DAR Gen II is now available

[Rat Sniper (AKA: PaulT58)]

Good to know!  Sounds like they really went above and beyond on the Gen 2’s! 

[smythsg]

Don, I had issues with most of the screws on my .25 cal DAR being loose as well. After getting everything snugged up and monitoring for leaks, looks like I might have a keeper. I have now shot several mags over the chrony and the regulator seems to be pretty consistent, falling off the reg at about 140, and shooting right at 48 ft lbs with H&N Baracuda out of the box. Now that I know it is a keeper I will clean the barrel tonight and mount an optic for some shooting tomorrow. At this power level, the gun is louder than my SPA M16 which is tuned to the same power level, not backyard frieldly unless your neighbors shoot airguns too.   

[NHGuide]

I told you all I would update on the no air in the rifle and not holding air.
here's how it went.

I called our friends at Aim Sports, spoke with Ryan and Mike.
After describing the symptoms, we settled on the likely culprit being the small internal regulator o-ring.
I happen to have 4,286,355 o-rings ...plus or minus a few  ...laying about in various collections and I happened to have a 90 Buna sized just right... no idea what the number is---though "Subscriber" reposted "Nervoustrigger's" post about the sizes it right above this post. 

It took the following tools.

1.5 mm hex key for the barrel band
5mm hex wrench for the stock screw
1.2mm tip retaining ring pliers for the regulator disassembly
a curved dental tool for removing the o-rings

and that's it.
taking the reservoir off was very easy. with zero pressure in it...all it took was a simple unscrewing of the reservoir (leaving the valve IN the receiver block and unscrewing the fill port assembly on the front), removing the plenum tube and gently pushing the regulator out with a dowel.  Too easy.
 I cleaned the excess lubricant from the inside and blew out any possible foreign debris, reassembled with a small amount of silicone spray on the o-rings and voila! 
reservoir holds air perfectly and the whole process took about a half hour, from thought to completion.

All I can say about Mike and Aim Sports is that I received excellent customer service and no hassles.
Mike and Ryan were very accommodating, and it felt like genuine concern over how to help.

Kudos Aim Sports!

NOW to begin the process of mounting some optics, and running this through the paces.

[avator]

Good for you. Enjoy

[tracker1955]

That was one thing I remember and really liked about the Dar, they were easy to work on. I think they need a little something on that brass threaded insert on the valve tho to keep it in place, Locktite may make the soft brass hard to remove without damage but I remember how loose the gen 1 was too.

[subscriber]

In reading through those two year old threads, I remember someone looking for replacement cone springs.  I assume they had exhausted the obvious sources, such as McMaster:  https://www.mcmaster.com/conical-springs/confined-space-conical-compression-springs/

[Nvreloader]

Hey Guys

Any Idea of what is going on,
I  got my DAR out and had oil running down the plenum, was sitting in the corner of the day room. 
Wiped it off and it's still leaking oil from the plenum tube,
there is a very tiny pin hole about 3.5" above the action, right side of the tube.........    

I have a BAD feeling about this DAR 177, and I have only fired 6 rounds thru it so far.

Tia,
Don

[RDB]

Hey Guys

Any Idea of what is going on,
I  got my DAR out and had oil running down the plenum, was sitting in the corner of the day room. 
Wiped it off and it's still leaking oil from the plenum tube,
there is a very tiny pin hole about 3.5" above the action, right side of the tube.........    

I have a BAD feeling about this DAR 177, and I have only fired 6 rounds thru it so far.

Tia,
Don

Probably a very slow leak pushing the silicone oil out. They weren't stingy with it on assembly.

[NHGuide]

Hey Guys

Any Idea of what is going on,
I  got my DAR out and had oil running down the plenum, was sitting in the corner of the day room. 
Wiped it off and it's still leaking oil from the plenum tube,
there is a very tiny pin hole about 3.5" above the action, right side of the tube.........    

I have a BAD feeling about this DAR 177, and I have only fired 6 rounds thru it so far.

Tia,
Don

SO based on mine, I would say that's silicone oil that is excessively employed throughout the inside of these things.
unless you see a major change in performance, I would just keep wiping it away....and keep shooting.

[Nvreloader]

Thanks Will

The BIG question I have is how can this pressure tube hold air with a hole in it???
It has approx 1500 psi in the pressure/plenum tube, right now..............

Don

[subscriber]

Don,

The pin hole is the vent of the regulator.  The reg uses atmospheric pressure as its reference.  I think the oil may be coming from that small hole.  It could be a warning sign that the small O-ring on the regulator is about to let go.  Some clever people have explained how easy it is to replace that. 

Yes, it is annoying if that happens on a new airgun, but it may be why they are so cheap.  The manufacturer saved a whole dollar by using cheap O-rings...

[nervoustrigger]

Silicone oil will wick aggressively on its own.  Meaning with no leak to help it along.  Just monitor the pressure for a loss.

[Back_Roads]

 IMO shoot it "Like with a car blow the carbon silicone oil out.

[tracker1955]

That pinhole in the air tube is the vent for the regulator, they obviously used a lot of silicone oil when installing the reg, the air expansion on the seals is pushing the excess out. You should be fine as long as there's no air coming out the vent. Do a spit test on the hole for bubbles.

[Dan H]

Maybe we need to come up with ,and o ring list for this gun and a place to buy new higher quality ones , so we can replace the low quality ones with good quality ones ... to make this more simple for our forum members that buy this gun ...   

[Back_Roads]

Maybe we need to come up with ,and o ring list for this gun and a place to buy new higher quality ones , so we can replace the low quality ones with good quality ones ... to make this more simple for our forum members that buy this gun ...   

Not a bad idea, then unlike the Nova Vista gun distributors, There will be normal wear parts readily available possibly right from DAR and partners.

[subscriber]

Maybe we need to come up with ,and o ring list for this gun

https://www.gatewaytoairguns.org/GTA/index.php?topic=146178.msg1521409#msg1521409

[Dan H]

so all the o rings from the gen 1 DAR are the same as the gen 2 ?

[Wayne52]

Are there parts available for these guns   If not the guns are garbage I think cause with the originals it was the same problem, you couldn't buy parts for them.  My .25 was basically garbage out of the box with an over tightened degas screw that's stripped out, I do have some JB weld coming to try fixing it.

[subscriber]

so all the o rings from the gen 1 DAR are the same as the gen 2 ?

While some parts such as the valve are not identical, I suspect that over 95% of the O-rings are the same.  So, Gen1 O-ring list still useful.  What is hopefully different,  is that the Gen2 O-rings were made from something closer to rubber instead of snail snot...  Else we will all be replacing O-rings sooner than later.