The CAT 226A skid steer loader, a prominent piece of machinery in the heavy equipment industry, is widely regarded for its versatility, compact size, and powerful hydraulic system. Caterpillar, known for its quality and innovation, has equipped the 226A with features that make it ideal for a variety of tasks, from landscaping to construction and demolition. This article delves into the key features of the CAT 226A, common issues encountered by operators, and tips for maintenance and troubleshooting to ensure its longevity.
Key Features of the CAT 226A Skid Steer
The CAT 226A skid steer loader is a part of Caterpillar's well-known line of compact track loaders. It's designed to offer both power and maneuverability, which makes it suitable for a range of applications, particularly in tight spaces. Here’s an overview of its key features:
1. Engine and Power
The CAT 226A is powered by a reliable Cat 3024C engine. With a rated horsepower of approximately 58 horsepower, this skid steer is capable of tackling heavy lifting and digging jobs. The engine is known for its fuel efficiency and durability, providing operators with consistent power for a variety of tasks.
2. Hydraulic System
The hydraulic system is one of the most critical components of any skid steer loader, and the 226A does not disappoint. With a high-flow hydraulic system, the 226A can operate a wide range of attachments, making it versatile for various tasks such as grading, lifting, and material handling. The auxiliary hydraulic flow is designed to be adjustable, providing flexibility depending on the attachment in use.
3. Comfort and Operator Experience
Caterpillar has focused heavily on operator comfort and ease of use. The 226A is equipped with a spacious operator compartment and an ergonomic joystick control system. The visibility is excellent, allowing operators to have a clear view of their work area, which is essential for precision tasks. Additionally, the suspension seat and adjustable armrests enhance comfort during long working hours.
4. Compact Design
The 226A’s compact size allows it to maneuver easily in confined spaces, making it a go-to machine for urban construction projects or landscaping tasks. With a width of just over 5 feet, it can navigate through narrow pathways and tight areas that larger machines can’t access.
Common Issues and Troubleshooting
Despite its solid design and performance, the CAT 226A, like any machine, can encounter issues during operation. Recognizing these problems early can prevent further damage and costly repairs. Some of the most common issues and troubleshooting tips are listed below:
1. Hydraulic System Problems
One of the most frequently reported issues is problems with the hydraulic system, which can lead to slow or unresponsive operation of attachments or loader functions.

• Cause: Low hydraulic fluid levels, clogged filters, or malfunctioning hydraulic pumps.
  
• Solution: Always ensure that the hydraulic fluid is at the proper level and that the hydraulic filters are clean. Regularly inspect hoses and fittings for leaks or damage. If the hydraulic pump is malfunctioning, it might need to be repaired or replaced.
  

• Cause: Insufficient cooling, blocked radiators, or low coolant levels.
  
• Solution: Check the coolant levels regularly and ensure that the radiator is free from debris. If the engine continues to overheat despite these measures, it may be necessary to inspect the cooling system, including the thermostat and water pump.
  

• Cause: Dead battery, faulty alternator, or wiring issues.
  
• Solution: If the machine fails to start, check the battery and charging system. Make sure that the battery terminals are clean and securely connected. If the battery is not the issue, inspect the alternator and wiring for damage or wear.
  

• Cause: Overuse, poor maintenance, or lack of lubrication.
  
• Solution: Regularly check the condition of the drive motors and lubrication points. If the motors are making unusual noises or experiencing a decrease in power, they may need to be repaired or replaced.
  

• Cause: Worn-out pins, bushings, or hydraulic cylinders.
  
• Solution: Regularly inspect the bucket and linkage for signs of wear. Replace any worn parts and ensure that the hydraulic system is functioning properly.
  

The Clark 666C and Its Legacy in Timber Work
The Clark 666C skidder is a rugged, purpose-built forestry machine designed for log skidding and heavy-duty terrain navigation. Manufactured by Clark Equipment Company, which began producing industrial machinery in the early 20th century, the 666C was part of a lineage that emphasized mechanical simplicity and brute strength. With thousands of units deployed across North America, Australia, and New Zealand, the 666C became a staple in timber operations, often powered by the Detroit Diesel 4-53 two-stroke engine.
This engine, known for its distinctive sound and high-revving nature, delivers reliable torque in steep and muddy conditions. However, like many older machines, the 666C is prone to age-related issues—coolant leaks being one of the more elusive and frustrating problems.
Terminology Note

• Coolant Overflow Tube: A relief pathway that allows excess coolant or pressure to escape from the radiator cap.
  
