The NTA-855 is a powerful engine developed by Cummins that has been widely used in various heavy machinery, including construction equipment, trucks, and marine applications. Like any other engine, the NTA-855 can experience issues related to its components, and one of the more common problems is a leaking front crankshaft seal. This seal plays a critical role in preventing engine oil from leaking out where the crankshaft passes through the engine block, and failure to address a leaking seal promptly can result in serious engine damage. Replacing the front crankshaft seal is a necessary repair for maintaining engine integrity and avoiding costly damage to other parts.

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Modern skidders like the John Deere 648H rely heavily on electronic control systems to manage transmission behavior, safety interlocks, and machine diagnostics. When a fault code appears on the display—especially one that references the transmission control unit (TCU)—operators often find themselves uncertain about the meaning of the message or the severity of the issue.

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The Peterbilt 335 and 337 series represent a class of medium‑duty vocational trucks widely used as service, mechanic, and utility trucks in construction, field maintenance, and industrial applications. Built by Peterbilt Motors Company, a respected U.S. truck manufacturer with roots stretching back to the 1930s, these models offer a blend of durability, torque capacity, and customization potential that make them ideal platforms for crane‑equipped service bodies, tool storage, and on‑site repairs. The 337 replaced the 335 as Peterbilt’s mid‑range model, with improvements in visibility, cab design, and powertrain flexibility. Professionals seeking a service truck chassis often pair these trucks with aftermarket service beds and cranes to create mobile workshops capable of handling heavy‑duty tasks in remote and urban environments alike.

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The Caterpillar D7H Series II is a powerful and respected dozer, widely used in earthmoving, forestry, and mining operations. Its steering and braking systems rely on a complex hydraulic network that must maintain precise pressures to ensure safe and responsive operation. When a machine undergoes major repairs—such as transmission rebuilds, torque converter replacement, or steering clutch overhauls—technicians often perform a full pressure‑testing procedure to verify that the hydraulic system is functioning within specification.

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The Caterpillar 319D hydraulic excavator is a mid‑sized machine widely used in construction, earthmoving, utilities, and landscaping. Its reliable Cat C4.4 diesel engine, advanced electro‑hydraulic controls, and robust undercarriage make it a favorite with contractors who need a balance of power and portability. However, a recurring issue many operators encounter is throttle drop‑out—a sudden reduction in engine speed or loss of throttle response during operation. This problem can severely affect productivity, safety, and fuel economy. Understanding why throttle drop‑out occurs, the key systems involved, and how technicians diagnose and repair it is crucial for maintaining performance and avoiding unnecessary downtime.

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Among the many unusual machines that appeared during the mechanization of forestry work, few are as distinctive as the International TC‑5 skidder. With its rubber‑tired track system, compact crawler‑like stance, and unconventional engineering, the TC‑5 represents a fascinating chapter in the evolution of logging equipment. Although rare today, the machine still sparks curiosity whenever one appears at a show or on a trailer—often prompting questions about its origin, purpose, and performance.

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The Liebherr 902 excavator from the mid‑1980s represents a generation of European-built machines known for their robust hydraulic systems and long service life. Many of these machines remain in private yards, farms, and small construction fleets, often still capable of productive work despite their age. However, when a machine sits unused for years or suffers a hydraulic failure, issues such as uneven track speed can appear.

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Acquiring a Caterpillar 955L track loader—especially a used or “new to me” unit—is a milestone for any equipment enthusiast or small contractor. The 955L is part of Caterpillar’s storied line of Caterpillar track loaders, bridging the gap between compact loaders and full‑sized dozers. Known for robust construction, impressive traction, and versatile performance, these machines have served across logging, site cleanup, excavation support, and general material handling for decades. This article explores not only buying and owning a used 955L but also its technical context, common maintenance themes, terminology, and real‑world anecdotes that bring the machine’s reputation to life.

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Hydraulic oil selection is one of the most important maintenance decisions for any backhoe loader, especially for machines like the JCB 214 Series 2, which rely heavily on smooth hydraulic performance for digging, lifting, and steering. Using the correct oil grade ensures proper lubrication, stable hydraulic pressure, and long component life. A simple question about which oil to use opens the door to a deeper understanding of viscosity grades, climate considerations, and real‑world experiences from operators who maintain these machines daily.

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Blade tip angle is one of the most important factors that determines how effectively a snow plow moves snow, how much fuel it consumes, how hard the machine works, and how clean the surface ends up. Whether operators are using a grader, loader, skid steer, or pickup‑mounted plow, controlling the tip angle allows snow to roll off the blade or cut through wind‑blown drifts efficiently. Incorrect blade orientation results in snow spilling back onto the cleared area, increased wear on the machine, and greater operator fatigue. This article explains snow plow tip angle fundamentals, terminology, real‑world adjustments for various conditions, common mistakes to avoid, and practical tips from experienced operators who have spent decades clearing snow in harsh climates.

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The Trojan 124A wheel loader is a product of an earlier generation of American heavy equipment—machines built with thick steel, simple hydraulics, and straightforward electrical systems. Many of these loaders remain scattered across farms, ranches, and small construction yards, often sitting unused for years before someone decides to bring them back to life. When that moment comes, one of the first challenges owners face is understanding the electrical system, especially when the machine has been dormant for half a decade or more.

