Servicing an XTR M900 rear hub
- Thread starter julesg007
- Start date
drive side, the freehub comes off with a ten mil allen key;
http://www.parktool.com/blog/repair-hel ... ce#shimano
non drive, there is not a lot of point taking the bearing shield off, just wipe the surfaces out, lots of clean rags and WD40 or similar. cross your fingers the surfaces are not pitted.
park tools also suggest its good to leave the dust caps in place, as they can be fragile
http://www.parktool.com/blog/repair-hel ... adjustment
new cones and balls will make it run sweet again...
http://www.parktool.com/blog/repair-hel ... ce#shimano
non drive, there is not a lot of point taking the bearing shield off, just wipe the surfaces out, lots of clean rags and WD40 or similar. cross your fingers the surfaces are not pitted.
park tools also suggest its good to leave the dust caps in place, as they can be fragile
http://www.parktool.com/blog/repair-hel ... adjustment
new cones and balls will make it run sweet again...
Hi,
Thanks for the replies.
Glad to see that I don't need specialist tools to remove the free hub - removed them before so I'll dig out the 10mm allen key again.
Can see I don't need to remove the bearing covers but was seeing if they were easy to remove to ensure a thorough clean, so if I really did want to remove them, how do I go about?
Axle is fine and the hub bearing surfaces, cones and bearing are all OK with no pitting so a good clean and regrease and the hubs (got the front as well) will be running nice and smooth.
Thanks for the replies.
Glad to see that I don't need specialist tools to remove the free hub - removed them before so I'll dig out the 10mm allen key again.
Can see I don't need to remove the bearing covers but was seeing if they were easy to remove to ensure a thorough clean, so if I really did want to remove them, how do I go about?
Axle is fine and the hub bearing surfaces, cones and bearing are all OK with no pitting so a good clean and regrease and the hubs (got the front as well) will be running nice and smooth.
minor_LEGEND
Senior Retro Guru
They should all lever out with a large flat blade screw driver (being very carefull obv). I would warm them a tad with a hair dryer just to avoid any cracking due to the age of the plastic.
Worthy of note is that the ball bearings are hardened on XT & XTR components, so if you do replace them (I would myself) then be sure not to just buy generic cheap balls. Likewise insist on XT/XTR genuine cones if you ever replace.
Worthy of note is that the ball bearings are hardened on XT & XTR components, so if you do replace them (I would myself) then be sure not to just buy generic cheap balls. Likewise insist on XT/XTR genuine cones if you ever replace.
Thanks again for the further replies.
I can see the four holes in the plastic cover and the word "tighten" so I assumed it would unscrew.
I have looked agaon at the drive side and I can also see four holes in that and as the inside of the free hub is threaded I was wondering if that is screwed into place.
Agree that on the cheaper hubs this cover is a friction fit and generally once removed (gently persauded out with a lever) they can become a bit loose.
I have double checked the wearing surfaces and ball bearings and they are all in very good order so I won't need to be changing them. A good clean and re-grease and correct setting of the cones should see the hubs ready for action and more years of service ahead of them.
I can see the four holes in the plastic cover and the word "tighten" so I assumed it would unscrew.
I have looked agaon at the drive side and I can also see four holes in that and as the inside of the free hub is threaded I was wondering if that is screwed into place.
Agree that on the cheaper hubs this cover is a friction fit and generally once removed (gently persauded out with a lever) they can become a bit loose.
I have double checked the wearing surfaces and ball bearings and they are all in very good order so I won't need to be changing them. A good clean and re-grease and correct setting of the cones should see the hubs ready for action and more years of service ahead of them.
