6.3 - Special High Wear Items Costs
Enroll to start learning
You’ve not yet enrolled in this course. Please enroll for free to listen to audio lessons, classroom podcasts and take practice test.
Interactive Audio Lesson
Listen to a student-teacher conversation explaining the topic in a relatable way.
Fuel Consumption Rates
🔒 Unlock Audio Lesson
Sign up and enroll to listen to this audio lesson
Today, we'll discuss the fuel consumption rates for different engines. Can anyone tell me what standard fuel consumption for a gasoline engine is?
I believe it's 0.06 gallons per horsepower hour.
Correct! And for diesel engines, it is 0.04 gallons. Why do you think we need to adjust these values for project conditions?
Because the machines won’t always operate at maximum output, right?
Exactly! Adjustments are based on load factors and operational time. Can anyone tell me how we might adjust these rates?
We multiply by the operating factor which considers how long and how loaded the engine is.
Great! Remember, operational conditions can greatly influence fuel consumption. That's a key point!
Estimating Hourly Fuel Costs
🔒 Unlock Audio Lesson
Sign up and enroll to listen to this audio lesson
Now let's discuss estimating hourly fuel costs. Can anyone outline the steps to calculate this?
We need to know the hourly fuel consumption and the cost of fuel.
Correct! So if our machine uses 26.44 liters per hour and fuel costs 60 rupees per liter, what's our hourly cost?
That would be 1586.4 rupees.
Yes! It's crucial to also consider different project conditions that may influence fuel consumption. Can anyone give an example of such a condition?
Working on poorly maintained roads requires more fuel compared to well-maintained roads.
Excellent example! Always consider these factors when estimating costs.
Lubricating Oil Costs
🔒 Unlock Audio Lesson
Sign up and enroll to listen to this audio lesson
Let's dive into lubricating oil costs. How do we determine how much oil our engine needs?
We base it on the engine size, project conditions, and how often we change the oil.
Exactly. If conditions are dusty, we may need to change oil more frequently. What guidelines can we use for the amount of oil consumed?
The Caterpillar performance handbook provides specific tables based on the machine model.
Well done! We can also use theoretical formulas to estimate how much oil we will use per hour based on horsepower.
High Wear Items
🔒 Unlock Audio Lesson
Sign up and enroll to listen to this audio lesson
Now let's talk about high wear items. Who can name some examples of these?
The cutting edge of bulldozer blades and bucket teeth!
Correct! These items wear out quickly. How do we calculate the cost of replacing them?
By figuring out the unit cost and expected lifespan of each item.
Good! This information is often provided by manufacturers. Why is it important to track these costs?
To better manage budgets and ensure we don't overspend on maintenance!
Spot on! Understanding these elements is crucial for effective project management.
Introduction & Overview
Read summaries of the section's main ideas at different levels of detail.
Quick Overview
Standard
The section outlines theoretical fuel consumption rates for gasoline and diesel engines, discusses adjustments based on project conditions, and elaborates on how to estimate the costs associated with fuel and lubricating oil. It highlights the significance of special high wear items that require more frequent replacement due to their rapid deterioration, providing insights into calculating their costs effectively.
Detailed
Detailed Summary
This section delves into the theoretical values for fuel consumption of gasoline and diesel engines, providing standard values under maximum output conditions, and emphasizes the necessity of adjusting these values based on specific project conditions such as load factor and time factor. The fuel consumption rates differ significantly between various machinery types and conditions. Furthermore, it introduces methodologies for estimating the hourly fuel cost by linking fuel consumption rates with local fuel prices.
The costs for lubricating oils are also discussed, with considerations for engine size, project conditions, and service intervals affecting oil change frequencies. A formula is provided to estimate lubricating oil consumption based on horsepower and operational factors.
Additionally, the concept of high wear items is introduced, including specific components like bulldozer blades and ripper tips that deteriorate quickly and require frequent replacements. The section concludes with guidance on calculating the hourly costs for these items based on manufacturer guidelines and usage records.
Audio Book
Dive deep into the subject with an immersive audiobook experience.
Introduction to High Wear Items
Chapter 1 of 4
🔒 Unlock Audio Chapter
Sign up and enroll to access the full audio experience
Chapter Content
Special items known as high wear items deteriorate and subject to wear and tear at a faster rate. These have a shorter life than the remaining parts of the equipment.
Detailed Explanation
High wear items are components of machinery that wear out quickly due to their usage and the harsh conditions they operate in. This deterioration leads to a need for frequent replacements, making it crucial to understand their impact on costs related to operation and maintenance.