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A mangled wheel stud—a wheel stud that has been rounded, twisted, bent, or stripped—is a common and frustrating problem in heavy equipment, trucks, and trailers. Wheel studs are the threaded fasteners that secure wheels to hubs. When these studs become damaged due to over‑tightening, corrosion, cross‑threading, impact tool misuse, or extended use without proper torque, the wheel can no longer be safely secured. Removing a mangled wheel stud can be challenging because the very shape of the stud is compromised. Without the right approach, hastily applied force can damage the hub, brake drum or rotor, and surrounding components. This article explains why studs fail, the tools and techniques professionals use to extract them, key terminology, and real‑world examples of successful removals.

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Wood chippers powered by small automotive‑derived engines—such as the Hyundai 1.6‑liter unit built under Zenith control—are known for their reliability, but they can also present unique diagnostic challenges. When a chipper begins flashing both rich and lean fault codes, operators often assume the oxygen sensor is failing. However, these symptoms can indicate a deeper issue involving the MAP sensor, vacuum integrity, fuel metering, or even the electronic control module’s interpretation of sensor data.

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The Yanmar B22 is a compact crawler tractor that has built a strong reputation among small‑scale farmers, landscapers, and construction operators for its reliability, versatility, and rugged design. Introduced as part of Yanmar’s line of utility tractors, the B22 blends modest horsepower with excellent traction and low ground pressure, making it particularly suited for tight spaces, muddy terrains, and steep grades where larger tractors struggle. As a preferred machine for hillside vineyards, small forestry work, and general estate management, the B22 often comes up in discussions about used equipment purchase decisions. Understanding its strengths, common issues, key terminology, and real‑world use cases can help prospective buyers make an informed investment.

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Mini excavators in the 1.8‑ton class have become indispensable tools for homeowners, landscapers, small contractors, and rural property owners. Their compact size, low operating cost, and ability to perform precise work make them ideal for clearing vegetation, maintaining trails, digging trenches, and shaping land. When choosing between two respected brands—Volvo and Komatsu—the decision often comes down to subtle differences in performance, long‑term ownership considerations, and the realities of local markets.

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The Caterpillar D6B is a classic medium track-type tractor widely used in construction, forestry, and agricultural work during the mid-20th century. Renowned for its robust design and reliable performance, the D6B was an evolution of the earlier D6 models, featuring improvements in engine output, track systems, and operator control. Despite its durability, older units often experience steering challenges due to wear in hydraulic systems, linkages, and track components. Understanding these issues is crucial for operators and restorers aiming to maintain or restore functionality.

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The Mitsubishi MS180‑3 excavator is one of those machines that quietly served construction sites, utility projects, and small contractors for decades. Although Mitsubishi’s excavator line never reached the global dominance of brands like Caterpillar or Komatsu, many of their machines were rebadged, shared components with other manufacturers, or were sold under joint‑venture agreements. This history often creates confusion when owners attempt to source replacement parts—especially hydraulic hoses and fittings.

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The Hough International H‑70 is a classic heavy‑duty wheel loader from the mid‑20th century, widely respected among collectors and operators of vintage construction equipment. Built by Hough International, a brand once affiliated with International Harvester Company, the H‑70 belongs to a lineage of front‑end loaders commonly known as “Payloaders”—a term originally trademarked by Hough but later used generically for similar machines. The loader was designed for robust work on farms, quarries, yards, and job sites, and many examples built in the 1950s and 1960s remain in use or have been restored by enthusiasts decades later.

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A Caterpillar 325 excavator that suddenly loses all hydraulic functions—while the engine continues to run normally—presents a serious operational and diagnostic challenge. When a machine stops in the middle of digging, leaving the bucket suspended in the air and all controls unresponsive, the cause is almost always tied to the pilot system or the main pump drive. These failures can occur without warning and often leave operators stranded with a machine that appears to be running but cannot move, lift, or swing.

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When it comes to compact skid steer loaders, two of the most recognized brands in the industry are Bobcat and Caterpillar (CAT). The Bobcat S630 and CAT 246D are both excellent choices for various tasks such as landscaping, construction, and material handling. However, choosing between the two models can be difficult, especially since both machines offer distinct features and capabilities. In this article, we will explore the key differences and similarities between the Bobcat S630 and CAT 246D to help you make an informed decision.

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A Gehl DL-6H telehandler exhibited a dramatic failure when hydraulic oil sprayed from the axle breather upon releasing the parking brake. This symptom pointed to a breach in the internal seal system, allowing pressurized fluid to escape into the axle housing. Wet brake systems, which use hydraulic pressure to engage and disengage internal brake discs submerged in oil, are particularly vulnerable to seal degradation and component fatigue.

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The Ford 555C is a backhoe loader model that has earned its reputation as a reliable, durable piece of construction machinery. Introduced in the early 1980s, the 555C was designed to tackle a variety of tasks on construction sites, including digging, lifting, and loading. Over the years, many operators and equipment owners have shared experiences with this machine, detailing both its strengths and common issues. In this article, we will take a deep dive into the Ford 555C backhoe loader, examining its key features, typical problems, and maintenance tips to ensure optimal performance and longevity.