• Head Gasket: A seal between the engine block and cylinder head, critical for maintaining compression and preventing fluid mixing.
  
• Radiator Cap Pressure Rating: The threshold at which the cap allows coolant to escape, typically measured in psi or kPa.
  
• Thermal Expansion: The increase in coolant volume as temperature rises, which can trigger overflow if not properly regulated.
  

• Replacing the radiator cap with a properly rated unit (typically 7–13 psi depending on system design)
  
• Verifying the fan direction—pulling air through the radiator is generally more effective for cooling
  
• Installing a coolant recovery tank to capture overflow and prevent loss
  

• Monitoring coolant levels daily
  
• Using high-quality antifreeze with corrosion inhibitors
  
• Avoiding sudden shutdowns after hard pulls to prevent thermal shock
  

• Inspect the radiator cap for wear, corrosion, or missing seals
  
• Check hoses and clamps for signs of bulging or seepage
  
• Clean the radiator fins monthly to ensure airflow
  
• Use infrared thermometers to monitor engine and radiator surface temperatures
  
• Keep a log of leak occurrences, terrain, and load conditions
  

The Culture of Earthmoving Machines
Heavy equipment isn’t just about horsepower and hydraulics—it’s a culture. From the roar of a D11 dozer pushing through shale to the precision of a long-reach excavator trenching beside a live pipeline, these machines represent more than tools. They embody grit, engineering, and the stories of the operators behind the levers. Across North America, Australia, and Asia, crews share footage and tales of their biggest, baddest machines in action—digging, ditching, and sometimes dealing with the unexpected.
Terminology Note

• Mass Excavation: Large-scale earthmoving typically involving high-capacity machines.
  
• Long Reach Excavator: A machine with extended boom and stick for deep trenching or demolition.
  
• Push-Pull Scraper: A tandem earthmoving setup where two scrapers assist each other during loading.
  
• Slope Dozing: Grading terrain at an angle, often requiring blade tilt and track coordination.
  

