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PostPosted: Tue Jul 29, 2014 5:37 pm 
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So I blew off the rear bulb seal from my new SA177 last summer.. left it on the gun table in the sun and supercharged the co2 then poof!!!... I have been trying for all this time to get a replacement up to and including yesterday with a very reliable and resourceful Umarex dealer who says... no can do.... I was sad.. I did get a working one in a leather trade but cant really sell the non BB version for much...
Then just 20 minutes ago it occurred to me...leather seals... 15 minutes later I have 2 full function SA177's...one soon to be on sale.
Magic stuff this leather.
Now to let it dry from molding and oil it.


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Keep you powder dry and your seals oiled.
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http://plinkercases.ca/
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PostPosted: Tue Jul 29, 2014 6:00 pm 
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interesting 8)
let us know if it holds up/lasts :wink:

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PostPosted: Tue Jul 29, 2014 11:02 pm 
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well as it dried it shrunk of course so I am on V2 now with a backing washer made of leather.
The problem seems to be that the slide spring isn't strong enough to compress the leather for a full seal.
Any "grease would I am sure help but eventually blow off I think.
So I have done a better wet mold so it seat much better and will look at perhaps inserting an o-ring to aid in the seal or perhaps a rubberized paint just to give it a slightly compressible surface that doesn't need as much spring to seal it. Maybe a small layer of latex like from a glove..... how does latex like co2?
On the right track as at least a little BB is better than none so far. and with no parts in sights I may as well MacGyver it some how.
This is fun.

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http://plinkercases.ca/


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PostPosted: Wed Jul 30, 2014 8:41 am 
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A little silicon spray and a new Co2 this morning and leather seal is providing 80-90 percent the kick back as the OME. I am ok with that so far.
Also pull the slide spring out a little to helpful give more compression but that will of course also limit the back slide force a little so a trade off perhaps.
may still look into some from of rubberizing the surface. Any ideas?

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Keep you powder dry and your seals oiled.
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http://plinkercases.ca/


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PostPosted: Wed Jul 30, 2014 5:26 pm 
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So it sat on the bench all day nestled against the valve housing. I picked up the two randomly without looking at which was which and ...I cant tell the difference now. So I would say I have succeeded in replicating the bulb seal and reclaimed by SA177 to full blow-back.... for now anyhow.

Thanks for watching!

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Keep you powder dry and your seals oiled.
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http://plinkercases.ca/


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PostPosted: Wed Jul 30, 2014 5:52 pm 
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Nicely done!


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PostPosted: Wed Aug 06, 2014 10:40 pm 
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How do you remove the seal on an Sa177? In mine, it looks like there's a slotted, circular ring around the seal perimeter. The ring can't be unscrewed due to blockage in some areas. It LOOKS like it was sealed into the frame in a couple of places with solder or something...
Is there an exploded diagram for these anywhere?

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PostPosted: Wed Aug 06, 2014 11:02 pm 
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The bulb seal which is mounted on the rear of the slide is the part I replaced and I didn't remove it so much as blow it to pieces... then it fell out of the gun. so that part was easy.
What was left on the post was a split washer (similar to the pic below) which I assume held it in place originally. These press off to one side away from the opening in the "Horse shoe".
I haven't ever had luck finding an EPV for it.


Attachments:
split washer.png
split washer.png [ 21.25 KiB | Viewed 500 times ]

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Keep you powder dry and your seals oiled.
Shoot straight and safe.

http://plinkercases.ca/
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PostPosted: Thu Aug 07, 2014 6:09 am 
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Location: Any Town ONTARIO
What is epv ?

EPV Energy Photovoltaics,
EPV Entry Point Vector
EPV Electronic Payment Voucher
EPV Equivalent Potential Vorticity
EPV Ecrivain Public Virtuel
EPV Earnings Power Value
EPV Endpoint Vector
EPV Extended Precision Vector
EPV Encephaloclastic Proliferative Vasculopathy
EPV Electro Pneumatic Valve
EPV El Perro Verde (Spanish)
EPV Estimated Procurement Value
EPV End Partner Violence
EPV Electrically Propelled Vehicle
EPV Elevated Platform Vehicle
EPV Estimated Project Value
EPV Erosion Preventative Vegetation

These were the giggle results , but I think they are all................NA . ?


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PostPosted: Thu Aug 07, 2014 7:08 am 
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Well these are my favorites....
- EPV Ecrivain Public Virtuel
- EPV Encephaloclastic Proliferative Vasculopathy

However, we are referring to an Exploded Parts View. Similar to the attached. this is far an airsoft glock much like the Sa177 in from factor but different guts. The parts we are talking about would relate to the ones in the upper right section parts Q17-4,5,6... but sadly not the very same.


Attachments:
parts_diagram.jpg
parts_diagram.jpg [ 657.68 KiB | Viewed 488 times ]

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Keep you powder dry and your seals oiled.
Shoot straight and safe.

http://plinkercases.ca/
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