Swop barrel on a HW breakbarrel

[pelletcaster]

Hi,

Have anyone done this? Is it difficult and are special tools/a new pin necessary?

Best regards

Hi,

some guys are loosing the OP here.
So my 2-Cents.

Changing barrels on a HW-airgun is most likely done by simple exchange meaning a (new) barrel including the breech-block.
To my understanding changing just the barrel itself taking it out of the breech-block is quite unusual and difficult.

You may change complete barrels very easily between HW50 and 50s (as long as they have the newer 26mm system).
HW35 only fit another HW35, nothing else.
You may deliberately change barrels between HW80, 85, 90, 95, 98.

Using the old pin and nut (if undamaged) is standard. Take care of the washers. Some greasing of the pin with MoS2 is mandatory.
If you are lighthanded changing of barrel and still using the old shims - if undamaged - is standard behaviour too.
If you find any damage / galling on the breech fork, the breech block or the shims - replace the shims and ensure a proper MoS2-grease lube.

Hope this helps.
ATB
Andy

PS:
To ensure proper lock-up of the barrel in the breech I remove the wedge with the spring from the breech block, give all the mating surfaces (including the wedge on system side) some polishing efforts and a proper MoS2 relube. Works a treat and once done no need to touch it ever again.

[johnbaz]

Hi,

some guys are loosing the OP here.
So my 2-Cents.

Changing barrels on a HW-airgun is most likely done by simple exchange meaning a (new) barrel including the breech-block.
To my understanding changing just the barrel itself taking it out of the breech-block is quite unusual and difficult.

You may change complete barrels very easily between HW50 and 50s (as long as they have the newer 26mm system).
HW35 only fit another HW35, nothing else.
You may deliberately change barrels between HW80, 85, 90, 95, 98.

Using the old pin and nut (if undamaged) is standard. Take care of the washers. Some greasing of the pin with MoS2 is mandatory.
If you are lighthanded changing of barrel and still using the old shims - if undamaged - is standard behaviour too.
If you find any damage / galling on the breech fork, the breech block or the shims - replace the shims and ensure a proper MoS2-grease lube.

Hope this helps.
ATB
Andy

PS:
To ensure proper lock-up of the barrel in the breech I remove the wedge with the spring from the breech block, give all the mating surfaces (including the wedge on system side) some polishing efforts and a proper MoS2 relube. Works a treat and once done no need to touch it ever again.

I was given a few airgunning bits by a mate when he had a shed clearout, Believe it or not there was a HW80 breech block!!, I think he had the barrel machined down to fit something else!!



John