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FS 400 LV

by Blades Admin

FS 400 LV: Complete Guide to the Husqvarna FS 400 LV Walk-Behind Concrete Saw

The FS 400 LV is a professional walk-behind concrete saw trusted by contractors, municipalities, and maintenance crews for precise, repeatable cutting in concrete and asphalt. Compact yet powerful, the FS 400 LV is designed for surface-cutting applications where control, balance, and consistency matter more than extreme cutting depth. Its design allows operators to achieve straight, clean cuts with minimal effort, even during long or repetitive jobs.

Manufactured by Husqvarna, the FS 400 LV reflects decades of experience in concrete cutting equipment. It has become a staple on jobsites that require accuracy, durability, and dependable performance day after day.

What Is the FS 400 LV?

The FS 400 LV is a walk-behind floor saw engineered for horizontal cutting on flat surfaces. It bridges the gap between handheld cutoff saws and large road saws by offering professional cutting capability in a compact, easy-to-maneuver platform. Rather than focusing on maximum depth, the FS 400 LV emphasizes straight-line tracking, smooth operation, and operator control.

Typical applications include:

  • Concrete slab and floor cutting

  • Expansion and control joint cutting

  • Sidewalk, curb, and driveway work

  • Asphalt and pavement repair

  • Utility and maintenance access cuts

Its manageable size makes it ideal for confined spaces while still delivering the performance expected from professional equipment.

Design Philosophy and Build Quality

Balanced Chassis for Accurate Cutting

One of the defining features of the FS 400 LV is its balanced chassis. Weight is distributed evenly over the blade, allowing the saw to track straight with minimal correction. This balance reduces blade wander and helps maintain consistent cut lines over long distances, which is especially important for expansion joints and patch boundaries.

Built for Jobsite Durability

Concrete and asphalt cutting environments are abrasive and demanding. The FS 400 LV is built with a rugged frame, reinforced blade guard, and durable components designed to withstand slurry, dust, vibration, and frequent transport. This construction makes it suitable for both daily professional use and long-term ownership.

Cutting Performance in Concrete

The FS 400 LV is widely used for cutting cured and reinforced concrete in:

  • Residential slabs

  • Commercial floors

  • Warehouses and garages

  • Sidewalk panels

When paired with the correct concrete diamond blade, the saw delivers clean edges and consistent depth across different concrete mixes and aggregate types. Its stability allows operators to maintain uniform cuts even on slightly uneven surfaces.

Cutting Performance in Asphalt

Asphalt is highly abrasive and requires stable blade control to achieve clean results. The FS 400 LV performs exceptionally well in:

  • Road and pavement repair

  • Parking lot maintenance

  • Driveway cutting

  • Patch and trench preparation

Using an asphalt-specific diamond blade helps maximize cutting speed while extending blade life and reducing heat buildup.

Blade Size Compatibility

The FS 400 LV supports a range of diamond blade sizes, giving contractors flexibility to match blade diameter to job requirements. Smaller blades are commonly used for shallow scoring and joint work, while larger blades allow deeper cuts for slab and pavement repair.

This versatility allows operators to handle a wide variety of cutting tasks without switching machines, making the FS 400 LV a practical all-around surface saw.

Precision Depth Control

Accurate depth control is essential in professional concrete cutting. The FS 400 LV features a smooth, responsive depth-adjustment system that allows operators to set and maintain consistent cutting depth throughout the job.

This precision:

  • Improves joint uniformity

  • Reduces rework

  • Enhances overall cut quality

Fine adjustments can be made easily, even while working on uneven surfaces.

Ergonomics and Operator Comfort

Smooth Handling and Low Vibration

The FS 400 LV is designed to minimize vibration transferred to the operator. Reduced vibration improves comfort during extended cutting sessions and helps maintain control and accuracy over long distances.

Ergonomic Handle Design

The handle layout provides a natural grip and steering position, allowing operators to guide the saw smoothly while maintaining proper posture. This reduces fatigue and improves productivity on longer jobs.

Integrated Wet Cutting System

The FS 400 LV is designed primarily for wet cutting, which is the preferred method for both concrete and asphalt.

Benefits of wet cutting include:

  • Effective dust suppression

  • Blade cooling

  • Extended diamond blade life

  • Cleaner, smoother cuts

The integrated water system ensures consistent water flow to the blade, helping control silica dust and improve overall jobsite safety.

