Hatsan 95 Quattro Trigger

[Ronno6]

I reassembled a 95QE Vortex after converting to a Crodman NP2 gas spring.
During reassembly I TRIED to keep the pins in the trigger assy from falling out, but............
One that did was the trigger pivot pin.
I just reinstalled it but missed one hairspring detail.
The 595 Quattro trigger has a part ahead of the trigger that I call a "pork chop."
I don't exactly know what it does or how it does it, but it is held in position bu a torsion spring about the size of a hair......
One end hooks into the pork chop, the other (so I have gathered) needs to be positioned under the trigger pivot pin (under when the assembly is on its back)
Otherwise, the trigger will not latch

Ask me how I now....

The pork chop is not depicted on mikeyb's avatar.....

[mikeyb]

Not needed to show basic trigger operation. Neither are the springs.

AFAIK the "porkchop" seems to be some kind of impact/bump safety so sear levers can't move to fire rifle unless trigger is rotated towards firing.

https://www.gatewaytoairguns.org/GTA/index.php?action=media;sa=media;in=7820;preview

https://www.gatewaytoairguns.org/GTA/index.php?action=media;sa=media;in=7479;preview

If the porkchop spring is in the wrong location it won't operate as intended. If the porkchop doesn't rotate when the trigger is pulled it won't allow that "green" sear lever to move to fire.
Try reassembling trigger again ;-)

Edit: I think this condition (porkchop spring in wrong location) may be one of the primary reasons the trigger blade casting gets BROKEN. You can pull REALLY HARD on the trigger blade trying to fire the rifle. At some point frustration sets in, because we KNOW the trigger SHOULD work, and we pull hard enough to snap the cast pot-metal trigger blade.

[Ronno6]

Before discovering the correct location of the torsion spring leg under the trigger pivot pin,
the sear wouldn't latch.....

All working fine now, and maybe a tad wiser for the experience.

I wish that Hatsan used pivot pins with C-clips on them to prevent the pins from falling out.........
That's save a bunch of problems..for me anyway..

[Ronno6]

When out of position, the pork chop prevents the tertiary sear from dropping in front of the intermediate sear, thus keeping the intermediate sear from catching the primary sear and latching the piston..............whew...

[mikeyb]

When out of position, the pork chop prevents the tertiary sear from dropping in front of the intermediate sear, thus keeping the intermediate sear from catching the primary sear and latching the piston..............whew...

I believe that is another valid problem when the "porkchop" gets out of position.

I just tested one of my Quattro trigger groups by completely removing the porkchop and its spring. The trigger group worked normally as expected. I DON'T advise people remove these parts because I'm not 100% certain it is safe. My current theory that it is only a "bump" safety may be missing some other critical function. What I do know is that Hatsan added it to the trigger group to solve some problem.

Edit: When working on my Hatsans with Quattro trigger groups i put small "tight fitting" o-rings on the pins to keep them from falling out. I have at least one rifle where I left the o-rings in-place after assembly. So far the o-rings have not jumped off the pins and caused problems, but I cannot guarantee that will never happen.

https://www.gatewaytoairguns.org/GTA/index.php?action=media;sa=media;in=7481;preview

[19Sheridan57]

   Some trigger groups have always been seen as too complicated to me. 

[H95Kidd]

When out of position, the pork chop prevents the tertiary sear from dropping in front of the intermediate sear, thus keeping the intermediate sear from catching the primary sear and latching the piston..............whew...

I believe that is another valid problem when the "porkchop" gets out of position.

I just tested one of my Quattro trigger groups by completely removing the porkchop and its spring. The trigger group worked normally as expected. I DON'T advise people remove these parts because I'm not 100% certain it is safe. My current theory that it is only a "bump" safety may be missing some other critical function. What I do know is that Hatsan added it to the trigger group to solve some problem.

Edit: When working on my Hatsans with Quattro trigger groups i put small "tight fitting" o-rings on the pins to keep them from falling out. I have at least one rifle where I left the o-rings in-place after assembly. So far the o-rings have not jumped off the pins and caused problems, but I cannot guarantee that will never happen.

https://www.gatewaytoairguns.org/GTA/index.php?action=media;sa=media;in=7481;preview

Mikeyb: That's a great idea! Taking it a step further, if one has access to a lathe, what about turning a tiny groove in the pins to accept e-clips? Now THAT would be cool. No more pins falling out! Hmmnnn...

[Ronno6]

When out of position, the pork chop prevents the tertiary sear from dropping in front of the intermediate sear, thus keeping the intermediate sear from catching the primary sear and latching the piston..............whew...

I believe that is another valid problem when the "porkchop" gets out of position.

