THANK YOU!..
12v Compressor, no tank: Open chuck vs...?
- Thread starter woytovich
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I'm trying to struggle through a wiring diagram....should it still be switched on and off from the dash? I guess my thoughts are, if anything started to leak, the compressor wouldn't run continuously until it was discovered....just turn it on and off as needed?
I'm guessing the pressure switch goes back to an on/off switch located in the cab....thanks again for the help.
I'm guessing the pressure switch goes back to an on/off switch located in the cab....thanks again for the help.
- Thread starter
- #23
An on/off switch SOMEWHERE.... depends on your compressor placement and intended use... and tank size (how long to fill)
If you are just filling tires at the end of a wheeling day the switch can be anywhere.. you will be stopped and out of the truck. if you are using it for lockers you might want to be able to switch it on from the driver's seat.
If you are just filling tires at the end of a wheeling day the switch can be anywhere.. you will be stopped and out of the truck. if you are using it for lockers you might want to be able to switch it on from the driver's seat.
I've got a switch on the dash, the wire from that switch goes 'through' the pressure switch to the relais that provides the compressor with power.
When I flick the switch the compressor starts running. When the pressures builds up to 8bar or so the pressure switch interupts the power to the relais and shuts off the compressor. When pressure gets below 5bar or so it switches back on.
Works very well..
In hindsight it might have been better to put the relais in the ground wire instead of the positive wire. If it makes any difference at all that is.... dunno
When I flick the switch the compressor starts running. When the pressures builds up to 8bar or so the pressure switch interupts the power to the relais and shuts off the compressor. When pressure gets below 5bar or so it switches back on.
Works very well..
In hindsight it might have been better to put the relais in the ground wire instead of the positive wire. If it makes any difference at all that is.... dunno
Got it!...looking to go tankless like ToyRoverlander....but I am still learning about air lockers...the truck came with an electric locker in the rear, but the plumbing phase may include a plugged outlet for future use...thanks !
Thanks again for the ideas and the help..
You're welcome 
If you aren't running a tank, why do you need a pressure switch? In theory the compressor should put out 100+psi and your tires are only getting half that. If you aren't paying attention to the tire filling process, I guess I could see over running the compressor, but otherwise?
If you are running a tank inline I could definitely see the need for a pressure switch. I will be doing the on board compressor shortly, so this is an interesting discussion. For the first iteration it will be run without a tank and after I build the rear bumper and mount the extra fuel tank, I will mount a tank under the truck.
If you are running a tank inline I could definitely see the need for a pressure switch. I will be doing the on board compressor shortly, so this is an interesting discussion. For the first iteration it will be run without a tank and after I build the rear bumper and mount the extra fuel tank, I will mount a tank under the truck.
Because there's no safety valve on the compressor. That's why they usually have an open chuck and you have to manually turn your compressor on and off. If you use a closed chuck the pressure would keep building up and the compressor would be running at max pressure, pulling many amps and it could blow an hose or line.
That's where the pressure switch comes in. It protects the hose/line from blowing up, and it stops the compressor having to run at max pressure when the chuck is closed.
It really is necessary to have one if you dont want to have to manually turn it on and off all the tine. Theyre cheap too.. shouldnt be more than 15bucks.
That's where the pressure switch comes in. It protects the hose/line from blowing up, and it stops the compressor having to run at max pressure when the chuck is closed.
It really is necessary to have one if you dont want to have to manually turn it on and off all the tine. Theyre cheap too.. shouldnt be more than 15bucks.
Didn't realize the compressors didn't have a pressure switch of their own. Thanks for the heads up.
Would have made it a lot easier if they did....
You're welcome
You're welcome
TrekboxX
Supporting Vendor
Just one thing to add- if you ever use a pressure relief valve, be sure to get one that is rated for more flow than your compressor puts out. You can install a 10psi valve, for example, but one with a low flow rate and still blow stuff if it won't release air as fast as the compressor is putting it in.