Umarex Umarex Hammer surgery

[far_shot]

.50 Hammer leak is found.What do you bet that I can't buy this part? I can't even find a parts list to even give the broken valve (?) a correct name
Oh yeah, a dilly of a pickle to tear down the rifle to find the leak. I was expecting a blown o-ring that I could easily replace. Hate to send it in as shipping both ways is more than the part and o-ring cost. Never mind the labor charge.
Worst of all, this rifle is a "clover leaf" shooter at 55 yards and 3 " at 100 yards.
Any suggestions or suck it up?

 

[RM.510bigbore]

.50 Hammer leak is found.What do you bet that I can't buy this part? I can't even find a parts list to even give the broken valve (?) a correct name
Oh yeah, a dilly of a pickle to tear down the rifle to find the leak. I was expecting a blown o-ring that I could easily replace. Hate to send it in as shipping both ways is more than the part and o-ring cost. Never mind the labor charge.
Worst of all, this rifle is a "clover leaf" shooter at 55 yards and 3 " at 100 yards.
Any suggestions or suck it up?

View attachment 537063

Wow your hammer is a impressive shooter...I would defentily fix it...I would hope that Umarex would sell you parts for it considering it is still being made..Keep us posted. Keep up the good work

 

[rdpjr6504]

Hopefully Umarex will sell parts but can 1 be made from Delrin or peek as it looks to be made of plastic ?

 

[hussn32]

Find a local machinist and have them make a new one from delrin or peek

 

[thammer]

I have several of those. Shoot me a DM I'll hook you up.

 

[thammer]

I lied....I only have one. Either way shoot a DM.

 

[SLICKNICK]

Power can be adjusted on the hammer. You have to take bonnet off regulator and add or subtract shims. No shims, it shoots with less power and you get 4 shots. If you get a shim like the ones in regulator and add a thin shim, it will increase about 100 FPS using a 350gr. My stock hammer shot 350 gr, at 840-850. With the added shim 350gr goes 935-950 FPS.

 

[Ezana4CE]

Power can be adjusted on the hammer. You have to take bonnet off regulator and add or subtract shims. No shims, it shoots with less power and you get 4 shots. If you get a shim like the ones in regulator and add a thin shim, it will increase about 100 FPS using a 350gr. My stock hammer shot 350 gr, at 840-850. With the added shim 350gr goes 935-950 FPS.

@SLICKNICK By “shims” are you referring to Belleville washers? A photo would help me understand a little better. Can you post a photo of what you’re talking about?

 

[thammer]

@SLICKNICK By “shims” are you referring to Belleville washers? A photo would help me understand a little better. Can you post a photo of what you’re talking about?

There's flat shims along with the washers. It's just adjusting the actual pressure the regulator allows into the shot bottle.

 

[thammer]

The pressure in the shot bottle determines power output as it's essentially a dump valve design.

 

[SLICKNICK]

Ninja X Regulator Rebuild Parts Kit Paintball Tank Nitrogen Compressed Air NEW | eBay

Being sold by reputable paintball dealer (PB Sports ). This rebuild kit contains all of the parts necessary to rebuild your Ninja X Regulator. X Regulator Rebuilt Kit. 2 bonnet screws.

www.ebay.com

Not my listing but this is the regulator seal kit. I can’t tell you what happens if you add more because I just added 1. They are different thickness in the kit.

 

[SLICKNICK]

The pressure in the shot bottle determines power output as it's essentially a dump valve design. View attachment 540078View attachment 540079

No, those are the spring shims. They need to go back how they were

 

[thammer]

The regulator comes from the factory at 3000psi. Shims are used to get the final pressure. Some may have more or less than others since that's the way they finalize the output of the regulator.

 

[thammer]

No, those are the spring shims. They need to go back how they were

The lower one in the picture is a spring shim. They're are multiple designs. I promise. I did the valve and hammer upgrades for Umarex when it originally was released. Very minor changes so not enough to really consider it a Gen II.

 

[SLICKNICK]

That’s what my reg spring looks. And that’s how many, and the shims that are in mine now

 

[SLICKNICK]

I had a small leak that I figured out was the small seal on the top of piston was worn. It happened after about 1200 rounds. You can see it in picture I posted. Replaced seal, and no more leak

 

[SLICKNICK]

The pressure in the shot bottle determines power output as it's essentially a dump valve design. View attachment 540078View attachment 540079

You can control pressure with shims. It’s roughly around 200psi per shim. I put mine on a gauge, and stock does not output 3000 psi. You can check pressure before mounting reg on rifle with a similar setup

 

[SLICKNICK]

Mine is set at about 3400 PSI. If I remember correctly. I may do a reg cleaning this week, and I’ll verify my output pressure if you would like

 

[SLICKNICK]

That’s a shot string from a 380Gr boat tail slug. That by the way are by far my most accurate slugs. specially for long distances

 

[SLICKNICK]

One more trick. If you want less than 2 moa at 100yds. Use the same magazine slot for the entire shot string. Some strings will be less than 1 moa