Servicing Cobra Hydraulic foot pumps

[mike pitoniak]

Greetings,

Can anyone tell me what type of oil to put in the Cobra hydraulic
foot pump, and where to add it? There are several fittings, and i am
not sure if it matters where it goes.

Thanks in advance,

mike

[A. Spindelberger]

(mike pitoniak) wrote in message >...
> Greetings,
>
> Can anyone tell me what type of oil to put in the Cobra hydraulic
> foot pump, and where to add it? There are several fittings, and i am
> not sure if it matters where it goes.
>
> Thanks in advance,
>
> mike

There is a little plastic plug on the top side of the cylinder.
Open this plug with a screwdriver and fill oil in.
Every hydraulic oil or oil for automatic gearboxes from cars is fine.
Regards AS

[Andy Durbin]

(mike pitoniak) wrote in message >...
> Greetings,
>
> Can anyone tell me what type of oil to put in the Cobra hydraulic
> foot pump, and where to add it? There are several fittings, and i am
> not sure if it matters where it goes.
>
> Thanks in advance,
>
> mike

Small black rubber plug in the middle of the large cylinder. Don't
over fill or the plug will pop out when the jack is lowered. I use
hydraulic jack oil available from autoparts stores.

Andy

[JJ Sinclair]

Mike,
It's DOT-3, don't use the red stuff (5606)

My jack stopped leaking when I stopped lifting the jack from the top, when
putting it back in the trailer. This can cause the ram to be pulled out and it
doesn't like that. Pick it up from the bottom.
JJ Sinclair

[Stewart Kissel]

Mr Spindleberger-

I have a January order for some replacement gas struts
for my Cobra that have not arrived. The major US soaring
supplier I ordered them through has not heard from
you on this matter, nor have my emails to you been
answered. Perhaps they are being caught in your spam
filter? The specs are as folllows:
HAHN-Gasfedern GmbH
N-750
Art.-Nr.-249429
Herst.-Dat.-26.06.02
These are replacements for struts I purchased last
spring, which failed this fall. Unable to safely open
my trailer without them and soaring season is starting
up.
Sorry to trouble the rest of ras with the post, but
running out of options here.

[Stewart Kissel]

Cobra sent me an email. The problem *appears* to be
on the USA side of the pond. Problem unresolved however.
Standby for a major diatribe if I have to use block
and tackle however.
Once again sorry about posting private affairs.






At 14:48 08 March 2004, Stewart Kissel wrote:
>Mr Spindleberger-
>
>I have a January order for some replacement gas struts
>for my Cobra that have not arrived. The major US soaring
>supplier I ordered them through has not heard from
>you on this matter, nor have my emails to you been
>answered. Perhaps they are being caught in your spam
>filter? The specs are as folllows:
>HAHN-Gasfedern GmbH
>N-750
>Art.-Nr.-249429
>Herst.-Dat.-26.06.02
>These are replacements for struts I purchased last
>spring, which failed this fall. Unable to safely open
>my trailer without them and soaring season is starting
>up.
>Sorry to trouble the rest of ras with the post, but
>running out of options here.
>
>
>
>

[bumper]

JJ,

DOT-3 is one of the common automotive brake fluids. It's glycol ether based
and this stuff will trash the seals in your hydraulic jack, which should
have a petroleum based oil. (EPDM seals for DOT-3 vs. BUNA-N for petro)

Jack oil is available at tool stores or a lifetime supply of hydraulic oil
can be purchased in 5 gallon pails at tractor places and is reasonably
priced.
--
bumper ZZ (reverse all after @)>
"Dare to be different . . . circle in sink."

