Cobra Trailer Screw Jack

[Mike McCarron[_2_]]

I have a screw jack on my 2012 cobra trailer that becomes very difficult to
operate after every 2 or 3 uses in order to jack up my ASW-27B for
disassembly. The glider is operated in a sandy environment and the screws
become dirty quickly. Anyone have any idea about how to avoid the
necessity for frequent cleaning. I have used hydraulic jacks in the past
but I got tired of them leaking and collapsing.

Thanks,

MC

[aerodyne]

Use dry film (NOT WD-40 or similar crap) but real moly disulfide dry
film lube. Molycote 121 IIRC, is a product that comes in a can, one
can will last decades, as long as you don't use any thing else...you
have to be able to completly clean the part free of grease or oil
first...

aerodyne

[Zaphod Beeblebrox]

At 18:46 30 July 2012, Mike McCarron wrote:
>I have a screw jack on my 2012 cobra trailer that becomes very difficult
to
>operate after every 2 or 3 uses in order to jack up my ASW-27B for
>disassembly. The glider is operated in a sandy environment and the
screws
>become dirty quickly. Anyone have any idea about how to avoid the
>necessity for frequent cleaning. I have used hydraulic jacks in the past
>but I got tired of them leaking and collapsing.
>
>Thanks,
>
>MC
>
>
Woah there! Back up a bit and tell me about Cobra hydraulic jack failures -
I've just decided I just upgrade from the screw to the hydraulic, I operate
off grass.
Is there a history of problems with the Cobra hydraulic system? What has
been the experience of other Cobra users?
Anyone care to venture an opinion?

ZB

[[email protected]]

Ahhhhhhhhhhh....New to the forum?
Do a search.
LENGTHY threads on the hydraulic jacks used in Cobra trailers.

[kirk.stant]

On Tuesday, July 31, 2012 9:02:05 AM UTC-5, wrote:
> Ahhhhhhhhhhh....New to the forum? Do a search. LENGTHY threads on the hydraulic jacks used in Cobra trailers.

I replaced a totally worn out (circa 1985)Cobra screw jack with a Cobra hydraulic jack about 3 years ago, time split between midwest and west (desert), and havn't had any problem with leaks, etc.

I do make sure the valve is shut at all times except when lowering the ramp.

I also replaced the big Cobra jack actuating lever with a small butterfly nut. Not as convenient, but not as finicky either, and less chance of munging up the valve.

Bottom line - I love it. So much easier than a screw jack. Highly recommended.

YMMV, of course...

Cheers,

Kirk
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