Examples & Analogies
Think of the tires on your car; they get worn out much quicker than other parts of the car due to constant contact with the road. Similarly, high wear items on machinery like bulldozer blades and excavator teeth experience rapid wear and need regular replacement.
Examples of High Wear Items
Chapter 2 of 4
🔒 Unlock Audio Chapter
Sign up and enroll to access the full audio experience
Chapter Content
Examples include the cutting edge of a bulldozer blade, ripper tips used for loosening soil, and bucket teeth on excavators. These parts must be replaced more frequently due to their wear.
Detailed Explanation
The cutting edge of a bulldozer blade is designed for tough jobs, and as it continuously works against hard materials, it wears down faster than the blade itself. Similarly, the tips of rippers and bucket teeth are prone to rapid wear due to direct contact with the soil, making them high wear items that require regular maintenance to ensure efficiency.
Examples & Analogies
Imagine constantly scraping a hard surface with a wooden stick. Over time, the tip of the stick would wear down, and you would need to replace it to keep working effectively. Just like that, equipment must have their high wear items replaced regularly to maintain operation.
Cost Calculation for High Wear Items
Chapter 3 of 4
🔒 Unlock Audio Chapter
Sign up and enroll to access the full audio experience
Chapter Content
To calculate the hourly cost of high wear items, one must know the unit cost of the item and the expected life of the item. This information can often be sourced from past records or manufacturer handbooks.
Detailed Explanation
Calculating the hourly cost of high wear items involves determining how much it costs to maintain them based on their lifespan and replacement frequency. For example, if a ripper tip costs $100 and lasts for 200 hours of operation, the hourly cost would be $100 divided by 200, equating to $0.50 per hour.
Examples & Analogies
Think of it like budgeting for your smartphone. If your phone costs $600 and lasts for 3 years (or about 2,628 hours of active use), you could calculate that it costs you about $0.22 per hour to use your phone (since $600 divided by 2,628 hours equals approximately $0.22). Similarly, calculating the cost for high wear items helps in budgeting for machinery use.
Importance of Manufacturer Information
Chapter 4 of 4
🔒 Unlock Audio Chapter
Sign up and enroll to access the full audio experience
Chapter Content
Information regarding the expected life of wear items can often be obtained from manufacturer handbooks, which provide insights based on different operating conditions.
Detailed Explanation
Manufacturers often provide detailed guidelines and data regarding the lifespan of various components under different operating conditions. This helps equipment managers forecast wear and replacement costs more accurately. Staying updated with this information is vital for effective budgeting and maintenance planning.
Examples & Analogies
This is similar to following a maintenance schedule for your car as advised by the manufacturer. They might provide guidance on when to replace tires or change oil based on various driving conditions. Following such guidelines ensures that the car operates smoothly and reduces the likelihood of unexpected repair costs.
Key Concepts
-
Fuel Consumption Rate: The rate at which an engine consumes fuel under specified conditions, which varies based on project conditions.
-
High Wear Items: Components of machinery that wear out rapidly and need frequent replacement, impacting operating costs significantly.
-
Operating Factor: A calculation that incorporates how long and at what load level machinery operates, used for adjusting theoretical equations.
-
Lubricating Oil Costs: Expenses incurred for oil, calculated based on engine size and usage conditions.
Examples & Applications
A gasoline engine operating may consume 0.06 gallons per horsepower hour, while a diesel engine consumes 0.04 gallons in the same timeframe.
When working on rough terrains, the fuel consumption of a loader significantly increases compared to working on smooth roads.
Memory Aids
Interactive tools to help you remember key concepts
Rhymes
When engines roar and blades do tear, watch your costs and replace with care.
Stories
Imagine a bulldozer working tirelessly on a rough landscape, its cutting edge worn down with each passing hour. The operator knows to regularly check and replace this high wear item before it fails.
Memory Tools
Use the acronym H.O.W.S. to remember: High wear items Use Short intervals.
Acronyms
FUEL
Fuel Usage Equals Lifespan - highlights the relationship between fuel use and item replacement.
Flash Cards
Glossary
- Fuel Consumption Rate
The amount of fuel consumed by an engine per unit of power produced over a specific time (e.g., gallons or liters per horsepower hour).
- Operating Factor
A multiplier based on time and load factors that adjusts theoretical fuel consumption rates to reflect actual working conditions.
- High Wear Items
Components of machinery that experience rapid deterioration, necessitating frequent replacement, such as cutting edges and bucket teeth.
- Lubricating Oil
Fluids used to reduce friction between the moving parts of machinery, the cost of which can vary based on engine size and project conditions.
- Mobilization Cost
Expenses incurred to transport equipment to a job site, including loading, unloading, and transportation fees.
Reference links
Supplementary resources to enhance your learning experience.