Author Topic: More DAR bad luck (Read 20363 times))

Wayne52 · « **Reply #60 on:** August 05, 2018, 12:49:09 AM »

Tom if it was a slow leak and didn't dump the air I'd be inclined to think there might be a burr on your vent hole

I was able to get my finger up inside the tube far enough to feel mine. I never did check for a burr with my 177 but it's still holding air fine. I've probably had the 177 apart and back together 5 times adjusting the reg with the same two 90 duro's and they're still sealing good.

BigMike1 · « **Reply #61 on:** August 05, 2018, 10:53:02 AM »

If its a small leak i would be inclined to dissemble the regulator and replace the orings inside it then look Very close at the area where the regulator sildes in the air tube, all the way to where it rests..I had some machine marks so I ran a brake hone in mine after the second time mine let go and replace with viton orings (the only thing i had on hand) and it has held ever scene ..
Mike

tracker1955 · « **Reply #62 on:** August 05, 2018, 10:34:07 PM »

Played with the DAR some more, seem to have the o-ring from a Bam B-50 repair kit sealing the regulator, at least for now. Got to shoot three mags after work before having to do other things, holding air to 3000 psi at the moment but very skeptical about it lasting. I would love to see it prove me wrong. No burs inside the air tube at vent hole, even looks pretty smooth inside, just think tube ID is oversized.

Wayne52 · « **Reply #63 on:** August 06, 2018, 02:31:21 AM »

I'm looking forward to when the parts for these guns are available, I'm hesitant about taking the regulator apart at the moment on these because they seem to work so good for consistent shots throughout the shot strings. Hopefully the parts are reasonably priced as well like most Chinese airgun parts are, even most of the Crosman stuff is made in China now I think and they're prices are really inexpensive as well. It would be nice if DAR came out with a whole line of products like SPA has because from what I've heard many of the SPA models are only available in north America with the Diana name on them now and from what I've heard they have exclusive rights for dealing many of the models.

I'm convinced that the 90duro's are going to be just fine in both my 25 and 177 because the leaks have disappeared in both of them. I had the 177 out in the woods early this morning and christened it with it's first squirrel, a red squirrel at a good distance too.

tracker1955 · « **Reply #64 on:** August 06, 2018, 07:09:41 PM »

Well the fun was short lived as I rather expected, got home from work, checked the rifle, still holding at 3K, shot through 3 mags then whooosh.

and to top it off no replies from Aim Sports from Fridays email to Ryan. Glad others have gotten theirs to hold air. I didn't buy this to have a pretty paperweight.

Rat Sniper (AKA: PaulT58) · « **Reply #65 on:** August 06, 2018, 08:40:59 PM »

Quote from: tracker1955 on August 06, 2018, 07:09:41 PM

Well the fun was short lived as I rather expected, got home from work, checked the rifle, still holding at 3K, shot through 3 mags then whooosh. and to top it off no replies from Aim Sports from Fridays email to Ryan. Glad others have gotten theirs to hold air. I didn't buy this to have a pretty paperweight.

Dang Tom, was that with the Dura90 o-rings? I'm still chasing a slow leak, it loses about 10-20 bar over a 24 hour period. I have the Dura90 o-rings on the regulator and the Dura70's on both ends of the air tube like Wayne, but I'm about ready to swap the 70's for 90's for the ends of the air tube and see if that fixes it.

BigMike1 · « **Reply #66 on:** August 06, 2018, 09:32:53 PM »

Tom Im sorry to hear your having such a time with the dar ! Has any one measure the tube ID and the OD of the regulator to see how sloppy the fit is on the guns that are having trouble sealing? My regulator fit nice without Orings so I knew it should seal with good orings .
Again on mine i ran a fine stone brake hone in where the reg sits. im using 75d viton orings they are rather soft compaird to the 90d some others have had successes using.. One more thing that crossed my mind the oring groove on the regulator should be polished very smooth on the top edge.. Just typing out loud

triggertreat · « **Reply #67 on:** August 06, 2018, 09:42:32 PM »

Really hate reading about all the troubles with the DAR Tom. I'm beginning to think DAR stands for dang air rifle or worse. Hopefully since AIM is not responding in a timely manner, maybe you might can dispute the cc charges.

kingrude1 · « **Reply #68 on:** August 06, 2018, 09:42:50 PM »

Quote from: tracker1955 on August 06, 2018, 07:09:41 PM

Well the fun was short lived as I rather expected, got home from work, checked the rifle, still holding at 3K, shot through 3 mags then whooosh. and to top it off no replies from Aim Sports from Fridays email to Ryan. Glad others have gotten theirs to hold air. I didn't buy this to have a pretty paperweight.

