Part Two of Neil’s refurbishment of a classic rifle, with a new set of seals
13The air cylinder end cap can usually be removed with a bit of an old leather belt wrapped around it, and then grips used to unscrew it. This one was stubbornly tight and so I had to fabricate a tool to remove it. This consisted of a bit of flat plate with a 20mm diameter hole in it, and then two 3mm diameter holes drilled diagonally opposite on a 25mm pitch circle diameter and then two 3mm diameter pins through to locate in the two holes in the end cap.
14The other end of the cylinder removed so that the large ‘O’ rings can be replaced.
15We are now ready to place out the new seals and scrupulously clean everything ready for reassembly.
Start by replacing the large ‘O’ ring on the filler valve assembly and screw back into the end of the air cylinder.
Put a minute spot of lubricant on the seal and screw the caps into the air cylinder. There is no need to over-tighten these, just a nip will do.
161718Replace the small ‘O’ ring on the filling valve.
Now replace the three ‘O’ rings on the ‘ T’ bar filling adaptor.
Insert the filling valve and spring into the adaptor and then screw this assembly into the air cylinder end cap.
19Replace the two seals on the manometer screw, the thicker ‘O’ ring under the head of the fixing screw, and the thinner one between the manometer and the action. Screw the manometer onto the action.
20Assemble the hammer, spring and spring end cap into the trigger housing body assembly and slide it over the hammer guide. Make sure it is lined up correctly with the rest of the action and fix in position with the cap head screw.
21Replace the transfer port ‘O’ ring and mate the barrel/ breech assembly to the rest of the action, being very careful
that the new ‘O’ ring is in the correct position in the annular location rings.
22Screw the two assemblies together with the six cap head screws making sure that the bolt is correctly located in relation to the hammer and functions as it should.
23On the 410 variant, replace the magazine indexing system with the three cap head screws and then make sure that the small operating lever is correctly positioned and is functioning correctly.
24Re-fit the ‘8’ clamp and nip up the three retaining grub-screws. Make sure that the barrel is in its “natural” position and not twisted.
2526Fit the trigger guard back with the two cap head screws.
Now fit the completed action into the stock with its single cap head screw.
27Tofill this rifle from empty, the action has to be cocked. I only filled to 100-bar pressure just in case I had to empty the cylinder again if it lost pressure overnight.
28There was no pressure loss overnight, so the cylinder was topped up to 160 bar and the rifle put over the chronograph. A string of 10 shots gave the high reading of 11.6 f.p.e. with a maximum muzzle velocity variation of 9 ft/ second. This is well within the U.K. limit of 12 f.p.e. so now all of the ancillaries can be replaced and the tools can be cleaned and put away.
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