Another Daisy x53 rebuild
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Another Daisy x53 rebuild
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Topic: Another Daisy x53 rebuild (Read 515 times - 1 votes)
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threesuns
Sharp Shooter
Posts: 644
yes
Real Name: Timothy
Another Daisy x53 rebuild
«
on:
March 01, 2024, 08:45:08 PM »
Why will this one be any different?
It might not.
But I’ve already started
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USA, NY, Buffalo
threesuns
Sharp Shooter
Posts: 644
yes
Real Name: Timothy
Re: Another Daisy x53 rebuild
«
Reply #1 on:
March 02, 2024, 04:01:01 PM »
There I go getting ahead of myself again. That photo is a self head-spacing piston I have been think about since my 1rst attempts at modding/rebuilding an x53 (
https://www.gatewaytoairguns.org/GTA/index.php?topic=210295.0
)
So, let me go back … Acquired another 853, older, not an 853c, but a single shot with a MC stock (mostly wanted to try the MC stock) and the $75 price tag made it that much more appealing. After a superficial cleaning, a couple drops of oil on the pump and dry fires, RWS - Meisterkugeln’s cronied at 470.6, 472.7 & 472.2.
Not too bad. Shoots within spec … BUT … if I learned anything from my 1rst go round. The one thing the x53 series needs is a probe O-ring. And that was the very first thing to do! Just like last time, I marked the probe, to cut a groove for an 003 O-ring. New crony measurements with RWS - Meisterkugeln’s 494.7, 496.8 & 495.2.
I will be doing the 888 trigger mod and more but am waiting on parts.
Logged
USA, NY, Buffalo
threesuns
Sharp Shooter
Posts: 644
yes
Real Name: Timothy
Re: Another Daisy x53 rebuild
«
Reply #2 on:
March 03, 2024, 07:01:25 PM »
After my first mod attempts, and verifying significant fps gains with a simple O-ring mod post valve, has got me thinking. With roughly a 4:1 ratio between swept volume and barrel volume, is the x53 similar to a springer? in that the max fps is realized in only the first few inches of barrel and after that, the pellet is merely coating along until exiting the barrel?
I have been scouring the www. but am not finding an answer. Hoping others have pondered this as well.
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USA, NY, Buffalo
threesuns
Sharp Shooter
Posts: 644
yes
Real Name: Timothy
Re: Another Daisy x53 rebuild
«
Reply #3 on:
March 14, 2024, 10:56:59 PM »
I was invited back to the Country Club early for grounds cleanup but have still been working on my x53 build.
I have reworked some of the 888 trigger parts because I just couldn’t get excited by how little adjustment there really is with the stock components. As a PLUS the trigger guard is already drilled even slightly off set so I really didn’t need to trim the locating post on the casting.
With a short adjustment screw I barely trimmed the trigger and lock, just enough to allow a single stage or short two stage feel (my preference).
The sear … that was reworked. When cocked the front of the sear rest on the hammer, while the contact surface is slightly trimmed for less physical engagement. Just before breaking the front of the sear is flush with the hammer channel and fully cleared for the shot.
After everything cleaned, polished, and lubed, even with the factory springs, trigger pull is just about 2lbs as best I can measure.
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USA, NY, Buffalo
threesuns
Sharp Shooter
Posts: 644
yes
Real Name: Timothy
Re: Another Daisy x53 rebuild
«
Reply #4 on:
March 16, 2024, 04:54:17 PM »
Today I happened upon a 19 inch length of straw .177 barrel from ? The OD was only .010 smaller than the breech end of an original x53 barrel. I added a flat to allow it to slide into the x53 action, opened the lead for easier loading incase of any offset, and secured it with a set screw.
Next I shot 3 Meisterkugelns, lopped off an inch and repeated the process, till I got to 13 inches of barrel.
19 avg 439.8fps, 18 avg 438fps, 17 avg 434.4fps, 16 avg 429.8fps, 15 avg 427.2fps, 14 avg 421.3fps, 13 avg 416.7fps
Extrapolate from the data what you want. I found it interesting.
