Case 780B, 1987 Technical Specifications
| SideShift or CenterMount | CM |
| SAE dig depth (mm) | 6700 |
| Reach @ ground level (mm) | 8920 |
| Loading height (mm) | 4420 |
| Bucket width, min-max (mm) | 457-914 |
| Bucket breakout (kgf) | 5635 |
| Dipper breakout (kgf) | 4519 |
| Slew System | Cylinder |
| Loader Bucket Capacity (m3) | 1.34 |
| Dump height (mm) | 3510 |
| Bucket width (mm) | 2440 |
| Bucket breakout (kgf) | 5560 |
| Engine Make & Model | Case A336BDT |
| Engine power (kW@rpm) | 83@2200 |
| Engine displacement (lit) | — |
| Number of cylinders | — |
| Pump type | Gear |
| Pump flow (lit/min) | 112 |
| Relief valve pressure (bar) | 137.9 |
| Transmission type | PS TC |
| Drive | 2WD |
| Speeds, FR | 33 |
| Maximum speed (km/h) | 32 |
| Ride control (Std/Opt/NA) | — |
| Travel length (mm) | 7520 |
| Travel height (mm) | 4010 |
| Width (mm) | 2440 |
| Turn circle radius without brakes (mm) | 12400 |
| Operating weight (kg) | 9114 |
| Model | 780B |
Introduction
The Case 780B is a backhoe loader designed to tackle a range of construction projects. It was introduced in 1987 with specific technical specifications that make it a competitive construction equipment model in the industry. This article analyses the advantages and disadvantages of several key features and specifications of the Case 780B.
SideShift or CenterMount
The 780B offers two attachment options: SideShift or CenterMount. The advantage of the SideShift is that it allows the user to move the attachment from side to side, making it easier to position the machine in tight spaces. Meanwhile, CenterMount is advantageous for greater stability when using heavier attachments.
Real-world examples of the usefulness of the SideShift feature could include its application in urban construction sites where physical space is limited and requires flexible movements. Conversely, CenterMount may be more useful when working on large construction sites with plenty of operating space.
SAE dig depth
The SAE (Society of Automotive Engineers) dig depth specification for the Case 780B is 6700mm. This feature is an advantage for larger excavation tasks as it allows for deeper digging without the need for additional equipment.
An example of the usefulness of this feature could be a construction project that requires the excavation of a deep foundation for a high-rise building.
Loader Bucket Capacity
The Case 780B’s Loader Bucket Capacity is 1.34m3, which is an advantage for handling large volumes of material, while minimizing the number of cycles needed to transfer excavated materials to dump trucks.
A real-life example of the usefulness of this feature could be in the construction of highways where large volumes of materials are removed from the side or center of the road.
Transmission type and Drive
The 780B has a transmission type called the PS TC (Powershift Transmission with Torque Converter) and a two-wheel-drive system. The PS TC offers variable gears that allow operators to smoothly shift gears without requiring the operator to control the clutch pedal. A two-wheel-drive system is an advantage for the 780B as it is an efficient system that requires less torque and power to drive the machine.
However, two-wheel-drive machines can pose challenges on slippery and soft soil/foundation types, especially in wet or muddy conditions.
An example of the usefulness of the Powershift system could be a project that is both rugged and requires conformity with the COVID-19 physical distancing measures. However, the disadvantage of a two-wheel- drive system is that it is unable to provide enough traction for certain applications.
Maximum speed
The maximum speed of the 780B is 32km/h, which is an advantage for fast-moving projects where the machine needs to be quickly moved from one location to another.
An example of a project where speed would be critical is road work on highways and other busy transportation infrastructure.
Travel length and height
The travel length and height of the Case 780B encourage accessibility and the ability to move quickly. With a height of 4010mm and a length of 7520mm, it offers advantages in tight construction sites by being able to move quickly and fit into the narrowest spaces.
An example of the usefulness of this feature could be on a residential construction site that has a restrictive space for the placement of machinery.
Operating weight
The operating weight of the 780B is 9114kg, which is an advantage as it provides a solid mass that creates stability during excavations and transports.
A real-life example of the usefulness of this feature could be construction work on a hilly, or sloping site, where the weight of the machine becomes necessary for stability.
Bucket Breakout and Dipper Breakout
The Bucket Breakout and Dipper Breakout are two specifications that measure the force needed to break or move objects with the machine. The 780B has a Bucket Breakout of 5635kgf and a Dipper Breakout of 4519kgf, which are both advantages as they provide enough force to break through tough soils and foundations.
An example of the usefulness of this feature could be excavation work that requires the removal of large rocks or boulders.
Slew System and Pump Type
The Slew System is Cylinder-based on the 780B with a pump type that is Gear. A cylinder-supported system has advantages as it requires less lubrication and lasts longer than its hydraulic counterparts, such as piston cylinders. A gear pump has an advantage as it is efficient while providing enough pressure to operate other functions. A notable disadvantage of the gear pump is its noisiness and relative speed.
An example of the usefulness of this feature could be excavation work where the cylinder-supported system is beneficial in reducing maintenance and operating cost, appropriately lubricated, and avoiding hydraulic system breakdowns.
Overall Assessment
In conclusion, the Case 780B offers specific advantages and disadvantages based on the architectural or construction needs. In terms of advantages, the 780B stands out with its SAE dig depth, Loader Bucket Capacity, Bucket Breakout, Dipper Breakout, Maximum Speed, Transmission type, and Drive. On the other hand, these same advantages may not be enough to overcome the disadvantages for certain projects, such as the limitations of a two-wheel-drive system with a slippery and soft soil/foundation. The usefulness of the 780B is premised on the construction site’s environmental conditions and the project’s size, as well as the construction objectives.
