TYM T474C heater coolant leak investigation

An owner-operator documents removing the TYM T474C cab roof (five bolts plus antenna disconnect) to hunt down a coolant leak from the HVAC system. He shows the control valve suspected to be the culprit, explains why the cab vents are poorly designed, and notes the lack of rear/side window defrost. Honest spoiler: he never finds the leak. Useful mainly for owners facing the same issue who want to see what roof removal actually involves.

Posted by the Brad's Toy Box channel, apparently an owner-operator using the tractor through a Canadian winter, with no commercial or dealership affiliation evident.