Calculate Maximum Commodity Weight for Road Transport—1910

A88013-UN-09OCT15

Towing with an underweight tractor can result in loss of control during transport or braking, resulting in serious injury or death.

Transporting at speeds greater than 32 km/h (20 mph) can result in loss of control and serious injury or death.

If an implement is attached to the rear of a tow-behind cart or seeding tool, add the implement weight to the total weight of the cart and seeding tool.

To determine the tractor weight, refer to the tractor Operator's Manual.

Use the following calculations to determine maximum cart fill for safe roadway transport.

Road Transport at 32 km/h (20 mph)
Formula	Calculation	Result	Example kg	Example (lb)
A		Tractor Weight1	22 680	50 000
B	Formula A times 1.5		22 680 x 1.5 = 34 020	50 000 x 1.5 = 75 000
C		Braking Capacity of Cart2	0	0
D	Formula B plus Formula C	Maximum Tractor Towing Capacity	34 020 + 0 = 34 020	75 000 + 0 = 75 000
E		Weight of the Seeding Tool3	14 069	31 017
F		Weight of the Empty Cart2	7031	15 500
G		Weight of the Rear Implement (if any)4	3629	8000
Formula G must not exceed the 9979 kg (22 000 lb) rated capacity of the cart rear hitch.
H	Formula E plus Formula F plus Formula G	Total Empty Weight Behind the Tractor	14 069 + 7031 + 3629 = 24 729	31 017 + 15 500 + 8000 = 54 517
I	Formula D minus Formula H	Potential Fill Capacity of the Cart	34 020 - 24 729 = 9291	75 000 - 54 517 = 20 483
J		Tire Weight Limit (Transport)2	8119	17 900
K	Smaller value of Formula I and J	Maximum Commodity Fill (Transport)	8119	17 900

Use the following table to determine your specific commodity weight restriction. Multiply tractor weight by local road transport regulations not exceeding 1.5.

Commodity Weight Calculation
Formula	Calculation	Result	Example
A		Tractor Weight
B	Formula A times 1.5
C		Braking Capacity of Cart
D	Formula B plus Formula C	Maximum Tractor Towing Capacity
E		Weight of the Seeding Tool
F		Weight of the Empty Cart
G		Weight of the Rear Implement (if any)
H	Formula E plus Formula F plus Formula G	Total Empty Weight Behind the Tractor
I	Formula D minus Formula H	Potential Fill Capacity of the Cart
J		Tire Weight Limit (Transport)
K	Smaller value of Formula I and J	Maximum Commodity Fill (Transport)	5

Use the Maximum Commodity Fill (Transport), tanks size information, and product density in the Implement and Commodity Weight Charts to determine maximum bushels of each commodity for transport.

Example Calculation2
				kg		(lb)		Calculations
Tank	Size (bushels)	Fill (bushels)	Product	Weight per Bushel6	Weight per Tank	Weight per Bushel6	Weight per Tank	Weight per Bushel6	Weight per Tank
Front	200	0			0		0
Middle	150	150	Barley	21	3150	48	7200
Rear	200	200	Urea	24	4800	54	10 800
Total					7950		18 000

In this example, the total weight in the tanks is more than the calculated Maximum Commodity Fill (Transport) and is not acceptable for road transport. If the rear tank were 75% full (150 bushels) of urea, the total weight would be slightly less than the Maximum Commodity Fill (Transport).