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Read articles →An owner-led walkthrough of the transmission hydraulic fluid change on an RK55, covering the drain plug location (driver-side, 7/8-inch socket), a $40 hand-pump fill setup, the fill port, and a broken dipstick workaround. Real numbers: 10 quarts actual fill, 9.24-gallon stated capacity. Notably, the creator recommends Providence Automotive fluid over the manual's spec, citing Rural King dealer advice. Most useful to RK55 owners doing this service for the first time.
Posted by the hurley_001 channel, appearing to be an owner-operator sharing first-hand experience maintaining their own RK55.
It is on the driver side (left side) of the tractor, by the back wheel, straight across from the wheel. It takes a 7/8-inch socket and may need a cheater bar to break loose.
It took 10 quarts to fill the transmission case. The manual lists capacity as 9.24 US gallons, so start checking the dipstick around 8.5 gallons.
The manual says API GL4 grade 80 weight gear oil, but Rural King's dealer recommends Providence Automotive, which they use on all their tractors.
You can still check the fluid by using pliers to pull the broken dipstick out.
