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By Counterman
The parts industry is a very diverse marketplace. While the landscape is mostly dominated by retail chains and jobber stores serving the general automotive and light truck segment, there are several other specialized parts vendors catering to imports, collision and refinish, powersports, ag and turf, and OEM vehicle brands. Each requires its own unique set of skills, including the heavy truck market.
For many of us behind the counter, our only experiences with heavy trucks are when stock orders are delivered to our stores. Heavy-duty parts specialists work in a very different setting than the “year, make, model” format of retail parts, or the VIN-driven world of a dealership parts department. On those occasions when even a veteran P2-certified parts specialist is presented with a request for heavy-duty parts, we are required to think a little differently and be prepared to dig a little deeper to find solutions.
Trucks are classified by their gross vehicle weight rating (GVWR), with light trucks like Tacoma, Silverado 1500, F-250, and Ram 3500 representing classes 1-3, up to 14,000 pounds. Medium duty (14,001 to 26,000 pounds) covers class 4, 5, and 6, including models like the Ram 4500, F550, and Kodiak 6500. These medium-duty trucks all feature hydraulic brake systems, and are sometimes catalogued alongside their light-duty counterparts. Heavy-duty vehicles, on the other hand, are catalogued primarily by the major components used to build the vehicle.
Heavy duty generally describes class 7 and 8 trucks, with a GVWR over 26,000 pounds. Some class 7 trucks feature hydraulic or air-over-hydraulic brake systems, but the majority of trucks in these two classes rely on air brakes to stop these heavily loaded vehicles. Air brakes operate much like hydraulic brakes, using air pressure instead of hydraulic fluid to apply brake force when the pedal is depressed. Air pressure is created by an on-board compressor, and distributed through a series of valves and tubing to the foundation brakes (disc or drum brake components). Semi-trailers, when coupled to the tractor’s air supply, operate the same way. In case of a drop in air pressure, spring-loaded parking brakes serve as an automatic emergency brake.
Cataloguing foundation brake parts often requires a combination of measurements, identification of manufacturer-specific design elements, and even axle model numbers. Air components require the understanding and identification of thread pitch and sizing, cross-referencing numbers from multiple vendor information sources, and a solid understanding of what each type of valve does within the system.
Engine, drivetrain and suspension components are similarly dependent on how an individual truck was spec’d from the factory. A cement mixer or tri-axle dump truck requires a considerably heavier suspension design than an over-the-road tractor regularly hauling van body trailers full of potato chips. Even within the same model range, a truck manufacturer might offer engines from Cummins, Caterpillar or Detroit, each one mated to one of several manual or automatic transmission options from Eaton, Fuller or Allison. Throw in Rockwell, Eaton or Dana axle packages in one of a dozen different gear ratios, and the combinations become nearly unmanageable.
In our automotive cataloguing, those drivetrain options (and most other parts requests) would generally be found through a simple year/make/model search, but with HD parts, that’s only the beginning. At the dealership level, VIN entry yields a copy of the build sheet or bill of materials (BOM) with the relevant options identified, and OE part numbers called out in the electronic catalog. For aftermarket professionals, its off to various manufacturer catalogs, searching individual component or assembly model numbers and/or serial numbers to collect part information. With more focus on identification of standalone parts that are not necessarily exclusive to one vehicle manufacturer, it simply requires a different approach than what many parts specialists are used to.
There are instances when traditional aftermarket catalog skills come into play, and many of your existing light vehicle vendors also offer HD parts solutions. Your WD or DC might not stock a full line of heavy-duty parts, but many basics like filtration, lighting, belts, rotating electrical and batteries are often only a daily order away. For slower-moving HD-specific parts, special ordering from existing vendors is often a realistic possibility, assuming your customer can absorb the downtime.
Most heavy-duty customers are commercial operators, and time spent waiting on parts is money lost for their businesses and yours. Quick turnaround times for these orders are an everyday expectation in the HD world, so last-moment requests and expedited shipping charges are common. For a parts specialist who enjoys a challenge, the occasional HD parts lookup represents a chance to flex their interchange and cross-reference muscles, and maybe even learn new ways of problem-solving that can be applied to their “regular” daily tasks!
