S400 .177 breech seal part no s536-bs008
S400 .22 breech seal part no s538-bs009
Transfer port seal part no s427- 6x1
take the bs number and the 6x1 into a bearing/ seal supplier and you should be able to get them off the shelf.
At one time I think it was UKNeil who made some seals for the transfer port area, using an O ring and a brass ring to stop the seal being drawn through and fired out. Also makes them much easier to place, and to keep in place.
www.shebbearshooters.co.uk. Ask for Rich and try the coffee
I replaced TP with a new seal as well. Incidentally, there is a brass washer that I assume sits inside the TP seal. Can't locate this on the parts diagram so would appreciate confirmation.
Pretty sure TP seal went back as it should. Leak is coming from the breach, I feel the puff of air on my face when shoting. But I take note of your suggestion.
It'll get another strip shortly so I'll check it out. Thanks
S
I have had a good look at this and found that:
1. The leak is largely between the brass breech block and the probe housing in which the breech block is located. The leak therefore independent of the probe tip o ring.
2. The breech block hole and transfer port are not as well aligned as they might be which probably doesn't help. I replaced TP o ring and refitted With the UK Neil washer.
3. The brass breech block is in tight (i assume glued) and hairdryer heat not enough to loosen it.
How much heat can I apply (with a gun) without harming the probe housing finishing. Is the finish blued? If so then it won't be so fragile.
I am itching to remove and reseal this but am stuck at the first hurdle. Any hint and tips please?
To those following my earlier threads, sweet spot fully sorted by replacing hammer spring and firing valve. Thanks for all the help on this, much appreciated.
what bolt do you have? the aluminium was too loose. hence some of the answers.
got it. dead simple. no fuss. a reread just reminded me. the cap nut on the bolt is loose.
put some locktite on it. no more spending out on seals that are not wrong.
the only thing i can find wrong is the nut on the steering wheel.
Not sure about your paragraph 1/, if it's leaking around the brass insert, it can't be glued in properly. A hot air gun should shift it. You can use too much Loctite when you replace it, and glue the whole thing into the breech block. Are there dints in the top of the barrel were the grub screws fit? you can usually rotate the whole barrel to line the two holes up.
Gus
The ox is slow, but the earth is patient.
Thanks, its not from the probe seal however but blowing down the side of the brass breech. Confirmed this with soapy water.
Nevertheless there'll be some benefit in checking the bolt etc. It seems to be aluminium. The attaching Allen bolt is tight and doesn't work loose. The o ring on the bolt allows firm lock up but appears thicker than standard which won't help. However its the breech blow by I cannot access to resolve.
S