HW/Weihrauch Mounting Aperture Sight On Dovetail

Well, I confess I am not at all good with my hands, not any kind of handyman at all. But this one is strange and I think it is probably something that might be obvious to those on AGN that are gifted with mechanical ability. I have a Williams FP-AG-TK peep that was mounted for a long time on a CZ457 22lr with 11mm. dovetail. I moved it to my HW35 a while back and it worked fine. I removed it to use a scope for a while and then tried to mount it on the 35 again. It would not fit on properly. I did not do anything to it that could have harmed it. I tried it also on my HW30 and have the same problem. Here are pictures that might give a clue to you guys, but I am clueless. Any suggestions?

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I assume you are removing the sight from the base, loosening the two grub screws, then fitting the base to the dovetail and snugging up the two grub screws. The final step is tightening down the screw on top that locks the base in. Then you reattach the sight to the base. I agree with BT, it looks like you may be trying to install it fully assembled, could be wrong. I have the same sight on a 30 and 35.
 
That is right, I have been doing it without taking the sight apart, but somehow got away with it until now. I should have read the instructions. So after reading this I took it apart and the base, with the top removed, did the same thing. What happens is after I get it seated in the groves it is flat but as soon as I tighten the grub screws, especially the front one, the right side of the base is leveraged up and out of the groove, no matter how hard I try to hold it down. I thought I had over done tightening the grub screws and bent them but they look straight. I do think the right wedge that moves is cut at a different angle than the fixed wedge on the left of the base, but it may supposed to be that way.
It seems to me the left side is firmly in the groove. Look at this new photo
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, the back of the right wedge has silver marks that may be damage from me over doing the tightening.
 
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That is right, I have been doing it without taking the sight apart, but somehow got away with it until now. I should have read the instructions. So after reading this I took it apart and the base, with the top removed, did the same thing. What happens is after I get it seated in the groves it is flat but as soon as I tighten the grub screws, especially the front one, the right side of the base is leveraged up and out of the groove, no matter how hard I try to hold it down. I thought I had over done tightening the grub screws and bent them but they look straight. I do think the right wedge that moves is cut at a different angle than the fixed wedge on the left of the base, but it may supposed to be that way.
It seems to me the left side is firmly in the groove. Look at this new photoView attachment 392193, the back of the right wedge has silver marks that may be damage from me over doing the tightening.
I've had the same exact thing happen with the same sight. The slotted screw is what you want to make fairly tight, not the 2 little grub screws. Take the sight apart, and tighten the slotted screw as snug as it will go while still allowing it to slide. Set the sight on top of the gun, holding it down flat to the top of the receiver, and gently tighten the two grub screws till the wedge bar fully seats in the dovetail cut. Only go lightly snug. Don't over-tighten them.

Then, with the proper size blade screwdriver, snug the slotted screw moderately tight. Then once again very lightly snug the grub screws, and re-assemble the rest of the sight onto the now mounted base. If done right it should sit square and not creep under recoil. The grub screws hold the clamp bar in proper position, but it's the slotted screw that actually tightens the sight to the dovetail.

ETA: Bear-of-Grayling beat me to it. We must have been typing at the same time! :D
 
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Look at this new photoView attachment 392193, the back of the right wedge has silver marks that may be damage from me over doing the tightening.
The two grub screws have quite sharp/rough ends where they contact the bar- which as you can see digs into the soft aluminum. I have found it helps to remove them, smooth out the contact end with a fine file or sharpening stone, and put a dab of lube there. Lessens damage, and gives you a better "feel" for how much tension you've applied.

As already described, the top screw is very important. The instructions that Beeman sent with these sights back in the day emphasized carefully alternating between it and the grub screws, a fraction of a turn at a time, when tightening things down.
 
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and Mike is completely right
a little side and then a little top
i use all blade sights and they have a bad habit of always being impossible to level, always low on the left but with a peep it would not matter as much
side story
i saw a Williams sight on Ebay but it had a broken side clamping bar which in reality are very fragile
so, i called Williams to see if i could buy the part for the one on Ebay and to have some just because
give me your address we will have those to you right away, no charge and they were at my door in a few days, never did buy that sight but i have a half dozen or more so they i my diopter box
 
I was thinking about buying such diopter. Now I know for sure that it’s not worth doing.
It's a good quality sight, and the long travel of the wedge bar adjustment means it can adapt to a wide range of dovetail widths. Mounting is simple if you go with the instructions. The windage and elevation adjustments also have enough travel to adapt to just about any airgun and/or barrel length. I recently mounted the version without the knurled adjustment knobs on a Diana Chaser. Works great.

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and Mike is completely right
a little side and then a little top
i use all blade sights and they have a bad habit of always being impossible to level, always low on the left but with a peep it would not matter as much
side story
i saw a Williams sight on Ebay but it had a broken side clamping bar which in reality are very fragile
so, i called Williams to see if i could buy the part for the one on Ebay and to have some just because
give me your address we will have those to you right away, no charge and they were at my door in a few days, never did buy that sight but i have a half dozen or more so they i my diopter box
Good decision. Because they charge for them now. About $5. But, they had equipment issue and are behind. Bought one used and the bar was bent, waiting for replacement to get here. I think they’re great little sights.
 
I want to thank you BoG, jccams, and the rest. I looked online for the instructions but couldn't find them so I just followed your explanation and it worked perfectly and was easy even for me. Once I tried it,I could see how it worked though it had me baffled before. It is great to get such good advice.
 
I want to thank you BoG, jccams, and the rest. I looked online for the instructions but couldn't find them so I just followed your explanation and it worked perfectly and was easy even for me. Once I tried it,I could see how it worked though it had me baffled before. It is great to get such good advice.
Glad it worked out, it's a great sight.