Problems with attachments solved: viewtopic.php?f=7&t=17433

Clutch hub nut come loose.

Post Reply
1964 pan
Posts: 108
Joined: Sat Jun 30, 2007 12:11 pm
Bikes: 1964 FL
Location: WACO

Clutch hub nut come loose.

#1

Post by 1964 pan » Sat May 14, 2011 4:38 am

First time for every thing. I was about 15 miles from home. By the time I got home the only thing holding the basket on was the outer primary and derby cover. Reckon the Harley gods was looking down on me. The worst damage was chips knocked out around the key slot. It looks worse than it is. I think it is still runable.
Oh, crap. I forgot today is Friday the 13th. :twisted:
You do not have the required permissions to view the files attached to this post.
Last edited by 1964 pan on Sat May 14, 2011 5:13 am, edited 1 time in total.



katto
Posts: 62
Joined: Fri Aug 28, 2009 6:05 am
Bikes: 1948 panhead
Location: usa

Re: Clutch hub nut come loose.

#2

Post by katto » Sat May 14, 2011 5:10 am

Id run it. Just make shure to replace key & locking tab with new.

RUBONE
Moderator
Posts: 4890
Joined: Sat Nov 15, 2008 4:09 am
Bikes: Multiple H-D, Ducati, BMW, Triumph, BSA,...

Re: Clutch hub nut come loose.

#3

Post by RUBONE » Sat May 14, 2011 5:27 am

That shaft should be clean and bright with no sign of rust on it. And the same on the hub. No doubt what contributed to the hub coming loose. The taper and friction are what hold them together, not the key. If they don't have a good clean surface to bond, it will happen again! Lap them together lightly to clean them up before you assemble them. and make sure they are clean and dry, no oil residue on them!
Robbie

1964 pan
Posts: 108
Joined: Sat Jun 30, 2007 12:11 pm
Bikes: 1964 FL
Location: WACO

Re: Clutch hub nut come loose.

#4

Post by 1964 pan » Sat May 14, 2011 6:59 am

Thanks,Robbie. Will do. And a drop or two of locktite on the treads of shaft. There was no sign of the key left any where.

Bosheff
Posts: 1224
Joined: Fri Jul 03, 2009 8:23 pm
Bikes: 65 FLH 82 FLH
Location: Michigan

Re: Clutch hub nut come loose.

#5

Post by Bosheff » Sat May 14, 2011 9:16 am

Is there a chunk missing on the right side of the keyway, or is that just an illusion in the photo?....bosheff

Robert Luland
Posts: 893
Joined: Sun Sep 02, 2007 7:56 pm
Bikes: 1922JD, 1937 ULH, 1946FL 1948FL, 1957FL, 1960FLH, 1965XLCH, 1995 FLHT
Location: Hoboken, NJ
Contact:

Re: Clutch hub nut come loose.

#6

Post by Robert Luland » Sat May 14, 2011 11:47 am

The way I look at is the only reason that nut lock tab gave way, was something was moving. Check that clutch hub good, I’m willing to bet there is a ton of slap in the key way in it. I‘m sure that all that mess didn’t happen in just fifteen miles and the hub is egged out. Bob L

john HD
Moderator
Posts: 3669
Joined: Sat Aug 20, 2005 7:24 pm
Bikes: '42 WLA X 2, '55FL, '93 Ultra Classic, '91 Fatboy, '97 883, '71 Suzuki Duster 125, '83 GPz 750.

Re: Clutch hub nut come loose.

#7

Post by john HD » Sat May 14, 2011 11:52 am

that sucks, i'd clean the burrs off and lap the taper with valve grinding compound until everthing is nice and bright as robbie suggests.

clean it and assemble dry with a new key.

john

Bigincher
Posts: 2830
Joined: Tue Dec 18, 2007 2:10 pm
Bikes: 1941/59 EL
1952 FL
1977 FLH
1994 Fatboy

Re: Clutch hub nut come loose.

