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I have finally selected and installed an on-board compressor. I selected a Mean Green 2Air from Opposite Lock (they were on special). It pumps my tyres from 24psi to 30psi in 25 seconds.
I have attached some images to show how I have installed it. I have used 6mm tubing to go to the pressure switch because the compressor is on the opposite side to the battery and it meant less wire. I ran the wire for compressor through 10mm loom tube with the 6mm tubing to make for a very neat finish. Power is connected to battery via 50A fuse and 40A relay. I have attached a circuit if anyone is interested.
I also have an air point at the front on the bullbar (using 8mm tubing through grill). To prevent any dirt or muck getting into connector, I use 25mm chair leg rubbers from bunnings and a bit of foam hose.
I no longer need to pop the bonnet to pump my tires up now.
Just a note, connect the negative of the compressor straight to battery and not through chassis. The compressor draws more than 30A (I know because it blew 30A fuse - also, compressor specs say it draws 32.6A), and you don't want that much current going through your chassis for any period of time.
I've got a pump that looks exactly like that on here in UK land On mine the switch is on the pump. So if I can find a pressure switch I could do as you have , cool. Now where can I get a pressure switch ? Does it sense some tyre pressure to fire it up ? If so how does it work if the tyre is flat ?
Electrickery is not my strong point ? lol
Y60 Patrol 4.2 d SWB in puke green
2" body lift, 2" pedders suspension lift, 35" Simex muds on excel 16" alloys, needs a turbo :/
The pressure switch is situated in the output side of the compressor and is pre-set so it will cut the compressor out when that pressure is reached. Angelo, where is the air filter for the inlet. I was going to run a hose and fit the filter inside the cab on the passenger side fire wall, but I mounted the compressor under a rear passenger seat.
Last edited by mudnut; 8th November 2013 at 09:53 PM.
Just a note, connect the negative of the compressor straight to battery and not through chassis. The compressor draws more than 30A (I know because it blew 30A fuse - also, compressor specs say it draws 32.6A), and you don't want that much current going through your chassis for any period of time.
Why is this?
i only ask as i run a twin arb compressor with the neg through the chassis and have had no problems, about 60A too.
But do not want one either.
I've got a pump that looks exactly like that on here in UK land On mine the switch is on the pump. So if I can find a pressure switch I could do as you have , cool. Now where can I get a pressure switch ? Does it sense some tyre pressure to fire it up ? If so how does it work if the tyre is flat ?
Electrickery is not my strong point ? lol
The way it works is like this (Keep the switch on the actual pump on)
Initial condition -there is zero air pressure and rocker switch is off
1 - Turn the rocker switch on and your motor (or accessories) on. Power runs from accessories through the rocker switch, through the pressure switch contacts, through the relay and energises the relay, thus closing relay contacts and allowing power through compressor.
2- When the pressure in the system reaches the 'off' pressure on the pressure switch (int the case of the one I have shown in link - 120psi), the contact on pressure switch opens, causing the relay to de-energise, opening the relay contact and stopping power to the compressor.
3- As you use the air, the pressure drops to below the 'on' setting (in the case of the one I have shown in link - 90psi), the contact on presure switch closes again and the relay is energised again turning compressor back on.
Basically, with that much current, you want as few points of contact as possible. If you connected through chassis, how much paint do you have there. You really should rub back to bare metal or you will get a voltage drop. When it gets wet, you will start getting electrolysis at those currents which could corrode in time.
Better to just connect to battery
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On mine the switch is on the pump. So if I can find a pressure switch I could do as you have , cool. Now where can I get a pressure switch ? Does it sense some tyre pressure to fire it up ? If so how does it work if the tyre is flat ?
Originally Posted by angelo_f
