When you test it on jacks on the ground, what is the source of energy? Are you using the engine pumps or a mule? It is very easy to use the engine pumps on the aircraft to test the system. See my video
http://www.youtube.com/watch?v=w67UYBa48Lg&feature=plcp
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Herb R Harney
1968 337C
Flying the same Skymaster for 47 years
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