4.5. Final Productivity Calculation

Try these first

1. 1.

   What is the bucket fill factor?

   Hint

   Think about how different materials affect bucket efficiency.

2. 2.

   What happens when the loader's bucket is overloaded?

   Hint

   Consider what tipping load means.

3. 3.

   What does the bucket fill factor adjust?

   • Rated bucket capacity
   • Loader speed
   • Tipping load

   Hint

   Consider what affects how full a bucket can realistically be.

4. 4.

   True or False: A track-mounted loader gives better tractive effort than a wheel-mounted loader.

   • True
   • False

   Hint

   Think about different mounting systems.

5. 5.

   A loader has a heaped capacity of 3.0 m³ and fills 75% when handling gravel. Its tipping load is 9000 kg. If the unit weight of gravel is 1600 kg/m³, calculate the productivity in kg/hr for a cycle time of 35 seconds.

   Hint

   Step through the calculations carefully, converting units where needed.

6. 6.

   If a track-mounted loader can carry 10 tons per load, with a tipping load safety factor of 0.35, what is the maximum load it can safely carry?

   Hint

   Remember the safety factor reduces how much we can load safely.