"JJ Sinclair" > wrote in message
...
> Mike,
> It's DOT-3, don't use the red stuff (5606)
>
> My jack stopped leaking when I stopped lifting the jack from the top, when
> putting it back in the trailer. This can cause the ram to be pulled out
and it
> doesn't like that. Pick it up from the bottom.
> JJ Sinclair

[mike pitoniak]

(JJ Sinclair) wrote in message >...
> Mike,
> It's DOT-3, don't use the red stuff (5606)
>
> My jack stopped leaking when I stopped lifting the jack from the top, when
> putting it back in the trailer. This can cause the ram to be pulled out and it
> doesn't like that. Pick it up from the bottom.
> JJ Sinclair

Thanks for suggestion JJ. This makes sense, and I am guilty of doing
exactly what you mention. When i was working on the pump the other
night i was surprised that the pump piston comes out if you pull up
too far.

mp

[A. Spindelberger]

(JJ Sinclair) wrote in message >...
> Mike,
> It's DOT-3, don't use the red stuff (5606)
>
> My jack stopped leaking when I stopped lifting the jack from the top, when
> putting it back in the trailer. This can cause the ram to be pulled out and it
> doesn't like that. Pick it up from the bottom.
> JJ Sinclair

The bolt in the middle of the scissor should be tightened a little.
Then you can lift it from the top without pulling the piston out of
the cylinder
AS

[A. Spindelberger]

Stewart Kissel > wrote in message >...
> Cobra sent me an email. The problem *appears* to be
> on the USA side of the pond. Problem unresolved however.
> Standby for a major diatribe if I have to use block
> and tackle however.
> Once again sorry about posting private affairs.
>
>
>
>
>
>
> At 14:48 08 March 2004, Stewart Kissel wrote:
> >Mr Spindleberger-
> >
> >I have a January order for some replacement gas struts
> >for my Cobra that have not arrived. The major US soaring
> >supplier I ordered them through has not heard from
> >you on this matter, nor have my emails to you been
> >answered. Perhaps they are being caught in your spam
> >filter? The specs are as folllows:
> >HAHN-Gasfedern GmbH
> >N-750
> >Art.-Nr.-249429
> >Herst.-Dat.-26.06.02
> >These are replacements for struts I purchased last
> >spring, which failed this fall. Unable to safely open
> >my trailer without them and soaring season is starting
> >up.
> >Sorry to trouble the rest of ras with the post, but
> >running out of options here.
> >
> >There are some mails disappeared in the last weeks because of virus/ worm/spam filters on both sides of the pond.
I'm in contact with John and will send some replacement struts tomorrow morning.
Sorry! AS
FAX# 0114956658115 Phone 0114956657044
> >
> >

[JJ Sinclair]

>
>The bolt in the middle of the scissor should be tightened a little.
>Then you can lift it from the top without pulling the piston out of
>the cylinder
> AS

Thanks Al,
The problem I had was with a 2-jack set-up on my ASH-25 trailer.

Should we be using DOT-3 automotive brake fluid in your jacks?
JJ Sinclair

[A. Spindelberger]

(JJ Sinclair) wrote in message >...
> >
> >The bolt in the middle of the scissor should be tightened a little.
> >Then you can lift it from the top without pulling the piston out of
> >the cylinder
> > AS
>
> Thanks Al,
> The problem I had was with a 2-jack set-up on my ASH-25 trailer.
>
> Should we be using DOT-3 automotive brake fluid in your jacks?
> JJ Sinclair

No brake fluid ,please.
Just hydraulic oil or oil from automatic hydraulic car gears gears.
AS

[JJ Sinclair]

>
>No brake fluid ,please.
>Just hydraulic oil or oil from automatic hydraulic car gears gears.
>AS

Oops, I stand corrected.

I would like to thank you for making a real quality product. Your fully
fumctional trailers make assembling and disassembling the glider a joy, not a
burden. Only those who have owned a dysfunctional trailers, can really
appreciate the Cobra.
Keep up the good work,
JJ Sinclair

[R Barry]

> No brake fluid ,please.
> Just hydraulic oil or oil from automatic hydraulic car gears gears.
> AS

What Al means is ATF a.k.a. automatic Trans Fluid is ok