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PCOS/AT Volkl AC4 tips on how to Install!

post #1 of 15
Thread Starter 
I have the Volkl AC4 I have yet to install the PCOS, any tips on how to, size of drill bit, placement of holes, wood glue or not wood glue? Please help
post #2 of 15
shop. six pack.
post #3 of 15
Thread Starter 
I would like to do it myself!
post #4 of 15
Attatch the PCOS to the binding, put the binding on the ski in the correct spot, insert the locking pin through the ski and rail. Now extend the piston to about 3/4 to 7/8 full extension and center it in the ski. Using a marker 4.1mm x 9.1mm drill bit drill through the hole in the piston. It is important to drill through the hole and not to mark it and then drill, because the bit is to long. put a small dab of glue in to the hole you just drilled, and insert the supplied screw. Your bindings should have come with these directions and a paper jig, but this is the way that has worked the best for me.

Also anything said here can not be used to make me liable for any damage to your skis caused by operator error.
post #5 of 15
The PCOS comes with a template that is used to mark the ski. For a non-metal ski, the 3.6 x 9.1 drill bit is what you want. A 5/32 drill with tape that prevents you from drilling more than 1/3 inch will work too. The piston mounting is not rocket science. I even did it. Just mark the holes, double check that every thing will like up and be sure you are centered, then drill. You will need a Posidrive #3 to insert the screw, and you should use some binding glue or epoxy in the hole to seal it against moisture.

BTW you cannot drill through the piston mount because there are 2 screws, and the center one slides under the piston extension. There is no hole to drill through. I have a template here if you don't have one. A shop would put this on for next to nothing. Its not like mounting a binding.
post #6 of 15
Quote:
Originally Posted by bap5000
I would like to do it myself!
Yeah I had the same plan for my AC4s. Then again I tried to rebuild my 4SPDtransmission too. That didn't go to well either.

Anyway change of plans. I just picked up my AC4s from the shop where I bought them but this time with bindings attached minus $21 for mounting.

Let me guess bap5000, you bought your skis and binding on the internet.
post #7 of 15
Thread Starter 

Do you need to Metal Tap the ski before screwing in the Piston Control System

I want to get the clear answer, How to istall the Piston Control System on VOLK AC4's metal ski.... Do you need to metal tap the ski, can you use wood glue or some other type? Size of Bit?
post #8 of 15
Quote:
Originally Posted by bap5000
I want to get the clear answer, How to istall the Piston Control System on VOLK AC4's metal ski.... Do you need to metal tap the ski, can you use wood glue or some other type? Size of Bit?
Bap5000, It doesn't sound like you should do it. Kosackthrower already told you everything you need to know and you are still asking questions. Bite the bullet and have a shop do it.

You don't have to tap the AC4 because (and Kasackthrower and others can correct me if I'm wrong) the AC4 has just a layer of spring steel on the bottom and no steel on the top.

HB
post #9 of 15
Thread Starter 
I asking again, cuz everyone seems to have a diff suggestion, I shop told be that they would have to metal tap, that seemed funny so I asked again. If it's as simple as drilling and then adding wood glue, I believe I can do it. Shops our charging up to $40 dollars.....
post #10 of 15
$40? Worth every penny. How much did you pay for the skis? If more than $200, then have someone who knows what they are doing mount them. We already know that you saved money by cutting the shop out of the selling process.
post #11 of 15
Thread Starter 

Mounted the Pistons!

I mounted the pistons last night, came out perfect, that's for the tips.
post #12 of 15
I just installed the PCOS on 170 Volkl AC4s and have a few questions. I used the template for drilling. The PCOS assembly rattles around some. I have not skied them but it seems like this would be annoying. The "wings" of the PCOS are just at the point of entry into the rail slots. If the unit were placed with the piston at about 50% extension the wings would fit more fully into the rails and the "slapping noise" would likely be eliminated and the unit would seem more secure.

The bindings and PCOS can only fit one way so I am not sure what the deal is. I don't really want to redrill. The slapping sound is kind of metallic and I hear it when just tapping the tip onto the carpet. Where do the wings fit on other peoples Volkls? What is the length (when flat) of the exposed piston? Anyone else notice a noise on their skis with PCOS? If I drill new hole just back of the original and fill the original with epoxy will that cause a problem down the line?

All the photos on Volkl's site show those wings fully into the rails and mine are definitely not like that. Thanks in advance for any input you guys can offer!
post #13 of 15
I don't know anything about mounting these bindings but I'm going to try to link a few photos of my shop mounted AC3s.




Hope it helps. If you want a different view, let me know.
post #14 of 15
Ltack18 - the photos are a great help! The PCOS unit I received with my AT bindings is totally different. It has 3 strips of metal on the front, not 2, and it has "wings" on the front piece and it is longer at about 17.5" long. I wonder if I was sent the wrong PCOS with my AC4s? That would certainly explain a lot.

I was just going to post a photo but have not done it yet on this site, looks like you need to upload it to a site with a URL to do it. Maybe I will figure this out later.
post #15 of 15
The PCOS you see was the american redesign for the '06 season. The wings were elimanted and it has two mounting screws, one in the front you can see, and one in the middle of the arm with a sliding slot.

The PCOS arm that you have on your AC4 was either from canada, or was a early release ski from the end of the '05 season.

Also the shops were sent a jig that was redesigned to move the arm further back in to the rails, in order to eliminate the noise you hear.

Sometimes it is worth it to pay a shop to do it for you, yes/no?
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