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Homeade Sprung hub dismantling jig #495208
06/23/13 9:39 pm
06/23/13 9:39 pm
Joined: Jun 2013
Posts: 152
UK
C
Cloggy Offline OP
BritBike Forum member
Cloggy  Offline OP
BritBike Forum member
C
Joined: Jun 2013
Posts: 152
UK
Having read a few posts on forums regarding the dangers of dismantling the sprung hub, and bearing in mind the warning cast on the casing, I made this jig based on plans contained in a Triumph maintenance booklet I found on a forum. Fabricated from bits and pieces I had lying about..including an old bed frame..... Worked a treat and allowed the sprung hub to be safely dismantled and reassembled.

If anyone else has managed to dismantle one of these I would be interested in how you went about making replacements for the rubber buffers.









1951 Triumph 6T Thunderbird;1939 Ariel VH Redhunter;1970 B175 Bantam;1986 Yamaha SRX600 single
http://cloggymoore.wix.com/triumph-pre-unit-6t
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Re: Homeade Sprung hub dismantling jig [Re: Cloggy] #495223
06/24/13 12:28 am
06/24/13 12:28 am
Joined: Aug 2001
Posts: 6,748
Vermont
Jon W. Whitley Online content

BritBike Forum member
Jon W. Whitley  Online Content

BritBike Forum member
Joined: Aug 2001
Posts: 6,748
Vermont
That's pretty cool. Those springs look very strong and ready for another 60 years of service if the pics are anything to go by.


Jon W.


1957 6T Thunderbird 650
1968 T100R Daytona 500
1971 TR6R Tiger 650
1970 BSA A65F 650
1955 Tiger 100 - Project

Re: Homeade Sprung hub dismantling jig [Re: Jon W. Whitley] #495258
06/24/13 10:07 am
06/24/13 10:07 am
Joined: Jun 2013
Posts: 152
UK
C
Cloggy Offline OP
BritBike Forum member
Cloggy  Offline OP
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C
Joined: Jun 2013
Posts: 152
UK
Everything was in good shape with very little wear on the sliding parts. I cleaned it all up for the pics but it was full of graphite grease. Only issue was the rubber buffer located at each end of the sliding block, these cusion contact between the block and the end plates on full compression, these had deteriorated because of the grease swelling and becoming soft. I am going to ry and make some more out of oil resistant rubber sheet.


1951 Triumph 6T Thunderbird;1939 Ariel VH Redhunter;1970 B175 Bantam;1986 Yamaha SRX600 single
http://cloggymoore.wix.com/triumph-pre-unit-6t
Re: Homeade Sprung hub dismantling jig [Re: Cloggy] #495263
06/24/13 11:20 am
06/24/13 11:20 am
Joined: Dec 2004
Posts: 9,082
Scotland
kommando Online content
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kommando  Online Content
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Joined: Dec 2004
Posts: 9,082
Scotland
You could go to rubber grease which is based on silicone, I use it on Commando isolastics and the rubber is protected and so are the metal parts.

Re: Homeade Sprung hub dismantling jig [Re: Cloggy] #495270
06/24/13 12:14 pm
06/24/13 12:14 pm
Joined: Nov 2010
Posts: 2,851
Arlington, Massachusetts, USA
kurt fischer Online content
#irideslow
kurt fischer  Online Content
#irideslow
Joined: Nov 2010
Posts: 2,851
Arlington, Massachusetts, USA
Nice.

That looks like the jig drawing in Fig. 48, p. 100 of "Triumph Twin Motor Cycles, A Practical Guide Covering All Models from 1938," by A. St. James Masters (1957), a nice book if you can find one.


Kurt
1968-70-71 Triumph TR6R Bitsa - 1969 Triumph TR6R - 1971 BSA A65L - 1973 Triumph TR5T
2005 Ducati MTS 1000S DS - 2012 Ducati Hyper 796 - 2014 Kawasaki ZX1000
Re: Homeade Sprung hub dismantling jig [Re: kommando] #495285
06/24/13 3:01 pm
06/24/13 3:01 pm
Joined: Jun 2013
Posts: 152
UK
C
Cloggy Offline OP
BritBike Forum member
Cloggy  Offline OP
BritBike Forum member
C
Joined: Jun 2013
Posts: 152
UK
The grease is to lubricate the sliding part of the hub where it bears on the alluminium case so it needs to contain something like graphite or molybedium which provides low friction for slow moving parts. I don't know whether you can get a silicone based grease with such aditives.


1951 Triumph 6T Thunderbird;1939 Ariel VH Redhunter;1970 B175 Bantam;1986 Yamaha SRX600 single
http://cloggymoore.wix.com/triumph-pre-unit-6t
Re: Homeade Sprung hub dismantling jig [Re: Cloggy] #495309
06/24/13 6:35 pm
06/24/13 6:35 pm
Joined: Jun 2007
Posts: 5,558
Maui Hawaii
HawaiianTiger Online content

BritBike Forum member
HawaiianTiger  Online Content

BritBike Forum member
Joined: Jun 2007
Posts: 5,558
Maui Hawaii
I've ridden a couple of bikes with sprung hubs and also watched them from behind going down the road. I can't imagine that any of you would throw a leg of a sprung hub bike if you's seen what I've seen. Talk about a hula dance....

Anyway, strong work and kudos for doing the dangerous deed.

I'd rather risk my kidneys on a rigid bike with sprung seat than ride one of those things.

Besides, the main idea of this contraption was to get rid of the sprung seat in favor of a dual seat so you could ride with someone on the back in more comfort. From my experience you do need two people on the bike before the thing actually starts to move, at least in the vertical direction.

Good luck.
Bill


Bikes
1974 Commando
1985 Honda Nighthawk 650
1957 Thunderbird/T110 "Flying Tiger"
Antique Fans: Loads of Emersons (Two six wingers) plus gyros and orbiters.
Re: Homeade Sprung hub dismantling jig [Re: Cloggy] #495316
06/24/13 7:26 pm
06/24/13 7:26 pm
Joined: Aug 2001
Posts: 7,032
scotland
triton thrasher Online content
BritBike Forum member
triton thrasher  Online Content
BritBike Forum member
Joined: Aug 2001
Posts: 7,032
scotland
Where would you put the sliding parts so that the minimum amount of clearance is magnified into the maximum rear wheel misalignment?

Right there!


Amateur Loctite enthusiast.

Moderated by  John Healy 


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