Canjar Single Set Trigger Problem

[Redrover]

I recently got out a Canjar single set trigger I’ve had for decades, installed it, and found that it functions correctly unset, but it canl no longerbe set. Push the shoe forward and the center blade comes forward as it should, but there is only feeble ‘click’ sound and it does not latch. The trigger has had very little use, despite its age, and always used to work perfectly well, so nothing should be worn out.


I tried soaking and flushing it with lighter fluid, but this made no difference. It did look a bit dirty around where the shoe connects with the main trigger lever, so I removed the pin, detached the shoe, and gave all the surfaces I could reach a thorough clean. I did not remove the small ‘sear’ in the top of the shoe as I do not have a punch small enough, but it looked clean and moved freely under the pressure of the tiny coil spring acting on it. Once the parts were clean, I reassembled the mechanism, and found that it still does not set, and it does not make any sort of click sound now.


Has anybody else had this problem and knows how to fix it? Or can anybody direct me to some place where there is a diagram of the inner workings of the set shoe? I could probably figure things out myself if I could find such a diagram. I have searched and ‘Googled’ until I have nearly gone cross-eyed, and found numerous articles on how to ADJUST the trigger unit, but nothing relevant to my problem. Nor any diagrams of the ‘innards’ of the set shoe.


T I A

 

[Hal]

On the side of the trigger shoe is the weight adjustment screw .( for the "set" part of the trigger)
Back it off 1/8 th of a turn and try it.

Hal

 

[Redrover]

On the side of the trigger shoe is the weight adjustment screw .( for the "set" part of the trigger)
Back it off 1/8 th of a turn and try it.

Hal

Adjusting that weight adjustment screw both inwards and outwards was the first thing I tried when I became aware of the problem. Unfortunately it didn't make any difference.

 

[HonkinDonky]

Following along here, as I have a .219 Donaldson wasp with the exact same problem on it's canjar set trigger...

 

[Redrover]

Following along here, as I have a .219 Donaldson wasp with the exact same problem on it's canjar set trigger...

Interesting. Hopefully somebody will know the answer. If not, I guess I will have to improvise a punch less than 1/16inch diameter and try to completely disassemble the thing and hope it doesn't fly apart. If anything gets lost I'll be in real trouble! Then I'll have to hope that I can figure out what the problem is.

 

[Ggmac]

Interesting. Hopefully somebody will know the answer. If not, I guess I will have to improvise a punch less than 1/16inch diameter and try to completely disassemble the thing and hope it doesn't fly apart. If anything gets lost I'll be in real trouble! Then I'll have to hope that I can figure out what the problem is.

Do you test it with pressure on the sear ? The trip should set , as you know , I've had this problem and can't remember what I did but I know it was simple. Is there a small screw that holds the shoe on ? For some reason I think it has to do with the shoe attachment to the trigger assembly. I know this isn't much help and one thing I remember is trying to reassemble the set blade is tricky and that little spring is hard to find a replacement for. More after coffee.

 

[Johnny_V]

Here's the instruction sheet for the Canjar Trigger I recently posted.

http://forum.accurateshooter.com/threads/canjar-trigger-adjustment.3983849/

 

[Redrover]

Here's the instruction sheet for the Canjar Trigger I recently posted.

http://forum.accurateshooter.com/threads/canjar-trigger-adjustment.3983849/

Yes, I have seen that, thanks. The PDF file is essentially a copy of the factory instruction sheet I received with the trigger when I bought it in the late 1960s.

Unfortunately neither of them, nor any other write-ups I have found, address the problem HonkinDonkey and I are having. Other than to say the trigger should be returned to the factory if repairs are required - which is no help these days.

 

[Redrover]

Managed to fix the troublesome trigger. Dismantled the set shoe and found that there is only the centre blade and a tiny compression spring contained in it. There were traces of something - perhaps dried up bore solvent or similar that had somehow made its way in there - on the sides of the blade and on the slot that it fits into. This didn’t LOOK serious, and the blade rotated freely on its pivot pin, but I cleaned it off with 800 grit carborundum paper to be on the safe side. The upper part of the blade which engages with a notch in the bottom of the main trigger lever also looked quite clean, but I went over it with solvent and a bronze brush.


I could see re-assembly of the shoe being a bit tricky, with the holes for the pivot pin needing to be perfectly lined up and also having to ensure that the little coil spring didn’t go flying. So I made a ‘slave’ pin out of a 38mm x 1.6mm brad. Smoothed up the point of it, cut the head off it, chucked it in a drill and ran a piece of carborundum paper on it to make the diameter a close, but not tight fit in the holes. Got everything in place on the slave pin, then pushed it out with the proper pin. Then re-attached the set shoe to the main trigger lever.


It now functions perfectly. Goes to show how important it is to keep the innards of set triggers and other very light let-off weight triggers perfectly clean.

 

[HonkinDonky]

Great news! I'm working way up north in Alaska for another 4 weeks, but as soon as I get home and thaw myself out I'm going to check mine out and see if it's the same problem...