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P 18 worn out springs

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Caveman.
Posts: 9067 - Karma: 330
In sure there are other threads on this but I searched and couldnt really find anything relevant. I have two pairs of P 18 (bomber turn table heel) The older pair, this will be my 6th year on them and I bought them slightly used from Mickael Dechenaux (big claim) are starting to get weak. The windows on the heel are broken so to adjust the DIN I count turns. I have a newer pair of identical bindings. I have them both set on 12. On the newer pair this is about right, I eject if I need to but no prerelease nonsense. Now on my other pair (older pair) I turned the DINs up last week and skied this weekend. The DIN was incredibly weak and I ejected out of heels leaning forward on my skis in the parking lot.

I know its not a forward pressure issue.

Could it be possible that when I tightened my heels (I counted the number of turns it took to tighten the heels on my other bindings) they are two loose which brings up the question of the bindings not being identical at least in amount of turns required to reach the same DIN

Or should I slowly turn up the DIN until it feels the same, I dont really want to do this and if I do it will be in slow half turn increments. I have had shop employees tell me this isn't safe but I think it can be if done cautiously. After all DIN is just a measure of spring tension isn't it? And as the springs wear out this number will become relatively lower.
Dec 9 2008 6:43PM
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MEGAZORD
Posts: 4531 - Karma: -7
Bring it to a shop and have it tested. that will tell you right off the bat what its set at.  They can probably get new windows too
Dec 9 2008 7:40PM
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Dustin.
Posts: 13839 - Karma: 7,704
Best choice right there.
Dec 10 2008 2:17AM
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skisquaw@420
Posts: 1802 - Karma: 13
take both the old and new bindings into a shop and have them make sure the old ones are releasing at the same value as the new ones. the spring probably is getting warn out, but if they still release at the desired Nm, there shouldnt be a problem
Dec 10 2008 2:27AM
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Caveman.
Posts: 9067 - Karma: 330
Thanks for the advice guys, it was helpful. Does anyone have any experience with this sort of thing? Because between now and the new year I am not going to be around a shop that I trust to work on my skis.
Dec 16 2008 10:27AM
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MEGAZORD
Posts: 4531 - Karma: -7
Springs do wear out, but really the only way to tell is have it checked with a huber or similar machine.  Its tough to set the fks by just counting turns, due to mold tolerances from year to year. 
Dec 16 2008 11:00AM
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Caveman.
Posts: 9067 - Karma: 330
Other than cosmetically (one has a little red trim on it) both pairs look identical. Is it possible that they could have come from different molds? Or that the tolerances are great enough that even if they came from the same mold it may be hard to adjust without the window or getting tested?
Dec 16 2008 11:12AM
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strongmark
Posts: 3278 - Karma: 883
the dins go to 18 for a reason, crank em up sucka!

and theyre six years old...not even fks bindings last forever.
Dec 16 2008 12:50PM
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Caveman.
Posts: 9067 - Karma: 330
The window is broken that is why I was wondering if anyone knew how many turns correlated to moving the DIN. And they're not entirely broken yet so why replace them? Plus what other choices do I have? Jesters? Sally? SAS? Meh I'd rather stick with these until they explode.
Dec 16 2008 1:13PM
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