• Caterpillar 657G push-pull scrapers moving 50+ cubic yards per cycle
  
• Komatsu PC1250 excavators trenching through granite
  
• Volvo EC950F loading 100-ton haul trucks in open-pit mines
  
• Hitachi EX1200s working in Australian coal fields
  

• Collapsing trench walls in sandy soils
  
• Utility strikes due to inaccurate maps
  
• Hydraulic overheating during deep cuts
  
• Bucket wear from abrasive subgrades
  

• Time-lapse footage of mass excavation
  
• Drone shots of coordinated dozer grading
  
• POV cab views during trenching
  
• Night work under floodlights
  

• Daily greasing of pivot points and bucket pins
  
• Hydraulic fluid sampling every 500 hours
  
• Undercarriage inspection weekly
  
• Engine diagnostics via telematics
  

• Record and review footage for training and performance analysis
  
• Use GPS and grade control systems to reduce rework
  
• Maintain a video archive for marketing and client presentations
  
• Monitor wear patterns and adjust operator technique accordingly
  
• Celebrate operator achievements to build morale and retention
  

Kobelco, a well-established manufacturer of construction equipment, is known for its innovative approach in creating high-performance machines. The Kobelco SK120 LC, a mid-range hydraulic excavator, is one such model that has earned its place in the industry. However, like all machinery, it can encounter issues over time, especially with components such as the step motor. In this article, we will delve into the role of the step motor in the Kobelco SK120 LC, the common issues associated with it, and solutions to keep this vital component running smoothly.
Understanding the Step Motor in Kobelco SK120 LC
The step motor in the Kobelco SK120 LC is a key component of the machine's control system. It is part of the actuator system that controls the movement of various hydraulic functions, such as boom movements, arm extensions, and bucket actions. The step motor receives electrical signals from the control system and converts them into precise mechanical movements that allow the excavator to perform its operations smoothly and efficiently.
Step motors are crucial for their high precision and the ability to handle specific movement commands. These motors operate in "steps," meaning they move incrementally, offering fine control over the equipment’s actions. This feature is especially valuable in tasks requiring delicate and precise movements, such as digging in confined spaces or performing grading tasks.
Common Issues with the Step Motor
While the step motor is designed for durability, it is not immune to issues, particularly in older models or in machines that have experienced heavy use. Here are some of the most common problems encountered with the Kobelco SK120 LC step motor:
1. Erratic or Unresponsive Movement
One of the most common symptoms of a failing step motor is erratic or unresponsive movement. This can manifest as the excavator's boom or arm jerking, moving too quickly, or failing to respond at all to input commands. This issue is usually a result of electrical problems or damage to the motor itself.

• Cause: This problem may be caused by wiring issues, damaged sensors, or a malfunctioning control module that is not sending the correct signals to the motor.
  
• Solution: Inspect the wiring and electrical connections for any signs of corrosion or wear. Additionally, check the motor’s sensor system and replace any faulty parts.
  

• Cause: Overheating can be caused by prolonged operation in hot conditions, overloading the motor, or a malfunction in the cooling system.
  
• Solution: Ensure that the step motor’s cooling system is working properly. If necessary, reduce the load on the motor or allow the machine to cool down during breaks. Regular cleaning of the motor and surrounding areas can also prevent heat buildup.
  

• Cause: This could be a sign of an issue with the motor’s internal components, such as worn-out brushes, gears, or bearings. Additionally, inconsistent power supply or control signal issues could be at fault.
  
• Solution: Perform a full inspection of the motor, focusing on internal components like the brushes and gears. Replacing worn parts or cleaning out the motor may restore consistent performance.
  

• Cause: Failure to start is often due to a damaged motor, a blown fuse, or an issue with the electrical system.
  
• Solution: Inspect the electrical system for any blown fuses or disconnected wires. If the motor itself is damaged, it will need to be replaced.
  

The Rise of Doosan in the Excavator Market
Doosan, originally a South Korean conglomerate founded in 1896, entered the construction equipment sector through its acquisition of Daewoo Heavy Industries in the early 2000s. This move positioned Doosan as a global player in the hydraulic excavator market. Over the past two decades, Doosan excavators have gained traction in North America, Europe, and Asia, with tens of thousands of units sold across various weight classes. Their machines are known for combining robust mechanical design with advanced hydraulic systems and operator-centric features.
Doosan’s excavator lineup ranges from compact models like the DX35Z to heavy-duty machines such as the DX530LC, covering applications from urban trenching to large-scale mining. The company’s emphasis on fuel efficiency, durability, and affordability has made it a competitive alternative to established brands like Caterpillar, Komatsu, and Volvo.
Terminology Note

• Hydraulic Excavator: A machine that uses pressurized fluid to power its boom, arm, and bucket for digging and lifting.
  
• Load-Sensing Hydraulics: A system that adjusts flow and pressure based on operator input and load demand.
  
• Auto Idle: A feature that reduces engine RPM when controls are inactive, saving fuel.
  
• SPC (Smart Power Control): Doosan’s proprietary system that balances hydraulic and engine power for optimal efficiency.
  

• Engine oil and filter: every 250 hours
  
• Hydraulic oil: every 500 hours
  
• Air filters: every 250 hours or sooner in dusty environments
  
• Track tension: weekly inspection
  

• Check battery terminals monthly
  
• Inspect wiring harnesses quarterly
  
• Replace fuses and relays as needed
  
• Use OEM diagnostic tools for fault code interpretation
  

• DX140LCR-5: Compact radius for urban work
  
• DX225LC-5: Mid-sized all-rounder
  
• DX350LC-7: Heavy-duty excavator with advanced telematics
  

• Use SPC-equipped models for fuel-sensitive operations
  
• Perform seasonal maintenance to prevent overheating or cold-start issues
  
• Monitor hydraulic fluid quality and replace filters proactively
  
• Train operators on fault code interpretation and basic diagnostics
  
• Compare lifecycle costs, not just purchase price, when evaluating fleet additions
  

