the same chain for three seasons and never saw under 14 lbs boost mostly 18+, with no problems.

 

[apache]

They don't break chains for no reason. They are Hyvo and tough as nails.....there isn't a better chain available.
Could be shimmed improper, tension too tight, bearing in chaincase toast, Gears are ruined. Have a pro look at it..........probably save you a third or fourth chain explosion.

Good luck
RS

good news. the chain snapped clean. all the links in one of the junctions broke clean.
because I flew it out and didn't try to spin the track( it was locked) I saved my chain case and gears. only had to put a new chain in.

thanks for the good info. now lets see...
the chain tension was good, the gears and bearings are good, I even had my jack shaft bearing and drive shaft bearing changed last summer with new ones just in case. and I did have a professional work on it.

what do you mean by "shimmed improper"?

 

[apache]

anyone?

 

[Climbmax]

mek sure the chain is running true to the sprockets......nice and level

 

[JDKZRT]

Gears --- change them too.
Something is wearing or fatiguing the chain pins.
I've never been able change the chain on anything without changing the sprockets also (bikes to bicycles).

 

[Linc]

2nd,,,when it costs 1200 bucks to fly it out,the sprockets are a pretty minor cost at this time.

 

[Mountaintech]

Make sure the gears are perfectly in line with each other........straightedge. There are shims or washers behind them that are supposed to take care of that. I've never broken a chain either.

 

[Ken Climb]

"I even had my jack shaft bearing and drive shaft bearing changed last summer with new ones just in case."

I bet its something to do with what you had done here......cause since you've broken what,...... 2 chains??

5 years for me running a yami with boost and I've never broken a chain............ someting not right der fella!

 

[apache]

"I even had my jack shaft bearing and drive shaft bearing changed last summer with new ones just in case."

I bet its something to do with what you had done here......cause since you've broken what,...... 2 chains??

5 years for me running a yami with boost and I've never broken a chain............ someting not right der fella!

all I did was change those bearings because I've had them fail before on my stock Apex. they get water in them and go bad. the first chain broke before I did that anyway.
I'll check the alignment of the gears though, could have something there...