TargetTalk

Hi!

One week ago I bought a Steyr Evo 10 mechanical trigger.
I can't adjust the second stage trigger pressure any lower than around 250 gram.

I have followed the user manual instructions (turning screw 4 anticlockwise) but it does not help.
When it reaches the outer end stop the pressure is still around 250 gram.

What is the best way to fix this issue?
Should I exchange the pressure spring (54) for a softer one or maybe grind the outside of the spring to make it softer,
or maybe shorten it?

All ideas welcome. Thank you in advance.

Best regards,
Carl Bergman
Närpes, FINLAND

How low would you want it to go? The gun is made for ISSF shooting / 500g so it's not a surprise if it wouldn't go any lower. You can try to reduce 1st stage also to get it even lower.

This is all about the second stage.

I already have a total of over 500g (first stage 280g + second stage 250g).
I want to change the distribution to something like first stage 380g + second stage 150g.
Adjusting first stage works fine but not adjusting the second stage.

Carl

I suppose it is possible that it has the wrong spring installed in it.

It will help if you shorten the first stage travel. The more travel it has, that spring is still compressing into the second stage somewhat.

You also want to make sure your over travel has clearance and is not affecting the second stage weight.

Lastly, if you bought it used, I would check the sear engagement, AKA the "don't touch" screw. Cock the gun and turn it in slowly until it releases. Then back out 60-70 degrees.

If none of that works, yes I would procure a new spring. When you have the sear out, I grease its contact edges with moly grease. My view is that it keeps sear wear down and makes the trigger just work against springs, and not friction.

Carl,
First disassemble the entire trigger assembly, check for integrity, clean and install correctly. After the then make basic adjustments according to the procedure. https://www.targettalk.org/viewtopic.ph ... 74#p291557 (DavidM has been described here before.) You can only change the spring mechanically if nothing helps. It is best to order a new original spring beforehand. These problems are often caused by coarse mechanical dirt or part of a damaged trigger pressure bolts.
P.S. If you do not understand the arrangement and construction of the trigger, they should rather entrust the work to an experienced specialist or the producer service .

pbrejsa wrote: ↑Mon Jan 10, 2022 12:24 pm Carl,
First disassemble the entire trigger assembly, check for integrity, clean and install correctly. After the then make basic adjustments according to the procedure. https://www.targettalk.org/viewtopic.ph ... 74#p291557 (DavidM has been described here before.) You can only change the spring mechanically if nothing helps. It is best to order a new original spring beforehand. These problems are often caused by coarse mechanical dirt or part of a damaged trigger pressure bolts.
P.S. If you do not understand the arrangement and construction of the trigger, they should rather entrust the work to an experienced specialist or the producer service .

While I have disassembled everything else on the LP series guns, I have yet to remove the pin that goes through the bearings on the trigger pivot. How have you gone about that? I have never tapped on the inner race of bearings that were captive on the outer race due to fear of pitting.

To the OP: When you adjusted the second stage, did turning the screw have any affect? Maybe the spring isn't installed correctly.

Check that the trigger stop screw is not contacting the frame at release (page 31 manual- screw 1).
Wind screw 1 anti-clockwise 1 turn and re- check the trigger.
Also, have you touched screw 5 (sear engagement) normally factory set. If this is set as too small an
engagement, it will require a heavy 2nd stage weight to retain engagement.

Thank you all for good advice! Also thanks to Steyr factory for prompt reply and excellent customer service!

I collected the info that I found regarding this issue (see below).
I followed Procedure 1 and reached 1.stage=380g and 2.stage =140g.
I am not making any recommendations myself, just telling what worked for me.

Carl

------

EVO 10 Trigger

Trigger stop (nr 1)
Too fine adjustment of the trigger stop may cause inconsistent trigger weight and release. (Evo user manual)
Make sure your over travel has clearance and is not affecting the second stage weight. (brent375hh)

Check that the trigger stop screw is not contacting the frame at release (page 31 manual- screw 1).
Wind screw 1 anti-clockwise 1 turn and re- check the trigger. (David M)



First stage:
It will help if you shorten the first stage travel. The more travel it has, that spring is still compressing into the second stage somewhat. (brent375hh)



Sear screw (nr 5 red paint seal - the Don´t touch screw):
Cock the gun and turn it in slowly until it releases. Then back out 60-70 degrees. (brent375hh)

Also, have you touched screw 5 (sear engagement) normally factory set. If this is set as too small an
engagement, it will require a heavy 2nd stage weight to retain engagement. (David M)


New spring:
If none of that works, yes I would procure a new spring. When you have the sear out, I grease its contact edges with moly grease. My view is that it keeps sear wear down and makes the trigger just work against springs, and not friction. (brent375hh)



Procedure 1 (David M):
Total reset....
Turn scew 1 anticlockwise to allow trigger after travel.
turn screw 3 to allow 3-5mm travel at the centre of trigger blade.
turn screw 2 to give approx. 300g of first stage weight.
turn screw 4 to give approx. 200g second stage weight.
These are the rough settings.

Now to adjust the sear. (the don't touch screw)
you need 1/8 to 1/2 screw engagement of the sear. The amount of engagement also acts like a second stage travel.
1/8 of a turn will be a break like glass setting and a 1/2 turn a slight roll off.
The lighter you set the second stage weight (screw 4) the more sear engagement you need for reliable operation.
With the pistol cocked slowly turn 5 in until the pistol fires (sear releases) this is the break point. Note the screw head slot angle.
Now back off screw 5 a 1/4 to 1/3 of a turn, re-cock and try the trigger feel. Feel for the second stage travel.
Adjust a very small amount as required but not less than 1/8 turn from break point. (Sear set)

Slowly wind in the trigger stop (screw 1) until the pistol won't fire, then back off 1/2 turn. (Over travel set)
Adjust overall trigger travel to your liking.(screw 3). (trigger travel set)
Now fine tune the second stage weight for your feel but not less than 100g. (150- 200g is good).
Adjust the first stage weight to lift +500g.
If feel and weight is right ,lock screw 5 with nail polish or a small dab of super glue.



Procedure 2 ( gimgim) :
First I fully unscrewed (I), (II), and (III). This should get the longest first stage with the minimum weight possible.
Verified than the pistol was still firing like if it didn't have a first stage, and without the tip of the screw (III) touching anything.
At that point, the only possibility seemed to be the sear not being engaged well enough and the pistol firing not because the tip of (III) pushes the lever, but because the hold at the opposite side of it is lifted.

I unscrewed (V), the screw Steyr says shouldn't be adjusted, ever :-) by a tiny fraction (red paint seal was still there, but it wasn't securing the screw) and then adjusted second stage weight (IV), and the first stage length and weight.

Glad you got to where you wanted to be.

I like to arrest the trigger movement as soon as it breaks.
Having too much overtravel will show up as sight movement for me.