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PostPosted: Wed Nov 20, 2019 1:39 pm 
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Joined: Mon May 06, 2019 4:07 pm
Posts: 158
I got everything assembled but the back cap is slightly off for the pin alignment.what can i use or what do i do to compress the gasram nitro piston to align it up for the pin placement? Also does the thiner part of the gas ram go in the piston or is it the big side


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PostPosted: Wed Nov 20, 2019 5:07 pm 
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first what make is your Nitro piston rifle ?
some Nitro pistons do go in the opposite way
from the look's of it the thin part go's in first for yours but
post a pic of the inside of your back cap there should be a slot in it for the piston end
if it go's in the opposite way

here is a quick vid of a clamp that you can use to press it back in
https://www.youtube.com/watch?v=4JQXmqa2Uj0

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PostPosted: Wed Nov 20, 2019 5:26 pm 
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Joined: Mon May 06, 2019 4:07 pm
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Ya looks like the thicker part goes in the back cap with a shim juat not for sure and you sure a ez grip clamp will work? Its a phantom 1000 conversion kit for my benjamin .22


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Last edited by Ravenairgun on Wed Nov 20, 2019 5:33 pm, edited 1 time in total.
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PostPosted: Wed Nov 20, 2019 5:32 pm 
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Joined: Thu May 07, 2015 8:30 pm
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Location: Eastern Townships
This is a Crosman or Benjamin rifle. Is that your Classic .22, Raven? If so, you will not be able to install the pin, 'cause the holes don't align the same in the springer and gas ram rifles, the tubes are not drilled at the same place.


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PostPosted: Wed Nov 20, 2019 5:35 pm 
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It has the piston with the drill part for the gas ram the powerplants are the same no? Pics coming....


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PostPosted: Wed Nov 20, 2019 5:43 pm 
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These are the old and new pistons one for spring one for ram


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File comment: tNew piston for gas ram with metal indent thing
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File comment: New piston r for ram left old spring right
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PostPosted: Wed Nov 20, 2019 5:47 pm 
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And when i installed the hp spring i had to slightly compress it for the pin im guessing you do the same dor the ram it needs to be slightly compressed like the hp spring


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PostPosted: Wed Nov 20, 2019 6:02 pm 
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Location: Eastern Townships
The ram doesn't have much preload, under 1/8'' IIRC. The piston/seal assembly should have a divot drilled inside up front to receive the SMALL END of the gas ram. Oh and no, the powerplants are not the same. The gas ram assembly is longer than the spring assembly, not by much, just enough to not be able to install the cross pin :wink: .

Are you equipped to drill and tap? Just flip the ram seat 180┬░ and re-drill and tap, I think it's 8 mm x1.


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PostPosted: Wed Nov 20, 2019 6:12 pm 
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Ya the piston does have the drilled thing in it for the small part of the ram thanks now i know it goes that way getting a bigger irwin gripi think should work


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PostPosted: Thu Nov 21, 2019 1:08 pm 
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Gas ram mod for benji .22 acculy worked and shoots great has the phantom 1000 nitro mod. Had to modify some holes for screws but it sits well and shoots great. Getting around 16 fpe with 14.3 grain


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PostPosted: Thu Nov 21, 2019 5:43 pm 
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Nice work!


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