Blog category
Yanmar Super Forte AF-22 AF-24 AF-26 AF-28 AF-30 AF-33
Knowledge base for the Yanmar Super Forte MARK III: the AF-22, AF-24, AF-26, AF-28, AF-30 and AF-33. These compact 4WD diesel tractors belong to one family but differ from each other in engine and chassis: the AF-22 and AF-24 have the 3-cylinder 3TNS82 (1425 cc, 82 mm bore), while the AF-26, AF-28, AF-30 and AF-33 have the larger 3TNS84 (1496 cc, 84 mm bore). As a result, the head gaskets, among other things, are not interchangeable between the two groups. Here you’ll find buying advice, technical specifications, maintenance schedules, oil and filter info, operation, hydraulics/PTO, fault diagnosis and storage per topic — plus matching original and aftermarket parts from Shop4trac.
06/07/2026
Buying a Yanmar Super Forte AF-22 to AF-33? Read the experiences, strengths and weaknesses, the engine differences between the models, and what to look out for when buying used.
06/07/2026
Yanmar Super Forte AF won't start, losing power, or running hot? Go through the known faults — from battery and bleeding to overheating.
06/07/2026
The complete maintenance schedule of the Yanmar Super Forte AF series from the manual: all intervals by operating hours, plus the adjustment values for belt, clutch and brake.
06/07/2026
Which filters does the Yanmar Super Forte AF series have? Air, oil and fuel filter with sizes and intervals — plus the correct filters per model.
06/07/2026
Hydraulics, PTO and implements of the Yanmar Super Forte AF series: three-point hitch, PTO speeds and which tiller or flail mower suits 22 to 33 hp.
06/07/2026
All technical specifications of the Yanmar Super Forte AF-22 to AF-33 from the manual: engine, dimensions, weight, tires, PTO and fluid capacities.
06/07/2026
Starting and operating the Yanmar Super Forte AF: thermo-start/preheating, the correct starting sequence, levers and dashboard — step by step from the manual.
06/07/2026
Winterizing and long-term storage of the Yanmar Super Forte AF: coolant, battery, fresh oil, and storage — plus a checklist for restarting.
06/07/2026
Which engine oil and how much oil goes into the Yanmar Super Forte AF-22 to AF-33? All types and exact capacities for engine, transmission, front axle, and coolant.
