Measuring Wheel Slip (Manually)

1. 
   CQ294120-UN-28AUG12

   
   CQ294121-UN-28AUG12

   Step 1: Mark rear tire (A).

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2. Step 2: Mark ground next to rear tire (using a stake) to indicate starting point (B).
3. Step 3: Drive tractor in straight line with implement in field position until rear wheel has completed 10 full rotations (C).
4. Step 4: Mark ground (with a stake) at point where rear wheel completed 10 full rotations (D).
5. Step 5: Return tractor to starting point and cover same route marked out on ground with the implement raised (in transport position). Count the number of rotations completed by rear wheel between the two markers (E).

   The ratio of the number of rotations of the rear wheel with load and without load is the slip rate.

   The formula below is used to draw up the following chart:

   Slip rate (%) =	(Step 3 rotations — step 5 rotations) X 100
   	Time for step 3

   Step 3 rotations	Step 5 rotations	Slip rate (%)
   10	10,0	0
   10	9,5	5
   10	9,2	8
   10	9,0	10
   10	8,8	12
   10	8,5	15
   10	8,0	20
   10	7,5	25
   10	7,0	30

   Step 6: Add more weight if slip is excessive. For rates below minimum, weights must be removed.