Gas Valve - Inlet Test Point and Burner Test Point screws

[hayati]

Hello,

Some advise please. Doing my gas course so I have taken a few boilers home to practise taking them apart so I can understand more how they work.

For the gas valve in a Worcester boiler I got my hands on I have been trying to undo the screws for the Inlet test point and Burner test point. I literally cannot get them loose, to the point where I actually snapped a flat head screwdriver. Looking at the screw heads in the gas valve these have also been damaged when I tried to loosen them.

Can any advise how to get these loose or why they aren't coming loosen? I don't want to be in a situation in the future where once qualified I cause as much damage to a customers boiler as I have done with the one I am practising on at the moment.

Any advise greatly appriecatied.

Cheers

 

[Aquarius]

Were you using the correct sized screwdriver head?

 

[hayati]

the 1st screw driver I used which snapped was not the correct size (lesson learnt there!!!!). After that I did use the correct size screw driver but the screw still just won't move

 

[snowhead]

If these valves have been or are being used for training then they will have already been abused, not something that would happen in the real world.

They are beyond the point of being of any use.

When the screw is softer than the screwdriver you need to use the widest blade that will fit.

You may get the screws out by holding the valve firmly in a vice or jammed between heavy objects, then put the screwdriver in the slot, apply slight (un)turning pressure and tap the head of the screwdriver with something heavy, in effect making an impact screwdriver.

 

[Gasmk1]

Notorious also for becoming corroded in by leak solutions

 

[hayati]

If these valves have been or are being used for training then they will have already been abused, not something that would happen in the real world.

They are beyond the point of being of any use.

When the screw is softer than the screwdriver you need to use the widest blade that will fit.

You may get the screws out by holding the valve firmly in a vice or jammed between heavy objects, then put the screwdriver in the slot, apply slight (un)turning pressure and tap the head of the screwdriver with something heavy, in effect making an impact screwdriver.

I'll give this a go, thank you