Help installing a LA101 22lr Lumley Spring Kit

[KoalaGrundle]

Installed the Lumley trigger spring today. Seemed to go smoothly enough. Read this thread and followed this guide
https://highvelocityhuntingaustralia.co ... tructions/

I didn't install the reduced travel sear spring because I wasn't confident I would be able to get it back together again. Will leave that for an actual gunsmith
Unfortunately I don't have a torque screwdriver so the action screws are probably not set correctly.
I recorded a video of it so might get around to putting it on youtube one day

[in2anity]

Unfortunately I don't have a torque screwdriver so the action screws are probably not set correctly.

I wouldn't worry about that too much - mine went back together without a torque driver, and it still shoots sub moa at 50m even with pretty cheap ammo. Unless you're shooting benchrest with high quality ammo, in that particular rifle I doubt you'd be able to measure any change.

[John from Auburn]

Need a little help installing the spring in my lithgow hmr 17. Great picture in this discussion but would appreciate step by step instructions. Can someone please help
Thanks
John

[in2anity]

Need a little help installing the spring in my lithgow hmr 17. Great picture in this discussion but would appreciate step by step instructions. Can someone please help
Thanks
John

Back when i took those photos, i had always planned on writing up a proper guide as you a requesting. I just never got around to it . What part aren't you clear about?

[Insert random name]

thanks for rezzing this topic, just ordered the spring for my Lithgow .22 it only gets shot at the range so need every bit of help I can get and a lighter trigger is it.

[Blr243]

Sometimes when I pull stuff apart it can take me 2-3 frustrating cranky days before I get it back together properly but by then I’m an Xpert and hopefully won forget how it done

[John from Auburn]

I found one other place on the web with instructions butt pictures was not clear in identifying parts. If you match your pictures letters to the following procedure it would help. Removed circular clip. Remove trigger retaining pin. Loosen grub screw. Remove safety pin. Remove trigger spring and bolt release plunger. Thanks for all your help with this.

[in2anity]

Removed circular clip. I on my picture
Remove trigger retaining pin. F on my picture, this is the only step that requires a punch+small hammer. Loctite/nailpolish the side the retaining bur was knocked away
Loosen grub screw. E on my picture
Remove safety pin. A on my picture

(remove trigger)

Remove trigger spring and bolt release plunger. From memory (it's been a while), I think the head of the bolt release plunger is obscured by the safety leaver in my photos. From memory I have a feeling the base of the plunger might be H but I'm not 100% sure. Whether it's H or not, once you lift the safety leaver out, you should easily be able to identify the head of the bolt release plunger akin to this image:

trigger spring and bolt release plunger.

plungerSpring.jpg (136.72 KiB) Viewed 8702 times

This last step will become clear, once you get to it.

Please correct me where I'm wrong, it's been a while since I've done one, or add another photo clarifying once completed. It'd be nice to put this guide to bed, once and for all.

In2.

[John from Auburn]

Thank you so much for the help. I will give it a go next week.

[hutchley]

Thanks for posting this. I'm just about to embark on the trigger spring replacement, but also found the part labelling on the spring suppliers website impossible to read !

The standard trigger weight as purchased is ludicrously heavy - definitely the limitation on accuracy with my 22LR LA101. Still getting used to the PARD NV008 I have mounted on it for bunnies at night, even on the lowest brightness setting you immediately lose your night vision in the eye you use for sighting, but not through the other. A very weird sensation !

[John from Auburn]

Did not get very far on replacing the spring on my 17hmr 101 crossover. Remove the kimdye (blue stuff).but could not remove the bolt that attaches the trigger housing to the barrel. Applied 50 ft pounds but would not break free. Lumley who I purchased the spring kit from suggested applying heat. Small torch thinking their might be tread locker. Kind of reluctant to try this. Has anyone else had this issue?

[John from Auburn]

Did not get very far on replacing the spring on my 17hmr 101 crossover. Remove the kimdye (blue stuff).but could not remove the bolt that attaches the trigger housing to the barrel. Applied 50 ft pounds but would not break free. Lumley who I purchased the spring kit from suggested applying heat. Small torch thinking their might be tread locker. Kind of reluctant to try this. Has anyone else had this issue?

[in2anity]

Mr Auburn I used a decent quality allen key for the trigger housing screw. Remember it being quite tight. A bit of heat wouldn’t go astray however.

[John from Auburn]

Used a soldering iron to heat the screw for 10 minutes. That worked. Followed instructions above. My trigger now is a constant 1.9 pounds . THANK YOU

[in2anity]

John, was the head of the bolt release plunger is obscured by the safety leaver?

[hutchley]

Just finished mine - thanks to everyone above for useful pics and helpful hints.

Trickiest part was getting that blue gunk off the bolt head that holds the trigger assembly on. I found that a cotton bud moistened with acetone makes the stuff let go, then you can get a hex key to seat properly. It is VERY tight to get the bolt out, but it does let go eventually. If yours resists all reasonable force, maybe Lithgow accidentally got some of the blue gunk on the bolt threads?

Just tested the trigger, and WOW, what a difference. A sensible weight, but still safe - more like what I'm used to on other guns. I can understand Lithgow not wanting to set them up this light from the factory, but somewhere around 2 - 2.5 pounds (rather than 4+) would have been a good compromise. First decent weather I'll head out with some RWS subs and see what this does for my grouping.