Dwight,
I've replaced the fluid in my system and it was a pretty easy job to
pump out the old fluid and replace it.
Navtec does sell fluid, but you'd be better off dollar-wise getting
standard hydraulic fluid at most larger auto supply stores. Autozone sells
64-oz bottles at $20. It's the same stuff.
All the best,
Edd
Edd M. Schillay
Starship Enterprise
C&C 37/40+ | Sail No: NCC-1701-B
City Island, NY
Starship Enterprise's Captain's Log Website
On Nov 27, 2012, at 9:06 AM, Joel Aronson <[email protected]> wrote:
Dwight,
Navtec sells a fluid in about a 32 ounce bottle. I only found one rigger in
Annapolis who carried it. Becasue my whole system needed to be flushed and
rebuilt I did not tackle it, but it seems like you should be able to DIY. On
the system that I have there is a reservoir, pump and piston. The fluid was
sticking to the inside of the reservoir, so that had to be replaced too.
I don't know if there is a recommended service interval, but if the fluid is
cloudy I would seriously consider changing it. If you have a newer system that
is all one unit it should be much easier.
Joel
35/3
Annapolis
On Tue, Nov 27, 2012 at 8:47 AM, dwight veinot <[email protected]>
wrote:
Is it recommended to periodically replace the hydraulic fluid in the Navtec
backstay adjusters?
If so is it a DIY project and what is the recommended replacement fluid?
Dwight Veinot
C&C 35 MKII, Alianna
Head of St. Margaret's Bay, NS
From: CnC-List [mailto:[email protected]] On Behalf Of Joel Aronson
Sent: November 26, 2012 11:03 PM
To: [email protected]
Subject: Re: Stus-List Backstay tension
I have the same original unit as Jake. The fluid apparently had never been
changed. It was like molasses instead of looking like vegetable oil. It would
have been cheaper to replace it, but I didn't know that going in, so I had it
all flushed and rebuilt.
If your hydraulic backstay has never been serviced, it may need attention.
Joel
35/3
Annapolis
Sent from my iPad
On Nov 26, 2012, at 7:46 PM, dwight veinot <[email protected]> wrote:
> Jake
>
>
>
> My Navtec adjuster is probably an older unit than what you have. It came to
> me with the boat so I am guessing it is probably around 15 or more years old.
> It is an integral unit and the gage and knob for the relief valve are
> attached on opposite sides near the base of the square looking cylinder. I
> think it reads in psi and its readings correlate quite well at around
> 800-1200 psi when I check backstay tension with my Loos gage but my
> inexpensive Loos gage max’s out at around 1200 on 9/32 wire so it is not
> useful for tension comparisons above that. I have tensioned the backstay
> incrementally to 3000 lbs according to its gage but as I said earlier
> tensions above 1200 psi has no noticeable effect on pointing ability or boat
> speed but a slight effect on weather helm and head stay sag. I spend my
> cruising time fiddling around with a lot of adjustments and measurements but
> I am happy to admit that I am still learning and very interested in what
> others have to contribute.
>
>
>
> I guess I have been lucky that the hydraulic seals have lasted as long as
> they have without problems.
>
>
>
> Dwight Veinot
>
> C&C 35 MKII, Alianna
>
> Head of St. Margaret's Bay, NS
>
> From: CnC-List [mailto:[email protected]] On Behalf Of Jake
> Brodersen
> Sent: November 26, 2012 7:55 PM
> To: [email protected]
> Subject: Re: Stus-List Backstay tension
>
>
>
> Dwight,
>
>
>
> If you Navtec gauge is like mine (in a panel), it probably reads direct
> pressure, not the pressure exerted on the backstay. They would be the same
> if the piston area was 1 sq. inch, but otherwise the pressure times the
> piston area will give you the tension on the backstay.
>
>
>
> Jake
>
>
>
> Jake Brodersen
>
> C&C 35 Mk-III
>
> "Midnight Mistress
>
> Hampton VA
>
>
>
>
>
>
>
>
>
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Joel
301 541 8551
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_______________________________________________
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