Calculating Ballast-Tractor Without Hitch

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.
ADD 9100 9200 9300 9400
         
1000 lb 57/43% 59/41% 59/41% 59/41%
2000 lb 55/45% 57/43% 57/43% 57/43%
3000 lb 53/47% 55/45% 55/45% 55/45%
4000 lb - 54/46% 54/46% 54/46%
5000 lb - - 53/47% 53/47%
         
Factory Recommendation for Overall Best Performance
       
Model Front Ballast Rear Ballast Weight Split
9100   2130 lb * 55/45
9100   3000 lb 53/47
9200   2130 lb ** 54/46
9200   4000 lb 52/48
9300   3920 lb 54/46
9400 2800 7080 53/47
       
* 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 for power hop control
 
Cast Weights Required for Ballast Recommendation
 
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 and 1-165 lb plus 3-450 lb weights on each rear
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

 

RX15494,0000FE9 -19-08SEP00-1/1