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ANSCHUTZ 250 HYDRAULIC DAMPER REPAIRS

Anschutz 250 Hydraulic dampner

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big52
Joined: 04 Nov 2007
Posts: 17
PostPosted: Mon Feb 18, 2008 7:07 pm    Post subject: Anschutz 250 Hydraulic dampner Reply with quote Edit/Delete this post Delete this post View IP address of poster

Was wondering if anyone here has any expirience at rebuilding the hydraulic dampner unit in the anschutz 250? So far I have found out some info but am needing to know what rod seals were used what type and size, seems like a hydraulic seal manufacturer should have something that will work if I know what I am looking for, any help would be appreaciated thanks.
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pdeal
Joined: 02 Mar 2004
Posts: 387
Location: West Virginia
PostPosted: Tue Feb 19, 2008 5:45 pm    Post subject: Reply with quote Edit/Delete this post Delete this post View IP address of poster

Yes I have done one. Unfortunately I can’t remember the details. On my gun the breech seal was all gummy almost like bees wax and the hydraulic damper was leaking. I turned a new breech seal from nylon and that worked well. When I ordered the hydraulic seals I ordered two extra and have them here. I bought them from MSP Seals, Inc. in Indianapolis, IN. their phone number was (this was 2005) 317-541-9980. The description of the seal is 5x12x5.5 U-Cup, Symetrical Urethane. The thing I can’t remember is if the seals just fit right in or I had to put it in my lathe and bore pockets for them to fit into. For oil I think I just used some 20 weight machine oil or similar. I shot the gun some with a new breech seal but the damper not rebuilt and the gun shot very badly. Once I rebuilt the dampener it was a really good shooter so the thing is pretty important. Beautifully made guns!
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big52
Joined: 04 Nov 2007
Posts: 17
PostPosted: Tue Feb 19, 2008 8:17 pm    Post subject: Re: Anschutz 250 Reply with quote Edit/Delete this post Delete this post View IP address of poster

Thanks so much, and I measured a unit I have here and the seals sound absolutley correct, you are the first person to help me out so far on this, I appreaciate this very much.
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aross007
Joined: 06 Apr 2008
Posts: 14
PostPosted: Sun Apr 06, 2008 9:18 pm    Post subject: anshutz 250 Reply with quote Edit/Delete this post Delete this post View IP address of poster

I have a 250 that I bought new in 1968. I’m just now trying to get it shooting again. The breech seal is the same gummy beeswax, and I can probably make one out of nylon if I can get some and figure out how thick to make it. I don’t know about the internal seals. How many are there and are there different sizes?

Thanks for any advice,

Alan

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pdeal
Joined: 02 Mar 2004
Posts: 387
Location: West Virginia
PostPosted: Wed Apr 09, 2008 6:49 am    Post subject: Reply with quote Edit/Delete this post Delete this post View IP address of poster

The only internal seals are in a hydraulic damper. It is a little cylindrical aluminum thing that has a rod sticking out each end. Inside it has a little piston with loose fit. Each end of this has a hydraulic seal. and these are what may need to be replaced if your damper is leaking. The breech seal as you said can be turned from nylon. I remember it being a little tricky to get the length of the breech seal just right. I think it took some trial and error.
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aross007
Joined: 06 Apr 2008
Posts: 14
PostPosted: Wed Apr 09, 2008 11:28 am    Post subject: Thanks Reply with quote Edit/Delete this post Delete this post View IP address of poster

pdeal,

thanks very much.

Alan

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Gunnut
Joined: 04 Feb 2011
Posts: 1
PostPosted: Fri Feb 04, 2011 4:08 pm    Post subject: Anschutz Reply with quote Edit/Delete this post Delete this post View IP address of poster

It may be too late to be of much help, but I have just over-hauled my 250. The damper seals are hydraulic ram seals 5 x 12 x 7 and readily available in Auckland NZ. The breech seal I machined out of a soft urethane and made a die with 65 degree angle and length to suit the breech. This I mounted in the lathe tailstock and the piston housing in the chuck. I heated die and run it upto the partly formed seal which melted a little and made a perfect seal at the correct length. The piston buffer was also disintegrated and this I made with a harder machinable nylon. The gun shhoots OK, but is very pellet sensitive and not all that powerful.
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