Thread: ARB Airlockers for D3/D4

From memory Phil (Discowhite) installed a second tank on the other side his D4 behind the sill with a hose that ran between the two tanks. Not sure if he had in plumbed to a second compressor or not though.

Just got off the phone with ARB, looks like only the front D3 air locker can be ordered,

Can anyone else confirm?

If I can be nosey what price did they quote fitted?

Originally Posted by weeds

there is nothing special required to engage lockers......any compressor that will pump to 90 odd PSI will do the job

i have twin arbs hooked up to a max air compressor

The lockers are designed to work at a particular pressure - hence the specific air locker compressor has a small tank in it to maintain correct pressure. To maintain the correct pressure with normal compressors both a pressure reducer and and pressure switch should be installed (and maybe a tank) - these are the modifications I talked about - now the lockers will work with higher pressures straight from a 150psi compressor but there is no guarantee with respect to longevity.

Garry

Originally Posted by garrycol

The lockers are designed to work at a particular pressure - hence the specific air locker compressor has a small tank in it to maintain correct pressure. To maintain the correct pressure with normal compressors both a pressure reducer and and pressure switch should be installed - these are the modifications I talked about - now the lockers will work with higher pressures straight from a 150psi compressor but there is no guarantee with respect to longevity.

Garry

no worries, thanks for the heads up......i think mine is fitted with just a pressure switch, i have a seperate tank so that the compressor is not constantly turning on and off every time you engage/desengage the lockers

is the locker only compressor is only relatively new item from ARB??......

Originally Posted by weeds

is the locker only compressor is only relatively new item from ARB??......

No has always been available and is about half the price of the tyre compressor. If you go into many ARB stores after a compressor for the lockers they will tell you that there is only one compressor - the $300+ version where the air locker compressor was $180 last time I checked but can only be used for the lockers.

See model CKSA12 ARB Air Compressors | ARB 4x4 Accessories

Looks like the compressor supplied with the locker will only do locker and be no worse than the existing one for tyres as it has no reservoir.
I would be connecting the locker to the on board tank line and a proper compressor and get Gordon's kit for serious use.

Originally Posted by isuzurover

I vaguely recall Daniel Bongard from ARB telling me that some US comp guys were using 300 psi in their lockers to maximise engagement speed.

True. 10 Bar [300 PSI] will not hurt new generation ARB's.
But please note that our solenoids (included with the diffs) are rated to 10 Bar [150 PSI].
Exceeding this pressure the coil springs holding the solenoid valves closed will compress and allow air to escape out the solenoid exhaust port (i.e., 'leak').
12v 20 Bar [300 PSI] solenoids are commercially available, but not from us. And from memory I believe the solenoid upgrade cost would outweigh the compressor savings. A pressure regulator, however, to limit the pressure to 10 Bar would be quite cheap. As to whether the LR electronics would be happy about sharing their air I cannot comment, as we have not tested this.

-daniel
AIR LOCKER