Follow these instructions to keep the ATF cooler cleaner working properly:
Replace the two magnetic nonbypass spin-on filters after every 20 hours of use, based on the hour meter, or when you notice a restriction in the ATF flow.
Check the level and condition of the fluid in the tank before each use.
Replace the ATF in the tank when it looks dark or dirty.

A/C Refrigerant Recovery (With A/C)
caution
Air conditioning refrigerant or lubricant vapor can irritate your
eyes, nose, or throat.
Be careful when connecting service equipment.
...
Alternator Reassembly
If you removed the pulley, put the rotor in the drive-end housing, then torque
its locknut to 110 N·m (11.2 kgf·m, 81 lbf·ft).
Remove any grease or any oil from the ...
Day or Night Mode
Press the (Display mode) button
to manually switch between day and
night mode.
...