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USA, NY, Buffalo
threesuns
Sharp Shooter
Posts: 644
yes
Real Name: Timothy
Re: Another Daisy x53 rebuild
«
Reply #5 on:
March 18, 2024, 10:03:46 AM »
Got the call to stay home, due to poor weather conditions, making it a good day to play some more with the x53.
Check it out - a crosman 13xx poppet stem is only .001 larger than the x53 poppet stem. Could it be a cheap and easy way to take up additional valve volume, increasing the start pressure and netting a couple xtra fps?
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USA, NY, Buffalo
threesuns
Sharp Shooter
Posts: 644
yes
Real Name: Timothy
Re: Another Daisy x53 rebuild
«
Reply #6 on:
March 19, 2024, 10:26:20 PM »
It works! Though I didn’t realize the same or even close to the same results as adding the probe O-ring. I would like to see 6fpe but don’t think its there.
I need more air. But how to mod the x53?
Thinking about something similar to a Webley Alecto pistol. A SSP, plus 2 or even 3 pumps. No need for a relief valve, my fab’d piston, is a gas spring that can compress, and store excess pressure in the comp tube.
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USA, NY, Buffalo
threesuns
Sharp Shooter
Posts: 644
yes
Real Name: Timothy
Re: Another Daisy x53 rebuild
«
Reply #7 on:
March 20, 2024, 09:54:16 PM »
Getting ready to take this build to the next level. I have a 888 valve and everything from the x53 receiver, trigger cover and associated components fit the 888 valve and vise versa.
However getting inside the 888 valve won’t be as easy.
Logged
USA, NY, Buffalo
threesuns
Sharp Shooter
Posts: 644
yes
Real Name: Timothy
Re: Another Daisy x53 rebuild
«
Reply #8 on:
March 21, 2024, 08:36:21 AM »
Success. Measure 12X’s drill once and get lucky! Pin drove out easily. Adapter looks to be a standard 5/8 CO2 thread.
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USA, NY, Buffalo
lillysdad621
GTA Senior Contributor
Posts: 3537
Re: Another Daisy x53 rebuild
«
Reply #9 on:
March 21, 2024, 10:57:45 PM »
following (crunch, crunch... need more salt on my pop corn...)
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Georgia
threesuns
Sharp Shooter
Posts: 644
yes
Real Name: Timothy
Re: Another Daisy x53 rebuild
«
Reply #10 on:
March 22, 2024, 10:55:46 AM »
I think my wife is getting jealous of this daisy character, I have been spending so much time with this week. However I am now stuck waiting for a part.
The x53 is stripped down and everything under the trigger cover (all my modded trigger parts) including the probe with O-ring and even the lever latch fit like a glove. The 888 casting has been modded and an O-ring groove added. A set screw secures the LW barrel. It would take me too long trying to mod the Daisy CO adapter, since it is made from steel, so I am waiting on a WRCO2-230 aluminum adapter that will become my valve face and house my check valve.
The valve throats appear identical, and I like the more traditional 888 valve body configuration. I can focus the pressure around the poppet rather than vertically in channels 180* each side of the poppet.
I will have to make a check valve, won’t have alotta room, and have very limited tooling (read as a drill press and small wood lathe) I am open to suggestions. Current thinking is something involving an O-ring.
«
Last Edit: March 22, 2024, 11:04:39 AM by threesuns
»
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USA, NY, Buffalo
threesuns
Sharp Shooter
Posts: 644
yes
Real Name: Timothy
Re: Another Daisy x53 rebuild
«
Reply #11 on:
March 23, 2024, 10:43:01 AM »
Since waiting on a part, I thought it might be good to clean up the 888 receiver. If this should ever leave my possession I figured it best to leave any future owner knowing that this is NOT a standard Daisy.
All model and serial number info has been removed, casting seams smoothed and a fresh coat of Krylon Satin Black applied.
