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Daisy Grizzly 840 Problems

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Barrikaa View Drop Down
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Joined: May-05-2019
Location: Oakville, Mo
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    Posted: May-13-2019 at 9:16am
I've now repaired ~12 heavily used Cub Scout Daisy Grizzlies, but ONE of those rascals refuses to FIX.  I leaks all the air out in ~4 seconds.   I've replaced both o-rings (TWICE), added slight under-o-ring shims, tried heavier seal oil, inspected EVERYWHERE for cracks, re-sealed the piston head:  no joy.   And of course, Daisy no longer sells the parts needed to repair this (10A, piston, 10D valve body), though they DO continue to sell the gun NEW. Ouch   My ONLY hope now is that there is a crack I cannot SEE in the valve body, and that by cleaning out ALL oil from it, I can maybe run a LITTLE thin plastic glue into it, hoping to seal this invisible flaw.   I might then have to restore the flat piston seat face or the piston movement hole...   Maybe someone badly overpumped this one in the past and cracked the body, but I sure can't SEE the flaw...   Thoughts anyone??   NO idea what kind of glue to use yet...  
Barrika
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the fuse View Drop Down
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Joined: January-20-2013
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Post Options Post Options   Thanks (0) Thanks(0)   Quote the fuse Quote  Post ReplyReply Direct Link To This Post Posted: May-16-2019 at 6:34pm
If it is one of them Daisy plastic valve bodies, my guess is a hairline crack. I had a real nice D 914 range rifle that wouldn't hold....no matter what. On real fine inspection I found a tiny crack. Angry
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cobalt327 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote cobalt327 Quote  Post ReplyReply Direct Link To This Post Posted: May-16-2019 at 10:14pm
Yeah, it's clear plastic. Kind of odd looking being see thru.
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