The 3118 was the small wheel AH model that was powered by the Onan Performer P218 engine just like the 3018 and 4018 models. All the AH 3100/4100 series machines used the same bigger Hydraulic pump at nearly 12 Gallons Per Minute and getting close to 3000 PSI. These machines had a tandem pump with one section providing hydraulic power for just the power steering and the other pump servicing the drive system as well as the lift and attachment power system through the hydraulic PTO.

Not many 4116 were made but they were offered for roughly a year as to where the other AH models were sold for 2 to 3 years. But they were discontinued as the market did not seem to support the prices. With the bigger pumps and hydraulic-powered attachments, the cost over a 3000/4000 series tractor was significantly more. The 4116 was powered by a P216 16-horsepower engine.

The 4118 has an Onan P218 engine under the hood. The AH models had 48 or 60-inch hydraulic power mower deck options and 48-inch hydraulic driven snow blowers.

The 4120 was pushed as the flagship machine while it was being offered. With the big Onan 20-horse P220 and the Big hydraulic pump, it is a force to be reckoned with. It has noticeably more power than other models and those other models are beasts in their own right.  The AH tractors could power two hydraulic attachments at once. They often powered the hydraulic deck and the hydra vac blower/vac unit. This is our personal 4120 we redid in the summer of 2022 and we use it often as one of our main workhorses.

The rear and elusive Diesel-powered AH models. Though only a handful were made they are highly sought after by collectors and users alike. They had a 3-cylinder 18-horsepower respected Perkins engine. The frame had length added to the front so the engine and radiator could fit. So they are long hood machines. The 3118 D was the small-wheel diesel option machine.

Maybe the holy grail for some is to get their hands on the Big wheel diesel AH model the 4118-D. They have a mean all-business look to them with the long hood, big wheels, and set back axle they just look like they do not want to be parked, but out working.