Dredging is a vital activity in construction, mining, and environmental management, particularly for tasks like excavating underwater sediments, maintaining waterways, or gathering materials from riverbeds or harbors. Small dredges, in particular, are often used in these specialized operations due to their ability to access tight spaces and work in shallow or confined water environments. However, like any machinery, small dredges come with their own set of challenges. One such challenge is “crawling,” a term used to describe a problem where the dredge struggles to move properly, either in terms of propulsion or efficiency. This article explores the causes, challenges, and solutions related to small dredge crawling, with practical advice for improving dredge performance.
Understanding Small Dredges
Small dredges are typically used for light-to-moderate dredging work. These machines are smaller, more maneuverable, and capable of operating in shallow water or areas that are difficult for larger, more industrial dredges to access. They are commonly used in inland dredging, marinas, smaller harbors, or construction sites, particularly when dealing with mud, sand, silt, or light debris.
Small dredges typically have either a crawler or pontoon setup for mobility. The crawler dredges are mounted on tracks, which help them navigate underwater surfaces, while pontoon dredges float on the water's surface.
The dredge consists of several key components:

• Cutterhead: A rotating tool designed to loosen sediments.
  
• Pump system: Responsible for removing dredged material.
  
• Discharge pipeline: Directs the dredged material to a designated area.
  
• Crawler or pontoons: Provides movement, with crawlers enabling the dredge to move along the waterbed.
  

• Solution: Monitoring the sediment load and ensuring the dredge is not overburdened is crucial. It may be necessary to take periodic breaks to allow the dredge to discharge material or upgrade the pump system to handle larger volumes.
  

• Solution: Ensure that the pump is regularly maintained and cleaned. If the pump is struggling with debris or silt, use a pump with higher capacity or install a debris screen to prevent clogging.
  

• Solution: Regular maintenance of the crawler tracks is essential. Check for any signs of wear and tear and replace any damaged components. Additionally, ensuring the proper tension of the tracks and cleaning out sediment buildup from the tracks will improve mobility.
  

• Solution: Adjust the dredge's cutting head to match the type of material being dredged. Switching to a more aggressive cutting head can help break up the material more efficiently, making it easier to pump.
  

• Solution: Conduct regular checks of hydraulic fluid levels, ensure there are no leaks, and maintain the engine and hydraulic systems according to the manufacturer's specifications. Timely repairs are essential to avoid operational delays.
  

The Evolution of the D65 Series
The Komatsu D65E-6 is part of the long-standing D65 family of crawler dozers, a series that has earned global recognition for its balance of power, durability, and simplicity. Komatsu, founded in 1921 in Japan, began exporting dozers in the 1950s and quickly became a major competitor to Caterpillar in the heavy equipment market. The D65E-6, produced primarily in the late 1970s through the early 1990s, was designed as a mid-sized dozer for land clearing, grading, and construction support.
With an operating weight around 19,000 kg and a blade capacity of approximately 3.3 cubic meters, the D65E-6 was built to handle moderate earthmoving tasks with minimal electronic complexity. Its mechanical systems were favored by operators in remote regions where diagnostic tools and dealer support were limited.
Terminology Note

• Final Drive: The gear assembly that transmits torque from the transmission to the tracks.
  
• Torque Converter: A fluid coupling that allows the engine to spin somewhat independently of the transmission, improving low-speed control.
  
• Hydraulic Blade Lift: A system that uses pressurized fluid to raise and lower the dozer blade.
  
• Root Rake: A front-mounted attachment used to remove stumps and surface roots during land clearing.
  