Logged
USA, NY, Buffalo
threesuns
Sharp Shooter
Posts: 644
yes
Real Name: Timothy
Re: Another Daisy x53 rebuild
«
Reply #12 on:
March 23, 2024, 11:05:02 PM »
Here’s the low down on my modified pump in the opening post. 2 inches of the x53 pump was cut out and replaced with a section of 856 tube and the 856 pump mod’d for 3 O-rings to seal the piston.
Please correct me if I wrong but seems to me, pressure should rise faster in the smaller volume of the pump piston, than the larger primary comp tube. So … self regulating, in that once max pressure is reach in the valve, the piston compresses storing any excess pressure in the main tube outside the valve, and if the lever is actuated after that, the pressure simply escapes back out the inlet, making it impossible to over pressurize the system.
I do have reservations: 1) how much or how little pressure in the piston will be required and 2) if the piston volume is sufficient. Perhaps only 1 will need to be changed to make it work.
«
Last Edit: March 23, 2024, 11:10:15 PM by threesuns
»
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USA, NY, Buffalo
threesuns
Sharp Shooter
Posts: 644
yes
Real Name: Timothy
Re: Another Daisy x53 rebuild
«
Reply #13 on:
March 25, 2024, 05:37:18 PM »
Aluminum CO2 adapter arrive today. I’m whittling away at it.
Ordered some parts from Daisy as well:
[134608-000] 853 SPRING HAMMER 1 $ .50
[153518-100] 753 853 FRAME PAINTED 1 $ 5.50
[154416-000] 853 PUMP TUBE 1 $ 4.00
[167939-000] 853 LEVER ASSEMBLY 1 $ 11.00
169629-K00] O-RING & VALVE GROUP-853 2 $ 2.50 / $ 5.00
Logged
USA, NY, Buffalo
threesuns
Sharp Shooter
Posts: 644
yes
Real Name: Timothy
Re: Another Daisy x53 rebuild
«
Reply #14 on:
March 25, 2024, 09:08:00 PM »
Not much left of the original CO2 adapter. Mostly I needed the 5/8x18unf male end & enough for a flange. Once nearly fit, I drilled and tap’d, 1/8npt, locktite’d in a foster fill and cut it off.
Forgot to account for the xtra 1/8 inch of flange, when I prepped the valve. Oops. Won’t an issue with my gas piston though.
Logged
USA, NY, Buffalo
johnrogers59
Shooter
Posts: 3
yes
Real Name: John
Re: Another Daisy x53 rebuild
«
Reply #15 on:
March 26, 2024, 09:45:42 PM »
Hello Timothy (threesuns),
I am a brand-new member to this group.
I have spent a few days reading all the Daisy x53 posts. I have been impressed with both your knowledge and gunsmithing skills.
I have an old 853 I got back in 1988 and I just recently got it out of the basement and started shooting it again.
I had not shot it in over 35 years. I have resealed and tuned it with most of the MODS I found on this forum. I am pleased with the accuracy of the rifle and the trigger is breaking consistently around 1lb 14 oz. It is very smooth and crisp after the MODS.
I read that you had done some MODS in regard to the pellet probe. It sounded like you added an 0-ring to the tip, so that it seals in the chamber of the rifle.
Is this correct, and if so, I was wondering if you could elaborate on the size of O-ring you used and the width and depth of the groove you made on the probe.
I have experimented with a 4.5mm O-ring that is 1.5mm thick and I did a mockup using a 4.5mm wooden dowel and a piece of 3/16 aluminum tubing to mimic the barrel chamber.
It seems to seal into the chamber with a snug fit.