#8

Post by Bigincher » Sun May 15, 2011 3:46 pm

From the rust, I'd venture to say the hub has been loose on the shaft for awhile. I'm with Bob on this one...

Panhead Ed
Posts: 346
Joined: Sat Jan 30, 2010 8:29 pm
Bikes: 1948 FL
1959 FLH chopper
1966 Norton P-11
1968 XLCH
1976 FXE
Location: N/W ohio

Re: Clutch hub nut come loose.

#9

Post by Panhead Ed » Mon May 16, 2011 1:09 pm

Installing those hub locks can be tricky so pay close attention as they have atendency to twist at the last effort of tightening but have worked well for years if installed by a qualified mech. NO NEED FOR LOCKTIGHT.

Bosheff
Posts: 1224
Joined: Fri Jul 03, 2009 8:23 pm
Bikes: 65 FLH 82 FLH
Location: Michigan

Re: Clutch hub nut come loose.

#10

Post by Bosheff » Mon May 16, 2011 5:18 pm

When installing the lock tab and nut, lean the motorcycle as far over as possible to the kicker side. This will help in keeping the locktab in the clutch hub relief. Hand tighten the nut (left hand thread) until you are sure the tang is engaged, and there is no room for the locktab to slip out of the hub. Tighten to spec. Bend ear on tab....bosheff

1964 pan
Posts: 108
Joined: Sat Jun 30, 2007 12:11 pm
Bikes: 1964 FL
Location: WACO

Re: Clutch hub nut come loose.

#11

Post by 1964 pan » Sat May 21, 2011 6:23 am

All good advice,my friends. I have had my pan since 1974. But, it has been down for about 10 years. Just got it back together. Less than 100 miles on it. Short rides to break in easy and shake bugs out. I know exactly what happened. I did not get the hub tight enough for the tapers to lock into each other. The crud on the shaft did not help matters any.
I have lapped in, per Robbie's advice. Reassembled with new key. Really got hub tight on shaft. Eared lock washer in place. All tabs bent.
Back in the day I did this all the time as this was my only ride.
Just hope my left knee holds up. Already got replacement on right knee. Hell to get old. :(

reddog74usa
Posts: 25
Joined: Thu Oct 28, 2010 12:57 am
Bikes: 77FXE Super Glide
Location: Colorado

Re: Clutch hub nut come loose.

#12

Post by reddog74usa » Sat May 21, 2011 2:36 pm

As previously mentioned with all that rust it has been loose for quite some time. I would really look at the hub and first see if it's an aftermarket as some of those did not fit correctly and then check to see if the hub fits perfectly on the main shaft. I would check it without the key way then with. If the hub doesn't fit perfectly I would get another one. It could have also been caused by someone using the wrong size key way (to large) that interfered with the hub fitting the main shaft. The hub fitting the main shaft taper without any wobble is what you need to have. Also make sure the threaded portion of the main shaft doesn't come through the hub so far that the nut doesn't hold the hub securely to the shaft. Good luck, RD

Cotten
Posts: 6911
Joined: Mon Aug 26, 2002 9:09 am
Location: Central Illinois

Re: Clutch hub nut come loose.

#13

Post by Cotten » Sat May 21, 2011 3:19 pm

RD!

Lapping, as previously suggested, is the best way to inspect both tapers. The areas of contact and interference are quickly visible.

Often forces upon the key can cause a bulge along an unbroken keyway, which can be lightly stoned and then lapped to perfection.
A dressed original hub or shaft is still superior to most modern replacements.

....Cotten

reddog74usa
Posts: 25
Joined: Thu Oct 28, 2010 12:57 am
Bikes: 77FXE Super Glide
Location: Colorado

Re: Clutch hub nut come loose.

#14

Post by reddog74usa » Sat May 21, 2011 5:42 pm

Cotten you are correct. I didn't see that in the previous post, should have read it a bit better ahy.

Post Reply

Return to “Clutch”