Crank Removal and Installation - Two Piece Compression Slotted (Hollowtech II, FSA)
Why Bicycles Stack Exchange recommends it
Bicycles Stack Exchange answerers point people to it when a Hollowtech-style crank has play or loose pinch bolts, since it shows the correct preload and torque procedure.
Recommended by 3 people across 4 different months, 2018 to 2024.
What it is
A Park Tool shop-style tutorial showing how to remove and install two-piece compression slotted cranks such as Shimano Hollowtech II and FSA Gravity. It lists the tools needed, then walks through removal, installation, preload adjustment and pinch bolt tightening in about six and a half minutes.
What people said
Recommends Andrew Henle · 2018-08 · Bicycles Stack Exchange · on “How to tighten the Hollowtech II (on R2000 Claris) cranks?”
Park Tool's website has quite a few "fix your bike" tutorial videos. You may have already seen this one: Crank Removal and Installation - Two Piece Compression Slotted (Hollowtech II, FSA) [this video] I do wonder how many bike shop mechanics go to Park Tool's website and watch the videos for tips on how to work on obscure parts. In this case, "how to tighten the crankset" is a necessary part of installing such a crankset. For this video, that starts about the 4-minute mark. In this case, all you probably need to do is get the proper Allen wrench and make sure the two clamp bolts are tight. (And that doesn't mean King Kong tight...) There's nothing special about doing your own bicycle maintenance
Recommends Andrew Henle · 2019-08 · Bicycles Stack Exchange · on “Broken bottom bracket?”
That's a Shimano Hollowtech II crankset and bottom bracket. Your bottom bracket isn't causing that problem - that's something seriously wrong with your crankset. The only thing I can conceive of causing that problem is the two pinch bolts on the non-drive side are loose. (your first photograph - the side without the chainrings) There are two bolts that hold the non-drive side crank arm in place. They need to be tight. See this Park Tool video: I also suspect your crankset may be damaged to the point it needs to be replaced. The splines that hold the crank arm aligned are almost certainly badly distorted.
Recommends Argenti Apparatus · 2020-01 · Bicycles Stack Exchange · on “Why does this hollowtech crankset have play?”
In Shimano cranks the plastic bolt is hand tightened prior to tightening the pinch bolts to 'preload' the bearings and take up play. When the plastic bolt is tightened the crank arms press on the inner bearing races only which is what takes up the play. If you remove the left crank arm and take away the preload you will feel a some play in the bearings. I'd say try installing the left hand crank arm and adjusting the play take up properly with the plastic bolt. Also make sure you are doing the crank pinch bolts up to the correct torque so the crank arm is not working loose on the axle. As usual Park Tool has a great video that shows how to do this.
Recommends Vladimir F Героям слава · 2022-01 · Bicycles Stack Exchange · on “Chain damaged carbon frame. How to remedy?”
I would also recommend a torque wrench so that the pinch bolts are torqued both properly and equally. Here is the procedure in great detail [this video] IMHO, anyone who owns a carbon frame should own a torque wrench. Even for stuff like the stem or seatpost on an aluminium bike it is preferred. Canyon ships a simple one with their bikes.
Cites Criggie · 2024-04 · Bicycles Stack Exchange · on “Hollowtech BB, horizontal play”
[this video] suggests the preload is too loose. I'll be checking that out tomorrow and will update. Also going to try making a shim and see how it works between NDS crankarm and BB, and separately one between NDS BB and frame.