Inner primary mainshaft oil seal won't stay in! - 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:

Inner primary mainshaft oil seal won't stay in!


Old 10-29-2008, 10:19 PM
Z's Avatar
Z is offline
Road Master
Thread Starter
Join Date: Nov 2005
Location: Mountain View, California
Posts: 989
Thanked 7 Times in 7 Posts
Default Inner primary mainshaft oil seal won't stay in!

98 Dyna Wide Glide

I've never seen this before. When I press the oil seal into the back-side of the inner primary cover and then remove the press, the seal begins to sort of... ooze... out of the case! Within a few minutes the seal will pop out all the way.

I've installed the seal with the side labeled "Oil Side" facing into the area where the primary chaincase lubricant will reside. I've compared this seal to the original and it seems to be the same dimensions.

Since the back of this seal floats in air (i.e., doesn't abutt another part), this obviously concerns me.

Any thoughts on why this is happening and how to correct it?

Reply With Quote
Old 10-29-2008, 10:34 PM
Rider57's Avatar
Rider57 is offline
Road Captain
Join Date: Feb 2008
Location: Colorado
Posts: 571
Thanks: 0
Thanked 0 Times in 0 Posts

How long have you owned this bike? I think the case is warped from being over-torqued.
Reply With Quote
Old 10-30-2008, 11:22 AM
robzuc97 is offline
Road Master
Join Date: Nov 2007
Location: Peoria, AZ
Posts: 1,223
Thanks: 0
Thanked 0 Times in 0 Posts
Angry Seal popping out

Too bad the manual isn't too specific on this one, eh? And it doesn't mention direction but the "oil side" facing toward the primary oil sounds reasonable as long as seal sits flush with case before it "oozes" out. And I looked in a softail & dyna book for a good picture! Seems like I remember a spring facing toward the fluid cuz I knocked mine off my '97 FLSTC (similar case design) once putting case back on shaft; does yours have? That side goes to fluid. My only suggestion is to NOT put Hylomar or any other sealant on the seal (not needed). Since it is a press fit and held in by friction, it may be "lubing" it and allowing it to pop out once in from the side pressure.
Reply With Quote
Related Topics
Thread Starter
Last Post
Touring Models
03-26-2013 03:12 PM
10-30-2008 06:16 PM
10-28-2008 11:32 AM
Motorcycle Parts For Sale-Misc. Parts
08-08-2008 02:25 PM

Thread Tools
Search this Thread
Quick Reply: Inner primary mainshaft oil seal won't stay in!

Featured Sponsors
Vendor Directory

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to and affiliated sites.
  • Ask a Question
    Get answers from community experts
Question Title:
Your question will be posted in: