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Chris
I am going by memory, the gas strut is charged with nitrogen and at a pressure something like hundreds of PSI. Don't quote me on that but it is a lot higher than you would think. Once the correct pressure is applied, the strut operates as expected.
From the service manual:
NOTE
When charging accumulator, pressurize only until door is held open and a 2 to 3 pound force measured with a pull scale is required to start door toward closed.
The way I interpret the above note is; with the friction nut loose, pressurize the door strut to the point that it requires 2 - 3 pounds of force to start the downward motion of the door. Once the door starts to move it should continue down with somewhat less pulling force or on its own. Then adjust the nut as needed to hold the door in the full open position when the door is left open. I would assume most of the doors out there have lost some of the pressure and I know from experience that addition of the correct pressure makes a head scratcher system go away. Check the service manual to be sure of the correct PSI
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Herb R Harney
1968 337C
Flying the same Skymaster for 47 years
Last edited by hharney : 02-04-16 at 04:08 PM.
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