Lower the mower to the ground.
Raise the lift arm links on both sides to raise the back of the mower frame approximately 12" off the ground.
This should give enough room to slide your fingers under the subsole.
The subsole should "float" over the ground when adjusted properly.
When you raise the mower frame, it should be about 18" off the ground.
The bottom of the cutter bar should be about 10" from the ground.
The end of the cutter bar should be about 41" from the ground.
These settings should keep the flywheel out of the dirt.
Hope this helps.