Question 1

What engine powers the 2008 Somero S-840 Laser Screed and what is its fuel capacity?

Accepted Answer

The 2008 Somero S-840 Laser Screed is equipped with a 20.5 horsepower air-cooled gasoline engine. Models have featured either a Subaru EH65 or Robin America EH64 2-cylinder engine. The fuel capacity is 4.25 gallons, which provides several hours of operation depending on workload. Some later models offer an optional diesel engine (24.8 HP Kubota DH902) for extended runtime and fuel efficiency.

Question 2

What are the dimensions and weight of the S-840?

Accepted Answer

The 2008 Somero S-840 Laser Screed measures approximately 3 feet 6 inches wide in transport mode, 9 feet 7 inches long with standard screed head, and weighs 1,548 lbs. These compact dimensions allow the machine to fit through standard doorways and access tight job sites while being easily transported on a flatbed truck or tag-behind trailer.

Question 3

What screed head widths are available?

Accepted Answer

The 2008 Somero S-840 Laser Screed offers three interchangeable head options: Screed Head in 6-foot or 8-foot width with offset auger design, Raking Head in 6-foot or 8-foot width for spreading and leveling, and Sub-Grade Head for fine grading of sub-base material. The offset auger design on the screed head allows for one-person operation without requiring additional rakers.

Question 4

What is the production rate of the 2008 Somero S-840 Laser Screed?

Accepted Answer

The 2008 Somero S-840 Laser Screed can screed up to 5,000 square feet per hour on average. Actual production rates depend on factors such as concrete slump, slab thickness, site conditions, operator experience, and whether you're working on ground level or elevated decks.

Question 5

What concrete slump range can the 2008 Somero S-840 Laser Screed handle?

Accepted Answer

The machine works effectively with concrete slumps as low as 3.5 inches, making it versatile for various concrete mixes. This low-slump capability is particularly valuable for industrial floors and warehouse applications where stiffer concrete is often specified for durability and flatness.

Question 6

What flatness can I expect to achieve with the 2008 Somero S-840 Laser Screed?

Accepted Answer

The 2008 Somero S-840 Laser Screed is designed to exceed standard flatness and levelness specifications. With its integrated laser control system, the machine automatically maintains grade to achieve superior FF (Floor Flatness) and FL (Floor Levelness) numbers compared to manual screeding methods. The exact numbers depend on concrete quality, placement conditions, and operator skill.

Question 7

What types of projects is the S-840 best suited for?

Accepted Answer

The S-840 excels at commercial warehouse floors, industrial slabs-on-grade, retail space concrete floors, parking structures, loading docks and service areas, and projects requiring high flatness specifications. It's particularly effective for contractors working on small to medium-sized pours where a larger screed would be impractical.

Question 8

Can the S-840 screed over rebar and heat tubes?

Accepted Answer

Yes. The auger screed head can work over chaired mesh reinforcement, chaired rebar, radiant heat tubes, and some slab-on-deck applications. The machine's hydraulic system controls the elevation of the auger to maintain grade even when working over obstacles, providing a smoother surface than rigid-mounting machines.

Question 9

Is the S-840 compatible with 3D profiling systems?

Accepted Answer

Yes, the S-840 is fully compatible with Somero's 3-D Profiler System. This allows the machine to create complex multi-slope surfaces for parking lots, loading docks, and outdoor paving applications using robotic total station technology for precise grade control.

Question 10

How many operators are required to run the S-840?

Accepted Answer

The S-840 is designed for single-operator use. The offset auger head design eliminates the need for additional personnel to manually rake concrete behind the screed. This significantly reduces labor costs compared to traditional screeding methods, which typically require multiple workers.

Question 11

What tire options are available and why do they matter?

Accepted Answer

The S-840 offers two tire configurations: Standard tires with 38 PSI ground contact pressure and optional ATV-style wide flotation tires with 9.8 PSI ground contact pressure. The low-pressure ATV tires are ideal for working on softer sub-grades or when you need to minimize ground disturbance. They also provide better traction in wet concrete.

Question 12

What routine maintenance does the S-840 require?

Accepted Answer

Regular maintenance includes daily checks of engine oil, fuel level, hydraulic fluid, and tire pressure. Weekly tasks include cleaning the air filter and inspecting the screed head for wear. Every 50 hours requires changing engine oil and filter. Every 100 hours includes lubricating all grease points and inspecting hydraulic hoses. Annual maintenance includes complete hydraulic system service and laser calibration check. The OASIS control system includes live calibration features that help maintain consistent performance between service intervals.

Question 13

What trailer or truck is needed to transport the S-840?

Accepted Answer

At 1,548 lbs and compact dimensions (3'6 inch wide x 9'7 inch long), the S-840 can be transported on a standard flatbed truck, tag-behind equipment trailer, or enclosed trailer for weather protection. Many contractors use a dedicated equipment trailer that allows for easy loading and unloading via ramps. No special hauling permits are typically required due to the machine's weight and size.

Question 14

Does the S-840 require special setup or calibration on-site?

Accepted Answer

2008 Somero S-840 Laser Screed  Setup is straightforward: Position laser transmitter at appropriate location, power on the OASIS control system, perform quick grade set calibration using Somero Quick GradeSet System, verify laser receiver response, and begin screeding. The system includes live calibration features that allow for adjustments during operation. Somero provides on-site training with machine purchase to ensure operators understand proper setup procedures.

Question 15

What are the main limitations of the S-840 compared to larger models?

Accepted Answer

While highly capable, the 2008 Somero S-840 Laser Screed has some limitations: Maximum 8-foot screed width means more passes on wide pours compared to larger models. Production rate of 5,000 sq ft/hr is excellent for its class but slower than boom screeds. Engine power of 20.5 HP is adequate for most applications but may struggle with very stiff concrete or thick lifts. It's optimized for slab-on-grade applications, and while it can handle some elevated work, larger equipment like the S-22E or S-940 may be better for projects where the S-840 would be overkill or unable to access the site.

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