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Author Topic: Cometa 400/Fusion barrel hinge screw removal problem  (Read 173 times))

Offline DEAN

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Cometa 400/Fusion barrel hinge screw removal problem
« on: September 20, 2022, 06:57:15 PM »
Trying to remove the big screw that holds barrel hinge in and it will not budge, little set or stop screw is out so that's not the problem, on the few videos I could find where they remove it they just unscrew it easily.. I'm using a big screwdriver and cranking on it as hard as I can and it wont budge, it looks almost like its a pin instead of  screw but if so why the slotted screw head.Also tried a bit of heat didnt help.

  • Rockville, Indiana
Air Arms TX200 .22 Beech
RWS 48 .22
RWS 48 .22 black stock
RWS 48 .177
Cometa Fusion Premier Star .22
Cometa Fenix .22
BSA LIGHTNING XL .22 (spring)
Webley Turkish Tomahawk .22  John in PA tuned
CROSMAN MK1 PISTOL
CROSMAN 140 .22

Offline lefteyeshot

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Re: Cometa 400/Fusion barrel hinge screw removal problem
« Reply #1 on: September 20, 2022, 07:49:34 PM »
Could be rusted. Liquid SWrench. Blue or red lock tite.
  • Savannah, Ga.
Diana 470th, 56th, 350 PC
BSF c60
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Dominator 200 carbine
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Offline DEAN

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Re: Cometa 400/Fusion barrel hinge screw removal problem
« Reply #2 on: September 20, 2022, 10:28:56 PM »
Not rusted, betting loc tite but not sure how much heat I can apply to it and not hurt anything.
  • Rockville, Indiana
Air Arms TX200 .22 Beech
RWS 48 .22
RWS 48 .22 black stock
RWS 48 .177
Cometa Fusion Premier Star .22
Cometa Fenix .22
BSA LIGHTNING XL .22 (spring)
Webley Turkish Tomahawk .22  John in PA tuned
CROSMAN MK1 PISTOL
CROSMAN 140 .22

Offline lefteyeshot

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Re: Cometa 400/Fusion barrel hinge screw removal problem
« Reply #3 on: September 20, 2022, 11:15:19 PM »
When taking out a barrel pivot bolt the gun needs to, not cocked, but at least broke open. No tension on it.
  • Savannah, Ga.
Diana 470th, 56th, 350 PC
BSF c60
Parrus wood
Dominator 200 carbine
Proxima
Synergis
Win. 1000w, 800w, 1100w, 1100s
Webley .22 Jaguar
Mendoza RM2800 repeater
Norica Massimo .22, Black Eagle
CZ631, 2 CZ634
Hammerli X2 dual cal.(Mendoza)
Beeman RS2.177/.22
Air Hawk Elite wood T.H.
Storm in Benj. T.H. stock, GRT
3 Crosman 3100(Spain)
Steoger Ducks Unlimited X3
RWS93 (Spain)
RWS320 (China)
2 TF99, TF59 GRT
TF89 (chopped, shrouded Beeman .22 Brl.)
B40, B26-2, B21, B20
2 B3-1
4 Peak B4-2
Model 62
2 QB6,
2 QB57
2 Fast Deer
2 B3-1AK
AR2078B, AR2078T.H.
Zogunz Hawk 010 .22 co2 (Phil.)
EIG 1353 co2 (Japan)
XSP 120D single stroke dual cal. pistol
P17, Steoger XP4 single stroke pistol

Offline Ilimakko

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Re: Cometa 400/Fusion barrel hinge screw removal problem
« Reply #4 on: September 21, 2022, 04:35:43 AM »
What Tim said.

If the barrel is locked, there's plenty of tension on the pivot bolt, preventing it from turning.

The first step in any breakbarrel pivot bolt removal scheme is to break the barrel, to break the tension. Then things start turning.
LGV Master Ultra .22 cal
D48 .22 cal
350 Mag .25 cal
H135 .25 cal
WFH .22 cal
Fenix 400 .22 cal
G1250 .22 cal
MP513M .22 cal
D25 .177 cal (c. 1960)
BSF S54 Match .177 cal (c. 1965)
E-C2 5.4 mm (c. 1920)
FX T12 .22 cal

Offline DEAN

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Re: Cometa 400/Fusion barrel hinge screw removal problem
« Reply #5 on: September 21, 2022, 04:13:15 PM »
tried it broken open and closed no go either way.

