Yanmar Transmission Leak - SailNet Community
 
LinkBack Thread Tools
post #1 of 7 Old 03-26-2011 Thread Starter
Junior Member
 
Join Date: Jul 2009
Location: Mississauga
Posts: 6
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
Yanmar Transmission Leak

Wondering if anyone has replaced the rear transmission seal (leaking just before where it couples to the prop shaft) on a Yanmar 3hm35f in a Pacific Seacraft 34. I'm guessing that the tranny will actually need to be removed to do so but was hoping not. I have the service manual but it is not as detailed as hoped. It appears to me that the tranny case cannot be removed without removing the two rear engine mounts as well.
Also wondering if anyone might have had experience, either good or bad, with a stop leak product.
Thanks in advance for any input.
LM
RLMToronto is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #2 of 7 Old 03-26-2011
Junior Member
 
Join Date: Feb 2010
Location: Mobile, AL
Posts: 20
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
Did that on my Endeavour32 with a 2QM20. Not too bad a job. Just mark the coupling and slide it back a little. Then remove the coupling from the transmission. You can then pop the seal with a screwdriver. Take the seal to a bearing shop and they can usually read the number on the seal and give you a rePlacement for about 5$. Reverse the process to install. The worst part is the limited room to work in the engine room. Look at a parts manual to see how it all works. Not too bad anon if you are a wrench type person. Make sure you have plenty of rags aand a small container to catch the old oil so that it does not go all over your bilge area.

Endeavour 32
bfloyd825 is offline  
Quote Quick Reply Share with Facebook
post #3 of 7 Old 03-26-2011
Senior in age only!!!
 
centaursailor's Avatar
 
Join Date: Nov 2010
Location: Balbriggan
Posts: 554
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 5
 
Sounds like a sound plan. You could remove the oil before starting with a pump to save spillage and possible contamination.
Check there are no rough spots along the shaft prior to reassembly as the seal face is very sensitive. Some clean oil on the shaft will also help. Rotate the seal as you push forward will help keep the seal face from jamming and getting damaged or nicked.
Safe sailing

The great appear great because you are on your knees. James Larkin, Irish Labour Movement.
centaursailor is offline  
Quote Quick Reply Share with Facebook
post #4 of 7 Old 03-27-2011 Thread Starter
Junior Member
 
Join Date: Jul 2009
Location: Mississauga
Posts: 6
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
Progress

Thanks for your suggestions. I got the coupling off of the shaft today, which exposes the seal and it does indeed look like it will pop out the back. Will attempt to do so later this week. I was surprised to see that the seal runs against the coupling itself, not output shaft.
Also took the stuffing box off, as I need to push the cutlass bearing down/back. There were no locking pins to keep it in place so I guess it worked its way up a bit. The rubber part of the stuffing box seems to be in good shape. Is it wise to replace it at this point regardless? The boat is a 1990 and I suspect this is original equipment.
Thanks.
RLMToronto is offline  
Quote Quick Reply Share with Facebook
post #5 of 7 Old 03-28-2011
Junior Member
 
Join Date: Feb 2010
Location: Mobile, AL
Posts: 20
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
The cutlass bearing on my Endeavour has 2 small set screws that hold it in. You may have to clean the strut some to find them.

Endeavour 32
bfloyd825 is offline  
Quote Quick Reply Share with Facebook
post #6 of 7 Old 03-28-2011 Thread Starter
Junior Member
 
Join Date: Jul 2009
Location: Mississauga
Posts: 6
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
The PS Crealock doesn't use a strut, it is a tube built into the structure, but the same idea. Mine currently has two holes for the set screws, but no set screws, and I can see the cutlass bearing up inside the tube about an inch. So I need to push it down from the inside using some 1" pvc tubing over the shaft. (As described in some other posts right here on Sailnet.)
RLMToronto is offline  
Quote Quick Reply Share with Facebook
post #7 of 7 Old 03-28-2011
Senior Member
 
casey1999's Avatar
 
Join Date: Oct 2010
Location: HI
Posts: 3,279
Thanks: 18
Thanked 45 Times in 44 Posts
Rep Power: 5
 
Yanmar V Drive

Would any of you know how the oil seal is arranged on a yanmar Kanzaki v-drive? I have the 3gmd. Looks like boat prop shaft goes through a hole in the transmission then attaches to the engine coupling. I cannot even understand how the rotation is transferred to the shaft let alone what type of oil seal there would be.
Thanks
casey1999 is offline  
Quote Quick Reply Share with Facebook
Reply

Quick Reply
Message:
Options

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Register Now



In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.


User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
Yanmar 2GM Oil leak bclay3 Diesel 8 06-19-2010 09:25 PM
Yanmar 2GMF Transmission Oil? dacap06 Gear & Maintenance 4 04-19-2010 11:03 PM
Yanmar 3gm30 transmission olepedersen@yahoo.com Gear & Maintenance 7 10-06-2008 11:10 AM
yanmar transmission rbtpfe9 Gear & Maintenance 0 09-06-2005 10:46 AM
Yanmar oil leak rskaug Gear & Maintenance 0 01-04-2004 07:08 PM

Posting Rules  
You may post new threads
You may 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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome