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Author Topic: Final drive oil seal replacement  (Read 2227 times)

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Offline tlbranth

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Final drive oil seal replacement
« on: November 15, 2013, 05:32:31 PM »
Looks like it's going to be a bit of a challenge. I've searched for how-to's and only found a few tid-bits. Soooooooo, if anyone has done this (engine on bike) with enormous success, care to share your method? It looks like removal and install might both prove to be exciting. Any help appreciated.
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Offline tlbranth

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Re: Final drive oil seal replacement
« Reply #1 on: November 16, 2013, 09:37:09 AM »
Well OK then. If I come up with any good ideas I'll post them.
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Offline Johnie

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Re: Final drive oil seal replacement
« Reply #2 on: November 16, 2013, 10:57:46 AM »
I think it was andy750 who had a post about doing that. You may want to check with him...
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Offline tlbranth

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Re: Final drive oil seal replacement
« Reply #3 on: November 16, 2013, 03:54:50 PM »
Well here's how I did it. I bent a small hook in a stiff piece of wire, stuffed it through the inside of the seal, twisted the hook outward and gave it a tug. I figured I'd need 2 or 3 of them but one did it.
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Offline tlbranth

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Re: Final drive oil seal replacement
« Reply #4 on: November 16, 2013, 03:56:13 PM »
Here's the pull
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Offline Vinhead1957

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Re: Final drive oil seal replacement
« Reply #5 on: November 16, 2013, 05:20:56 PM »
Can you feel any side wards play in the shaft? A seal may symptom of bearing play.
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Offline Duanob

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Re: Final drive oil seal replacement
« Reply #6 on: November 16, 2013, 05:40:07 PM »
Hey Terry, how did it go? I usually drill a couple of 2" drywall screws one 180 degrees from the other and then pry it out.
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Offline CoachDoc

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Re: Final drive oil seal replacement
« Reply #7 on: November 16, 2013, 06:27:09 PM »
Nice method. I'll be doing this soon. This looks like a nice alternative to inserting a screw to pull the seal. Thanks for posting.
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Offline tlbranth

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Re: Final drive oil seal replacement
« Reply #8 on: November 17, 2013, 09:12:12 AM »
Quote from: Vinhead1957 on November 16, 2013, 05:20:56 PM
Can you feel any side wards play in the shaft? A seal may symptom of bearing play.
No side play. The seal was 43 years old so it deserved a rest.
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Offline tlbranth

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Re: Final drive oil seal replacement
« Reply #9 on: November 17, 2013, 09:17:24 AM »
Here's how I put in the new seal. I used a large socket and pried it in against the case using a herking steel bar. It worked OK but I muffed the seal placement on the shaft. The seal lips were bent outwards. I pushed them back in with a small screwdriver but I'm betting the spring came off. Can't risk it so I'm going to buy a couple more and redo. For the next install, I think I'm going to make a tool. I have an idea for one and I'll post if it works. Meanwhile, here's how I did this one:
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Offline tlbranth

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Re: Final drive oil seal replacement
« Reply #10 on: November 17, 2013, 05:32:15 PM »
Well I ordered a new seal and meanwhile built this installation tool. Don't know how well it'll work but it should.
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Offline tlbranth

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Re: Final drive oil seal replacement
« Reply #11 on: November 17, 2013, 05:33:39 PM »
Here's how it looks in (fake) use
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Offline flybox1

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Re: Final drive oil seal replacement
« Reply #12 on: November 17, 2013, 09:41:29 PM »
Nice work, Terry.  Is the 'Herken' tool patented, yet?  ;D
Glad I was able to do thos seal with split cases....whatta chore.  :o
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