ARB air locker

Submitted: Sunday, Jan 06, 2008 at 14:35
ThreadID: 53170 Views:2252 Replies:2 FollowUps:1
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Greetings all

I would like once again to avail myself of the vast store of knowledge that is the Forum.
I have an air locker fitted to the Cruiser. After using the original air pump to inflate a heap of tyres the abovementioned pump threw in the towel. I am in the process of fitting a much larger unit to hopefully carry out both duties without stressing too much.
Question, what is the correct air pressure to engage the diff lock without damaging the internal seals? I rang our local ARB agent and was told that 5 PSI was required. I asked if he meant 5 atmospheres/ BAR (about 75 PSI). The phone went quiet for a while and when he came back assured me that 5 PSI was correct. This seems awfully light on to me, but having been wrong once or twice before I thought it might be a good idea to ask before I blow something up. The original would inflate tyres to road pressures without any problems and I did not see any pressure regulator to reduce to 5PSI for diff operation.

Cheers pop

PS Yes i know that volume and pressure are 2 different things.
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Reply By: Crackles - Sunday, Jan 06, 2008 at 15:04

Sunday, Jan 06, 2008 at 15:04
ARB lockers are designed to work at 90 PSI although they do engage at far less pressure. ARB don't like you using another brand compressor and threaten a loss of warrenty if you do as they say running at lower pressure can cause damage. When I upgraded my compressor to a different brand I got around this by useing their air switch so there can be no dispute.
Cheers Craig........
AnswerID: 280091

Follow Up By: pop2jocem - Sunday, Jan 06, 2008 at 15:11

Sunday, Jan 06, 2008 at 15:11
Yeah, thanks for that Crackles, thats what I thought and I am going to use the original switching as you have done. Thanks again

FollowupID: 544312

Reply By: Oldsquizzy (Kununurra) - Sunday, Jan 06, 2008 at 15:18

Sunday, Jan 06, 2008 at 15:18
The switch ARB supply is closed at 70psi and open at 100psi. Any more than 100psi and you are looking at damage to airlocker.
AnswerID: 280095

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