Bottom brackets can be seized or stubborn over time
Especially when water gets into the frame or rusting in bottom bracket area
The square tapper bottom bracket contains the cup and unit
The plastic or metal cups can be on either sides
It depends on the brand and model of the bottom bracket
Like the Trek 930, the cup is on the drive side
and the unit is on the non-drive side
On the other hand, the Specialized Ground Control has its cup on the non-drive side
Turn it counter clockwise to remove
and the unit on the drive side
The cup is removed but not the unit on the other side
Heating up the bottom bracket could help to break it loose
Bring out a headset cap and crank arm fixing bolt
Insert the bottom bracket tool
Headset cap and crank arm fixing bolt to secure the tool in place
If the crank bolt is too short, you will then need to find a longer M7 bolt
Turn it clockwise with the wrench
The adjustable wrench didn't work out
So next step is to use the breaker bar with the 32mm socket
Clean the bottom bracket shell
and then lubricate the threads and area