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 20-05-2011, 13:32   #1
Registered User

Join Date: May 2011
Location: Alaska
Boat: Roberts TY 43
Posts: 13
Replacement of Lofrans Electric Motor with Hydraulic

I have spent some years "cruising" through forums, hardly posting. But in my research for this project there was no discussion about this type of conversion. So, I decided to register and give back to the collective...

My windlass is a Falkon with 12VDC 1.5kW motor. I just added a belt driven VTM clutch pump to the main, primarily for this windlass and a pot hauler. There is plenty of aversion to using hydraulics from what I read of other's opinions. Here is how I arrived at removing the electric motor...

After a sleepless night on the hook, blowing 25-30kts with caps, swinging around between three other boats, two of them dragging, I hauled the anchor. The batteries must have been strained. I knew the short run to another bight would add some capacity, but I did not expect the resulting failure of ample capacity to restart the main a day later. No problem, start the aux, and charge away for a while...then realize the alternator is not putting out and replace it with a spare. After some more aux run time, I had enough juice to coax the cummins back to life. This was almost a three day event, and really messed up some good fishing time.

I have since completely rebuilt the battery system on board, but I have never been excited about having to re-set an anchor, and have limited my ops to only one down/up of ground tackle per day.

Existing electric motor works out to about 2hp at 2400 rpm on a 4:75 worm consuming around 80-150A. This is about 65 lb-in of torque at the motor.

Using Parker hydraulic motor MGG2-16, I expect to be able to idle the main and have similar output torque from the hydraulic motor. Also, I have additional flow and pressure capacity to provide 3750 rpm, 75 lb-in torque, around 4 hp.

The one issue I am down to now, is the custom mounting plate to go from metric electric motor mount to SAE 4-bolt, and a short jack shaft to adapt the motor to the worm gear. There seems to be plenty of room.

I chose to install a spool valve, mounted so handle goes up/down, that is spring return to center after up, but friction detent down. This way I can clutch out the wildcats, and use the gypsy without hand on valve. Hauling in would always require hand on valve.

The boat is a heavy steel Roberts, with all chain rode, so it's getting up there in weight. Just thought I would offer up my thoughts, in case anyone else was considering this type of conversion.

Brett.
Attached Thumbnails
Click image for larger version

Name:	IMAG0142.jpg
Views:	321
Size:	68.2 KB
ID:	27597  
Norskip is offline   Reply With Quote
Old 21-05-2011, 05:26   #2
Senior Cruiser
 
GordMay's Avatar

Cruisers Forum Supporter

Join Date: Mar 2003
Location: Thunder Bay, Ontario - 48-29N x 89-20W
Boat: (Cruiser Living On Dirt)
Posts: 49,740
Images: 241
Re: Replacement of Lofrans Electric Motor with Hydraulic

Greetings and welcome aboard the CF, Brett.
__________________
Gord May
"If you didn't have the time or money to do it right in the first place, when will you get the time/$ to fix it?"



GordMay is offline   Reply With Quote
Old 01-06-2011, 15:06   #3
Registered User

Join Date: May 2011
Location: Alaska
Boat: Roberts TY 43
Posts: 13
Re: Replacement of Lofrans Electric Motor with Hydraulic

Here is what the hydraulic motor mount looks like before installation. I had some success over the weekend and started hauling some chain, then a leak developed in some of the fittings. The clearances are so close that I have to remove the windlass again to access the fittings, so I had the pleasure of retrieving 225' of chain with the manual lever...45 minutes later the anchor was on board. That sucked.

I'll post a picture of the final installation when I get the fitting tightened.

BTW, I chose to use a soy based hydraulic oil, which is non-toxic and biodegradable. I'm glad I made the choice, even though it costs twice as much.

I can't say this was any cheaper, and electric is cleaner. I will say that I know there will be no electrical issues. The windlass seems to run a bit faster, but I'm not sure how well it pulls yet.
Attached Thumbnails
Click image for larger version

Name:	IMAG0164.jpg
Views:	236
Size:	54.1 KB
ID:	27969  
Norskip is offline   Reply With Quote
Old 01-06-2011, 15:28   #4
cat herder, extreme blacksheep

Join Date: Jul 2008
Location: furycame alley , tropics, mexico for now
Boat: 1976 FORMOSA yankee clipper 41
Posts: 18,967
Images: 56
Re: Replacement of Lofrans Electric Motor with Hydraulic

welcome, brett--i am trying to trade my lofrans 1000 for another manual--i have one already but i want another.. am a greedy zeehag...LOL
zeehag is offline   Reply With Quote
Old 06-09-2011, 22:10   #5
Registered User

Join Date: May 2011
Location: Alaska
Boat: Roberts TY 43
Posts: 13
Re: Replacement of Lofrans Electric Motor with Hydraulic

Well, after a summer of using the hydraulic conversion to the windlass, I'm happy to say that, well, I'm happy. I had to chase a couple of startup leaks, but things seem to be holding together.

I added a selector valve to either the windlass valve or quick disconnects to a hydraulic hauler on an aluminum davit. No problem setting and retrieving the anchor multiple times in a day.

Bottom line; not cheap, somewhat messy, no worries about over using the capacity like an electric windlass, and it made sense because I had more than one use for fluid power.

Sure beats using the handle! (sorry Zeehag)
Attached Thumbnails
Click image for larger version

Name:	IMAG0168b.jpg
Views:	219
Size:	80.5 KB
ID:	31269  
Norskip is offline   Reply With Quote
Old 07-09-2011, 07:38   #6
cat herder, extreme blacksheep

Join Date: Jul 2008
Location: furycame alley , tropics, mexico for now
Boat: 1976 FORMOSA yankee clipper 41
Posts: 18,967
Images: 56
Re: Replacement of Lofrans Electric Motor with Hydraulic

's ok norskip--- handle is good for aerobic exercise. i just dont like electric as those fail in worst moments. keep me posted about this conversion--i may do that with my electric instead of selling it..mebbe.....
zeehag is offline   Reply With Quote
Reply

Tags
electric motor, lofrans, motor

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
Electric tender motor GlendaJay Auxiliary Equipment & Dinghy 12 25-12-2013 09:15
Electric Motor Temperature? Extemporaneous Electrical: Batteries, Generators & Solar 12 04-08-2012 01:37
Want To Buy: Lofrans Tigres Windlass Motor ouat41 Classifieds Archive 3 18-03-2010 19:09
Electric Motor on a Dinghy kcmarcet Auxiliary Equipment & Dinghy 8 23-11-2009 22:32
Which is more reliable: electric or hydraulic? learningcurve Deck hardware: Rigging, Sails & Hoisting 28 01-06-2007 05:43

Advertise Here


All times are GMT -7. The time now is 17:04.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.