strategies to change the final drives of a fleet of 100 ton trucks
TRANSCRIPT
Strategies to change the final drives of a fleet of 100 ton trucks
Agenda
1. Introduction
2. Developed methodology
3. Results
4. Conclusions & limitations
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Agenda
1. Introduction
2. Developed methodology
3. Results
4. Conclusions & limitations
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1. IntroductionThis study evaluates the alternatives to
Change the final drives for:
repaired - exchanged - new
for 100 ton trucks
identifying strategy of the lesser
costs per hour2/20
1. Introduction
This study was done over:
• 8 - 100 ton trucks
• 5 year history information
• 28 final drive changes
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Agenda
1. Introduction
2. Developed methodology
3. Results
4. Conclusions & limitations
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2. Developed methodology
• Identify useful life & costs of thecomponents new, repaired and exchange
• Acquisition costs, inventory & transports
• Repairs considered only by the dealer
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2. Developed methodology
• Changes considered only whencondition monitoring was indicated
• Not considered to changecomponents based on hours of operation
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2. Developed methodology
• This methodology does not considercosts related to loss of profit causedby unavailability
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2. Developed methodology
We must minimise the following function:
Costs component, new, repaired or exchange_____________________________________________________________________________________________________________________________ ______________________________________________________________________________________________________________________________________________________
Life component, new, repaired or exchange
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Agenda
1. Introduction
2. Developed methodology
3. Results
4. Conclusions & limitations
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3. Results
Results costs per hour (US$/Hrs) of
operation final drive alternatives
significantly vary
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3. Results
¿How do they evolve in time
cost per hour between 2006 to
2010 ?
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3. Results
Two dimention graphic if we
consider:
Axis X: Useful life of component
(hour)
Axis Y: Dollars per hour (US$/hrs)
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0,0
2,0
4,0
6,0
8,0
10,0
0 5.000 10.000 15.000 20.000 25.000
Useful life (hour)
Do
llars
pe
r h
ou
r(U
S$/H
ou
r)
0,0
2,0
4,0
6,0
8,0
10,0
0 5.000 10.000 15.000 20.000 25.000
Useful life (hour)
Do
llar
pe
r h
ou
r(U
S$/H
ou
r)
3. Results
Type Dollar per hour (US$/hrs) Relative cost
Repaired 3,42 1,00 (Base Line)
New 6,48 1,90 (90% plus)
Exchange 8,71 2,55 (155% plus)
Prior results can be seen in the followingtable
Preferred option
Evitable option
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Agenda
1. Introduction
2. Developed methodology
3. Results
4. Conclusions & limitations
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4. Conclusions
• Repaired final drive performance 3,42 dollar per hour (preferred option)
• Exchange final drive performance 8,71 dollar per hour (evitable option)
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4. Conclusions
• 85% of all cases, cost per hour a final drive new is greater than repaired
• 100% of all cases, cost per hour a final drive exchange is greater thanrepaired
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4. Limitations
• This methodology does not considercosts related to loss of profit causedby unavailability
• There is a limited amount of information of repaired component (5 units) and exchange (3 units)
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4. Commentaries
• Nevertheless, limited informationexisting, give us the first tendenciesuseful life and costs for the differenttype of restorations (new, repaired, exchange) for final drives
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Thanks You
Very Much !!!
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Víctor Barrientos Boccardo
Mine Maintenance Advisor
Skype : victor.barrientos.boccardo
Celular : 99424322