• Leaking cylinder seals
  
• Contaminated hydraulic fluid
  
• Worn pump bearings
  

• Track links and bushings
  
• Carrier rollers and idlers
  
• Sprocket teeth
  

• Installing a block heater
  
• Upgrading to high-CCA batteries
  
• Replacing starter solenoids every 2,000 hours
  

• Perform oil and filter changes every 250 hours
  
• Grease all pivot points weekly
  
• Inspect track tension and alignment monthly
  
• Flush hydraulic system annually
  
• Keep a maintenance log to track wear and repairs
  

The TS14 Double Pan Scraper is a heavy-duty piece of construction equipment widely used for earthmoving tasks such as material hauling, grading, and leveling. Known for its efficiency and durability, the TS14 has become a staple in large-scale construction, mining, and agricultural operations. This article will dive deep into the mechanics of the TS14 double pan scraper, highlighting its design, functionality, and best practices for operation and maintenance.
What is a TS14 Double Pan Scraper?
A double pan scraper is a type of earth-moving equipment designed to transport large amounts of loose material over short distances. The TS14, in particular, is a versatile machine manufactured by Terex, a company with a history of producing reliable and rugged construction equipment. The "double pan" refers to the two large pans (or bowls) at the rear of the scraper, which scoop up, carry, and unload material.
This machine has a robust design, making it suitable for tough construction jobs like road building, landfill management, and mining operations. It offers greater capacity than single-pan scrapers, making it highly efficient for large-scale projects.
Key Features of the TS14 Double Pan Scraper
The TS14 is designed with several distinctive features that enhance its performance and make it suitable for heavy-duty work:
1. Double Pan Design
The most prominent feature of the TS14 is its double pan setup. This design allows the scraper to carry larger volumes of material, making it ideal for jobs that require the movement of large quantities of earth or aggregate. Each pan has its own hydraulic system, enabling better control over the material being hauled and improved maneuverability.
2. Heavy-Duty Construction
The TS14 is built for durability, with a reinforced steel frame and high-strength materials capable of withstanding the stresses and wear that come with heavy use in rugged environments. This sturdy construction is essential for maximizing the lifespan of the machine, especially in tough soil conditions or harsh weather.
3. High Capacity
With the ability to haul large amounts of material in a single pass, the TS14 offers excellent productivity for projects that involve large volumes of earth-moving, such as grading or construction of roads, embankments, and levees.
4. Efficient Hydraulic System
The hydraulic system on the TS14 is designed for efficiency and control. The dual pans can be raised and lowered independently, allowing operators to manage load distribution and dumping with great precision. This system ensures that material is spread evenly and accurately, preventing spills and reducing wastage.
5. Operator Comfort
Despite being a machine meant for heavy-duty tasks, the TS14 incorporates ergonomic features that improve operator comfort. The operator’s cab is designed for optimal visibility and ease of control, helping to reduce fatigue during long working hours. The controls are user-friendly, offering smooth and responsive handling.
How the TS14 Double Pan Scraper Works
The basic operation of a double pan scraper like the TS14 can be broken down into several stages:

1. Loading: The scraper moves forward over the material, and the two pans are lowered into the earth. The hydraulic arms lift the pans to scoop the material into the bowl. In some models, the pans have a "cutting edge" that allows them to dig into compacted material.
   
2. Hauling: Once the pans are filled, the machine’s hydraulics lift them up to transport the material. The double pan design allows for larger material volumes, which results in fewer trips for the operator.
   
3. Dumping: Upon reaching the desired location, the operator raises the pans and dumps the load by tilting the bowls. The hydraulics are responsible for both lifting and dumping, ensuring that the material is evenly spread over the target area.
   
4. Returning: After dumping the load, the scraper returns to the loading area to repeat the cycle, continually moving material efficiently over the worksite.
   

• Solution: Regular maintenance and inspection of the hydraulic system, including checking fluid levels and pressure, are essential to avoid failures.
  

• Solution: Replace the cutting edges regularly to ensure optimal scraping and loading performance.
  

• Solution: Ensure that the engine is serviced regularly, with oil changes, air filter replacements, and fuel system maintenance performed according to the manufacturer’s recommendations.
  

• Solution: Regularly inspect tires for wear and replace them as needed. Keeping tire pressure at the recommended levels will also help extend their lifespan.
  

• Routine Inspections: Regularly check hydraulic systems, cutting edges, tires, and the engine to ensure everything is functioning properly.
  
• Lubrication: Keep all moving parts well-lubricated to prevent unnecessary friction and wear.
  
• Clean the Pans: After every use, clean the pans to prevent material buildup, which can affect performance.
  
• Monitor Fuel Consumption: Pay attention to fuel efficiency. Increased fuel consumption can indicate an underlying issue with the engine or hydraulics.
  

