Old 05-21-20, 06:40 PM
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WGB 
WGB
 
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Shimano MF-HG20 Freewheel won't freewheel

This is on a 1988 Schwinn Traveler
Original rims were 27 inch but dust cap on rear hub had a dent that hits wheel bearings. No access to a replacement dust cap until Covid ends so switched to a 700c wheelset.




Freewheel is a Shimano MF-HG20 6 speed

Front of freewheel (Please excuse the dirt, its been cleaned since that photo)



Rear of freewheel



Freewheel installs properly on hub, no binding

Complete wheel turns smoothly in hands and relatively true

Installed on bike and zero adjustments to derailleurs required. Shifted flawlessly.

But, if you stop pedalling the cranks keep spinning. Cannot back pedal.

Remove wheel from bike and remove freewheel. Freewheel cogs do not spin on freewheel hub.

1) assuming no wheel hub issues. If I'm wrong please advise.
2) assuming issues within hub (no grease or pawls sticking due to having sat for a while???)

I have turned the freewheel upside down and oiled rear along edge where freewheel hub meets cogs. Next step plan to flip freewheel and oil along edge of freewheel hub (above "Shimano SIS lettering and below MF-HG20 Singapore lettering in photo) then let sit all night and remount tomorrow morning and see if cured.

3) Is this a bad idea??

If that doesn't work, should I try and tap the lockring - clockwise - and slightly loosen it but no completely to see if that will allow in oil (or even PB Blaster)???

Should I simply moved to PB blaster and/or WD-40 straight off???
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