clarke 151te help.

[underdog]

thanks for replys again. im going to go back through my pics and look at whats pointed out but before i do i can quickly answer the last question. for testing i purposely used the same wire and gas and regulator in both welders. thank you

 

[underdog]

faulty gas solenoid? / dirt inside the gas solenoid?

IIRC the gas valve / solenoid should be inside the torch head on those..might be worth checking, could be the previous owner has dropped it and knocked something loose, or left it somewhere damp and some gunge is clogging it up?

hi iv taken the handle apart a few times and inspected the pipe is connected. iv put my palm over the end ov the nole with trigger pulled and listend for leaks elswhere but seems ok.

in this pic to my limited knowledge it looks like the gas has flowed enough to stop the cheese holes ,, am i correct in assuming that do you think. i know there is a small section of poor gas flow but its not much to me

 

[mike 109444]

Try turning off the gas and then running a bead. See what NO gas looks like.

 

[underdog]

I think you may have several faults on this machine (some maybe from previous owner trying to fix!)
First I would say you have a gas feed issue ref the "bubbling" As the gas valve is in the torch handle there may be an issue within the valve (bit of muck?) or a holed pipe that shows when the torch is moved (when you are welding!) If yo have access to a low pressure air supply you could try feeding low pressure air through while welder is unplugged but pulling trigger (this will save using up your gas) Could be leaking round swan neck. What ever it's drawing in air with the gas.
Second you have a connection/electrical fault. Looking at your pic 3 post 16 The first thick cable, down and to the left of the motor looks a bit cooked on it's sleeving, As this is a high current carrying cable it's not unusual to see some cooking but it does indicate that where it connects to may be a poor contact.
In the same pic what does the relay contacts under the plastic cover look like? (you may see SOME soot on the cover but over time the contacts can burn and so the relay operates but the power does not get across the contacts (can be intermittent).
From your description of the basic test you have done on the diode pack (metal finned device) they seam ok. But if you look at your pic just at the bottom of pic there are some spade connectors that you should pull off and clean and check there crimping. You could also try bypassing the cut out device (blue thing to the right of you screw driver) if this is acting up it may drop out the welding power mid weld. A made up double ended male spade connection lead would do this for testing.
Have you tried the welding wire from your new machine in the old one just to rule that out from any issues.

i see the thick cable your reffering to and i wil definately inspect this. also i will look at all your suggestions and see what i can find. a few wks ago i knew absolutely nothing about the inside of a welder. iv learnt so much from here so big thanks for that. i know what a rectifier is lol and i can now test diodes too. my brain has grown twice as much i will report back in a day or so when i get time to inspect and try it again. i will also try a no gas bead.


thank you everyone

 

[Kent]

faulty gas solenoid? / dirt inside the gas solenoid?

IIRC the gas valve / solenoid should be inside the torch head on those..might be worth checking, could be the previous owner has dropped it and knocked something loose, or left it somewhere damp and some gunge is clogging it up?

That is what I am thinking reading through the above. Can you borrow a fresh torch to try? I don't know if these are Euro torch connection but many adapt plants to take these off the peg torches. Not read second page but this is were I should look and I am no tec. man

 

[underdog]

iv finallysorted it out. it was a worn wire liner. i did the test for hanging a weight off it. with a straight hose it worked fine and prob around 1kg pulled the wire out. but as soon as i bent the hose it took a lot of my own strenght to pull it through. so a quick change to a wire liner and its consistently welding great. so annoyed i didnt take this advice sooner. i didnt need to buy a new one lol. i did do a few pics of no gas and full gas weld but they are all irrelevant now so il just show one of how its working now on 3mm.



thanks for all the help once again. anyone want to buy it lol

 

[underdog]

that was with co2 gas that came with new welder so think thats why its spattery