GTA
All Springer/NP/PCP Air Gun Discussion General => Machine Shop Talk & AG Parts Machining => Engineering- Research & Development => Topic started by: uncle paulie on January 13, 2013, 11:44:34 AM
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Thinking of replacing the barrel on an XL with a LW barrel but am unsure of the method for removal and replacing the barrels from the breech block.
pv
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I've done it on other Crosman and RWS breakbarrels. Not for the faint of heart 8)
What I did was remove barrel & block from the compression tube and cut barrel off about 2" above block. Reamed the barrel out until it was no more than 1/8" thick then bake to about 450 degrees. Once it comes out of the oven I put it in a vice (leather wrapped to keep warm and to not mar with vice jaws) and then put a pipe wrench on the barrel and turn it. At that point they usually break free.
If that doesn't break them free then I turn a mandrel for a air hammer, heat breech block up again and drive barrel out. Installation is similar - heat block, freeze barrel that has just a slight interference fit and jam them together. Usually have to machine the end of the barrel before reassembly for the breech seal.
Very do-able, just gotta wanna ...