I'm Kevin, new to the group and firstly just want to say thanks to the people who contribute here. The posts have been very helpful in getting a La Cimbali M20 Lever back to near working order. Trouble is now I am stuck and hopefully someone can point me in the right direction. I have replaced all the group head gaskets from looking at the lever diagrams on part sites. While I was doing this I also took the advice from people on this site and replaced the springs as they were rusty and one was broken.
When testing the machine the first time the pressure gauge was faulty, the needle was not at zero and rose quite quickly into the red so I immediately turned it off. The safety valve on the boiler did not let off so I figured it had not got TOO hot. There is a valve above the glass sight for the water level that was continuously hissing but I took it off and cleaned it up and now it seats properly and doesn't hiss. I replaced the pressure gauge with a new one and switched her on to see if I was going to get a win. The gauge did not move for about 10 minutes then started to rise to 0.5 but going above that seemed way to hot and it was not long before the safety valve did let off a blow of steam. I turned it off and adjusted the thermostat back two turns. I am doubtful the pressure gauge is faulty but the temp and pressure seemed a lot higher then the gauge reading. The line has been taken off and cleaned, scale was minimal if any.
I also noticed a small drip which made me concerned if I got ALL the gaskets! I tried pulling a few shots and well something isn't right. I have uploaded a video to show the drip and the way water just gets dumped threw the portafilter when I pull the lever down. On the lever returning there is minimal resistance and spurts water. Steam Tap works great, so does the hot water but why is the water just pouring out. I thought the coffee may not have been ground fine enough but it did the same ground down to baby powder.
Here is the video if anyone can offer some tips it would be greatly appreciated, shes been on my bench for ten years waiting to shine again.