DRMCO 720A Grader Overview

[MikePhua]

The DRMCO 720A grader is a piece of heavy machinery designed for precise grading operations in construction and road maintenance. Known for its reliability and rugged design, the DRMCO 720A plays a crucial role in shaping and leveling earth to create smooth, stable surfaces for roads, highways, and other infrastructure projects. Graders like the DRMCO 720A are often found in applications where fine control of the ground level is necessary, such as road construction, grading for drainage, and even creating the right slopes for stormwater management.
Historical Context of DRMCO Graders
DRMCO (Delhi Road Machinery Company) was founded with the intent to manufacture high-quality road construction and maintenance equipment. Over the years, the company earned a reputation for producing durable machines that could withstand the tough conditions of heavy civil engineering projects. DRMCO's commitment to quality and innovation helped them carve out a niche in the global marketplace for road graders and other road machinery.
While DRMCO graders like the 720A aren’t as widely known as those from some of the more established global brands such as Caterpillar or Volvo, they are recognized for offering a cost-effective solution for contractors and municipalities in countries like India, where budget constraints often guide purchasing decisions. The 720A model, being part of DRMCO’s mid-range offering, strikes a balance between price and performance, making it a popular choice in both developing and established markets.
Key Features of the DRMCO 720A Grader
The DRMCO 720A grader is designed to deliver exceptional performance while maintaining ease of operation. Below are some of its key features:

1. Engine and Powertrain
   The 720A grader typically features a diesel engine that provides the necessary power for all grading functions. The engine’s horsepower, while modest compared to larger, more expensive graders, is generally sufficient to perform everyday tasks such as leveling soil, grading gravel, and clearing debris.
   • Horsepower: Around 150-180 hp
     
   • Engine Type: Diesel
     
   • Transmission: Manual or semi-automatic, with a range of gears to suit various terrain and grading tasks.
     
2. Hydraulic System
   One of the most important aspects of a grader is its hydraulic system. The DRMCO 720A uses a hydraulic system to control the blade’s angle, height, and tilt, giving operators full control over the precision of the grading work.
   • Hydraulic Controls: Simple, intuitive joystick or lever-based controls
     
   • Blade Control: Adjustable height and tilt
     
   • Pump Capacity: Generally around 100-150 liters per minute, providing ample flow to operate attachments like scarifiers or ripper blades.
     
3. Blade and Moldboard
   The moldboard is the primary tool for grading and shaping the earth. The DRMCO 720A’s blade is wide and heavy, designed to handle a variety of materials, from loose gravel to compacted earth. It is adjustable, allowing the operator to change the angle and depth of the cut.
   • Blade Width: 12-14 feet
     
   • Moldboard Tilt: Adjustable for slope grading
     
   • Cutting Edge: Designed for long-lasting durability and performance under tough conditions.
     
4. Cab and Operator Comfort
   Comfort and visibility are key in ensuring that operators can perform their work efficiently and safely. The DRMCO 720A typically comes equipped with an operator-friendly cab that includes adjustable seating, climate control, and ample visibility to monitor the blade and work area.
   • Cab Type: Enclosed, air-conditioned cabin
     
   • Visibility: 360-degree view for improved control and safety
     
   • Seating: Adjustable for operator comfort during long shifts.
     
5. Rear Ripper and Additional Attachments
   Many graders, including the DRMCO 720A, come equipped with rear rippers or scarifiers, which can break up hard surfaces like compacted earth or ice. These attachments increase the versatility of the grader, allowing it to handle more complex jobs.
   • Rear Ripper: Ideal for tough material like asphalt or frozen ground
     
   • Scarifier: Helps break up compacted soil for easier grading.
     

Applications of the DRMCO 720A Grader
The DRMCO 720A is typically used in the following applications:

1. Road Construction and Maintenance
   This grader is most commonly used in the construction of new roads or in the maintenance of existing roadways. Its precise control over the blade allows for the creation of smooth, even surfaces necessary for asphalt or concrete pavement.
   
2. Landscaping and Site Preparation
   In construction projects that involve extensive site preparation, such as building foundations or leveling out land for agricultural or industrial use, the DRMCO 720A provides the precision needed to move large amounts of earth efficiently.
   
3. Drainage and Slope Creation
   Graders are also essential in creating proper drainage systems for roadways and construction sites. The DRMCO 720A’s ability to adjust the blade’s angle makes it suitable for creating slopes that direct water away from the roadbed or building site.
   
4. Snow Removal
   Although more common in colder climates, graders are sometimes used for snow removal in areas where roadways are cleared of heavy snow accumulation. The 720A’s powerful blade and adjustable control make it useful for pushing snow to the sides of roads.
   

Troubleshooting Common Issues with the DRMCO 720A
Like any piece of machinery, the DRMCO 720A can experience some operational challenges over time. Common issues include:

1. Hydraulic System Failures
   Hydraulic failures, including leaks or loss of pressure, can significantly affect the grader’s ability to control the blade. Regular maintenance, including checking hydraulic fluid levels and replacing worn seals, is critical to prevent these issues.
   
2. Engine Overheating
   Overheating can occur if the cooling system is not functioning properly or if the engine is under excessive load. Operators should ensure that the radiator and cooling fans are regularly cleaned and checked for proper function.
   
3. Blade Control Issues
   If the blade is not responding as expected, it could be due to issues with the hydraulic system or the blade control linkage. Lubrication of moving parts and a check for hydraulic leaks can often resolve these problems.
   
4. Tire Wear
   Since the grader works on rough and uneven terrain, tire wear is inevitable. Ensuring that tires are properly inflated and rotated can extend their lifespan and maintain operational efficiency.
   

Maintenance and Longevity
Regular maintenance is essential to keeping the DRMCO 720A in top condition. Here are some key tips:

1. Hydraulic Fluid and Filters: Change the hydraulic fluid and replace filters at regular intervals to prevent contamination of the hydraulic system.
   
2. Tire Inspection: Check tire pressure regularly and inspect for signs of wear or damage. Ensure that the tires are appropriate for the worksite’s conditions.
   
3. Engine Maintenance: Regularly service the engine by checking fluid levels, changing oil, and cleaning air filters.
   
4. Blade Care: Inspect the blade for wear, cracks, or damage. Sharpen or replace the cutting edge when necessary to ensure optimal grading performance.
   

Conclusion
The DRMCO 720A grader is a versatile, reliable piece of machinery that plays a crucial role in construction and infrastructure projects. With its strong hydraulic system, adjustable blade, and variety of attachments, it is designed to tackle a range of grading tasks. Regular maintenance, proper operation, and timely repairs will ensure that the DRMCO 720A remains a valuable asset for any construction fleet. While it may not be as widely recognized as some of the larger global brands, it offers excellent value and performance for those who rely on it day-to-day.