Shimano rear hub - freewheel fowards ??

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tb
Posts: 126
Joined: 10 Jan 2007, 12:51pm

Shimano rear hub - freewheel fowards ??

Postby tb » 22 Oct 2013, 9:34pm

Hi There

Am I asking alot of an old Shimano Uniglide freewheel ?

On my way home from work in Wembley with about 20 miles still to go the hub started ' freewheeling ' in both pedal rotations, backwards ( as you'd expect ) but also foward ?
In the dark I thought it was a chain problem, but no the hub was freewheeling in both directions.

Some months back I had noticed some ' cracking ' noise from the hub so I repalced the wheel bearings and greased up properly.

I managed to limp home on the night with very slow pedal movements and got home very late.

Question is ;

Is the hub knackered / is it worth repairing ?

thanks for any help,

Anthony

Brucey
Posts: 37285
Joined: 4 Jan 2012, 6:25pm

Re: Shimano rear hub - freewheel fowards

Postby Brucey » 22 Oct 2013, 9:44pm

nine times out of ten this is water in the freewheel (or dried grease), causing the pawls to stick.

If you purge the freewheel body with WD40, then oil, it will usually spring back to life.

If it is a screw on freewheel then replacement is usually easiest at this stage, but you can overhaul the freewheel body if you want to.

If this doesn't work and it is a bolt-secured freehub (rather than a screw on freewheel), the body can be replaced (if you can get the right one). The freehub body can be overhauled in situ if required; if the body is riveted to the hubshell (as early uniglide) then the latter is your only choice, barring a new hub.

cheers
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~~~~~~~~~~~~~~~~~~~~~~Brucey~~~~~~~~~~~~~~~~~~~~~~~~

reohn2
Posts: 37779
Joined: 26 Jun 2009, 8:21pm

Re: Shimano rear hub - freewheel fowards

Postby reohn2 » 22 Oct 2013, 9:55pm

Brucey wrote:nine times out of ten this is water in the freewheel (or dried grease), causing the pawls to stick.

If you purge the freewheel body with WD40, then oil, it will usually spring back to life.
cheers


Spot on!
I always remove the freehub body when servicing the hub,remove the rubber dust seal at the rear of the f/hub(spoke side) and flood it with TF2 until it's coming out the the bearing end.You can usually tell by the sound of it freewheeling(before assembly) as it sounds "sweeter"
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I cycle therefore I am.

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NATURAL ANKLING
Posts: 11385
Joined: 24 Oct 2012, 10:43pm
Location: English Riviera

Re: Shimano rear hub - freewheel fowards

Postby NATURAL ANKLING » 22 Oct 2013, 10:39pm

Hi,
Brucey wrote:If this doesn't work and it is a bolt-secured freehub (rather than a screw on freewheel), the body can be replaced (if you can get the right one). The freehub body can be overhauled in situ if required; if the body is riveted to the hubshell (as early uniglide) then the latter is your only choice, barring a new hub.
cheers

Are you talking early freehub minus the hollow bolt :?:
NA Thinks Just End 2 End Return + Bivvy
You'll Still Find Me At The Top Of A Hill
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