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  #1  
Old 12-03-2012, 06:10 PM
ggenovez ggenovez is offline
 
Join Date: Nov 2012
Posts: 9
Default 853 trouble

Hi all,

I recently purchased a 853 from the CMP. Very nice air rifle with a bad trigger. So I did the trigger upgrade.

I put the rifle together.

Now it won't pressurize.

I can hear it sucking air in and out when I pump the handle but no pressure.

Any ideas?

Thanks!

G
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  #2  
Old 12-03-2012, 07:59 PM
ggenovez ggenovez is offline
 
Join Date: Nov 2012
Posts: 9
Default Update

Ok,

I can hear air pushing through the barrel when I pump.

If I put my thumb over the barrel, I can feel air blowing or a vacuum, as I pump.

Any ideas?

thank you.

G
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  #3  
Old 12-03-2012, 09:27 PM
ggenovez ggenovez is offline
 
Join Date: Nov 2012
Posts: 9
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Much sadness.

Looks like the latch broke and the piston is pushing on the relief valve.

UGH! I can't believe it.

Any advice???
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  #4  
Old 12-04-2012, 01:58 AM
ac12 ac12 is offline
 
Join Date: May 2012
Posts: 18
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Sounds like the valve is stuck OPEN.
Try cocking just the hammer and firing it a few times, to see if the impact of the hammer will unstick the valve. If that does not work, I think you need to rebuild the valve. Parts are cheap and available from Daisy.
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  #5  
Old 12-04-2012, 05:23 AM
ggenovez ggenovez is offline
 
Join Date: Nov 2012
Posts: 9
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Thanks AC12

Looks like part 853-29, the plastic latch shattered.

Is it possible the plunger is too far forward because that part is broken and always engaging the valve?
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  #6  
Old 12-04-2012, 10:45 AM
ac12 ac12 is offline
 
Join Date: May 2012
Posts: 18
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If that is the latch that engages the pump lever, then NO. All that does is hold the pump lever in place. It is just a coincidence that it is broken at the same time you have this problem. Now if you have latch fragments floating around inside the receiver, then could create other problems.

When you pull back the bolt handle, does the hammer engage the trigger sear?
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  #7  
Old 12-04-2012, 10:46 AM
ggenovez ggenovez is offline
 
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Yes it does.
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  #8  
Old 12-04-2012, 11:30 AM
ac12 ac12 is offline
 
Join Date: May 2012
Posts: 18
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hmmm, I was thinking that the hammer pressing on the valve may have been keeping the valve from seating.

Then it sounds like you need to rebuild the valve, to clean out whatever is causing it to stick open.
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  #9  
Old 12-04-2012, 11:32 AM
ggenovez ggenovez is offline
 
Join Date: Nov 2012
Posts: 9
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probably fragments of the pump lever.

Thank you.
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  #10  
Old 12-16-2012, 10:30 AM
presidentg presidentg is offline
 
Join Date: Oct 2009
Location: Northeast Ohio
Posts: 1,566
Default

I did a trigger job on my 853 and it turned into a bit of a wrap-around. The sear has two "hooks" one to release the hammer, which is to the rear and one which holds the hammer off the valve (I guess?) which is to the front. I had shortened the sear but left the forward hook it's original height. I found that the hammer then hit the forward hook preventing a solid strike to the valve. Had a lot of failure to fire. Once I ground down the forward hook the FTF disappeared. Perhaps you shortened the forward hook too much?
The plastic lever latch broke on mine also.
Will the rifle pressurize if you cock the rifle before you charge it? The manual states the bolt must be open before charging.
Here's a link to a copy of the manual in case you need it.
http://gnewyear.com/files/853.pdf
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Last edited by presidentg; 12-16-2012 at 10:41 AM.
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