Shimano XT rear derailleur servicing

[Kins]

Got an XT long cage 9 speed derailleur but the jockey wheels were very lose. Looks like the fibre washers are knackered which means top jockey wheel is touching the side of the cage.

Know how where you get replacements? Also one ceramic jockey wheel and one normal, is this normal?

 

[RecordAceFromNew]

Got an XT long cage 9 speed derailleur but the jockey wheels were very lose. Looks like the fibre washers are knackered which means top jockey wheel is touching the side of the cage.

Know how where you get replacements? Also one ceramic jockey wheel and one normal, is this normal?

I think this is what you are looking for if you want to stick with oem parts. If you look at the pic below the one on the right is the guide (i.e. top) pulley with ceramic bushing, while the one on the left is the tension (i.e. bottom) pulley.

I might think twice before paying over 20 notes for pulleys when new mechs are under £50.

 

[accountantpete]

You may be able to get away with any Shimano Jockey wheel - I have used 9spd road on an XTR and it worked ok. Not perfect but good enough.

I think the main difference is the width of the bodies and the resultant float - so as long as you have the same number of teeth then you are going to get a reasonable performance.

 

[Kins]

Jockey wheels are fine Pete, its the fiber or pressed nylon washers that are buggered. If you look at the wheels in the above post, they go on the outside on the two metal jockey wheel inserts. I would take a picture but I threw them away, well what was left of them.

 

[accountantpete]

Jockey wheels are fine Pete, its the fiber or pressed nylon washers that are buggered. If you look at the wheels in the above post, they go on the outside on the two metal jockey wheel inserts. I would take a picture but I threw them away, well what was left of them.

To the best of my knowledge Shimano JW's have a metal central core. If you have fibre washers on the outside that would indicate that the JW's are Tacx - if so you have to buy the complete set (jockey wheels and bushings).

 

[RecordAceFromNew]

To the best of my knowledge Shimano JW's have a metal central core. If you have fibre washers on the outside that would indicate that the JW's are Tacx - if so you have to buy the complete set (jockey wheels and bushings).

Perhaps the OP is talking about the plastic rings between the metal outer caps and the bushing core in 10 here. Anyhow since the whole assembly is identified by one code, I would be surprised if individual components within the assembly are available from Shimano in this case.

 

[Kins]

Right if you look at 9 and 10 on that diagram, you have the metal insert (10) into the jockey wheel pictured, but if you look back at 9 you can see the washer attached to the cage. I can probably make some but if they were/are available I would buy em.

 

[lpretro1]

TACX jws are way less expensive & good value

 

[accountantpete]

Right if you look at 9 and 10 on that diagram, you have the metal insert (10) into the jockey wheel pictured, but if you look back at 9 you can see the washer attached to the cage. I can probably make some but if they were/are available I would buy em.

I think that the "washer" attached to the cage is a raised part of the metal to stop the JW rubbing against the cage.

Check the inside of the cage - there should be a raised dome around each hole..

The Shimano JW's have a central hollow tube which is fractionally wider than the jockey wheel itself. This metal tube contacts the domed part of the metal cage and working together allow the wheel to move across the gap (called "float" which aids shifting) and stops the wheel catching the cage.