Put an oil pan  on the table to catch all oil leaks.
Loosen the (6) spindle screws  approximately (2) turns.
Install the protective cap  over the spindle nose.
Caution: The protective cap is necessary. It prevents damage to the spindle when it touches the table in the next step.
Jog the Z Axis in the negative (-) direction until the spindle touches the table. If the spindle does not touch the table, put a wooden or aluminum block under the spindle.
Remove the (6) spindle screws.
Jog the Z Axis in the positive (+) direction until the spindle is fully out of the spindle head.