Cruisers Forum

Join CruisersForum Today

Thread Tools Rate Thread Display Modes
Old 31-05-2015, 18:59   #1
Registered User

Join Date: Aug 2011
Posts: 2
Shaft Alignment with V-drive Transmission

High all

I have a new shaft, Gori, and Cutless bearing. My transmission is a V-drive.

On the hard before launch I centered the shaft in the shaft log and then aligned the coupling on the V-Drive to the coupling on the shaft. Next I installed my PSS shaft seal and tighted the shaft coupling to the transmission coupling.

After being in the water for more than a week I have a lot of vibration in the drive train.

My question is now that I am in the water how do I go about re aligning, when the PSS shaft seal is pushing the shaft couplings apart when I back out the coupling flange bolts? Can I just back the bolts a little and do the alignment?

Any comments

Outback is offline   Reply With Quote
Old 31-05-2015, 19:47   #2

Join Date: Feb 2013
Location: Boat is on the Rio Dulce
Boat: Seafarer36c
Posts: 3,584
Re: Shaft Alignment with V-drive transmission

Many boats with a fin keel need to be aligned in the water. They are kinda flexable and on stands they may not sit straight.
I do my alignment checks with the bolts still in the flanges but backed off a bit so you can get a feeler gauge in there.

Guy is offline   Reply With Quote
Old 01-06-2015, 00:28   #3
Senior Cruiser

Cruisers Forum Supporter

Join Date: May 2013
Location: Oregon to Alaska
Boat: Wheeler Shipyard 83' ex USCG
Posts: 1,113
Re: Shaft Alignment with V-drive Transmission

If you have a lot of vibration your alignment is way off. That will quickly eat gears, bearings or both. I've also seen shafts break where it goes into the flange.
You should have a flange on each shaft of the V drive. Do the one going to the stern bearing 1st. Slack the bolts enough so flange is not quite touching at the tight spot. Slide in feeler gauges until you get an accurate reading. Then find the loosest spot. You'll have to slack the V drive mount so you can move it or shim it to make the flange within .002" all the way around. Then tighten the V drive mounting bolts, double check the flange, tighten the bolts and go on to the other flange. This time you have to move or shim the engine to align it to the V drive. It can be time consuming, but doable. Sometimes you'll have everything fine until you tighten everything down and then find you're still off. Double check until your flanges are aligned.
Lepke is offline   Reply With Quote
Old 01-06-2015, 04:16   #4
Moderator Emeritus
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: 29,391
Images: 240
Re: Shaft Alignment with V-drive Transmission

Greetings and welcome aboard the CF, Outback.
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 01-06-2015, 09:15   #5
Registered User
duefocena's Avatar

Join Date: Aug 2010
Location: Newport Beach, CA.
Boat: TPI Lagoon Catamaran 42'
Posts: 222
Images: 1
Re: Shaft Alignment with V-drive Transmission

Outback, what make of V drive do you have? I have Hurth V drives that attach directly to the bell housing without separate mounts. I too have PSS seals. I remove the 4 bolts holding the flanges together and spin the shaft to insure no binding. I then measure flange concentric for even distance adjusting engine mounts to adjust. When even, I tighten engine mounts, measure again and then tighten flange bolts.
duefocena is offline   Reply With Quote
Old 01-06-2015, 12:35   #6
Senior Cruiser
skipmac's Avatar

Cruisers Forum Supporter

Join Date: Oct 2007
Location: 29 49.16 N 82 25.82 W
Boat: Pearson 422
Posts: 11,239
Re: Shaft Alignment with V-drive Transmission

Answer will probably depend on what V-drive and transmission you have.

I have a Westerbeke W58, Borg-Warner Velvet Drive transmission and a Walter V-drive. My V-drive is mounted directly to the transmission and except for the color difference would look like one large unit with the transmission. It has six adjustable motor mounts, two on each part of the drive train.

I contacted Walter to ask how to do the alignment. They checked the serial number of the drive and claimed the drive had no motor mounts but mine clearly does so they speculate they were added by the builder.

Point being, in this setup the mounts on the V-drive are redundant. Do the alignment with the four motor mounts on the engine and transmission with the mounts on the V-drive loose. Once the alignment is right snug up the bolts on the V-drive just enough to add a little support to the back end.

Other V-drives could be very different. Some Walter models connect to the transmission with a short drive shaft with universal joints so the alignment would be done at the V-drive instead of the engine/transmission.
The water is always bluer on the other side of the ocean.
skipmac is online now   Reply With Quote
Old 01-06-2015, 18:07   #7
Registered User

Join Date: Aug 2011
Posts: 2
Re: Shaft Alignment with V-drive Transmission

Thanks GordMay for the greeting and thank you to all the forum members who have answered.

I have a ZF/Hurth v-drive which I installed two years ago after Hurth HBW 150 transmission failure. I also changed the four engine mounts at the same time. The setup is the same as duefocena's.

Today I backed off the flange bolts and checked the distance with feeler gauges. I didn't see any significant problem. As far as I could tell It is within a thousand or so. I am wondering if something is fouled on the shaft or perhaps the new GORI 2 blade is causing the vibration.

The vibration is really penetrating unlike the vibration I experienced prior to alignment, two years ago after the the transmission and motor mounts were installed.

duefocena, when you take the flange bolts out, how do you keep pressure on the PSS rotor to keep the water gushing in? This a concern for me. I don't know what to expect.

Thanks all, I will be back at it tomorrow.

Outback is offline   Reply With Quote
Old 02-06-2015, 05:18   #8
Registered User

Join Date: Aug 2013
Location: panama
Boat: solaris 42 1978
Posts: 165
Re: Shaft Alignment with V-drive Transmission

i have an older yanmar motors and the borg warner v drives which is most difficult tp work on .. we removed the motor to rebuild but actually removed the mounts with the motor and reinstalled same location i done have lot of vibration .. when i asked the mechanic said we dont need to check alignment ??? i know how difficult it is to gwt to the coupling bolts and there is a wire running through that is hard to reinstall but should i force the issue ???
svfraidknot is offline   Reply With Quote
Old 03-06-2015, 15:00   #9
Registered User

Join Date: Nov 2014
Posts: 394
Re: Shaft Alignment with V-drive Transmission

Here is something you can try....

Back off the coupling bolts a bit and place a single feeler gauge blade say .015" thick at 6 o'clock position between the flanges and clamp it between the flanges lightly with vice grips or a small C clamp. Then remove the bolts the rest of the way. Now take your .012", .013", .014" .016", .017" etc. blades and measure the gap at 12, 3, 9 o'clock in the normal fashion. Adjust the engine as necessary to get acceptable alignment. Rule of thumb might be .001" of misalignment per inch of flange diameter.


DougR is offline   Reply With Quote

men, transmission

Thread Tools
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
V-Drive alignment skipmac Engines and Propulsion Systems 1 23-10-2012 10:56
Aqua Drive and Shaft Alignment wingover Propellers & Drive Systems 12 15-06-2011 15:24
Strut, Shaft, Shaft Log, Engine Alignment KestrelBuck Engines and Propulsion Systems 24 03-04-2011 23:14
For Sale: Leyland 1.6lL Diesel, Borg Warner Velvet Drive Transmission, and Walter V-Drive Journeyman Classifieds Archive 0 03-03-2011 16:19
Drive shaft,Transmission noise when cold. highseas Propellers & Drive Systems 31 18-12-2008 17:22

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities

Copyright 2002-2015 Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 11:36.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.