Thread: Steyr Problem ?
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Old 12th August 2014, 05:12 PM
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willo willo is offline
Nikon Shooter
Join Date: Aug 2011
Member of: Rivington Riflemen
Location: Bolton Lancs
Posts: 119
Default Reg repair

Hi Peter, my 2 penny worth.
I think you have two problems;
1, is that you have a leak depleting air from the chamber, which as mentioned above could be the reg or the valve, or even any of the housing o rings.
2, the reg is not filling when the pressure in the chamber reduces ( leaking occurs)

The reg contains a small aluminuim piston with a delrin insert, this insert acts as a valve seat against the supply of air from your cylinder and as such operates against pressures upto 200 bar. After time this delrin insert wears and can form a little nipple (mine did)

As your chamber pressure is slowly depleted through the leak, and the piston moves away from the supply jet, the little nipple is still making a seal and not allowing the cylinder air in.

IMO the leak is also coming from one of the two O rings on the piston inside the reg.

Chris will be able to supply you with a reg piston and O rings, but you will need a reg checker and a special forked screwdriver tool to set it back to your prefered pressure (prob around 30 for the piston & O rings)

A set of O rings for the housings is about a tenner, and I would fit in a new firing valve whilst its apart, they're not expensive.

Good luck with your repair, and let us know how you get on.
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