HW 45 strip down guide with pictures

[ateallthepies]

Also posted in the general section...

I finally went ahead and stripped my naughty 45 after reading others posts on how easy it was.

This was to refine the gun and to stop frequent detonations, not to increase the power.

I used the well known written guide here...

http://my.tbaytel.net/coopers/HW45Review/review.html

... you can use his guide and refer to my pictures if it helps?

First job is to put a paper clip here...

http://i157.photobucket.com/albums/t...ies/001-44.jpg

Then loosen this 2mm allen screw but don't remove...

http://i157.photobucket.com/albums/t...ies/002-34.jpg

You then need to push out this pin, mine was very loose...

http://i157.photobucket.com/albums/t...ies/003-30.jpg

Once this is done, pull the hammer back to open the gun but don't fully cock, the two halves can be separated with a wiggle of the two rods...

http://i157.photobucket.com/albums/t...ies/004-21.jpg

Underneath there is a larger 2.5mm allen screw that needs to be loosened. Mine had thread lock on it which a hair dryer sorted out...

http://i157.photobucket.com/albums/t...ies/005-22.jpg

Go then to the back of the gun and drift out the large pin. I needed to use a hammer and punch for this one...

http://i157.photobucket.com/albums/t...ies/006-20.jpg

Then remove that 2.5mm allen screw and the compression tube will then lift out with another small amount of wiggling and prying and maybe pull the hammer fully back as well...

http://i157.photobucket.com/albums/t...ies/007-14.jpg

Now comes the part I thought would be hard, the removal of the spring out the compression tube.
It turned out to be easy!
I used a quick grip clamp to hold the compression tube then drifted out the pin on one end completely....

http://i157.photobucket.com/albums/t...ies/008-16.jpg

Then using a small hammer I tapped gently the clamps release bar and the spring came out the tube a bit at a time. It helps if you hold the compression tube while tapping so nothing pings out sideways.
There was a lot of pre-load but the whole spring removal was easy...

http://i157.photobucket.com/albums/t...ies/009-12.jpg

This is the guts of the 45...

http://i157.photobucket.com/albums/t...pies/010-9.jpg

I was expecting the thing to be covered in grease but I was surprised to find a moderate amount. Still, some had worked in front of the seal and there was also a couple of gouges on the seal. This must have been causing the detonations?...

http://i157.photobucket.com/albums/t...pies/011-5.jpg

So I degreased everything, removed some small burrs from the slots and re-lubed and re-assembled in reverse order.

Like I say, for now I was not looking to increase power but to smooth out the stroke and stop the dieseling.

Upon chronoing it I found the power had indeed not changed and it still shoots .177 Hobbies out at a consistent 510-520 fps.
Also there was not one detonation or high reading out the 50 or so pellets I ran through it today.
It does smoke slightly on some shots but no where near the same level as before.

So if you have one of these and it needs to be tamed, have a go!

ATB,

Steve

[Bob.]

Is it just me, or can anyone else not see the photo's?
Bob.

[ateallthepies]

Ah yes, I copied and pasted from the general section and links to pics don't when you do that, I forgot.

Will fix....



Steve.

[ateallthepies]

Fixed


Steve.

[Bob.]

Fixed


Steve.

Thanks.

[BobSki]

What a brilliant thread. Thank you Steve, excellent photos and nice simple explanations, even I could sort my HW45 with your instructions.

Well done and thanks for taking the time and the trouble.

All the best
Bob