Compressor no start

[the black box]

got a 3hp belt driven 50ltr compressor Air Force brand. I had to put a new mains lead on as the original was far too short to reach the sockets. Upon trying to remove original lead the screws head stripped, so I stripped the switch down replaced the screws and put it all back together and it doesn't work

So today I've put a brand new pressure switch on as I figured I had rebuilt the original wrong. Still nothing it briefly started on the old switch but nothing now. The tank is completely empty motor turns freely, no fuses popped or rcd tripped, nothing smell burnt

Anyone got any ideas got a job on requiring plasma cutter and this has decided to fail!

 

[knighty]

guessing/assuming you must have wired it up wrong ?

post some photos so we can have a look and try to figure it out :-o

 

[roofman]

check there is not a overload pin switch on the side of the box on top of motor...then re-check your connections machine and plug side

 

[normspanners]

check there is not a overload pin switch on the side of the box on top of motor...then re-check your connections machine and plug side

most of the time they are a switch with a white button that 'shows' to indicate they have tripped, sometimes they fail open and cannot be reset, it actually feels seized if it has blown , if I was doing it that would be MY first check coz I know the wiring would be ok

 

[the black box]

thanks all for your help ill have a look for this overload switch on the motor tomorrow. 100% sure of wiring both ends but will double check. im assuming it doesnt matter which side motor or input wirring goes on the switch? as theres no indication ive also checked the socket its plugged into (16A) for operation. if no joy ill get some photos of the setup. im sure its something simple that im overlooking

 

[roofman]

Dont forget the red button needs to be pulled UP for on when the lid is screwed on the switch...common mistake when trying to find power with the switch lid off

 

[the black box]

Thanks all for the help was indeed an overload switch which I never knew existed. flicked it back and it fired straight up

 

[roofman]

Thanks all for the help was indeed an overload switch which I never knew existed. flicked it back and it fired straight up

Its great when anyone replies and connects the final link as it helps others in the future...cheers bud and well done fixing it