Common Applications of the FS 400 LV

Expansion and Control Joints

One of the most common uses of the FS 400 LV is cutting expansion and control joints in concrete slabs. Its straight-line stability and precise depth control make it ideal for creating uniform joints that help manage cracking and slab movement.

Sidewalk and Curb Work

Municipal crews and contractors rely on the FS 400 LV for sidewalk and curb repair, where accuracy and clean edges are essential to maintain safe, professional results.

Pavement and Asphalt Repair

For light-to-medium pavement repair, the FS 400 LV delivers clean access cuts and well-defined patch boundaries without the bulk of larger road saws.

Utility and Maintenance Projects

Utility contractors use the FS 400 LV to create access points for pipes, conduits, and cables, particularly in areas where space is limited and precision is required.

Diamond Blade Selection for the FS 400 LV

Choosing the correct diamond blade is just as important as choosing the saw itself.

Concrete Diamond Blades

Concrete blades are designed for specific hardness levels and aggregate types. Matching the blade to the material being cut ensures smoother operation and longer blade life.

Asphalt Diamond Blades

Asphalt blades typically feature softer metal bonds and wider gullets to handle the abrasive nature of pavement. Using the correct blade helps prevent overheating and premature wear.

Blade Fit and Safety

Blades must match the saw’s specifications for diameter and arbor size and must be rated for the saw’s operating speed. Proper fit ensures safe operation and consistent cut quality.

Maintenance and Long-Term Reliability

Routine maintenance keeps the FS 400 LV operating at peak performance.

Typical maintenance tasks include:

  • Cleaning slurry and debris after use

  • Inspecting belts and bearings

  • Checking blade condition and alignment

  • Verifying water system flow

  • Inspecting fasteners, guards, and controls

With regular care, the FS 400 LV can provide many years of dependable professional service.

Safety Considerations

Concrete and asphalt cutting involve inherent risks, and proper safety practices are essential.

Operators should always use:

  • Eye and face protection

  • Hearing protection

  • Respiratory protection when required

  • Gloves with good grip

  • Steel-toe footwear

Ensuring blade guards and water systems are properly installed before operation is critical for safe use.

FS 400 LV vs Larger Floor Saws

The FS 400 LV excels in situations where:

  • Precision matters more than extreme depth

  • Space is limited

  • Portability is important

  • Jobs involve surface cutting rather than deep infrastructure work

For many contractors, it provides the ideal balance between performance and maneuverability.

Who Uses the FS 400 LV?

The FS 400 LV is commonly used by:

  • Concrete contractors

  • Asphalt repair crews

  • Municipal maintenance teams

  • Utility contractors

  • Property maintenance professionals

Its versatility makes it suitable for both specialized and general cutting tasks.

FAQs About FS 400 LV

What is the FS 400 LV used for?
It is used for cutting concrete and asphalt on flat surfaces such as slabs, sidewalks, and pavements.

Is the FS 400 LV a walk-behind saw?
Yes. It is a compact walk-behind floor saw designed for straight horizontal cuts.

Is FS 400 LV the same as FS 400?
In most cases, FS 400 refers to the FS 400 LV configuration commonly used in the field.

Can the FS 400 LV cut asphalt?
Yes. With an asphalt-specific diamond blade, it performs very well on pavement and asphalt.

Does the FS 400 LV support wet cutting?
Yes. It includes an integrated water system for dust control and blade cooling.

What types of projects is the FS 400 LV best for?
It is ideal for residential, light commercial, municipal, and maintenance projects.

Is the FS 400 LV easy to transport?
Yes. Its compact design allows easy loading, transport, and storage.

What blades can be used with the FS 400 LV?
It supports a wide range of concrete and asphalt diamond blades within its size specifications.

Is the FS 400 LV designed for professional use?
Yes. It is built specifically for professional contractors and demanding jobsites.

How accurate are cuts made with the FS 400 LV?
The saw offers excellent straight-line tracking and precise depth control.

How long does an FS 400 LV typically last?
With proper maintenance, it can deliver many years of reliable professional service.

Final Thoughts on FS 400 LV

The FS 400 LV has earned its reputation as a dependable, precision-focused walk-behind concrete saw. Its balanced construction, smooth handling, and versatility across concrete and asphalt applications make it a valuable tool for contractors who demand clean cuts, consistent depth, and long-term reliability. For surface-cutting jobs where control, accuracy, and efficiency matter most, the FS 400 LV continues to stand out as one of the most trusted choices on modern jobsites.



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