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By Muhammad
When it comes to vehicle maintenance, auto spare parts play a crucial role in ensuring optimal performance, safety, and longevity. Every vehicle is composed of thousands of individual components, and over time, wear and tear can lead to the need for replacements. Whether you're a DIY enthusiast or rely on professional mechanics, understanding the significance of quality auto spare parts can save you time and money while keeping your vehicle in top condition.
The Importance of Quality Auto Spare Parts
Quality should always be a priority when it comes to auto spare parts. Genuine parts are manufactured by the original equipment manufacturers (OEMs) and are designed specifically for your vehicle's make and model. They ensure compatibility and reliability, which is vital for safety. Aftermarket parts, while often more affordable, can vary in quality, and it's crucial to choose reputable brands when opting for these alternatives.
Investing in high-quality auto spare parts can lead to several benefits, including:
Enhanced Performance: Quality parts work seamlessly with your vehicle’s existing systems, leading to improved performance and efficiency.
Increased Safety: Reliable components ensure that essential systems, such as brakes and steering, function correctly, reducing the risk of accidents.
Longevity: Genuine and high-quality aftermarket parts typically last longer, minimizing the frequency of replacements and associated costs.
Warranty Protection: Many manufacturers offer warranties on genuine parts, providing peace of mind and protecting your investment.
Common Types of Auto Spare Parts
Auto spare parts can be categorized into several types, each serving a distinct purpose in vehicle operation. Here are some of the most common categories:
Engine Components: These parts are crucial for the functioning of your vehicle's engine. They include pistons, cylinder heads, timing belts, and gaskets. Regular inspection and timely replacement of engine components can prevent significant issues and costly repairs.
Braking System Parts: The braking system is one of the most vital safety components of any vehicle. Brake pads, rotors, calipers, and brake lines are essential for ensuring your vehicle stops effectively. Using high-quality brake components can dramatically improve braking performance.
Suspension and Steering Parts: These parts include shocks, struts, control arms, and tie rods. They are essential for vehicle handling, ride comfort, and safety. Worn suspension components can lead to poor handling and uneven tire wear.
Electrical Components: Modern vehicles rely heavily on electrical systems for everything from ignition to entertainment. Auto spare parts in this category include batteries, alternators, starters, and fuses. Ensuring these parts are functioning properly is essential for vehicle reliability.
Transmission Parts: The transmission system is responsible for transferring power from the engine to the wheels. Components like clutches, gears, and seals must be in good condition to ensure smooth gear changes and optimal performance.
Body and Interior Parts: While these parts may not directly affect vehicle performance, they play a significant role in aesthetics and comfort. Components such as mirrors, windows, upholstery, and body panels are essential for maintaining the vehicle's appearance and comfort.
How to Choose the Right Auto Spare Parts
Choosing the right auto spare parts can sometimes be daunting, especially with so many options available. Here are some tips to help you make informed decisions:
Identify the Exact Part Needed: Use your vehicle’s manual or consult with a professional to identify the specific part you need. Having the correct part number can save time and avoid compatibility issues.
Research Brands and Suppliers: Look for reputable brands known for their quality. Research online reviews and testimonials to ensure you’re choosing reliable suppliers.
Consider Your Budget: While it may be tempting to opt for the cheapest option, remember that quality should not be compromised. Investing in slightly more expensive, high-quality parts can lead to long-term savings.
Check Warranty Information: Always check if the parts come with a warranty. This not only provides peace of mind but also indicates the manufacturer's confidence in their product.
Seek Professional Advice: If you’re unsure about which parts to choose, consult with a professional mechanic. They can provide valuable insights and recommendations based on their experience.
The Role of All Makes Auto Parts
At All Makes Auto Parts, we understand the significance of having access to quality
link hidden, please login to view. Our mission is to provide a reliable source for both genuine and aftermarket parts for all vehicle makes and models. Located in the heart of Dubai, we offer an extensive inventory that ensures you can find exactly what you need, whether for routine maintenance or urgent repairs. Our dedicated team is passionate about automobiles and committed to delivering exceptional customer service. We work tirelessly to ensure that our customers receive the right parts at competitive prices, along with expert advice to guide their choices.
