Cruisers Forum
 


Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 03-07-2022, 17:24   #1
Registered User
 
PJHoffnet's Avatar

Join Date: Feb 2017
Location: Merritt Island, FL
Boat: 1999 Maxum 4100 SCA
Posts: 123
Request help with rudder feedback unit

BLUF: Looking for a hand with replacing the ‘arm’ of a Simrad RF300 rudder feedback unit/full replacement of the unit.

I have a Simrad RF300 rudder feedback unit that could not withstand the tremendous weight of my fat gut contacting it the a couple of months ago when I was doing some work on a nearby underwater light connection. I’ve worked in that ‘tight hole’ area before and was careful not to put any body part over the unit, but wasn’t careful enough this time and the ‘arm’ snapped off pretty darn close to the rotating top piece.

Yupp, stupid me. Oh well, JB weld has done a good job holding it together until this past weekend when I did a really fast wheel spin at the helm to avoid a ‘late seen’ crab pot. Crab pot survived, but the arm snapped at the repair line.

So, I went on Ebay and ordered a new arm, but when I went to scout out how to remove the old arm, I couldn’t get the ??? ‘set screw’ ??? in the middle of the arm to come loose. In fact, the ‘head’ of the screw snapped right off. Perhaps I was removing the piece incorrectly.

OK, before this drifts too far into TLDR territory, 1) Anyone have any insight into how to remove the screw/top rotating part of the unit? 2) If I decide that isn’t going to work, and I replace the unit, can I simply cut and splice the new unit to the existing cable, or do I need to re-run the entire length?
PJHoffnet is offline   Reply With Quote
Old 03-07-2022, 18:39   #2
Registered User

Join Date: Jun 2013
Location: canada
Posts: 4,056
Re: Request help with rudder feedback unit

I have never tried to pull an arm off. it would need to be aligned to the base when installed somehow. otherwise the centering tabs would not line up. hopefully there is a notch or something so it can only go on facing one way?

you can just cut and splice the wires.
smac999 is offline   Reply With Quote
Old 04-07-2022, 06:33   #3
Registered User
 
PJHoffnet's Avatar

Join Date: Feb 2017
Location: Merritt Island, FL
Boat: 1999 Maxum 4100 SCA
Posts: 123
Re: Request help with rudder feedback unit

Quote:
Originally Posted by smac999 View Post
... hopefully there is a notch or something so it can only go on facing one way?
The top rotating arm and the base both have alignment notches scribed on their exterior. Not sure if there is a physical alignment notch.


Quote:
Originally Posted by smac999 View Post
...you can just cut and splice the wires.
Thanks, I was hoping for that. Having already run a few wires from the bilge to the helm on this boat, I was hoping to avoid that fun.
PJHoffnet is offline   Reply With Quote
Old 11-07-2022, 10:32   #4
Registered User
 
ilCigno's Avatar

Join Date: Oct 2011
Location: The Netherlands
Boat: Compromis 888 (29ft)
Posts: 103
Images: 2
Re: Request help with rudder feedback unit

2) Yes, you can cut and splice. Rudder reference sensors are in fact potentiometers. A certain resistance is corresponding with a certain rudder angle. By splicing the cable resistance might change a little. I suggest to rerun the initiation proces of your autopilot afterwards.
__________________
Timo
ilCigno is offline   Reply With Quote
Old 11-07-2022, 12:48   #5
Registered User

Join Date: Nov 2018
Location: Panama
Boat: Norseman 447
Posts: 1,460
Re: Request help with rudder feedback unit

Not all rudder position sensors are simple potentiometers. Some Simrad units had a variable frequency output. Others are NMEA 2K devices. Splicing the wires should make any difference though. Both my old Simrad, an even older Robertson, and a B&G supplied "network" connected rudder sensors.
Bycrick is offline   Reply With Quote
Old 16-07-2022, 14:32   #6
Registered User

Join Date: Jun 2013
Location: canada
Posts: 4,056
Re: Request help with rudder feedback unit

Quote:
Originally Posted by PJHoffnet View Post
The top rotating arm and the base both have alignment notches scribed on their exterior. Not sure if there is a physical alignment notch.
.
yes but you can't use those to reattach the top. those notches are used to mount it in the boat. if you reattach the top offset these 2 outside notches would also be offset by the same amount
smac999 is offline   Reply With Quote
Old 16-07-2022, 16:00   #7
Registered User
 
deblen's Avatar

Join Date: Oct 2014
Location: Grand Manan,N.B.,Canada N44.40 W66.50
Boat: Mascot 28 pilothouse motorsailer 28ft
Posts: 2,504
Images: 1
Re: Request help with rudder feedback unit

Quote:
Originally Posted by Bycrick View Post
Not all rudder position sensors are simple potentiometers. Some Simrad units had a variable frequency output. Others are NMEA 2K devices. Splicing the wires should make any difference though. Both my old Simrad, an even older Robertson, and a B&G supplied "network" connected rudder sensors.

Indeed. https://www.electro-tech-online.com/.../#post-1142950
Cheers/Len
__________________
My personal experience & humble opinions-feel free to ignore both
.
deblen is offline   Reply With Quote
Reply

Tags
rudder

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
For Sale: Simrad RF300 rudder feedback unit Rowglide General Classifieds (no boats) 5 25-08-2020 03:30
Navman Rudder Feedback Unit Pacey16 Marine Electronics 10 05-07-2019 06:47
Simrad Rudder Feedback Unit RF 300 HELP! islandfeverJim Marine Electronics 1 06-08-2015 05:15
Replacing Simrad RF300 Rudder Feedback Unit Uncle Buck Marine Electronics 3 24-08-2011 18:41
Solar Mockup feedback request dkall Construction, Maintenance & Refit 5 18-07-2008 18:05

Advertise Here


All times are GMT -7. The time now is 22:32.


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.