The Undercarriage as a Wear-Critical System
In tracked heavy equipment—dozers, excavators, and compact track loaders—the undercarriage is often the most expensive system to maintain. It bears the full weight of the machine, absorbs shock loads, and operates in abrasive environments. Historically, undercarriages relied on hardened steel components with manual tensioning and open lubrication systems. But recent innovations have transformed this subsystem into a smarter, more durable, and more efficient platform.
Terminology Note

• Track Chain: The assembly of links, pins, and bushings that forms the continuous track.
  
• Bogie System: A suspension mechanism that allows track rollers to pivot and absorb terrain shocks.
  
• SC2 Coating: A specialized surface treatment that increases wear resistance on bushings.
  
• TrackCare: A digital monitoring system for undercarriage wear and performance.
  

• Choose undercarriage configurations based on material type and terrain
  
• Use digital monitoring tools to track wear and schedule maintenance
  
• Partner with OEMs or dealers for proactive inspections
  
• Invest in sealed and coated components for high-abrasion environments
  
• Avoid reactive repairs by implementing predictive diagnostics
  

Denso injectors are vital components in modern diesel engines, playing a crucial role in delivering fuel into the combustion chamber efficiently. These injectors are known for their precision and reliability, which are essential for optimizing engine performance, fuel efficiency, and reducing emissions.
This article will explore the role of Denso injectors, how they work, common issues associated with them, and maintenance tips to ensure their longevity and performance.
What Are Denso Injectors?
Denso is a leading manufacturer of high-quality diesel fuel injectors. The company has been at the forefront of developing fuel injection systems that enhance engine performance, reduce fuel consumption, and minimize harmful emissions. Denso injectors are commonly used in various heavy machinery, trucks, and automotive engines.
Injectors are responsible for spraying fuel into the combustion chamber of an engine, and the precise delivery of fuel is vital for ensuring efficient combustion. Denso injectors are designed to optimize fuel flow, reduce particulate emissions, and improve the overall efficiency of the engine.
The Functionality of Denso Diesel Injectors
Denso injectors are part of a system known as the fuel injection system, which is integral to diesel engine performance. Their primary function is to atomize fuel into tiny droplets before introducing it into the combustion chamber. This process ensures that the fuel mixes effectively with air for combustion, leading to efficient engine operation. The key features of Denso injectors include:
1. Precise Fuel Delivery
The injectors regulate the exact amount of fuel that is injected into the cylinder at the right time, ensuring optimal combustion. This improves fuel efficiency and reduces exhaust emissions.
2. Pressure Control
Diesel engines operate under high-pressure conditions, and Denso injectors are designed to handle these high pressures. The injectors can spray fuel at precise pressures, helping the engine achieve better fuel atomization and combustion.
3. Multiple Injection Events
Many modern diesel engines rely on multiple injection events per combustion cycle. This helps to refine the combustion process by making the fuel-air mixture more uniform, which contributes to lower emissions and better performance.
4. Durability and Resistance to Wear
Denso injectors are built to withstand the harsh conditions of high-temperature and high-pressure environments. The materials used in Denso injectors are resistant to wear and corrosion, ensuring a long service life.
Common Problems with Denso Injectors
While Denso injectors are highly reliable, they can still experience problems over time due to various factors such as poor fuel quality, lack of maintenance, and natural wear and tear. Some common issues include:
1. Clogging and Blockages
Over time, injectors can become clogged with carbon deposits or debris from the fuel. This can lead to reduced fuel flow and inefficient combustion. Symptoms of clogging include rough engine idle, misfires, and reduced power output.

• Solution: Regular maintenance and using high-quality fuel can help prevent clogging. Cleaning or replacing injectors when necessary is essential.
  

• Solution: If leaks are detected, it is important to replace the faulty injectors and seals promptly to prevent damage to other engine components.
  

• Solution: Regular inspection and maintenance of the fuel system, including the fuel pump, fuel lines, and injectors, can help maintain consistent fuel pressure.
  

• Solution: Regularly monitor injector performance and replace them when their performance begins to degrade. Many modern engines have diagnostic systems that can help identify injector wear.