Hatsan mod 25 supercharger needs trigger put back together

[coaxialtasko]

I have a Hatsan Mod 25 Supercharger .177 spring piston air pistol. About 1.5 yrs. ago I adjusted the trigger adjustment screws to much and they flew out when next shot.It wouldn't lock up with the sear after that.I figured the only way to fix it was to take out trigger and put it back together.I found the only info on the web is th tw chambers parts diagram.I thought I was in business ,but after I took the trigger apart I realized the parts don't look the same in the diagram,Fudge! If someone on this forum can't guide me through this,does anyone know of an airgunsmith that can put this back together?I can't find anyone that woks on these either and I'm so frustrated at the lack of info about airgun diagrams.I still have 3 more airguns to fix after this. I have two little springs that were inside(one is attached to a part) and 3 other parts,safety ,and the trigger.

[Privateer]

http://www.mediafire.com/download/oe5jm5t56it1jd2/MOD25-SuperCharger.pdf

I've got one here that I need to replace a broken sear spring in.
I'm sure I could take some pics and guide you through it.

Looking at the 2nd picture? That spring hanging on the sear looks broken.
Can you post a closer look?

[coaxialtasko]

is this it?so do I have 2 springs or one broken one?

[Privateer]

Yep. That spring is broken. Seems to be a common problem.
HatsanUSA will not sell that spring and wants you to send the Gun to them plus $25 or so to fix it.
Let me get this one taken apart and I'll let you know if the springs I got work.
If they do I have an extra.

You will need to have a spring compressor as the whole trigger unit needs removed from the AG.
It has a hooked part that the spring and such holds in place.
I'd be amazed if you could get those 2 sears with spring back in place without removeing the whole thing.

[Privateer]

Here's the AG clamped for removeing the trigger stuff.
Remove the front pin near the barrel first. Then the pin near the rear cap.
Release the clamp and you can take the whole trigger housing out.


you end up with this.


Here's the same broken spring.


The ones I have are to large. I'll need to go to a backup plan.
The backup plan is to make my own spring. It's not that hard to make the springs.
It's getting them tempered that is the hardest part. The kitchen oven comes in handy.
The hard part is ducking the Wife when she finds out what I'm doing!

I find it a bit crazy that Hatsan will not sell that spring.
I also find it is a proven failure point and should be addressed!
I was thinking of buying a new one but this issue has stopped that thought untill the springs are made available.

[Privateer]

This is the position of the 2 sears as they would be in a cocked position.
Pay special attention to the holes circled in blue. That's where the sear spring attaches and the edges were VERY rough on Sear 1.
I deburred, beveled, and then polished the holes to stop any sawing action.
The broken spring and the spring I'm going to test are in the upper blue circle.



The spring in place on the sears.



And installed. Get sear 2 in place first. The tape holds the sear 2 pin in place. It will fall out on you at the worst moment!
This is the sears in the cocked position. I also added 2 thin shims to Sear 1. One on each side to take up the slop.

[cherokeesteve]

Being the owner of 2 superchargers I've been fortunate enough to not have the sear spring be an issue for me but it's good to know this post is here with the great pictures. Just wanted to say thanks, guys.

[Privateer]

Glad to be of help.
 

Here's a shot of some springs.
The top one is the broken sear spring.
Under that is a Tippmann Sear or trigger spring. That is the one I'm trying first.
Under that is several springs found in an old printer in the basement.
Time to throw that thing away as I squeezed my last bit of money out of it I guess.
 

[coaxialtasko]

found a few companies that sell these little springs you justneed the sizes and I dont have a micrometer.

[AgentWD40_FL]

Thank you for a very helpful thread if my Supercharger ever needs work. 

[Sfttailrdr46]

  Thanks for the Pictures of the trigger assembly and removal process. I have the .177 and have wanted to disassemble and tune but was reluctant to attempt without a good diagram. thanks mission accomplished

[blackfocal]

I find it a bit crazy that Hatsan will not sell that spring.
I also find it is a proven failure point and should be addressed!
I was thinking of buying a new one but this issue has stopped that thought untill the springs are made available.

We have had this talk on here many times before... It does not so good that Hatsan won't sell you the part, they don't sell any triggers or parts. The reason that was brought up before was that its a liability thing. Say someone is trying to work on their trigger and gets parts from Hatsan and they install the parts wrongs which causes the trigger to fail and the person ends up shooting someone. Now Hatsan is on the hook for that, with them not sell triggers or the parts to them it takes that chance of getting sued away.Before it also gets said I will go ahead and rebuttal the topic of "well i know what I'm doing i use to be a (*insert some kind of mechanical job*) so taking apart airguns and because of all that they should sell me the parts" there are plenty of people that can say that and yet they don't need to be around guns from the start let alone working on them. In today's day and age we as a society here in the United States are what we call "Sue Happy" our society sues for the dumbest @$%^ I have ever seen or herd! I know that there are some companies out there that do sell the parts, and good for them! I hope that the situation never comes up where they sell parts to some garage tinker that ends up shooting himself or someone else and sues that company and renames it "joe shmoe's air gun emporium." So in my closing of this topic if you want that trigger fixed from Hatsan, you will spend the $25 and let them fix it for you the right way where you know its going to work right and they will test to make sure it works right. Or you can void your warranty and go find some part that could fail and hurt someone or yourself if it gets done wrong.

