Cruisers Forum
 


Reply
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 27-09-2018, 05:30   #1
Registered User

Join Date: Jan 2016
Location: Phuket, Thailand
Boat: Beneteau 523
Posts: 37
Navtec A850 boom vang help please

hi, i have a navtec A850 boom vang, its a single hose hydraulic boom vang. it's not building up any pressure, maybe the pump, maybe the hose, maybe the jack, not sure yet.

what i'm not sure about is how it works. normally with a hydraulic jack, it gets longer the more fluid you pump into it, but for the vang, it needs to contract, as you pump fluid in. is this correct?

also, how are you supposed to bleed air from the system? it has no bleed nipples that i can find.

any advice about how to fix my vang appreciated, thanks
steveh2112 is offline   Reply With Quote
Old 05-11-2018, 21:23   #2
Registered User

Join Date: Nov 2018
Location: Winnipeg, Manitoba, Canada
Boat: C&C 37
Posts: 1
Re: Navtec A850 boom vang help please

Barry P here.You are correct about vang pressure working to contract, but you can have 3 problems. Your main pump can be fubar, which would require rebuilding-apparently complicated but possible-a seal kit would be required. Is it possible the hydraulic fluid is low or empty, or is a line from the pump to the vang disconnected and blanked off or a valve on the line shut off. The third possibility is the seals leak so badly they can not overcome the 600 psi nitrogen pressure in the vang (i.e. the pressure that holds up the boom).
If the seals are so shot, they must be replaced, but here is the issue. The boomvang cylinder is highly pressurized (approx. 600 psi), and if the end cap is removed without all the necessary precautions, the shaft shoots out with possible fatal ramifications. It MUST be done correctly, so if you can isolate it to this issue, send it to a rigging shop that has and can do this.
We have this issue on our boat in Western Canada and are looking for an experienced shop to send our vang to. I am told about $300 plus shipping. At least 2-3 rigging shops on East Coast U.S can repair these.- Thanks, Barry from C&C 37, Temptress
Barry_P is offline   Reply With Quote
Old 03-06-2019, 13:12   #3
Registered User

Join Date: Mar 2019
Posts: 7
Re: Navtec A850 boom vang help please

Dear Steve, I am searching for a hydraulics re-builder in Phuket, have you found one? Please let me know and thank you! Kevin



Quote:
Originally Posted by steveh2112 View Post
hi, i have a navtec A850 boom vang, its a single hose hydraulic boom vang. it's not building up any pressure, maybe the pump, maybe the hose, maybe the jack, not sure yet.

what i'm not sure about is how it works. normally with a hydraulic jack, it gets longer the more fluid you pump into it, but for the vang, it needs to contract, as you pump fluid in. is this correct?

also, how are you supposed to bleed air from the system? it has no bleed nipples that i can find.

any advice about how to fix my vang appreciated, thanks
SAILTEC Savitt is offline   Reply With Quote
Old 03-06-2019, 15:08   #4
Registered User

Join Date: Jan 2016
Location: Phuket, Thailand
Boat: Beneteau 523
Posts: 37
Re: Navtec A850 boom vang help please

Parker in boat lagoon, but beware, very expensive, better to do it yourself. P.m. me if you need help
steveh2112 is offline   Reply With Quote
Reply

Tags
boom vang, lease

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Navtec Boom Vang Hydraulic - Leaking avazquez Construction, Maintenance & Refit 35 04-05-2018 15:49
Boomkicker vs Rigid Vang vs 'Soft' Vang finleydc Deck hardware: Rigging, Sails & Hoisting 24 20-06-2013 15:54
For Sale: Hyd. Boom Vang / Outhaul Cylinder-Navtec delmarrey Classifieds Archive 0 04-03-2012 23:08
Need Help Finding a Boom Vang Mast Mount Chuckanut Construction, Maintenance & Refit 2 06-12-2010 19:26
To Vang or not to Vang ihhartley Multihull Sailboats 10 07-12-2006 07:46

Advertise Here


All times are GMT -7. The time now is 04:11.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2022, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2022, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.