Stearns Hydraulic Backstay - SailNet Community

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  #1  
Old 08-13-2002
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Wburton is on a distinguished road
Stearns Hydraulic Backstay

I''m looking for:
a) a repair manual,
b) a repair kit for a Stearn''s Hydraulic backstay on a 1978 C&C 38. And
C) a used replacement hydraulic backstay adjuster.

The cylinder is leaking out of the top and I need to figure out how to take it apart and replace the worn seals, if possible.
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Old 12-16-2003
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Azuer is on a distinguished road
Stearns Hydraulic Backstay

I have the same problem, have you get any solution ? .
I need the instruction plan for repair it.
If you have get any information about it or the way for unarmed the cylinder .
Many thank
fransocas@telefonica.net
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Old 12-17-2003
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Stearns Hydraulic Backstay

I would take a look at replacing your adjuster with a Navtec unit. Back when the Stearns systems were a lower cost alternative to the Navtec, they were nicknamed "Stearns Failing Systems" They had a propensity to go through seals at an alarming rate.

I don''t know about the Stearns, but some of the Navtec cylinders are charged with high pressure nitrogen (600psi) and can only be serviced by a trained professional with special tools.
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Old 01-09-2004
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Stearns Hydraulic Backstay

My advice to you is deep six the thing. It''s outdated vintage tin. there are no manuals or seal kits in existance that I''m aware of.
If you really want to hang on to it, send it to me at Florida Rigging & Hydraulics, and I''ll have a go at it, but You may be better off pursuing a navtec adjuster. I have a few older model adjusters that I might be interested in rebuilding and selling at a reasonable price, or we will meet or beat any price on a new navtec adjuster.

Fair breezes and good sailing!
Buk
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Old 01-12-2004
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Stearns Hydraulic Backstay

The only Navtec cylinders charged with nitrogen are the vangs. The standard cylinders have a pneumatic return charge.
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Old 08-12-2009
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Stearns Hydraulic Backstay

I just had my Stearn back stay re-built at Checker Industrial in Windsor Ontario for 70 bucks. The pressure gauge has the numbers 1 to 4 on it. anybody know what they mean? Max I can hold is 1.5 on my Viking 33 tree trunk.
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Old 08-17-2009
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Smile Stearn Seals

My Stearn Backstay adjuster started leaking from the pump cylinder. Disassembled it and found the seal at the end of the piston in pieces. Does anyone know the part number or where to get a seal.

It looks like the seal includes an o ring that pushes out the seal.

Never seen anything like it before.

If anyone needs help in disassembly instructions, let me know. My unit is 1980's vintage and is very solid.

Thanks
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Old 08-18-2009
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Stearn BackStay Adjuster

I want to thank JohnV for his posting. I contacted Checker Industrial. They were extremely helpful and told us what seal we need. They suggested we lookup a local supply company as the seal is common and it would be easier to get one locally. My wife found a hydraulic repair place locally in MA. They gave her 2 seals and fluid free. They said the seal costs a few dollars and its not worth writing it up.

So, sometimes you don't have to go back to the marine folks and pay marine prices. Hydraulic seals are the same!

Nice to know that there are still great folks out there.

So if your backstay adjuster is leaking from the pump side, a replacement seal and 30 minutes of getting your hands dirty = $1200 to $1800 for a new one.



"Depend only what you can fix yourself. Out there you can only depend on yourself and folks like you"
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Old 03-09-2011
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jackchad- Thanks for your advice and follow up- I have the same issue and need to take mine apart- any advice, lessons learned? I'm not overly mechanical, so I figured I would ask.
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Old 03-09-2011
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I have my Stearns baby stay cylinder apart sitting on my work bench. I blew out the piston seal and scratched the cylinder. Found a shop that had the equipment to hone a 1" cylinder and took the the whole thing up to th local hydraulic shop and he got me every seal needed to put it back together. I'm presently waiting for him to get in a wiper seal and I will put it back together. I have $62 in it so far, $40 for the honing and $22 for the seals.

It came apart pretty easily, mine was put together with thread lock so it was tight but once it broke loose it was fine. The part on the cylinder at the rod is threaded and I just wrapped it in a rag and put it snuggly in a vice. Had the hydraulic shop break loose the rod and piston, didn't want to scar the piston or rod.

I anticipate it going back together and working fine but we will see.

If all goes well I have the back stay and boom vang to look at next.

Marty
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