Jay Honeck wrote:

He says that it's SOP to apply brake fluid to the struts of the DC-9s
he services (at his day job) every, single time they park. It's
messy, as a result, but their strut seals rarely need to be replaced.

Interesting as we did just the opposite with exposed cylinders on the
logging equipment I operated many moons ago. Any oil just collected
dust and formed an abrasive slurry that wass very hard on the seals. I
guess most airplanes probably don't pick up that much dirt normally, but
if I operated from a gravel or dirt strip I'd think twice before
oiling the strut cylinder.


Matt