Working on your inner primary...? Don't do what I did! - Harley Davidson Forums



Primary/Transmission/Driveline/Clutch Find answers to general powertrain, primary and transmission. Have clutch issues and need suggestions? Post them here.
Sponsored by:
Sponsored by:

Working on your inner primary...? Don't do what I did!

Reply
 
 
 
P
 
Thread Tools Search this Thread
  #1  
Old 05-13-2017, 04:34 PM
Nexus9's Avatar
Nexus9 Nexus9 is offline
One Of The Regulars
Thread Starter
Join Date: Feb 2010
Location: Prospect, CT
Posts: 165
Thanks: 0
Thanked 10 Times in 5 Posts
Default Working on your inner primary...? Don't do what I did!

My inner primary mainshaft bearing on my 2008 Ultra was noisy, so over the winter, I decided to install a new bearing using a Drag Specialties kit. It had been a few years since the last time I had the inner primary off, and since I had plenty of time, I decided to do the job in the evenings after work.
Come spring, and off I go for my first (quiet) ride - but the next morning there was an oil puddle under the primary. Whaaaaat...?
At first I thought it was the shift shaft seal, then, maybe the starter o-ring had curled when I inserted it; but when I took it all apart again I saw what I had done - put the primary bearing oil seal in frontwards - which is backwards!
Both the service manual and the OEM Harley seal remind you that the "rubber" side of the seal is the "oil side" (facing the clutch, not the starter). But since I didn't have either, I installed the seal in the normal way with the rubber side out.
So I'm just passing this along to my fellow riders in hopes that maybe I'll save one or two people the same fate. It seems odd to install a seal with the rubber in and the back of the seal showing, but that's the way it goes.
Take a look at the photos and don't do what I did!
Attached Thumbnails
Working on your inner primary...?  Don't do what I did!-0429171357.jpg   Working on your inner primary...?  Don't do what I did!-0429171410.jpg  
Reply With Quote
The Following User Says Thank You to Nexus9 For This Useful Post:
F150HD (05-14-2017)
  #2  
Old 05-14-2017, 10:26 AM
Yankee Dog's Avatar
Yankee Dog Yankee Dog is offline
Road Captain
Join Date: Apr 2007
Posts: 746
Thanked 41 Times in 40 Posts
Default

A good rule of thumb is spring towards the side that has the oil. YD
Reply With Quote
  #3  
Old 05-14-2017, 09:49 PM
F150HD's Avatar
F150HD F150HD is offline
Senior Rider
Join Date: Mar 2011
Location: MN
Posts: 372
Thanked 13 Times in 12 Posts
Default

Quote:
Originally Posted by Nexus9 View Post
My inner primary mainshaft bearing on my 2008 Ultra was noisy, so over the winter, I decided to install a new bearing using a Drag Specialties kit. It had been a few years since the last time I had the inner primary off, and since I had plenty of time, I decided to do the job in the evenings after work.
Come spring, and off I go for my first (quiet) ride - but the next morning there was an oil puddle under the primary. Whaaaaat...?
At first I thought it was the shift shaft seal, then, maybe the starter o-ring had curled when I inserted it; but when I took it all apart again I saw what I had done - put the primary bearing oil seal in frontwards - which is backwards!
Both the service manual and the OEM Harley seal remind you that the "rubber" side of the seal is the "oil side" (facing the clutch, not the starter). But since I didn't have either, I installed the seal in the normal way with the rubber side out.
So I'm just passing this along to my fellow riders in hopes that maybe I'll save one or two people the same fate. It seems odd to install a seal with the rubber in and the back of the seal showing, but that's the way it goes.
Take a look at the photos and don't do what I did!
are those 2 pics the same side of the inner primary? trying to identify what specifically is the seal in the pic that was put in backwards
Reply With Quote
  #4  
Old 05-15-2017, 08:59 AM
Max Headflow's Avatar
Max Headflow Max Headflow is online now
Outstanding HDF Member
Join Date: Dec 2005
Location: poway
Posts: 2,556
Thanked 220 Times in 198 Posts
Default

Good post. Another thing to add is that if you look at the seal the rubber sealing part is offset from the outside ring. The offset needs to be to the bearing side. Some after market seals are flat.. They will start to leak after a few thousand miles. When flat they are installed with the rubber side out. One problem that occurs is that since they are flat the outer lip may not run on the inner bearing sleeve. Dirt / water can get into the sleeve and rust / trash the inner bearing surface. The rough surface then eat the seal and it leaks..

The bearing kits from drag are pretty good. They have the new type offset seal but as shown by the OP they get installed kinda backwards from what you'd normally think.
Reply With Quote
  #5  
Old 05-19-2017, 07:26 PM
Nexus9's Avatar
Nexus9 Nexus9 is offline
One Of The Regulars
Thread Starter
Join Date: Feb 2010
Location: Prospect, CT
Posts: 165
Thanks: 0
Thanked 10 Times in 5 Posts
Default

Quote:
Originally Posted by F150HD View Post
are those 2 pics the same side of the inner primary? trying to identify what specifically is the seal in the pic that was put in backwards
Hey, sorry for the late reply. Those pics are taken from the drive pulley side of the inner primary chaincase. (the drive pulley is the toothed pulley that drives the rear wheel via the drive belt) So its on the outside of the chaincase ( not the side that comes in contact with the primary oil) on the back side of the primary chaincase. Did that help?
Reply With Quote
 
 
 
P
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Always check your connections.... RedHogz Evo Classic Models 4 11-20-2016 08:07 PM
sprocket shaft oil seal leak my dixie wreck Evo Classic Models 16 01-19-2013 01:37 PM
Writeup/ pictoral of primary & trans, seal replacements smokindave Touring Models 48 11-29-2011 11:55 AM
Inner primary seal and shifter shaft seals. Trippster Dyna Glide Models 4 06-08-2011 08:52 AM
05-06 Oil Consumption Fix? HDF Tech Engine Mechanical Topics 1 07-09-2006 10:12 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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

Forum Jump


All times are GMT -5. The time now is 09:48 AM.


 
  • Ask a Question
    Get answers from community experts
What's your question?
Send