Am I on the right track? Any insight you could provide would be great. I don't think I saw where you mentioned and FPS gains.
thank you in advance,
John Rogers
Logged
USA, MO, Florissant
"Gun Control requires concentration and a steady hand"
Daisy 853 (ARMY issue 1988)
Gamo Magnum Swarm 10x gen3i .22
Daisy Red Ryder (Christmas present 1966)
Crosman Powermaster 760 (Christmas 1970)
threesuns
Sharp Shooter
Posts: 644
yes
Real Name: Timothy
Re: Another Daisy x53 rebuild
«
Reply #16 on:
March 26, 2024, 11:36:17 PM »
John, welcom to The GTA. It sounds like you are headed in the right direction. The 003 O-ring I used is 1/16" ID, 3/16" OD, 1/16" Width. It is the O-ring Crosman uses on their .177 probes.
I mark the probe when fully closed and then cut the groove in between there and the tapered tip. Go slow, it’s only plastic and a sharp blade will cut easily. I never measure width, just let the blade do its thing and set my calipers for just larger than the O-ring ID and check often.
Logged
USA, NY, Buffalo
threesuns
Sharp Shooter
Posts: 644
yes
Real Name: Timothy
Re: Another Daisy x53 rebuild
«
Reply #17 on:
March 27, 2024, 09:50:18 PM »
Couple adjustment have had to be made over the last couple days.
First was fitment of my modified piston to the x53 frame, completed. 2nd issue is once fitted I’m not able to develop adequate pressure and need 2 pumps to get a pellet to exit the barrel.
In the interest if keeping this project moving alone, I’m shift gears to working with the Daisy piston. Had to shorten it 1/8 inch, and relocate the O-ring groove. Just waiting on a full cure of the epoxy.
«
Last Edit: March 27, 2024, 10:07:28 PM by threesuns
»
Logged
USA, NY, Buffalo
johnrogers59
Shooter
Posts: 3
yes
Real Name: John
Re: Another Daisy x53 rebuild
«
Reply #18 on:
March 28, 2024, 01:38:19 AM »
Thank you, Timothy,
I am waiting on a new chronograph to arrive before I do the probe MOD. I would like to know what king of gains (if any) I will realize.
I am following your current project and am excited to see how it ends.
John
Logged
USA, MO, Florissant
"Gun Control requires concentration and a steady hand"
Daisy 853 (ARMY issue 1988)
Gamo Magnum Swarm 10x gen3i .22
Daisy Red Ryder (Christmas present 1966)
Crosman Powermaster 760 (Christmas 1970)
threesuns
Sharp Shooter
Posts: 644
yes
Real Name: Timothy
Re: Another Daisy x53 rebuild
«
Reply #19 on:
March 30, 2024, 01:40:16 PM »
Making headway on my x53 multi-pump mod.
1) I’m not sure what possessed me to duplicate the 888 CO adapter’s valve volume, and had to make a reducer to get back on track.
2) If I were a machinist, perhaps I could have gotten away with just 2 O-rings. Initially thought I had a bad check valve seal, but was actually leaking past the threads and orange O-ring back into the compression tube. Added a 3rd O-ring to seal the valve.
3) Reworked the valve spring to fit the check valve. It was too strong and I was retaining air with only 2 pumps. Even shortening it didn’t help. An xtra trigger spring proved to be just what I needed.
4) reworked the comp tube and added a 1/8 inch spacer to max out the swept volume. Notice my reworked valve SxS with the stock 853 valve.
What kind of fps numbers am I getting? All results with Meisterkugeln pellets
1 pump - 509.2, 508.3, 506.2, 507.5 and 505.3
2 pumps - 580.8, 585.4, 577.9, 580.4 and 576
note: I had to open the lever quickly to seat the check valve, otherwise velocity was much lower and not as consistent. Hopefully it will settle in and will become a none issue.
3 pumps - 600.3 + air remaining,
596.5 + 1 pump 581.7(no air remaining)
599.7 + 1 pump 578.4
602.4 + 1 pump 575.5
599.0 + 1 pump 580.5
«
Last Edit: March 30, 2024, 02:35:11 PM by threesuns
»
Logged
USA, NY, Buffalo
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Another Daisy x53 rebuild