Question: how to remove slx cranks?
Answer: Unlock Left-hand Crank. Undo the pinch bolts clamping the left-hand Shimano Hollowtech crank to the axle.
Undo Pre-load Cap. Undo and remove the plastic pre-load cap. ... 
Lift The Safety Tab. Use a small screw driver to lift the plastic safety tab.
Pull Off The Left-hand Crank. ... 
Tap Out The Axle.