Kubota AT55 Tiller Operator's Manual
This operator's manual is the factory operation and maintenance reference for the Kubota AT55 walk-behind tiller and its GS 200–2T gasoline engine, running roughly 28 pages of controls, operating procedure, adjustment, and maintenance guidance. It's the book that came with the machine: safety instructions, step-by-step engine starting and stopping, rotor and tine assembly, resistance-bar and tilling-depth adjustment, a maintenance check list, and a troubleshooting section. Originally published by Kubota and delivered here as an instant PDF download you can read on any device or print for the cab.
Models covered: Kubota AT55
About the Kubota AT55
The AT55 is a walk-behind rotary tiller powered by the Kubota GS 200–2T — an air-cooled, 4-cycle gasoline engine of 201 cc (12.26 cu. in.) rated at 5.2 HP, with transistor magneto ignition and a recoil starter. Power runs through a belt-tension main clutch, and by changing the V-belt path between the high and low pulleys the machine offers 4 forward and 2 reverse speeds. Standard tilling width is 500 mm (20 in.), and the tiller measures 1,480 mm (58 in.) long by 920 mm (36 in.) wide by 975 mm (38 in.) tall at a weight of 82 kg (180.7 lbs.).
Compact walk-behind tillers like the AT55 stay in service for decades on gardens, small plots, and turf work, and the machine's swing handle, adjustable resistance bar, and travel wheel are exactly the features an owner needs to set up correctly. That's why the original operator's documentation still matters: it carries the starting sequence, the correct oil grades, the rotor and tine orientation, and the adjustments that keep the machine working the way it was built to.
What This Manual Covers
- For safe operation: Safety alert symbol, and safety rules for before starting, operation, transporting, maintenance, and storage.
- Servicing of the tiller: Dealer service guidance and where to locate the tiller and engine serial numbers (handle holder, right-hand side; engine crankcase, left side).
- Specifications: Full machine dimensions and weight, plus GS 200–2T engine data, fuel and tank capacity, ignition and starting systems, speed counts, and axle rpm figures.
- Controls: Engine switch, throttle lever, main clutch lever, main gear shift lever, choke lever, fuel cock lever, handle adjusting knob, and handle swing lever.
- Operating instructions: Pre-start checks, starting and stopping the engine, adjusting the handle height and swinging the handle, mounting and adjusting the resistance bar, assembling the rotors and tines, and using the front wheel for travelling.
- Maintenance: Daily check, break-in period guidance, and a maintenance check list with intervals and lubrication — including engine oil, transmission oil, and air cleaner element service.
- Adjustments: Adjusting the main clutch, and cleaning and adjusting the ignition plug.
- Storage: Cleaning after daily operation and care before prolonged storage.
- Troubleshooting: A dedicated troubleshooting section for tracing operating problems.
Why This Manual Matters
- Correct setup for rotors and tines. The manual shows tine concave-side orientation, the No. 1–No. 2–No. 3 ground-strike order, and rotor-assembly direction of rotation — the details that decide whether the tiller digs correctly.
- The right fluids and intervals. Class SC engine oil (SAE 30 summer / SAE 20 winter), transmission gear oil, and air-cleaner service are laid out on a maintenance check list so you service to schedule rather than by guess.
- Engine-specific operation. Choke, fuel-cock, throttle, and recoil-start procedure for the GS 200–2T are documented step by step, including warm-engine starting.
- Safe handling built in. Slope, reverse-with-rake, refueling, and transport cautions are stated plainly — the operating limits that keep a walk-behind tiller from getting away from you.
- Scarce factory literature. Original operator's documentation for small Kubota tillers is increasingly hard to find — this searchable, restored PDF puts it back in your hands.
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