I too emailed Thursday night, then decided to call on Friday at which point they said they had forwarded my email to the Dar rep, which I guess is Ryan. They assured me he would be in contact on Friday, well it's Monday and still no email. Might be buried with returns on this rifle as seems like a working one out of the box is the exception and not the rule.

tracker1955 · « **Reply #69 on:** August 06, 2018, 10:15:46 PM »

I have the 70 duro on the ends and they seal fine, the problem all along has been at the regulator. The 90 duro wouldn't hold either, the ones that just let go tonight were a metric set from another rifle that went to my grandsons a couple years ago, they were in repair parts I'd hung onto for it.

Rat Sniper (AKA: PaulT58) · « **Reply #70 on:** August 06, 2018, 10:34:18 PM »

Maybe it's time to add some dental floss to the grooves on the regulator like they came from the factory! Seems odd, but if it works...

Vee3 · « **Reply #71 on:** August 07, 2018, 02:26:13 AM »

Quote from: tracker1955 on August 05, 2018, 10:34:07 PM

Played with the DAR some more, seem to have the o-ring from a Bam B-50 repair kit sealing the regulator, at least for now. Got to shoot three mags after work before having to do other things, holding air to 3000 psi at the moment but very skeptical about it lasting. I would love to see it prove me wrong. No burs inside the air tube at vent hole, even looks pretty smooth inside, just think tube ID is oversized.

Just curious here, does the area of the ID of the tube where the o-rings seal appear to have been machined? If so, one should be able to see a slight step inside of the tube, down past where the o-rings sit.

On my SPA M-10s, the ID of the tube is bored (just past the threads on both ends, where the end cap & valve o-rings seal) to true up the slight out-of-round condition present in the tube stock used for the reservoir. That's standard practice when designing pneumatic/hydraulic thingies.

Wayne52 · « **Reply #72 on:** August 07, 2018, 03:13:19 AM »

I'm still waiting for someone to open the inside of the regulator on these, I just haven't had the inclination of doing so because both of mine sealed fantastic with the 90duro's. I've since degassed both of them after putting them in to readjust the regulators on them and reassembled them both having great results. One of these days I'll get an assortment of smaller ball hones just for using on the PCP guns because my Mrod really does need a ball hone put through it to smooth things out.

Victor these Dynamic air rifles are actually a whole horse of a different color from the SPA guns, I've also got an Airmax Dominator which I bought from Mrodair when they first hit the market, the gun is a real nice solid gun all the way around, I have only had to replace 2 of the probe fill o rings in it after thousands of rounds through it. I've also modified it a little too and am getting about 40 shots at 43fpe with the 30grain .22 BBT's which shoot extremely well from it.

I'd really like to see JSAR be able to get either the M11's or M22's because they're one of the better bolt guns out there in my opinion, they're super powerhouse guns indeed and have some really fantastic barrels on them as my Airmax Dominator does. My dominator has a mono block design for the main internals though. They have the Mrod beat hands down in my opinion too, my .25 Mrod is a wimp compared to how the M10's are in the power department.

I can't really recall just how well the grooves are where the I.D. of the o rings make contact, they could probably use some polishing up if you're still having sealing problems.

I've recently adjusted my DAR25 for a 10 shot power string, I was basically getting it ready for testing the 25 cal BBT's which I'll be casting within a couple of days, I just checked a little while ago and the mold has been shipped and is due here Wednesday

When I did this string I used cast pellets I also made from an NOE mold and I weighed each pellet individually and kept them all close to 34.5 grains

After I've put some of the .25 BBT's through it the tune indeed might be changed
FPS FPS
1. 900.8 34.58g 62.32fpe 6. 914.7 34.66g 64.40fpe
2. 910.2 34.42g 63.33fpe 7. 899.2 34.48g 61.92fpe
3. 914.4 34.64g 64.32fpe 8. 872.4 34.66g 58.58fpe
4. 918.4 34.42g 64.48fpe 9. 895.4 34.52g 61.46fpe
5. 900.4 34.62g 62.33fpe 10. 891.3 34.32g 60.55fpe

