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"i am mainly" Merc S rebuild


ditchman
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Sort of tuning /cleaning polishing the trigger mech'........i have laid it out so you can see how it sits....with the piston/capture shaft thro to the trigger body....then the sear and onto the sear the trigger strut....

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first pic...the trigger strut sitting firmly into the sear......

 

2nd pic...the strut trigger spring...this gives you the resitance on the play/travel of the trigger

 

3rd pic....is the sear spring engaging the sear and in turn the sear locking onto the piston shaft...(cocked position)

 

4th pic ...is the piston about to slide into the trigger (uncocked body)

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#1...trigger body waiting to receive the piston shaft...(vilking will be along shortly) :lol:

 

#2...sear has moved up and trigger strut has engaged

 

#3 ..close up of engaged sear and strut...(fully engaged)

 

#4..this is the strut adjustment screw...you screw it in to lessen the bite on the sear...(so there is less travel for the trigger)

 

#5...this is the strut spring and behind it is the adjusting screw...(screw in the tighten the bite...screw out to lighten the bite)

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a little bit more oil on today......just a few drops at a time and use the ball of your hand to work up the heat...it will nearly burn you if you are doing it right....

 

just out of interest for a few...

 

  1. swept volumn of pressure chamber 2.48cubic"......or near enuff...40cubic cm
  2. gap between breech and chamber 14thou.....(this is where the breech seal comes into play)

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Edited by ditchman
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Wood looks like a far nicer piece than the Walnut on the one I sold - mine would have taken serious skill to make it pretty enough to be worth burning.

Indeed, and the stock on my airsporter'S' was the plainest piece of walnut I've ever seen. The pressed chequering was a joke as well, with one side noticeably deeper than the other. Of the many pellets I tried,it was only accurate with the old eley wasps. Otherwise it was disappointingly ok ish,not as nice as a mk1 or mk2 though. I would have another one of them at the right money. This Mercury is looking good though.

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have just been messing about with pellet sizes...(ere we go again)....doing the same now as with the AA .22...........

 

i have some old stock milbro select 177....but they seem to drop too far into the barrel about 1/4"...instead of staying flush with the breech.................they measure all the same ...good uniformity....4.5mm head size..(as said on the tin) 4.7mm skirt size................

 

and recomendations for pellets for this animal................i see Air Arms are doing a 4.52mm head size...any one tried them........

 

cheers

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this is the guide/cradle that keeps the loading arm straight when cocking ....the cocking arm was none spec and damaged and it scaped and damaged the cradle...i have a new cocking arm coming and when i fit it ....it will slide smoothly thro the cradle which i have flattened off now....this while also be greased unlike the rest of the rifle...

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Ditchman,this is becoming a nightly read and very enjoyable with good pictures.

My merc s had gold colour on the inlet letters,sure it was original !,which i then redid but memory is not what it was....

 

this one came devoid of colour............i have some gold leaf and size about somewhere...might just do it.....i will test fire it first and if it performs well then i might do it...

Edited by ditchman
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this one came devoid of colour............i have some gold leaf and size about somewhere...might just do it.....i will test fire it first and if it performs well then i might do it...

Oh you must do it if only for us to see.Cracking thread as ever

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this one came devoid of colour............i have some gold leaf and size about somewhere...might just do it.....i will test fire it first and if it performs well then i might do it...

Crikeys .........gold leaf,i just used spray paint with a touch up brush :unhappy:

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