Gehmann rear iris disassembly

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wilson85
Posts: 89
Joined: Sat Jul 04, 2015 10:43 am

Gehmann rear iris disassembly

#1 Postby wilson85 » Wed May 10, 2017 3:05 pm

Hello Everyone

My missus has a Gehmann 510 basic rear iris on the Central on her omark. It feels pretty sloppy/loose when winding the aperture down around 0.5.

Does anyone have any instructions on how to pull it down and replace a spring or adjust it?

Cheers
Anthony

johnk
Posts: 2168
Joined: Sun Sep 07, 2008 7:55 pm
Location: Brisbane

Re: Gehmann rear iris disassembly

#2 Postby johnk » Wed May 10, 2017 3:50 pm

Engineers hammer.

Seriously, once upon a time, James Corbett (JJJ) used to send them back to Germany for repair but i don't know if he still does or if it would be cost effective. Otherwise, you might be on your own.

Wayne_tri62
Posts: 17
Joined: Tue Aug 16, 2016 2:33 pm
Location: Muckadilla Rifle Club

Re: Gehmann rear iris disassembly

#3 Postby Wayne_tri62 » Wed May 10, 2017 7:33 pm

Hi.
I think all Gehmann rear sight thingsy have a 30 yr guarantee. But if you send it back to Germany this is what is going to happen, as from Gehmann reply email..
" Thanks for your mail.
If you have access to an ultrasonic bath, you can just put the 510s inside together with water and some detergent.
Let it work a few hours and then remove the water with compressed air.
Should work fine, that is what also we would do".

I am still a very new shooter, just very inquisitive, perhaps some A grade gurus will know better, but Sir that's my 2 cents worth. :shock: :roll:

!Peter!
Posts: 99
Joined: Sun Oct 30, 2016 6:35 am

Re: Gehmann rear iris disassembly

#4 Postby !Peter! » Wed May 10, 2017 10:34 pm

It's not that complex. I've had my 565 iris apart and got it back together without problems.

They include the spanners disassemble it if you brought it new.

Key thing is when disassembling it lay the parts out in order, and then inspect, clean and assemble each part in reverse order.

Lowanna
Posts: 5
Joined: Mon Jan 23, 2017 2:26 pm

Re: Gehmann rear iris disassembly

#5 Postby Lowanna » Thu May 11, 2017 8:13 pm

Below is a link to the take down instructions.
http://www.gehmann.com/manuals/566-de-en.pdf

wilson85
Posts: 89
Joined: Sat Jul 04, 2015 10:43 am

Re: Gehmann rear iris disassembly

#6 Postby wilson85 » Sat May 13, 2017 6:58 am

Thanks for the replies gents. I do appreciate it!

I ended up ordering her a new iris for it. Got a couple of OPMs coming up very shortly and don't want it to fail then.

I will be having a go at pulling the old one apart to see what's going on.

budget
Posts: 93
Joined: Mon Jun 11, 2007 9:15 pm
Location: upper north south australia

Re: Gehmann rear iris disassembly

#7 Postby budget » Sun Aug 06, 2017 9:26 am

peter hi ,
they are very simple to pull apart and reassemble ,yours is one of the more simple ones.
i would hazard a guess that the two small screws at the back have come loose,a real easy fix.
good luck.
paul


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