BigMike1 · « **Reply #73 on:** August 07, 2018, 09:17:33 AM »

TheSaint

Real Name: Mike

Re: Does anyone recognize this regulator ?
« Reply #13 on: August 04, 2018, 03:25:27 PM »
Quote
The regulator is an expanding piston type. There is a spring behind the piston. To disassemble the regulator, use a pin wrench or snap ring pliers to spin off the brass disc/keeper. Thread the appropriate sized bolt, I thing it's an m5 into the center of the piston. Put the reg in a padded vice, and use pliers to pull the piston out with the bolt. The only thing that adjusts the pressure is the knurled knob.

tracker1955 · « **Reply #74 on:** August 07, 2018, 09:25:38 AM »

Paul, I tried dental floss, teflon tape, both without success. I still believe this tube is oversize on its ID.

BigMike1 · « **Reply #75 on:** August 07, 2018, 09:49:19 AM »

I would really like to mic the air tube and the regulator so we can get to the bottom of this!

Rat Sniper (AKA: PaulT58) · « **Reply #76 on:** August 07, 2018, 01:14:50 PM »

Quote from: BigMike1 on August 07, 2018, 09:49:19 AM

I would really like to mic the air tube and the regulator so we can get to the bottom of this!

I have a cylinder hone arriving today. I will be disassembling it to try and smooth the area where the regulator sits and will be swapping the 2 Dura70 o-rings on either end of the air tube for Dura90 0-rings to see if this will stop the slow leak I still have. I will measure the ID of the tube and the OD of the regulator before I do any smoothing to the inside of the tube. I'll post what I find afterwards.

TheSaint · « **Reply #77 on:** August 07, 2018, 01:31:43 PM »

I've got a pretty good feeling that Dynamic won't be around long. They brought a product to market that I've now decided wasn't even Beta. More like Working Prototype. And now emails and phone calls aren't being returned. I'm giving them til the end of today to resolve my issues with the .22 I have, which is now relagated to Paperweight status, also. If I don't hear anything, then Sportsman's Guide is getting an earful tomorrow morning. We really shouldn't have to be going thru this. A little tinkering is one thing, but doing Aim Sports in field R&D for them, free of charge, is unacceptable.

Gertrude · « **Reply #78 on:** August 07, 2018, 01:32:35 PM »

Tom,
Have you verified where the leak is coming out of the gun ?
Soapy water at all possible leak paths ? Balloon over barrel ?
Have you measured the ID that you suspect to be oversized ?
It seems odd to me that this rifle is having so many problem with leaks.

Heck, I reassembled mine using the original orings and it is holding air just fine.
I did notice some floss/tape under the regulator o ring on mine too. I simply tucked it down into the groove and used some silicone grease on assembly. It went together very easy.

My group of buddies ordered 4 more of these rifles, and we should be seeing them within the next week. They had to take a detour through Az on there way to Ca. I am hoping they will all be good on air when they arrive. We'll know pretty soon.

kingrude1 · « **Reply #79 on:** August 07, 2018, 01:59:33 PM »

Quote from: TheSaint on August 07, 2018, 01:31:43 PM

I've got a pretty good feeling that Dynamic won't be around long. They brought a product to market that I've now decided wasn't even Beta. More like Working Prototype. And now emails and phone calls aren't being returned. I'm giving them til the end of today to resolve my issues with the .22 I have, which is now relagated to Paperweight status, also. If I don't hear anything, then Sportsman's Guide is getting an earful tomorrow morning. We really shouldn't have to be going thru this. A little tinkering is one thing, but doing Aim Sports in field R&D for them, free of charge, is unacceptable.

Agreed. If changing a few o rings produced a working gun, though I shouldn't have to, I was willing. But to receive a gun that didn't work out the box and something more than simple o rings is unacceptable. Now to not have email response to my problem tells me they are overwhelmed with returns from a gun that was never ready for the market. Just think these guys were selling how other new products , parts, and other places to buy where soon to come. at the same time their first gun was failing at an alarming rate.

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More DAR bad luck

Author Topic: More DAR bad luck (Read 20363 times))