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The International TD25 is a heavy-duty crawler dozer introduced in the late 1970s, often compared to the Caterpillar D8K in terms of size and performance. With a ripper-equipped rear and a tilt blade, the TD25C variant offers robust earthmoving capabilities.

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Car haulers, or vehicle transport trailers, are specialized trailers designed for the transportation of vehicles from one location to another. They play an essential role in industries ranging from automotive sales and auctions to moving companies and logistics operations. These trailers are designed to carry multiple vehicles simultaneously, providing a cost-effective and efficient solution for transporting cars, trucks, and other vehicles across long distances.

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An International TD8E dozer, recently revived after sitting idle in a barn for 3–5 years, began exhibiting a puzzling transmission issue. The machine started and ran well, steering properly and shifting smoothly through all gears. However, after driving a short distance, it would begin to slow down, with the driveshaft visibly decelerating. The engine maintained full RPM and showed no signs of fuel starvation or surging, ruling out engine-related causes.

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JCB machinery is renowned for its robust performance and versatility, particularly in construction and agricultural applications. Among the various components that ensure smooth operation, the slew brake is one of the most critical for maintaining stability and control. The slew brake is responsible for controlling the rotation of the upper structure of the machine, whether it be an excavator, backhoe loader, or another type of tracked vehicle. However, when problems arise with the slew brake system, it can lead to significant operational issues, including poor control of the machine’s rotation, safety concerns, and potential for further mechanical damage.

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When undertaking large-scale excavation—such as removing 25,000 to 30,000 cubic yards of soil to deepen a ditch or create a pond—erosion control becomes more than a technical consideration; it’s a legal and environmental obligation. Even on private ranches with flat clay terrain, disturbed soil can migrate during rain events, clogging waterways, damaging vegetation, and violating state or federal regulations.

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A crack in the boom of a piece of heavy equipment, such as an excavator or crane, is a serious issue that can impact the machine’s safety, functionality, and longevity. The boom is one of the most critical structural components, responsible for supporting the lifting or digging loads, and any defect can compromise its structural integrity. Identifying and addressing cracks in the boom early on can prevent further damage, avoid costly repairs, and ensure the safety of both operators and the equipment.

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A Fiat-Allis HD11B dozer presented with an intermittent oil leak around the starter bendix area. This location—where the starter gear engages the flywheel—should not normally be exposed to engine oil. The leak raised questions about the internal configuration of the flywheel housing and whether the machine was designed with a wet flywheel housing or a dry housing. Understanding this distinction is critical to diagnosing the root cause.

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The Case 580C backhoe loader is a versatile and durable machine widely used in construction, excavation, and landscaping projects. One of the critical components that ensure the smooth operation of this machine is the power shuttle, which is responsible for transferring power from the engine to the wheels or tracks, allowing for efficient forward and reverse motion. Over time, however, the power shuttle can experience issues that may affect performance, and in some cases, require rebuilding. In this article, we’ll explore common power shuttle problems, the rebuild process, and troubleshooting tips to help operators maintain their Case 580C backhoe loader in optimal working condition.

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A technician in Colombia encountered confusion while attempting to calibrate the “throttle motor” on a Hitachi ZX200-3 excavator. Initially believing the machine had a mechanical throttle motor, he later realized that the ZX200-3 is equipped with an ISUZU 4HK1 engine using a Common Rail fuel injection system. This system does not use a traditional throttle motor; instead, engine speed is electronically controlled by the ECM (Engine Control Module) via signals from the operator’s dial or joystick.

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The Case 430 is a widely used skid steer loader known for its robust performance in various construction and agricultural tasks. However, like all machinery, it may occasionally encounter problems that can hinder its efficiency or even cause it to shut down unexpectedly. One such issue reported by operators is the sudden shutdown of the machine, which can be frustrating and lead to costly downtime if not addressed promptly. In this article, we will explore potential causes for the Case 430 shutting down, discuss diagnostic steps to identify the issue, and suggest solutions to get the machine back up and running.

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A Caterpillar D11 dozer was spotted with a peculiar exhaust arrangement—mounted high above the cab, resembling a large box or scrubber unit. This configuration deviates from standard factory designs and raised questions about its purpose. Upon closer inspection and discussion among field technicians, it was identified as a particulate filter system, likely installed to meet stringent clean air regulations in specific regions or job sites.

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The construction industry is a cornerstone of economic development, with companies of all sizes contributing to projects that range from residential buildings to large-scale infrastructure projects. Two such companies that have made their mark in the field are Bizzack Construction LLC and Elmo Greer & Sons LLC. Both companies have been recognized for their expertise, reliability, and commitment to delivering quality construction services. This article will explore the history, operations, and notable projects of these two companies, shedding light on their contributions to the construction industry.

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A field mechanic working for a large rental company found himself unable to access critical service information for Kobelco machines. Unlike other OEMs such as JLG, Genie, or Sullair—whose portals allow broader access—Kobelco restricts its dealer portal to authorized dealership personnel.

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