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Old May 8th, 2005, 11:40 PM
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Stephan Laputka
1995 D-90 SW
Join Date: Jan 2004
Location: San Francisco, CA
Posts: 972
Air Locker problem

I have an ongoing problem with my rear ARB belching diff oil up the airline and into the cabin. The ARB probably has 3,000 miles on it. I have replaced the axle breather line and checked to make sure there is nothing clogging the opening on the axle. In chatting with ARB they told me it was the O rings in the locker. Had Moab 4wd pull the diff out and change the o rings on the diff with the ones ARB sent me. There was no change at all with the new o-rings. Arb claims that there is no other element of the locker that would let oil seep into the air line. Despite this claim, they have sent me a complete seal kit with instructions on how to "reseat" the locker. The locker engages and disengages fine, there is no problem with it at all except for this damn oil. Anyone know what's going on or have any advice?
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Old May 9th, 2005, 09:40 AM
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Robert Dassler
1994 D90
D-90 Source Vendor
Join Date: Apr 2004
Location: Albuquerque, NM, USA
Posts: 994
I have installed upwards of 50 of these things in Rovers. It is critical to center the air line collar when fitting it on top of the o-rings. Use a feeler gauge to get the gap uniform all around, otherwise it will leak oil back into the air line when driving. Also can be more of a problem in cold weather when the o-rings stiffen up. You may have to grind a few burrs off of the inside of the adjusting nut to allow the air collar to center exactly.
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