Calculating Ballast-Tractors Without Hitch
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| Add enough weight to the rear axle to achieve the desired weight split. Then, to increase total weight per engine horsepower add equal amounts of weight to each axle. The chart below illustrates how weight splits between the front and rear axles are affected as weight is added to the rear axle only. |
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| 1000 lb |
58/42% |
58/421% |
57/43% |
57/43% |
| 2000 lb |
57/43% |
57/43% |
56/44% |
56/44% |
| 3000 lb |
56/44% |
56/44% |
54/46% |
54/46% |
| 4000 lb |
54/46% |
54/46% |
53/47% |
53/47% |
| 5000 lb |
53/47% |
53/47% |
52/48% |
52/48% |
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| Factory Recommendation for Overall Best Performance |
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| Model |
Front Ballast |
Rear Ballast |
Weight Split |
| 9330 |
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3920 lb |
54/46 |
| 9430 |
2800 |
7080 |
53/47 |
| 9530 |
2800 |
7080 |
53/47 |
| 9630 |
2800 |
7080 |
53/47 |
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| * May not require additional ballast if power hop is not a concern. Up to 4000 lb may be required on rear axle to achieve desirable weight split if power hop is a concern. |
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| Cast Weights Required for Ballast Recommendation |
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| 2130 lb - 1-165 lb plus 2-450 lb weights on each dual wheel |
| 2800 lb - 1-1400 lb weight each inner wheel |
| 3930 lb - 1-450 lb installed on each inside/inner wheel and 1-165 lb plus 3-450 lb weights on each rear wheel |
| 7080 lb - 1 set of 20 rear frame weights and 1- 1400 lb installed on each rear inside/inner wheel and 1-165 lb plus 2-450 lb weights on each dual |
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RW29387,00005A6 -19-29NOV07-1/1
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