Wednesday, August 20, 2008

My BSA Superstar, Part 2

Continuing to strip the rifle...

The pin at this point was loose and I slid it out of the way. If the coil spring had been fitted I would have had to make a pusher that slipped around the pin and pushed against the spring guide to relieve the tension.

The end of the gas ram. The setscrew in the cap apparently is used to set preload on the ram. I'm not sure I'm happy about that setup as the force of the ram is against the two screws that hold the end cap on, rather than the pin.

The gas ram slid out.

Don't worry, I won't open it. Likewise I couldn't find any place for the pump fitting to screw onto, so it must be a later ram that does not have adjustability? Or the pump port is hidden?

There was a steel washer at the piston end.

I had to hammer with a drift against the "Maxi Grip" rail, to get it to slide backwards and off the action. I don't like this system...

The long wire spring that retains the cocking lever in the slot was removed.

The sear is the last thing blocking the piston.

The pin that it pivots (and slides...) on was pushed out and it was removed.

The sear and pin.

The piston looked pretty good, if gunky.

I don't think I'll need to replace the piston seal.

I pried the rotary breech handle out.

And pushed the rotary breech out using a wood dowel through the barrel.

The rotary breech. I always assumed it was steel, but it's a plated alloy casting.

This might be the source of my power loss. Lots of gunk.

And the seal seems to be on its last legs. Both of the o-rings will be replaced.

2 comments:

Anonymous said...

Your images showing the layout of the trigger assembly saved my sanity.

Even so this trigger system is extraordinarily complicated and altogether the most awkward and fiddly thing to assemble. Fitting the sear was the worst part as it requires you to offer up the sear blindly into the mount against the pressure of the sear spring. A final note to say that one of the pivot pins is longer than the other 2 and must not be fitted as the trigger pivot because like me you will find that you can't refit the stock which of course means disassembling the trigger mechanism because sure as eggs when you try to swap pins over the others will fall out. I have never cursed so much before.

However, thanks for your blog it saved my marrage.

Best Regards

Nick Carter said...

Glad I saved your marriage! It's definitely one of the oddest guns to work on.