Measuring Wheel Slip-Manually

NOTE: Wheel slip can be easily determined, automatically, with Performance Monitor, if equipped with optional radar unit. (See Controls and Instruments Section.)

1. Mark a tire.

2. With tractor working, mark a starting point on the ground.

3. Follow tractor and mark the ground again where tire completes 10 full revolutions.

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4. At working speed, go back with implement raised. Count revolutions between same two marks.

5. Use second count and chart to determine slippage. Remember 8-12 percent is ideal.

Wheel Slippage Chart
     
Wheel Revolutions (Step 4) Percent of Slip Result
     
     
10   Remove Ballast
9-1/2 5  
     
9 10 Correct Ballast
8-1/2 15  
     
8 20 Add Ballast
7-1/2 25  
7 30  

 

6. Adjust ballast or load to give 8-12 percent slippage at 4.1 mph (6.6 km/h), without exceeding maximum ballast level.

NOTE: Available horsepower is greatly reduced when wheel slip drops below eight percent.

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