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Daisy/Avanti 717/747/777 illustrated repair instructions...

March 30 2009 at 4:21 AM
ricdoug  (Login ricdoug)
YF

I got an E-Mail from Mal that someone was requesting
this a few days back. I missed the thread, but am
posting here. Here's the seal and valve repair procedure:

If it's just the adjustment, it's a quick fix:

[linked image]

Schematic:

[linked image]

Here's photo's of when I repaired Mal's 777. If you
take it apart, replace the seals and the valve:

Remove the handgrip screw

[linked image]

Remove other handgrip screw. MAKE SURE THE SAFETY IS ON
OR THE SAFETY SPRING AND BEARING WILL FLY OUT WHEN OPENED!

[linked image]

Remove upper receiver screws

[linked image]

Seperate piston/barrel assembly. Remove the cocking arm
pivot screw

[linked image]

Remove barrel, front sight and piston from chamber.
unscrew old valve and remove old seals and felt washer

[linked image]

The new valve is rounded. The old valve is worn almost
conical. The felt washer disentegrated.

[linked image]

New seals and valve installed. Old seals and valve
on bottom

[linked image]

Apply a touch of Moly Paste to the seals

[linked image]

Assemble in reverse order. Pay special attention to
the silver safety lever position in the bolt

[linked image]

Before repair

[linked image]

After repair, with Lemon Oil hand rubbed into the
grips

[linked image]

Trigger before (777 and 747 triggers
are adjustable by the small screw on the front of
the handgrip frame) adjustment

[linked image]

After

[linked image]

 
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AuthorReply
ricdoug
(Login ricdoug)
YF

Larger Schematic to use with above photo's and instructions...

March 30 2009, 4:22 AM 

[linked image]

 
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ricdoug
(Login ricdoug)
YF

Before and after of Mal's 777...

March 30 2009, 4:23 AM 

Chrony'd before:

[linked image]

Trigger before:

[linked image]

Chrony'd after:

[linked image]

Trigger after:

[linked image]

Target after:

[linked image]

717 and 777:

[linked image]

717 shoulder stock:

[linked image]

717 and IZH-46M rested groups:

[linked image]

 
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M'hackett
(Login 22MK1)
YFOT

Thanks Ric!! This one belongs in the archives

March 30 2009, 10:46 AM 

I put this page in my bookmarks so I won';t have to search for it if I want to see it again.

 
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(Login cartertools)
YC

Valve

March 30 2009, 12:52 PM 

I couldn't get the new semispherical valve to work in my old (1982-3 vintage) 717, which had the conical valve. I found it wouldn't open up enough on firing and retained air in the chamber. So I had to turn it down to the old conical profile on the lathe. Good to see that's not always the case.

Nick,
From ruralburbian Philomath.
anotherairgunblog.blogspot.com

 
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