HW/Weihrauch More bad news about my new to me Hw50.

Since it was apart I decided to clean it up in preparation of whatever spring kit I order for it. After cleaning out the grease i found a lump of braze in the top corner of the comp tube.
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If you look carefully you'll see the edge of the transfer port is dented at 3:00. That's worse than you'd think.
Anyways here you can see along the 12:00 edge the dents the braze lump makes as the seal rotates during use.
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This wasn't causing any problems yet because the gun wasn't used alot. This gun will perpetually eat seals, eventually diesel and lose efficiency. Krytox will eliminate the dieseling but won't prevent seal damage and the associated compression losses from it.

This isn't the first, second or even third time I've found sloppy brazes in Weihrauchs. There's no easy home fix for them. Most well equipped machine shops don't have the equipment to machine the corners of the bore without taking the tube over size.

Oh well. You win some. You lose some.
 
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If you are lucky it will break off, had to do the same on an R1 a long ago. That had a mushroom about 1/2 way around the chamber, looking like a partial oring. It really killed the seal, no seal cuttting, just deforming the seal badly when sitting... Horrible recoil - broke a new Weaver V24 in less than 50 or so shots. Gun was new .20cal with spring kit- sadly in the mid 660's with 14.3 Cp's. some of my solder broke off fast, last bit was a mother!!! but once cleaned up with new seal it was ut to 770'+s.
Your splatter is flatter and nuch smaller, will make it harder to get a grip on it. You might be able top make a tool out of a close to bore size socket adding a gripping edge. Brass bar would be ideal, with a scraper, but would take some maching to make. If you have luck it might break off like most of mine did. Good luck
 
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If you are lucky it will break off, had to do the same on an R1 a long ago.
I ain't that lucky. I wouldn't want it to break off. With my luck the loose bits would get stuck in the seal, get dragged up and down the tube and ruin that. I've seen that too. At least fixed, the slag will only ruin seals slowly. There's no fixing a badly scored tube.
 
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I ain't that lucky. I wouldn't want it to break off. With my luck the loose bits would get stuck in the seal, get dragged up and down the tube and ruin that. I've seen that too. At least the fixed, the slag will only ruin seals slowly. There's no fixing a badly scored tube.
I mean break it of with the tool.. I’m totally with you on the loose bits and scoring. Always good to open even new guns, you find a lot of stuff stuck seals.. regardless of brand
 
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I ain't that lucky. I wouldn't want it to break off. With my luck the loose bits would get stuck in the seal, get dragged up and down the tube and ruin that. I've seen that too. At least the fixed, the slag will only ruin seals slowly. There's no fixing a badly scored tube.
once I was able to get a grip on it, it broke of in sections. Did not seem to stick as much to the bore.
 
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Would need to rework spring of couse (reduce force) as when done properly, Oring sealed pistons (when sized correctly) are very efficient, and don't flare/ create so must friction at the end of the cycle.....
Thanks. I think I got it to where a regular VAC seal will work
 
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Thanks. I think I got it to where a regular VAC seal will work
Sorry was on the phone at the same time, met to type flat faced seal.. The Vac seal might be good- pretty thick compared to others. At the time I used a Beeman Laser seal. They were flat, very stiff, tiny lip and a bit shorter height for more stroke.
 
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Ron,

Have you dated this new-to-you HW by the serial number?

I recall you have reported these sloppily brazed HW compression chambers from recent years, but how far back do you think they go?
Sloppy compression tube brazes is nothing new. I've seen them all the way back to the eighties. Yeah there's been alot of qc issues lately. Sloppily brazed ends is just some of it. Theres other stuff too.. in the last 2 or three years something like 6 of the last 7 new guns sent to me had things wrong with them. Two of them were carefully put back together and had to be returned defective for refunds. The rest i was able to fix.
 
Ron,

Have you dated this new-to-you HW by the serial number?

I recall you have reported these sloppily brazed HW compression chambers from recent years, but how far back do you think they go?
According to the Weihrauch owners database this gun is a 2018. Which seems right. It has the lazer etch breech , stamped comp tube and checkered stock without bag cutout. Exactly like my other 177 Hw50 I bought in 2017 or 18.
 
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I mean break it of with the tool.. I’m totally with you on the loose bits and scoring. Always good to open even new guns, you find a lot of stuff stuck seals.. regardless of brand
Yup swarf stuck in a piston seal scoring the cylinder happens so often its cliche. My other Hw50 has a light score in it from such. I used the gun for less than a week when I ruptured the piston seal accidentally dry firing it twice due to inexperience with a loose leade. I've had brand new guns sent to me that I test fired only a few times to assess accuracy and barrel angles get damaged from swarf embedded in the seal. It doesn't take long to score mild steel with steel.
 
My tiny owned sample jibes with what you've been saying. 80's Weihrauchs have a bunch of issues, a 2018 Weihrauch was a mess, a 2009 HW seems most together so far. Wouldn't buy a new HW for any real money, but that's based on other people's reports. A 90's gun would be nice to see for myself.

With a tiny sample any new data point can blow the hypothesis apart, but you gotta have some frame of reference, since the idea that airgun companies progress towards an ever-greater greatness is clearly bogus.
 
My tiny owned sample jibes with what you've been saying. 80's Weihrauchs have a bunch of issues, a 2018 Weihrauch was a mess, a 2009 HW seems most together so far. Wouldn't buy a new HW for any real money, but that's based on other people's reports. A 90's gun would be nice to see for myself.

With a tiny sample any new data point can blow the hypothesis apart, but you gotta have some frame of reference, since the idea that airgun companies progress towards an ever-greater greatness is clearly bogus.
Ive been through dozens of weihrauchs from the early 80s to now. I've found sloppy machining and assembly in all decades. It seemed to get a little worse in the late 20 teens, but then gotten worse again post covid.

The thing that's happening now that's terrible is they're using lower quality welded tubing and the weld seam sometimes leaves a depression down the full length of the tube.
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It's kinda hard to seal that. Sometimes the weld seam is only a discoloration and the hone reaches the bottom of it. Sometimes it don't and it becomes a pathway for air and lube to bypass the piston seal. That's a junk gun. I've only seen these weld seams on post covid 26mm guns. That's why I wanted this to be a pre covid Hw50. It still doesn't guarantee me a flawless gun but it at least doesn't have a visible tube seam. My guess is these guns were being made from more expensive seamless tubing until recently. Hopefully Weihrauch corrects this if they havent already.