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I used compressed air on the gas lines at twice
working -pressure, 80psi. I applied it through a regulator, bringing it up
to pressure slowly. This was on the completed installation.
I used the grease gun/gauge on all my hydraulic
lines, once in position in the plane. Here I used 2000psi using hydraulic
fluid. I also primed all the hydraulic lines with the grease
gun.
I only used air on the gas lines to avoid
contamination by water or oil. Could have used gas in the grease gun I
suppose.
At any rate not a leak anywhere. Worth the extra effort.
Ian Crowe
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