Well to be honest I don't like the new style 'o' rings that ARB are using in the new diff locks. We have fitted two, one in my 120 and the other in the brothers 150. ARB installed the 150 and I did my own. Both have leaked enough oil back up the airline that the oil would not allow the compressed air to actuate the diff. The small 5 mm line with oil up it cannot build up the pressure required, particularly if it was cold. I removed the airline from the diff housing, placed a container under the line and blue out the oil. Would have been 50 ml of oil up the line. Both cars have only done 30000 - 50000 km. The diffs now work properly.
This never happened when they used the original 'o' rings that where round. The new ones are a square section with relief on the inside diameter of the 'o' ring, like a inverted radius.
A solution might to place a quick exhaust valve in the airline as close to the diff as possible. This would stop the oil going up the line and blow the oil out instead.
Really disappointed in this.
Rusty.
This never happened when they used the original 'o' rings that where round. The new ones are a square section with relief on the inside diameter of the 'o' ring, like a inverted radius.
A solution might to place a quick exhaust valve in the airline as close to the diff as possible. This would stop the oil going up the line and blow the oil out instead.
Really disappointed in this.
Rusty.
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