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PostPosted: Wed Dec 05, 2018 10:01 am 
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Joined: Sat Apr 13, 2013 12:19 pm
Posts: 329
Location: Edmonton
Got one and the gun won't hold air. When cocking and trying to close the slide, there is always a sound coming/leaking from I don't know where. Tried to change the o-ring on the piston part but still the same. Is there any o-ring aside from the air port and the piston which need to be changed?

Thanks for any suggestion.

A

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PostPosted: Wed Dec 05, 2018 10:08 am 
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Joined: Mon Aug 08, 2016 7:23 am
Posts: 2062
Location: Somewheres near the Atlantic
Probably leaking from the valve.

Honestly I don't try and fix these. I got 1 working and 2 for parts.


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PostPosted: Wed Dec 05, 2018 10:28 am 
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Joined: Wed Oct 29, 2014 10:49 am
Posts: 193
Location: Quebec
There are two o-rings on the firing valve, one that seals the stem and another that rests against the seat:

Image


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PostPosted: Wed Dec 05, 2018 11:12 am 
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Joined: Sun Mar 26, 2017 11:26 am
Posts: 29
Location: GTA
Excellent instructions (with pictures) on these links:

http://anotherairgunblog.blogspot.ca/2009/02/derricks-on-beeman-p17-overhaul-part-1.html
http://anotherairgunblog.blogspot.ca/2009/02/derricks-beeman-p17-overhaul-finale.html


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PostPosted: Wed Dec 05, 2018 12:30 pm 
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Joined: Sat Apr 13, 2013 12:19 pm
Posts: 329
Location: Edmonton
Thanks for all your help! I will try them and see if it works... hopefully :-)

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PostPosted: Wed Dec 05, 2018 2:11 pm 
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Joined: Wed Jul 26, 2017 7:01 pm
Posts: 1407
Location: GTA, ON
Yep, I remember I followed this guy to work on my P17. And the P17 is the first one and so far the only one gun I stripped down to this level and put it back together...

Not a very difficult job.

But if you really like this gun, go for a HW40 which will give you much much better over all quality. Using the extra time in shooting is better than working on the gun.

Sent from my LG cellphone

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Izzy 46M
HW30 Stainless Steel
2240+14" barrel/Williams peep sight
Daisy 953/3-9x40 AO Hawke Scope
P3+2x20 Kit Scope
HW40+Extender
HW45+Grip panels from Russia
P1322 with walnut forearm


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PostPosted: Wed Dec 05, 2018 5:45 pm 
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Joined: Sat Apr 13, 2013 12:19 pm
Posts: 329
Location: Edmonton
YepYep wrote:
Yep, I remember I followed this guy to work on my P17. And the P17 is the first one and so far the only one gun I stripped down to this level and put it back together...

Not a very difficult job.

But if you really like this gun, go for a HW40 which will give you much much better over all quality. Using the extra time in shooting is better than working on the gun.

Sent from my LG cellphone


Hi lead,

Thanks for this. I think I can repair it (hopefully haha) before it goes to the trash. I got this one because of the many good reviews but if worse I can't repair it I have a pp700sa in 177 coming from Web. I think pcp's are much easier to work on .

A

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Aim,hold your breath and follow through


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PostPosted: Wed Dec 05, 2018 11:02 pm 
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Joined: Wed Jul 26, 2017 7:01 pm
Posts: 1407
Location: GTA, ON
You are right ~ although I already gave my P17 to a friend as a part gun as I met a problem I can't fix anymore and always toast the gun on fire, I will still give 4.5 stars to this gun over 5 stars ~

You will never ever find a gun shoots this accurate at this price range ~ and except the built quality, everything the P17 just works so well and opened a whole new world to me to spend more money in this hobby ~ [emoji38]

Sent from my LG cellphone

_________________
Izzy 46M
HW30 Stainless Steel
2240+14" barrel/Williams peep sight
Daisy 953/3-9x40 AO Hawke Scope
P3+2x20 Kit Scope
HW40+Extender
HW45+Grip panels from Russia
P1322 with walnut forearm


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PostPosted: Mon Dec 10, 2018 3:51 pm 
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Joined: Sat Jan 25, 2014 9:16 pm
Posts: 1203
Location: United States
Don't forget the inlet hole in the compression tube. It often has a burr that cuts the O-ring so it may have cut yours first thing. It's easily the #1 issue with these guns so fyi. I use a Dremel with a tiny ball bit to smooth the radius of the hole, which is where the issue is. Then follow with a rubber grit ball to smooth it out enough for the O-ring. I also take 320-400 sandpaper rolled up super tight like a toothpick so I can get it in the hole to reach where the ball won't. If you don't have a dremel then that may be your only option.
You need to get down in that hole b/c when the O-ring passes over it it kinda squirts into the hole. Point being a burr half way down in there can still get it.
Also; the guns usually have dead air space between the piston and valve so putting some shim on the piston face will help bump power. You can also mod the valve for better flow. I have instructions and pix for those and other mods in my partially finished guide if you want it; chevota at hotmail.
There is one other o-ring pinched in where the comp tube meets the valve body. Apparently a few have had it leak there so to narrow it down you can check with dish soap and water.


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