Underpinner problems

[Framing Frenzie]

Hi. I have a Minigraf 4 Alfamacchine underpinner. It's started making a leaking air sound. Just a hiss at first but develops into a squeal like a balloon being let down slowly. My compressor keeps trying to top it up. If I use the machine there seems to be no loss in performance and actually stops the noise for a few seconds then it builds again. Please can anyone advise me if there is something I can do or if I need an expert. While I am asking for help, my size 10 block/wedges have been mis-firing for a while now. Does some within the setting but not all of them. I've inspected the block and it's clean. I've oiled it a bit from the outside but daren't take it to bits. All the other blocks/wedges work fine. Help with this too would be most appreciated. Thanks.

[Graysalchemy]

CAn you identify actually were the his is coming from is it from the air connection or is it inside. It may just be a lose seal on a pipe but it could also be the seals on the piston. If you want expert advice I would contatct Neil Stout at Framingengineer.com he may be able to advise you over the phone.

[Framing Frenzie]

Thanks for your reply. It seems to be coming from the cylinder/valve things at the side. Sorry for the girly description. Will see if anyone else has any thoughts and ring the man you mentioned if not. Thanks again.

[Graysalchemy]

If it is the cylinder then I would ring Neil. You may have to leave him a message but he will get back to you.

[Framing Frenzie]

Ok, thank you.

[Jamesnkr]

When you say it goes quiet when you use the machine... what is the exact action you undertake that causes silence?

(You may well have long-since sorted the problem.)

[Framing Frenzie]

Hi. Thanks for your message. It was when I pinned a frame, so using the foot peddle. I have had an engineer out to it today and he has fitted a new regulator. All quiet now. Thanks for taking the time to reply though.

[Jamesnkr]

Glad to hear it. Mine leaks in a couple of places, but I live with it.