Conclusion
Auto spare parts are an essential aspect of vehicle maintenance, contributing to performance, safety, and longevity. Understanding the importance of quality components, knowing the different types available, and being informed about how to choose the right parts can significantly impact your driving experience. At All Makes Auto Parts, we strive to be your trusted partner in keeping your vehicle in optimal condition. Whether you need engine components, braking parts, or anything in between, we’re here to help you every step of the way.
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By Counterman
Hybrid vehicles place greater stress on belts and tensioners due to their dual-mode systems. Specialized hybrid tensioners are engineered to handle varying torque demands and ensure optimal belt performance during rapid transitions between electric and gasoline modes, reducing wear and improving efficiency.
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By Counterman
f you read automotive articles on a regular basis, you’ve no doubt read about the scientific side of brakes many times. They convert kinetic energy, which is the energy of motion, into heat energy through friction between the brake linings and the drum or rotor. Because of this, brakes get hot…real hot…and dissipating the heat is one of the most critical factors affecting brake operation.
So, would you believe that shock absorbers work off the same scientific basis of converting kinetic energy into heat energy? It’s true, and here’s how it works.
Kinetic energy is the energy of motion. The springs on a vehicle support the weight of it and allow the suspension to move. But what would happen if there were no shock absorbers? Every time you hit a bump, the springs would compress then expand, and do this over and over again until they finally settled down.
If you’ve never experienced the sensation, which is something like rocking on a boat, you’ve likely seen it on a car going down the road. The front or rear goes up and down, up and down, literally “bouncing” down the road. It happens, in this case, not due to the lack of shocks, but due to the fact that they are simply worn out, so for all practical purposes, they may as well not exist.
link hidden, please login to view The springs absorb the kinetic energy from hitting a bump, but since springs are considered elastic objects, the energy is turned into potential energy. And, in the case of a spring, or any elastic object, the potential energy is then released, and the energy output equals the energy input. The spring will return to its original shape. At that point, the momentum of the car body creates kinetic energy, which in turn acts on the spring in the opposite direction. As you can see, this is a vicious circle, and we need shock absorbers to control it.
The job of a shock absorber is therefore to control the kinetic and potential energy of a spring by dampening its movement. Shock absorbers are filled with hydraulic oil, separated between two different chambers. Between the two chambers is a piston and valve assembly. (See Figure 1). The piston is connected to a piston rod which moves in and out of the shock as the suspension moves.
Compression is when the piston rod is forced into the shock; rebound is when the piston rod is pulled back out. The key lies in the valving, which restricts the flow of oil between the two chambers. Forcing the oil through these valves creates friction, which in turn creates heat. Yes, shocks do get hot, and now the shock has turned kinetic energy into heat energy.
Changing the size of these valves changes the amount of force it takes for compression or rebound, which ultimately changes the ride characteristics of the vehicle. This is one of the main reasons there’s a difference in feel between a sports car and a luxury car.
The more restrictive the compression and rebound, the less the suspension spring will move, which provides improved handling and stability characteristics, such as those desired on a sports car, but this also results in a firmer ride. Less restrictive compression and rebound allows greater spring movement and a softer ride, but not as good handling characteristics. There’s always a tradeoff.
The comparison between the compression and rebound forces in a shock absorber is the shock ratio. Many standard shocks have a 50/50 ratio, meaning the compression and rebound forces are equal. Unequal forces one way or the other can have a drastic effect on handling, and one of the best examples to demonstrate this is with some old school drag racing tech. In drag racing, it’s important to shift the weight to the rear of the vehicle to increase traction while launching. One of the ways to attain this is by using 90/10 shock absorbers on the front.
What this means is that of the total compression and rebound forces, 90% of the force is required to compress the shock, but only 10% of the force is required to extend the shock. When launching, the front of the car wants to lift as weight shifts to the rear. With a 90/10 shock, the front will unload easily and allow the weight to shift to the rear. Then, since it takes a much greater force to compress the shock, instead of the car coming right back down and bouncing in the front after hitting the track, the shocks will remain extended with the weight shifted rearward, and slowly settle as the car goes down the track.
It often takes a while and a few different adjustments with shock ratio, both front and rear, to get a drag car suspension properly “tuned” in. By the same token, stock vehicles, either performance or luxury, are engineered to find the best of both worlds in handling versus comfort. So, the next time you talk about shocks to your customer, make it fun and talk a little science.
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