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Read articles →A real-world repair video, not a planned how-to: the owner accidentally drained his coolant during a job and is now figuring out the flush-and-fill process himself, referencing forums and the manual on camera. Covers removing the reservoir bottle, locating the radiator drain plug, flushing with water, mixing coolant ratio (7-quart system capacity), and coolant selection debate. Best for L3901 owners doing a first coolant service with no prior experience.
An owner-operator sharing a practical fix from his own farm, having researched the process himself rather than speaking from prior mechanical expertise.
It is located right next to the oil filter, a large plastic plug with a big Phillips head that can be removed with a large screwdriver or flathead.
The coolant system capacity is about seven quarts, roughly one and three quarter gallons.
The manual only says to use an ethylene glycol type coolant and does not specify anything about nitrates, borates, phosphates, or brand.
It has a tab on the back. Flex the bottle and wiggle it, then it can be lifted off and the cap removed to dump remaining fluid.
