Air compressor's died.

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friendly_prawn, Jun 26, 11:54am
anywhere on the shore to take it to get it fixed? It's a blackridge model 77.
I know there is an outfit in Penrose, but was hoping there was somewhere closer. Anyone know of anywhere on the shore?

skull, Jun 26, 11:58am
Be careful you're not investing more than a replacement is worth.

gpg58, Jun 26, 12:04pm
+1
If google got it right re model, Unless just the pressure switch faulty, very unlikely to be worth fixing at $249 new.
http://www.supercheapauto.co.nz/Product/Blackridge-Air-Compressor-95LPM-2-0HP-Direct-Drive/223418

friendly_prawn, Jun 26, 12:26pm
Im already aware of that. The guy at Penrose said he would take a quick look and could tell me in a minute or two what the problem was and what the cost would be to fix it. So if simple., I could give the go ahead. If expensive I could dump it. The problem is I have to drive all the way over to Penrose to find out. Just wondering if there is some where on the shore that can do the same - take a quick look and give me an idea of the cost so I know whether its worth fixing or not.

It could be something as simple as resistor!

kazbanz, Jun 26, 12:49pm
Ash air used to be on Wairau road.

budgel, Jun 26, 12:53pm
Have a look at the back of the motor, there may be an overload switch to reset it. Mine (different brand) has one.

friendly_prawn, Jun 26, 2:49pm
thanks mate they said they'll look at it

friendly_prawn, Jun 26, 2:51pm
it's still getting power. Just making weird noise and compressors not pumping air in to the tank.

supernova2, Jun 26, 3:16pm
Has it got an unloading/overpressure valve on the pressure switch. Brass thing with a key ring? If so give it a tug it might have just stuck open.

friendly_prawn, Jun 26, 3:29pm
Awesome will check

tweake, Jun 26, 4:00pm
unloader valve is the main on/off switch on the pressure switch.
but the other common cause is failed check valve or capacitor on the motor.
if you bleed off all the air pressure and it starts fine, but then will not restart, then its the check valve.

or it could have seized a piston.

the-lada-dude, Jun 26, 4:06pm
I suppose it's too late for mouth to mouth, a defibrillator ?. threaten it with a hammer ! . I was once fatally injured and pronounced brain dead, but i'm ok now ?. maybe it isn't too late, give it a go

fungles, Jun 26, 8:51pm
Learn some simple faultfinding skills.They come in handy in life.
Dump the air and see if it starts. If so it is possibly the unloader valve, and wont start again once the tank is pressurised . If it still wont spin, you need to replace the start capacitor, $30 at a electrical retailer, unfortunately you will need to drive there. to get one. but this phenomenal effort is slightly reduced by it having clip type connectors, therefore plug and play.
You will find this under the plastic front cover. These cheap things use leather pistons that are designed to run dry., they dont seize, just eventually fall apart.
You have saved $200 and learned something.

yz490, Jun 27, 9:39am
My super cheap belt drive parallel twin compressor just sat there humming & trying for a couple of seconds till it popped the overload on the multi plug & think it did it on the compressor motor when plugged straight into the wall minus multi plug--Anyway--was one of the two start capacitors & hell do they give a 'whack' shorting out with a big screwdriver just to check, when you think they must be dead. Terminal had gone bad rather than an internal capacitor fault so just used a crimp on open ended small terminal & forced it under the alloy riveted terminal. Long story about bugger all sorry.

friendly_prawn, Jun 27, 9:55am
Thats what mine is doing. It still had half a tank of air this morning when I tried to start it. It started first pop. Ran properly. Switched it off. Tried to start again (with air in the tank) and it just made a humming noise. Turned it off then turned it back on and it started working again.

Its an intermittent fault. But it shows the basics (compressor etc) are ok.
Does this point to a resistor being the problem? Going to pull the black cover off after to see if there is anything obvious.

fungles, Jun 27, 11:11am
There is NO resistor. Out of spec capacitors will cause that exact problem, As I said, replace it, and you are good to go.

friendly_prawn, Jun 27, 12:10pm
Awesome. cheers mate.

gpg58, Jun 27, 11:35pm
May even just be a loose connection on capacitor, or burnt or corroded one, so some cleaning or tightening may work.
But depending on type of motor, it could be a faulty start switch inside it, possibly burnt contacts that may be cleaned up with a bit of fine sand paper, but would require dismantle motor. (unless it uses an electronic one, again check connections, or replace)
http://www.hvacspecialists.info/electric-motors/split-phase-motor.html https://www.youtube.com/watch?v=I6Dzwnky2AI&ab_channel=EurtonElectric

deleted double post

friendly_prawn, Jun 28, 7:23am
awesome guys. I appreciate all the advice. I'll attack it on the weekend following all the advice in here and see what comes of it. I'll let you know what I find.

m16d, Jun 28, 8:46am
With them compressors from supercheap. the instructions do say to only start it with an empty air tank.

friendly_prawn, Jun 28, 10:20am
Real men dont follow instructions.

tweake, Jun 28, 12:13pm
so basically fine print your way out of a defective product. thats not even legal.

mrfxit, Jun 28, 1:31pm
Interesting, so how exactly does it work with the auto pressure cut off/ on switch.
Does it empty the tank before starting up . . .

LOL yea sure . commerce commission & disputes tribunal would have a field day with that instruction.

I suspect that it refers to not leaving the tank full when not using it.

friendly_prawn, Jun 28, 1:48pm
You just beat me to this. Well said. It would be a bloody nightmare if it had to dump all the air in the tank before starting again.

gpg58, Jun 28, 4:49pm
Did see though, it has a 75% duty cycle based on running 45 seconds then stopped for 15, except for on initial startup, and also states stop using tool while compressor is running.