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Chasing leaks and mystery bolt/nut

Started by flhs90, August 20, 2022, 07:24:43 AM

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flhs90

Can anyone help me identify this mystery? While chasing down my shovel leaks got confused. This part is under frame and hard to see. The nut or bolt spins freely in both directions but does not come off. I can see threads above but they appear fixed and not turning.
At first thought it was an extra trans case drain.
1980 FLH80, 1990 FLHS, 2006 FLSTS<br />Western Oregon

xlfan

5-speed rubber mount FLH?

It could be the remains of the stock oil filter mount under the transmission. Where is your oil filter located now?

flhs90

August 20, 2022, 07:47:28 AM #2 Last Edit: August 20, 2022, 08:02:14 AM by Coyote
Can not load will try later.

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1980 FLH80, 1990 FLHS, 2006 FLSTS<br />Western Oregon

flhs90

August 20, 2022, 07:50:08 AM #3 Last Edit: August 20, 2022, 07:59:02 AM by flhs90
OK thanks Xlfan, took photo again.
Any ideas will help. I was able to r and r the gear case and oil pump gaskets now over to inner primary and under tranny finding possible leaks.

The big 7/8 nut . 1980 FLH 4 speed. Oil filter is in oil tank under seat.
1980 FLH80, 1990 FLHS, 2006 FLSTS<br />Western Oregon

bump

That big nut looks to be below trans mount on frame. You should have 4 studs and one bolt that mount transmission. have you pulled whole trans out yet.

flhs90

At this time not pulling trans out. Shovel running too good for now.
Just trying to go for leak free as possible. The big nut with hole in center just spins either way, it has a lock washer above. Will get some better photos up after raising bike as high up as possible with blocking and scissorjack. I can see threads above but they are fixed and do not turn just the 7/8 nut.
1980 FLH80, 1990 FLHS, 2006 FLSTS<br />Western Oregon

kd

Quote from: flhs90 on August 20, 2022, 12:29:01 PMAt this time not pulling trans out. Shovel running too good for now.
Just trying to go for leak free as possible. The big nut with hole in center just spins either way, it has a lock washer above. Will get some better photos up after raising bike as high up as possible with blocking and scissorjack. I can see threads above but they are fixed and do not turn just the 7/8 nut.

Did you think to search it out in Ronnie's parts finder?

 https://www.shopronniesharleydavidson.com/index.asp
KD

flhs90

August 20, 2022, 06:00:01 PM #7 Last Edit: April 23, 2023, 01:05:40 AM by FSG
OK after looking at a flh frame on the bay, my parts book on the frame and trans mounting plate.
I was wrong about threads above the nut. Got frame up a little higher.
Can clearly see bolt flats above the spinning 7/8 nut. No threads above.
Pretty sure it is attached to the 5th mounting bolt to trans.
Better angle flats clearly visible.
Thanks all.
Only ? now is why the free spinning large nut below.

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1980 FLH80, 1990 FLHS, 2006 FLSTS<br />Western Oregon

RTMike

That is the left front mounting bolt that is bolted threw the mounting plate to the frame with a carriage bolt.It looks like someone has stuck a large diameter not to the bottom threads of the mounting bolt.just cut it or pull it off it is not functional.This won't be your oil leek either.

flhs90

August 21, 2022, 10:53:34 AM #9 Last Edit: August 21, 2022, 05:27:04 PM by flhs90
Quote from: RTMike on August 21, 2022, 08:48:14 AMThat is the left front mounting bolt that is bolted threw the mounting plate to the frame with a carriage bolt.It looks like someone has stuck a large diameter not to the bottom threads of the mounting bolt.just cut it or pull it off it is not functional.This won't be your oil leek either.


We have a winner. RT Mike. Thank you that explains it. Now, it is on to the primary or mainshaft bushing or seals.
Probably going to wait a while and just ride it.
Winter comes soon enough.

HD part 47730-77 it was in the book. The large  nut on the threaded stud confused me 4 sure.
1980 FLH80, 1990 FLHS, 2006 FLSTS<br />Western Oregon