On Jun 19, 7:06*am, "Paul Remde" wrote:
Hi,

I am currently flying it in the U.S. Sports Class Nationals in Parowan, UT,
USA. *The flying here has been spectacular!

I own a small share of a Cobra trailer for our DG-1000 sailplane. *However,
the hydraulic jack used to lift the fuselage of the glider does not seem to
be functioning well. *We can't pump it up to the highest position. *Can you
please offer advice for fixing the issue. *We need to be able to jack it up
to be able to lower the glider's landing gear. *Does it perhaps need more
hydraulic fluid, or does it need to be replaced? *If it needs hydraulic
fluid, what type of fluid should we use, and how to we do the job of putting
it into the unit?

I'm hoping that someone on this group will have a quick suggestion or tip..
It will be easier for me to receive e-mail than to check this group, so
please reply to my e-mail address directly.

Best Regards,

Paul Remde
Cumulus Soaring, Inc.
Serving the soaring communityhttp://www.cumulus-soaring.com
1-952-445-9033

Does it show signs of leaking fluid?

Are you sure the jack close valve fully closes, sometimes the little
lever slips on the valve nut and won't fully close, loosen it and
position it so that you really feel the valve closing firmly, not say
the lever hitting the ground.

If that does not work add some fluid and see if it fixes this. See
http://www.cobratrailer.com/html/service.html

Hydraulic jack fluid should be available at the H & R Home Center/True
Value Hardware or the NAPA parts dealer both not far from the airport.
The small bottles with pointed nozzle designed for for hydraulic jacks
can make it easier to add through the jack hole, otherwise a bottle of
auto transmission fluid will do (but lacks the nozzle tip). Watch the
rubber plug in the jack when you remove/reinstall it, it can fly off
(been there done that) and if you loose it you'll likely be buying
another jack.

If that still does not work try putting some planks of wood under the
scissor assembly that will get it high enough for you but still let
the fuselage roll out the cradle. Otherwise four people with their
backs under the wings and you can lift the rigged glider up enough to
drop the gear.

Failing that you have something worse wrong. I'd take this Chinese POS
jack out and shoot it, ask around, it's Utah, the locals are friendly
and I'm sure some are packing and would appreciate the chance for some
target practice.

Williams Soaring likely has replacement jacks in stock, hate to think
what overnight airfreight will be on that.

Darryl