Measure Wheel Slip—Manually

LV733-UN-25JUN94

A - Tire Mark

B - Starting Point

C - Marking after ten Revolutions

D - Marking in Opposite Direction

1. Draw a tire mark (A) on one rear tire (a chalk mark is recommended).

2. With tractor working, mark a starting point (B) on the ground at the place where tire mark (A) meets the ground.

3. Mark the ground again where tire mark (A) completes ten revolutions (C).

4. With implement raised, return in the opposite direction. At the second mark on the ground remark tire.

5. While driving the tractor along the same path (implement raised), count the tire revolutions required to reach starting point (B).

6. Use count of return tire revolution and Wheel Slippage.

   NOTE: Ideal wheel slippage. 10—15 % for two-wheel drive tractors or 8—12 % for four-wheel drive tractors.

7. Adjust ballast or load to give correct slippage.

   NOTE: Available horsepower is greatly reduced when the wheel slip drops below 10 %.

   WHEEL SLIPPAGE CHART
   Non-Loaded Wheel Revolutions (Step 5)	Estimated % Slip	Recommended Action
   10	0	Remove Ballast
   9-1/2	5	Remove Ballast
   9	10	Proper Ballast
   8-1/2	15	Proper Ballast
   8	20	Add Ballast
   7-1/2	25	Add Ballast
   7	30	Add Ballast