CAT 7155 TRANSMISSION FLUID LEVEL PROCEDURES PER L O 9-2320-273-12
"Level should be checked, with engine off,
but two minutes after engine is shut off,
daily, hot or cold.
Drain oil, change breather and clean screen
every 50,000 miles or 12 months.
Refer to TM-9-2320-273-20 for procedure...