Tractor Rear Tire Compatibility

In general, tractors with dual rear wheels are needed to provide the weight carrying capacity and stability needed for this drill.

A limited number of tire options are available that can carry a 4.6 m (15 ft) drill with single rear tires. The 6.1 m (20 ft) drill should be used with dual rear tires ONLY.

Both 4.6 m (15 ft) and 6.1 m (20 ft) drills will fit up to tractors with rear dual wheels spaced on 76 cm (30 in.) centers. The drive wheels on the 4.6 m (15 ft) drill will be just outside the outer dual wheel. Be sure to have the 3-point sway blocks in the lock-out position to prevent interference.

The 4.6 m (15 ft) drill will NOT fit up to a tractor with the dual rear wheels on 91, 97 or 102 cm (36, 38 or 40 in.) centers. The drill drive wheel will interfere with the outer dual. It is recommended that the tractor duals be moved to 76 cm (30 in.) centers. If it is NOT possible to move the wheels in, the outer dual may be removed. If the outer dual is removed, be sure to check the weight carrying capacity of the tractor with single rear tires so as NOT to overload tires.

The 6.1 m (20 ft) drill will fit up to a tractor with the rear dual wheels spaced on 91, 97 or 102 cm (36, 38, or 40 in.) centers. The drill drive wheels will need to be repositioned outward to clear outer dual.

The chart on the following page shows weight added to tractor rear axle due to a mounted drill. To determine the weight added to rear axle due to a particular drill, use the total full drill implement code determined earlier and locate the nearest number in column one. The corresponding number in column three gives the approximate weight added to the tractor rear axle due to a drill with that code. Add this weight to the tractor rear axle weight to get the total tractor rear axle load with full drill. Divide this number by the number of rear tires to get the load per tire. Refer to the tractor operator's manual for recommended tires and corresponding tire pressure to carry this load.