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12 speed xt shifter, wouldn't get gears, fixed with a clean..
But is that likely to be a permanent fix?
Bought a second hand bike with xt gears. Great I thought.
The mech lost tension, less great. Cured with a load of wd40 and working it back and forwards. Fine
Today the shifter would only get 4 then 6 then 7 then 4 gears. Even less great.
Couldn't find any shops open today to buy a replacement closure than an hour's drive, so took the shifter to bits and cleaned it up.
It now gets all the gears.Â
Is this likely to be a permanent fix?
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While fixing this the rear mech lost tension again so I've fitted the deore mech I bought when the xt one. Making me wonder if I should buy a new shifter to go with the new rear mechÂ
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Looks like the bike was more used than I thought 🙂
WD40 isn’t a lube. It will shift some grime but leave everything dry.
Use some proper grease on the internals and spray lube on the cable inners.
You probably needed to pull apart the clutch mechanism and de-gunk/regrease the axle directly behind it. But I've always found the writing was on the wall for the mech at that point, although you might get a few more months out of it. Likewise the shifter once it starts misbehaving.
Which bits of the shifter need greasing?
Everything that moves?
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The mech will get cleaned and rebuilt and used as a spare.Â
If your mech lost tension, I'd suggest the roller bearing is borked.
A clutch service won't fix that, you'll need to replace the bearing.
Which part is the roller bearing?
I'm talking about the p-axle (10), I found that tends to get gunked up or even corroded on these mechs and reduce return speed enough to produce a slack chain. Obviously you need to take apart the clutch assembly to get at it.
That exploded diagram will be very helpful if/ when the rebuild explodes into 50 tiny pieces 😱
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You can see it inside the circular stabilizer unit.Â
My experience was the bearings rusted and seized to the p-axle.
I replaced one from a broken saint mech. The other shimano sent me the parts.