EXECUTION OF STUDY
1. Team : PT SIS Adaro, PT UT Adaro, Team AED UT
2. Location : Adaro Coal Mine
3. Machine : PC1800-6, PC3000-6, HD785-5
PC1800-6 TIME MOTION STUDY
1) EX041
Findings :
- Less Bucket Fill Factor
- Unproper material position in vessel truck
- Big Excavating angle
- Average Primary Cycle time : 37.09 sec/pass
PC1800-6 TIME MOTION STUDY
2) EX062
Findings :
- Good Bucket Fill Factor
- Good Bench height
- Side digging position
- Average Primary Cycle Time : 28.89 sec/pass
PC1800-6 TIME MOTION STUDY
3) EX041
Findings :
- Unproper excavating digging method
- Correct Mode Operation
- Correct material position in vessel
- Average primary cycle time : 27.89 sec/pass
PC3000-6 TIME MOTION STUDY
4) EX057
Findings :
- Good material position in vessel
- Less Bench Height
- Unproper excavating method
- Average Primary Cycle Time : 33.87 sec/pass
EXCAVATOR CYCLE TIME FIGURE
Source : Komatsu Spec. Handbook (26 edition)
EXCAVATOR OBSERVATION RESULT
PC1800-6 TEST
PC3000-6 TEST
MACHINE FUEL CONSUMPTION
SUGGESTION
1. DIGGING METHOD
Hard material: 30 deg
Soft material: 60 deg
Benefit :
a. Optimum power usable
b. Efficent operation
Use full power of cylinders
SUGGESTION
2. Stability
SUGGESTION
3. Bench Height
DUMP TRUCK OBSERVATION
1. Road Profile
ROAD PROFILE EX41
DUMP TRUCK OBSERVATION
1. Road Profile
ROAD PROFILE EX60
DUMP TRUCK OBSERVATION
1. Road Profile
ROAD PROFILE EX1200
DUMP TRUCK OBSERVATION
2) Result
Loader : PC1800-6 EX 041
DUMP TRUCK OBSERVATION
3) Working Condition
Good Road Width
Uneven Weigth Distribution
High Rolling Resitance
SUGGESTION
1. Road Chamber
Source : Maintenance Off The Road Tires (Bridgestone)
SUGGESTION
2. Effective haul distance
SUGGESTION
3. Grade
Grade MAXIMUM 10%
High Grade Effect :
- Large decrease in drive system components
o Accelerated mechanical component wear
o Exceed thermal capacity ratings
- Changes in engine life
- Changes in productivity
- Changes in Tire Life
SUGGESTION
4. Grade Effect
Source : Maintenance Off The Road Tires (Bridgestone)
SUGGESTION
5. Rolling Resistance
SUGGESTION
6. Payload
Source : Maintenance Off The Road Tires (Bridgestone)
LOAD PER TYRE (HD785-5)
