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My daughter has a Spec Tricross which is 9sp rear cassette. The rear hub is cup and cone. The ratchet in the freehub has become sticky which is causing problems.
Having taken the axle out and removed the cones and ball bearings, there is a push-in seal on the drive side, which seals withthe seal around the DS cone.
The cup on the drive side has 2 small cutouts, 180 degrees from each other, that seem to take a tool like a freewheel remover, to allow access to the ratchet of the freehub.
A look for freehub removal tools seems to throw up a myriad of options. Does anyone have any idea which one i want? The websites dont seem to list sizes of peg or cutout, so im a bit lost unless there is an industry standard for this stuff.
thanks
Ian
10mm allen key
As above, you need a 10mm allen key to remove the freehub. Thos is on a right hand thread, IIRC.
The piece with the two notches at 180 degrees is what holds the free hub together. It's on a left-hand thread, if you undo it you'll end up with pawls and tiny ball bearings everywhere. You can often service these freehubs this way. Fresh ball bearings and grease and it'll be good for many more miles as long as the pawls and ratchet ring are in good condition.
part number 9 in this diagram unscrews with 10mm allen key
https://www.bikeparts.co.uk/products/shimano-fh-rm66-complete-freewheel-body?variant=12705681047641&utm_medium=cpc&utm_source=google&utm_campaign=Google%20Shopping&gclid=EAIaIQobChMI-aXMq5XE7QIVlrrVCh1G6gNvEAEYASAAEgIxy_D_BwE
the problem is getting the right replacement freehub
10mm allen key
Or an 11 or a 12 🙂
Depends on the freehub
I presume it is what this guy is doing
.
Before you take it apart it may be a good idea to try to flush it and re-lube it without taking it apart. If you have removed the rubber seal at the back and the ball bearings from the other side you could squirt some GT85 or WD40 - around the edge of the cut-outs and at the back where you removed the rubber seal. If you can get it to spin freely, then you just need to let it rest overnight for the solvent in the GT85 to evaporate leaving a thin oil residue. Ideally you should then dribble some gear oil (EP90 - car gearbox oil is the preferred option). Failing that you could use some wet chain oil - but be warned some types will clog up in time.
Depending on the exact hub fitted it might be a 11mm or 12mm hex key.
What model and year is the tri cross
Or your local Spesh dealer can look up some parts by frame number but the system does have gaps
All, thank you for this. I really wasnt sure before your input.
I will start with the gt85 method before i get too invasive.
Many thanks
Ian
Presumably a Shimano free hub; take it off with a 10mm allen key then I used to take the seal off the back of the freehub, squirt it through with WD40, then with 3-in-1 oil, then with thicker engine oil.