Nitro Piston Replacement Benjamin Trail AW NP .22 950fps



Author Topic: Nitro Piston Replacement Benjamin Trail AW NP .22 950fps  (Read 4139 times)

Offline OleTomCat

  • Tree Rats Beware.
  • Old Timer
  • ******
  • Posts: 5956
  • yes
    • GTA Web Map
  • Real Name: Al
Re: Nitro Piston Replacement Benjamin Trail AW NP .22 950fps
« Reply #20 on: June 23, 2013, 10:17:35 PM »
Welcome to the GTA!

The vertical stringing is indicative of seal failure.  Beware, you may find multiple problems. 
.... You will want a brake hone, ....

....Hone the tube with the brake hone, cross-hatching as you go. 

Are all brake hones the same? i.e. grit and diameter? No
How does one cross-hatch? Carefully and evenly.

Can this cleanup be done with emory cloth instead? Yes

Thanks
  • Summerville, SC
Home Of Air Guns Inc.
Air Gun Tuning and Targets

Air Guns:
Sheridan Blue Streak, aka The Blue Demon Rebuilt Steroid Style By Mac1.
Gamo Silent Cat, tuned by Me, smooth as butter.
Crosman Storm, GRT-III trigger. Crosman N2 Ram. (For Sale)
Gamo Big Cat, GRT-IV Trigger, Custom installed N-Forcer Ram
Hatsan BT65: Big Nasty
FD PCP: ???

https://www.zeemaps.com/map?group=962067

GTA - What's been your success with air gun target practice?