HW/Weihrauch HW35 reassembly help!

[Toolferone]

Ok, so I now have the replacement spring and am ready to put it all back together and I can not compress the new spring enough to get the back cap screwed in place. I have put the barrel back on and have the gun standing upright with the muzzle on the floor and I am trying to push the spring in with the back cap and I can not get the spring all the way in to start screwing the back cap in place. I emailed Airguns of Arizona and have confirmed that I have the correct replacement spring from them. I have not seen a good video on YouTube showing that final part.

HELP! What am I missing? Is there some kind of jig I need to make. I am open to all safe suggestions. I am pretty good mechanically.

 

[Sqwirl57]

You have to wiggle it a bit sometimes to make sure the latch rod drops into the guide

 

[bustachip]

It depends on how close you are to getting the threads started on the end cap, as to whether it’s doable by hand. I had to build a spring compressor for my 97K when trying to install a hornet spring kit and it was sketchy at best, but I managed to get it in without killing myself. Since then I’ve switched to a shorter softer spring which is easily installed by hand and I spaced it up for a little more power, it shoots around 835fps which is right at 13ft lbs with a 8.44 pellet. So if you’re really close to getting the threads started, you could figure a way to hold the action so you can put your weight behind it to close that small gap and start the threads. Only you know what your limitations are so be careful.

 

[Sqwirl57]

It depends on how close you are to getting the threads started on the end cap, as to whether it’s doable by hand. I had to build a spring compressor for my 97K when trying to install a hornet spring kit and it was sketchy at best, but I managed to get it in without killing myself. Since then I’ve switched to a shorter softer spring which is easily installed by hand and I spaced it up for a little more power, it shoots around 835fps which is right at 13ft lbs with a 8.44 pellet. So if you’re really close to getting the threads started, you could figure a way to hold the action so you can put your weight behind it to close that small gap and start the threads. Only you know what your limitations are so be careful.

Pre-compress ARH springs and kits first for an easier install. They shrink quite a bit.

 

[bustachip]

Pre-compress ARH springs and kits first for an easier install. They shrink quite a bit.

Yes my hornet kit had been set by JM.

 

[Hateful McNasty]

Ya, I'd say your missing a safe way to compress the spring ... Just Google air gun spring compressor and look over the 1000's of ideas to choose from.

Also of you preset the new spring it helps take some of the preload your fighting ...

"scragging tool"

Resizing a mainspring | Blog | Pyramyd AIR

by B.B. Pelletier I recently started writing more reports about the fundamental things that many airgunners would like to know. These are things you don't have to know to shoot an air gun; but if you do know them, they can often help you recognize why your gun does what it does. You also don't

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On my break barrel I use this as my compressor. 14-20$ harbor freight or home Depot

 

[bdzjlz]

Hard to do with out a spring compressor.

 

[Sqwirl57]

Yes my hornet kit had been set by JM.

Yeah they say that but I've found it's still easier to do after you do it yourself. I've never had an issue installing any kit in any springer and never once used a compressor. The one exception to that rule would be the Walther Parrus but that gun has like 3" of preload before the trigger assembly even starts to enter the tube. Still managed it by hand but wouldn't attempt that one again

 

[bdzjlz]

This spring compressor works very well, mounts on the scope dovetail grooves, won’t break the bank, and is available from Pyramid Air - a must have for springer do-it-yourself work.

 

[Bear-of-Grayling]

The most important thing. With the spring out, start threading the end cap on. Just barely find the beginning of the thread contact. With blue painters tape, mark where both just start to catch each other. When you compress the spring, put the end cap on the floor. Push down on the receiver into the end cap making sure you are just before the threading contact. You only has a couple seconds to make the contact and turn to thread. Will take multiple attempts.

 

[willy]

OK this how old folks have to do it:"Find carpet floor no stock ,hold action with one hand push down on cap on floor and turn your body with action and hold cap with other ,and hope nobodys watchen" Or easy way"

 

[Sqwirl57]

As a side note, wear some good leather gloves in case you slip. If your hand is under the sharp corner of the tube when it slips you may lose a finger. At the bare minimum you will bleed a lot

 

[Hateful McNasty]

This spring compressor works very well, mounts on the scope dovetail grooves, won’t break the bank, and is available from Pyramid Air - a must have for springer do-it-yourself work. View attachment 407419

Don't work $100 worth imho.. 25$ maybe .

 

[cjtamu]

Don't work $100 worth imho.. 25$ maybe .

Haven’t tried it on a HW35 so can’t comment on that particular gun. As I’ve said before, the issue with the Rail Lock is lack of vertical adjustment. Some guns line up great, some not so much. And then on a 35 you have to turn the end cap. I’d make sure I had solid contact before I did. I‘d set the spring first and see if that helps.

 

[Mycapt65]

The most important thing. With the spring out, start threading the end cap on. Just barely find the beginning of the thread contact. With blue painters tape, mark where both just start to catch each other. When you compress the spring, put the end cap on the floor. Push down on the receiver into the end cap making sure you are just before the threading contact. You only has a couple seconds to make the contact and turn to thread. Will take multiple attempts.

I use a similar method. I clock the start position of the threads with the trigger notch. Hold the action vertical, stick the barrel down on an old folded bath towel on the work bench. I pull the trigger block down with my strong hand while spinning the action into the trigger block with my weak hand.