You need to clear the rad and coolers EVERYDAY. Should be part of your pre use inspection. I 'inspect my machines prior to using them, every morning. Check the tires, check the air pressure, check the lube oil level, check the transmission fluid level inspect the rad screens and if they appear dirty, blow them out and blow the rad out from the fan side not the front side.
Weekly I check the condition of the air filter, battery and grease all the fittings on the tractors and loaders and use my rad Genie and flush out the rad (from the fan side again) with water and check the coolant level in the expansion bottle.
You need to establish a routine and stick to it. Being remiss about daily checks will just cause bigger issues down the road. They are (tractors) machines after all and they need to be maintained or they fail.