Rebuilding an HW55 Air Rifle
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Rebuilding an HW55 Air Rifle
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Topic: Rebuilding an HW55 Air Rifle (Read 921 times))
6mmintl
Shooter
Posts: 5
yes
Real Name: Frank
Rebuilding an HW55 Air Rifle
«
on:
April 27, 2017, 06:01:53 PM »
I had previously rebuilt this rifle installing a new plastic seal, made an seal adapter, lightened piston, honed cylinder, but reused old spring, cleanup of dirty trigger, and general cleanup,
deburr/polish.
I had bought all parts from Maccari (including new spring, moly, light tar, seal) but did not attempt fitting new spring.
Today I decided to do it right, scagged (set/stress)the new spring overnight, reground the spring ends square.
I then decided to make delrin spring guides and spring rotation washer replacing undersized steel spring guide.
Polished piston, straightedged piston rod to inside diameter and repolished piston rod sear surface as it was rough with machining marks.
One thing I noticed was record trigger sear and drop lever surfaces were not square and perpendicular to related surface (hardened cast part orig. hand ground) so put it on the mill and squared up all surfaces with carbide end mill.
Lubed with moly and assembled.
Much smoother rifle, no twang, scratchy Ratchet operation, or creepy trigger.
Though spring was 3/8" shorter it appear heavier cocking.
Will have to take out and see how it does.
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Star, ID
DRose
Marksman
Posts: 362
Real Name: David
Re: Rebuilding an HW55 Air Rifle
«
Reply #1 on:
April 28, 2017, 11:56:46 AM »
Good work. I hope it shoots as well as it looks. Dave
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Crown City, Ohio
GP2004
Sharp Shooter
Posts: 692
yes
Real Name: Gene
Re: Rebuilding an HW55 Air Rifle
«
Reply #2 on:
April 28, 2017, 12:28:17 PM »
Very nice!
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Griffith Indiana
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Rebuilding an HW55 Air Rifle