The 120 D model from the Pettibone / AG Mercury series does have the capacity to tow 120,000 Lbs under optimal operating conditions.

The spec sheet indicates the Draw Bar Pull (pulling force at the hitch), which is not the total weight of the trailer itself, but the horizontal force required to overcome resistance and move a rolling load.

Estimated Towing Capacity

• Maximum Drawbar Pull: 12,000 lbs (53,379 N) on a flat, solid surface.

• Vehicle Weight: 13,800 lbs (6,260 kg).

• Approximate Towed Load Capacity: 240,000 lbs to 300,000 lbs on level ground.

Key Factors:

• Requested Load (80,000 to 120,000 lbs): The tractor will operate well within its continuous duty range (around 30%–50% of its maximum drawbar pull), so it will handle this easily on flat ground.

• Rolling Resistance: The standard rule of thumb estimates that moving 1,000 lbs on wheeled equipment over dry, level concrete requires about 40 to 50 lbs of horizontal pull force. Dividing the 12,000 lbs of drawbar pull by 40–50 lbs per 1,000 lbs yields a theoretical starting capacity of 240,000 to 300,000 lbs.

• Incline/Ramps: As noted at the bottom of the spec sheet, drawbar pull is reduced on ramps or inclines, as part of the pulling force is consumed overcoming gravity.

• Ground Conditions: Requires dry, clean concrete free of oil or loose gravel to prevent tire slip.