I just tested one of my Quattro trigger groups by completely removing the porkchop and its spring. The trigger group worked normally as expected. I DON'T advise people remove these parts because I'm not 100% certain it is safe. My current theory that it is only a "bump" safety may be missing some other critical function. What I do know is that Hatsan added it to the trigger group to solve some problem.

Edit: When working on my Hatsans with Quattro trigger groups i put small "tight fitting" o-rings on the pins to keep them from falling out. I have at least one rifle where I left the o-rings in-place after assembly. So far the o-rings have not jumped off the pins and caused problems, but I cannot guarantee that will never happen.

https://www.gatewaytoairguns.org/GTA/index.php?action=media;sa=media;in=7481;preview

Mikeyb: That's a great idea! Taking it a step further, if one has access to a lathe, what about turning a tiny groove in the pins to accept e-clips? Now THAT would be cool. No more pins falling out! Hmmnnn...

That had been my notion.
I need to find the correct Thinbit insert to turn such a tiny groove.
As well as the correct size collet.
I believe I have the E-clipd and some 3mm pins if that is the correct dia..

[Novagun]

I have just had my Hatsan 99 in bits   The barrell latch lever broke so I had to make a new one
As usual the quattro trigger fell apart and I had to reassemble it. I have had it appart several times and have not noticed the spring you talk of and it has worked uo until now  despite assembling with the trigger cocked the sear will not latch the piston i hope it trigger adjustment.

[Ronno6]

Refer to this link from mikeyb reply #1 above:  https://www.gatewaytoairguns.org/GTA/index.php?action=media;sa=media;in=7820;preview

If your Quattro Trigger has it, the part that I refer to as a "pork chop" is the white cam immediately in front of the trigger.
On the reverse side from the picture there should be a very fine wire torsion spring, with a hook on one leg that hooks thru the little hole in the pork chop furthest from the trigger.
The other leg is positioned under the trigger pivot pin,between the pin and the trigger body and is kinda tricky to get in the correct position.

My rifle would not latch when that spring leg was not in the right position.

[Ronno6]

How come the links in these posts don't work anymore??

[Whirligig]

Is there a particular "process" for assembling and disassembling the Quatro (and reassembling) the Quattro trigger in the factories?

Are other triggers given this attention (or less or more) on services such as YouTube?

There must be people who are experts with airgun triggers. Anyone to Google you might suggest?

-W

[Blowpipe Sam]

Is there a particular "process" for assembling and disassembling the Quatro (and reassembling) the Quattro trigger in the factories?

Are other triggers given this attention (or less or more) on services such as YouTube?

There must be people who are experts with airgun triggers. Anyone to Google you might suggest?

-W

I've watched several videos about tuning the Quattro.  None of them were great but they were helpful.  I got better advice from folks here on the forum.  Mikeyb has some good posts about the Quattro.  Very helpful.  I finally got the nerve to tear into one of mine.  Now I realize how easy they are to work on.  Not intimidated anymore.

[mikeyb]

How come the links in these posts don't work anymore??

Some of my gallery image links in posts got broken during (I think) the site "uprgrades" last year (?)
Pretty certain this happened to other member posts but I thought the links were "repaired" by some skilled software people.
I guess not all got repaired?
https://www.gatewaytoairguns.org/GTA/index.php?topic=210620.msg156480680#msg156480680
https://www.gatewaytoairguns.org/GTA/index.php?topic=211068.msg156486568#msg156486568


I found my gallery images were still there, just the links were broken.
I don't have admin rights to go back and edit old posts so I tried a workaround in this post.
Old broken link first and new image link next line.

Seems to work (in preview) for now... until the next site upgrade ;-)


https://www.gatewaytoairguns.org/GTA/index.php?action=media;sa=media;in=7820;preview




https://www.gatewaytoairguns.org/GTA/index.php?action=media;sa=media;in=7479;preview





https://www.gatewaytoairguns.org/GTA/index.php?action=media;sa=media;in=7481;preview

[Ronno6]

I got one now that is being difficult.
I am sure that I have it assembled correctly, but..........

It cocks and latches, it just won't release.
The trigger depresses the tertiary sear correctly.
The tertiary sear releases the secondary sear..........but.......
The primary sear does not move..............

I must not be holding my mouth right..........

[splitbeing]

Although not the quattro, I found cutting a coil at a time off the spring in my hatsan sortie trigger until it was just right to greatly improve that gun, the trigger parts were tricky to get back together but I got used to it.

[Ronno6]

OK.
Got it.......
It was an alignment broblem with the air spring........
I don't understand what "moved," but when I inserted the
forward pin, that went thru the pump tube, air spring and trigger, the trigger housing
would deform somehow and the sears would bind........
Once I "adjusted" the alignment thru these parts, all went together well and now works nicely!
Hard to argue with success.
As the engineers used to say, "The end justifies the means..."