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 Post subject: Umarex Gauntlet
PostPosted: Sun Mar 11, 2018 6:15 pm 
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Joined: Sun Aug 19, 2007 11:44 am
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Location: Interior BC
Thought I'd start a new thread and keep this one for bits and pieces.
Mods and hopefully no repairs... :mrgreen:

Started to dismantle... to clean, polish, adjust...etc.
This was one of the first things I found.
Kinda looks like something you'd find in the corner of your shop while sweeping the floor.
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 Post subject: Re: Umarex Gauntlet
PostPosted: Sun Mar 11, 2018 6:56 pm 
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Location: Caronport, Saskatchewan
Wow looking pretty rusted and rough hey! A good polish will do wonders for that one!

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 Post subject: Re: Umarex Gauntlet
PostPosted: Sun Mar 11, 2018 9:31 pm 
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wow... looks like a hammer from a neglected airgun made in the 60's... :shock:
thought these where suppose to be new products... :(

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 Post subject: Re: Umarex Gauntlet
PostPosted: Sun Mar 11, 2018 9:47 pm 
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Location: P.G. B.C.
WOW! Guess I'll be pulling mine apart - LOL Was that stored above deck on it's ride over?

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 Post subject: Re: Umarex Gauntlet
PostPosted: Mon Mar 12, 2018 2:01 am 
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I decided to polish only. Not to sand out the machining lines.
Tolerances were very sloppy to begin with. Same with the bolt and other parts.
More to follow.
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 Post subject: Re: Umarex Gauntlet
PostPosted: Mon Mar 12, 2018 2:18 am 
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Location: Winnipeg, Canada
And I thought my home mades were fugly. Thanks for making my day.

-D.S.

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 Post subject: Re: Umarex Gauntlet
PostPosted: Fri Mar 16, 2018 4:26 pm 
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Got a chance to open up the barrel port a bit to match the air vlv and breech.
Not sure why they wouldn't make them all the same in the first place.

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 Post subject: Re: Umarex Gauntlet
PostPosted: Fri Mar 16, 2018 5:30 pm 
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Get much increase in velocity?

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 Post subject: Re: Umarex Gauntlet
PostPosted: Sat Mar 17, 2018 12:15 am 
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Just getting it back together. Haven't had time to chrony it yet.
I ended up installing the tuning kit from JSAR.
While waiting for the kit to clear CBSA. Others who were first to install the kit were reporting very low FPS.
Even after having adjusting the hammer spring tension.
There was some talk on the valve retainer not letting the hammer push the poppet valve stem open enough.
Travis is now supplying a modified valve retainer which is quite a bit shorter. Didn't want to wait or (even buy) that one and go through all the hassle with CBSA again...@#$%^&
But seeing it was deemed necessary. I made my own.
Image

Got things back together tonite. But had plans with the family this evening. So that's as far as I got.
Maybe tomorrow.


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 Post subject: Re: Umarex Gauntlet
PostPosted: Sat Mar 17, 2018 12:31 am 
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Wow that's quite a bit narrower now! Interesting Travis didn't have this trouble on his prototype. I wonder what changed in the production model to cause the loss in velocity. Hopefully your modification does the trick!

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 Post subject: Re: Umarex Gauntlet
PostPosted: Sat Mar 17, 2018 12:50 am 
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wesb2007 wrote:
Wow that's quite a bit narrower now! Interesting Travis didn't have this trouble on his prototype. I wonder what changed in the production model to cause the loss in velocity. Hopefully your modification does the trick!

Ya you got me... Image
Kinda quiet with those that have installed the shorter retainer...not sure whats going on yet.
Like all new mods...there are always a couple of bugs to iron out....
Nothing else sure getting to know the inners of my Gauntlet!!! Image


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 Post subject: Re: Umarex Gauntlet
PostPosted: Sat Mar 17, 2018 10:58 am 
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Had the valve out? Most of the guts scream "QB", but the one fellow who I saw did a "complete" tear down on youtube, never pulled the valve. :roll:

Just curious whether the similarity continues with the valve....

Al


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 Post subject: Re: Umarex Gauntlet
PostPosted: Sat Mar 17, 2018 11:18 am 
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Looks like a QB valve to me, with slots cut in it. Here's a video with the valve out
https://youtu.be/WS9v3-QUSX0

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 Post subject: Re: Umarex Gauntlet
PostPosted: Sat Mar 17, 2018 11:46 am 
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Location: Coalmont BC
Looks like a quality control issue on the "valve retainer".... I have also seen reports of it not sitting up against the back of the valve (as it should).... so therefore not taking some of the load from the HPA off the valve screws.... Perhaps some of them had the holes drilled in the wrong place (or installed backwards).... No way should you need more than 1/8" valve travel, even that will be wasting air....

Bob

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 Post subject: Re: Umarex Gauntlet
PostPosted: Sat Mar 17, 2018 12:10 pm 
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After watching the Vid again. At the end Travis starts off with "0" load on the hammer spring adjuster and starts to crank in.
Wondering if you went the other way and max out you adjuster and started to back off the adjuster till you notices fps lowering.
Wouldn't that get you closer to proper settings??? (Not wasting air per shot???)
I'm asking...big learning curve for sure!!! Image


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