Vesuvius Pressure Profiling Machine - General Discussion

JahLaza it was very difficult to manually push down the internals of the very bottom piece of the pipe as in the pic below (taken from your site) is there an internal part to this as this was the stiffest part of the whole assembly and the only possible source of an issue I could see?

That’s how it should be, you are pushing against a spring that should be exerting a strong force against that, as it’s holding the vent valve closed. When you lower the lever to vent the group, that action pushes down on that lower vent valve and opens it.

Check the seat is clean on both the lower tube and the valve face that pushes against it. Also run a test at 10 bar constant pressure and see if it still opens?

DavecUK Apologies in advance, this will be obvious to you but this is my first E61! The lower tube is the one circled below yes? This is all one piece. The valve seat you mention, is this internal to this tube? I cannot get at it. None of the other moving parts are really in contact with anything really, and I had applied molycote to any that sit against the walls of the tube

Adrianmsmith apologies for the confusion I’ve caused with that, the valve circled below was oriented the opposite way when in use and when I replaced

JahLaza The tube you circled is not where the valve seals. Clearly the vent valve is the wrong way up, but the red arrows show the valves viton seal and the seat is inside the tube, also shown with a red arrow. Check they are clean.

DavecUK yes, it was the wrong way up in the picture I took, it was the right way up anytime it’s been in place. Thanks for informing the identity of the valves.

my question was then on to the very bottom piece/tube/barrel, is there any internal part in that? If yes, can that be removed?

L’autre problem - what’s your thoughts on the straight 10 bar shot? It’s discharging water to the drip tray excessively for the entire shot. Many thanks in advance

Adrianmsmith ok, tongue in cheek! Please appreciate my ignorance in the E61 arena!! I disassembled again, easily removed that piece which I see just sits there and couldn’t be contributing to my issue! I changed the spring for the spare one supplied by acs which is longer but has less tension, and that has resolved the issue although it’s a little too loose id say, so, the issue was the spring me thinks.Apologies to you and @DavecUK for all my questions on that 😌

JahLaza The spring you used was the longer preinfusion spring that is normally not used. They leave it in the bag in case you with to enable the preinfusion chamber for some reason.

JahLaza

It’s not a spare. Count the turns on the ones you have against my picture and ensure the correct springs are used. The “spare” is from the un-mod’d preinfusion chamber.

Thanks folks, I quickly realised that when I tried it out at temp/pressure. The other spring back in now. It does seem like the spring is the cause of the stiff lever action for venting though? I might look for a replacement… Any thoughts on the excessive water discharge issue?

JahLaza

If you disassemble again please post a picture of all of the parts laid out as you will reassemble them in the orientation you intend to reassemble.

Also confirm the cam is correct and you fitted the cam lever first then the top and bottom chambers.

I’m still thinking assembly issue, sorry as it really can’t be wrong if it’s clean and moly on all springs and surfaces for assembly.

Adrianmsmith ok will do tomorrow morning thanks again

Adrianmsmith Hi, I disassembled again, here’s some pics, orientation as I disassembled and reassembled. molycote everywhere, all along spindle, all around cam, all around valves where they meet anything else, put back together again, cam first, top barrel, bottom barrel, lever, and it’s still stiff. The only time it hasn’t been stiff is when I changed that spring!