I am finishing assembling a H9 B-25 for a friend, who installed the Robart retracts. The problem is when the nose gear goes down, the main gear goes up. I checked for inverted lines but all connections seems to be according to the diagram!!!. Any ideas? Thanks, Alex.

I would trying reversing the lines on the nose wheel and see if that corrects the problem. Robart gear uses air for up and down operation. Good luck.

Reversing the lines will fix it.

Thanks guys. I inverted the lines and it is working.

Glad to hear that, guys, as I have the same problem! [:-]
Al

Hi Gang,

I just finished a Hanger 9 build with the recommended Robart retracts. I noticed when hooking up the red and purple air lines, that the nose gear works opposite to the main gear. This require switching the air lines the opposite way on the nose gear from what I did on the main. At first I just went by the port side that extended the main and nose gear. However, I discovered that when the piston rod is extended on the nose gear, it goes up not down. That is why your switching the airlines worked.