Got tired of trying to get screw loose and just knocked pin out of the cocking arm brace and took it off. This thing had been shooting great but I dont see how there was grease everywhere up on piston seal and on the piston itself real thick..thought Id bought a piston seal for it but guess not so have to order one now.
« Last Edit: September 21, 2022, 04:52:56 PM by DEAN »
  • Rockville, Indiana
Air Arms TX200 .22 Beech
RWS 48 .22
RWS 48 .22 black stock
RWS 48 .177
Cometa Fusion Premier Star .22
Cometa Fenix .22
BSA LIGHTNING XL .22 (spring)
Webley Turkish Tomahawk .22  John in PA tuned
CROSMAN MK1 PISTOL
CROSMAN 140 .22

Offline DEAN

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Re: Cometa 400/Fusion barrel hinge screw removal problem
« Reply #6 on: September 21, 2022, 06:18:41 PM »
Found the piston seal, degreased cleaned everything up put new seal on, was going to put in a new spring but the oem spring still looks great so just relubed lightly polished spring ends and reinstalled.. dieseled first 4 or so shots then settled down, shot cycle seems smoother then before. Will shoot a 100 or so pellets then run thru chrony and see if new piston seal made any difference.
  • Rockville, Indiana
Air Arms TX200 .22 Beech
RWS 48 .22
RWS 48 .22 black stock
RWS 48 .177
Cometa Fusion Premier Star .22
Cometa Fenix .22
BSA LIGHTNING XL .22 (spring)
Webley Turkish Tomahawk .22  John in PA tuned
CROSMAN MK1 PISTOL
CROSMAN 140 .22

Offline Artie

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Re: Cometa 400/Fusion barrel hinge screw removal problem
« Reply #7 on: September 21, 2022, 06:39:15 PM »
I use a soldering iron to loosen frozen bolts and screws. I hold the tip on the head and apply heat for two or three minutes. It works surprisingly well.
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Offline DEAN

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Re: Cometa 400/Fusion barrel hinge screw removal problem
« Reply #8 on: September 21, 2022, 10:36:14 PM »
I use a soldering iron to loosen frozen bolts and screws. I hold the tip on the head and apply heat for two or three minutes. It works surprisingly well.

Artie that's a good idea, I used a small propane torch and heated it till it was hot enough I couldn't touch it and it still wouldnt come loose, so just knocked pin out of the cocking shoe rod or whatever it is called. It was a pain getting pin back in with the tiny washers but still easier and faster then taking/getting bolt out.
  • Rockville, Indiana
Air Arms TX200 .22 Beech
RWS 48 .22
RWS 48 .22 black stock
RWS 48 .177
Cometa Fusion Premier Star .22
Cometa Fenix .22
BSA LIGHTNING XL .22 (spring)
Webley Turkish Tomahawk .22  John in PA tuned
CROSMAN MK1 PISTOL
CROSMAN 140 .22

Online mikeyb

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Re: Cometa 400/Fusion barrel hinge screw removal problem
« Reply #9 on: September 23, 2022, 12:02:54 AM »
Trying to remove the big screw that holds barrel hinge in and it will not budge, little set or stop screw is out so that's not the problem, on the few videos I could find where they remove it they just unscrew it easily.. I'm using a big screwdriver and cranking on it as hard as I can and it wont budge, it looks almost like its a pin instead of  screw but if so why the slotted screw head.Also tried a bit of heat didnt help.

Looks a lot like some of my Hatsan pivot bolts. I used a LARGE flat blade screw driver and custom ground it down to perfectly fit the slot. These fastener heads are soft steel and will get badly damaged if the tool is not a perfect fit.

On one of my Mod135s I put the action in a padded vise and could not budge the pivot bolt with all the strength/grip I could muster. Then I clamped a large pair of vise grips to the screwdriver for leverage and leaned into it! I was able to "crack" the threaded bolt loose with the added leverage.

If you don't NEED to remove that bolt, I suggest you leave it as is. Your solution worked well.
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Offline lefteyeshot

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Re: Cometa 400/Fusion barrel hinge screw removal problem
« Reply #10 on: September 23, 2022, 01:04:27 AM »
I had a break barrel I noticed the yoke in the front of the receiver the barrel block fits in was bent out a little on one side. Getting the pivot bolt out was very difficult cause the hole was not aligned. Back porch, a couple of towel and a hammer. Stuck the yoke out past the edge of the porch so I didn't bend the other side while straighenting the bent side. Pivot bolt went back in much easier cause the holes were straight and enline.
  • Savannah, Ga.
Diana 470th, 56th, 350 PC
BSF c60
Parrus wood
Dominator 200 carbine
Proxima
Synergis
Win. 1000w, 800w, 1100w, 1100s
Webley .22 Jaguar
Mendoza RM2800 repeater
Norica Massimo .22, Black Eagle
CZ631, 2 CZ634
Hammerli X2 dual cal.(Mendoza)
Beeman RS2.177/.22
Air Hawk Elite wood T.H.
Storm in Benj. T.H. stock, GRT
3 Crosman 3100(Spain)
Steoger Ducks Unlimited X3
RWS93 (Spain)
RWS320 (China)
2 TF99, TF59 GRT
TF89 (chopped, shrouded Beeman .22 Brl.)
B40, B26-2, B21, B20
2 B3-1
4 Peak B4-2
Model 62
2 QB6,
2 QB57
2 Fast Deer
2 B3-1AK
AR2078B, AR2078T.H.
Zogunz Hawk 010 .22 co2 (Phil.)
EIG 1353 co2 (Japan)
XSP 120D single stroke dual cal. pistol
P17, Steoger XP4 single stroke pistol