Cranks not loose enough

[stewie911]

I installed new slx cranks with hollowtech II bb, but the cranks are very stiff (Doesn?t turn easily)

 

I have already loosened the cap that screws on the non-drive side. It helped a bit, but still not enough.

 

The bb cups are fastened with quite some force against the spacers.

 

Any tips?

 

 

[philip.maree]

Although you shouldn't fasten the cups against the spacers with force, that shouldn't be your problem.

 

The cranks should spin effortlessly without the chain on. If it doesn't then there might be issues with the bearings.

 

[AndreZA]

Although you shouldn't fasten the cups against the spacers with force' date=' that shouldn't be your problem.

 

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50nm of torque a quite a bit of force. But you are right, it should not make a difference.

 

 

 

How difficult was it to insert the crank axle? Is it the first time this frame is being fitted with a crank? Has the BB shell been faced? Are the cups in 100 square (screwing them in skew can happen). The end "tension" bolt should only be lightly tightened by hand (0.5-0.7nm).

 

 

 

Take it all apart and start again.

 

 

 

 

[Domin8tr]

The Park Tool Blue Book says the crank cap only need push the crank very lightly against the bearing. They recommend 4 inch pounds of torque. Otherwise you cause the bearing to drag and wear by pulling it out of alignment. You should check the Park Tool website. They have instructional video's of all bike repairs. Youtube asswell

[stewie911]

I did have to apply a lot of pressure to get the axle into the bb.

 

Will redo everything today.

 

[Wyatt Earp]

Make sure you used the correct amount of spacers on the BB cups.

[stewie911]

I first installed the bb without spacers and saw a gap for 2 spacers on drive side and 1 on non drive side. So, that's how I installed it.