[coaxialtasko]

so should we not be allowed to work on our own vehicles anymore? There's always a potential lawsuit somewhere in the U.S.

[blackfocal]

so should we not be allowed to work on our own vehicles anymore? There's always a potential lawsuit somewhere in the U.S.

To be honest there are also people in this world that don't need to be working on cars. When it comes to people putting WD-40 on break pads to keep them from squeeking, they don't need to have a drivers license either!
Like I said we live in a "Sue happy" society so yes there always is the potential for a lawsuit. Hatsan is obviously trying to minimize their risk of for that lawsuit.

[Privateer]

HCAirgunner got the diagrams from Hatsan so a big thanks to him.
 

It's his SuperCharger I have. The compression tube was out of round near the back of the piston when not cocked.
That cause severe binding and scarring of both the piston and tube when cocking.
It also probably caused the failure of the cocking arm parts due to the extra stress.

HatsanUSA sold Christopher the piston, piston seal, and all cocking arm parts.
I bored the bent tube area and buttoned the piston. The area is behind where the piston seal rides and it works great now.
I was ready to ship it back to him when the Sear Spring failed.

Here's the washers I placed on sear 1 to take up the side to side slop. I made them out of ring crimp connectors so I can't tell you the size and such. I tested several before I found some real thin ones that worked perfect.


Remove the clips circled But be sure to keep pressure on the safety! Tape it down if nothing else. There's a tiny spring and ball under there.


Here's the ball and spring circled.


And the parts on a handy magnetic CC type thing. (Other side says Beware of Wife!  )


Last 3 pins removed and sear 3 is out. The circle is where I deburred the hole. It was rough and binding on it's pin. Also polished the pin and smoothed the area where the trigger screws touch.  There's a spring under Sear 3 in the houseing. Don't loose that.

[Privateer]

When putting the trigger assembly back in, place the sears in the cocked position.
Slide the assembly in place and put the front pin in to hold it while you do the compressor bit.
Once everything is in, pull the trigger to release the sears before you attempt to cock it!

Here's the SuperCharger all back together.


The Tippmann sear/trigger spring is working great so far. I've 30 shots through it with no issues.
Since I pulled the piston out to check the buttons and stuff I'll need to run pellets through it till the dieseling stops.
Then I'll clean it up and send it home.
 

[AgentWD40_FL]

Thanks to the photos and descriptions in this thread ..... I tore my .177 Supercharger down today.  No issues with it, and my trigger has been fine, but it seemed easy enough to do it. So, why not??

I was alittle surprised at the amount of spring tension .... my home built compressor did a great job, but there was alot more than my AirHawk I tore down a year ago.

I cleaned off all the factory paste where I could reach, and de-burred/buffed/polished the spring ends, and a spot or two on the tube.  I left the trigger alone, except to put a drop or two of secret sauce on pivot and contact points. Re-pasted the spring, ends and caps with a very good paste I got in a rebuild kit for my AirHawk. I suppose if there was any reason to tear the gun apart today, it was to relube it. My Airhawk used to have a big twang to it until I put this paste on the spring of that gun.  Its been fantastic ever since, and figured I could make the Supercharger as good too.

With alittle help from my wife as an extra set of hands, I got the spring compressed and dowel reinstalled. Got it all back together and gave the barrel a good cleaning. Fired off 20-25 pellets and she seems smooth as silk through the cocking process, and she's hitting where I aim it.  The barrel was real dirty with factory goop that I was lazy about cleaning the first time around. It took 12 q-tips before it came clean.

Removed the front philips screws and applied some blue loctite .... those buggers were constantly coming loose. I also shimmed these screws as they were bottoming out against the long pivot arm that runs down from the barrel, which was causing binding and difficulties in cocking.

Gonna let it sit overnight for the loctite to set, but tomorrow I'll put a session in till my eyes go buggered.

Sorry for the long wind ..... thanks to the above great posts!!

[HCAirgunner]

The Tippmann sear/trigger spring is working great so far. I've 30 shots through it with no issues.
Since I pulled the piston out to check the buttons and stuff I'll need to run pellets through it till the dieseling stops.
Then I'll clean it up and send it home.
 

I cannot wait to have my baby back! Thanks again for all your hard work!

[Privateer]

I cannot wait to have my baby back! Thanks again for all your hard work!

Thank You Chris, for trusting me enuff to send it to me. It was a challange and I can say I learned alot along the way.
Most people would have trashed the compression tube if not the whole thing.
I created a few new tools, had a blast shooting it, and made a new friend along the way.
 
I can't think of anything better then all that.

[HCAirgunner]

Wow, Holidays sure can be distracting! LOL I had totally forgotten about the Hatsan, until my wife heard a squirrel digging around on our roof this morning, and I whipped out the Diana P5 to go see if I had a good target.

(The squirrel was wise, and was not there when I arrived on the scene with the Diana.)

When ya gonna' ship the Hatsan home? No pressure, I am just excited about the prospect of shooting it again