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About FS400 LV Walk Behind Floor Saw Parts by Husqvarna
Husqvarna FS400 LV Floor Saw Parts — OEM Replacement for FS400 LV, FS400LV, FS 400 LV Walk-Behind Concrete Saws
The Husqvarna FS400 LV (also written as FS400LV, FS 400 LV, or the Husqvarna 400 floor saw) is one of the most widely used walk-behind concrete floor saws in the professional construction market. Its combination of a reliable Honda or Kohler engine, 14"–18" blade capacity, heavy-duty steel frame, and ergonomic push-handle design makes it the benchmark walk-behind saw for concrete cutting contractors, road crews, utility installers, and equipment rental fleets across North America.
Also called a push floor saw, concrete road saw, flat saw, slab saw, concrete cutting machine, or concrete saw on the job site — the FS400 LV delivers consistent depth and straight cuts on concrete, asphalt, and masonry. Keeping it running means having the right OEM parts on hand. DanseUSA has been an authorized Husqvarna dealer since 1981 and stocks genuine FS400 LV replacement parts with same-day shipping available.
FS400 LV — Key Specifications
- Engine: Honda GX390 or Kohler CH395 (depending on production year)
- Blade capacity: 14"–18" diamond blade
- Maximum cut depth: approximately 5.5" at 14" blade
- Water flow system: integrated water delivery for blade cooling and slurry control
- Frame: heavy-gauge steel with folding handles for compact transport
Most Commonly Replaced FS400 LV Parts
- Drive belt (12-groove PK belt, part 588768501) — the most commonly replaced mechanical part on the FS400 LV; worn belts slip under load and reduce blade speed. OEM part 588768501 replaces legacy number 543044964.
- Blade guard assembly — upper and lower blade guards protect the operator and contain concrete slurry; replace cracked guards immediately
- Blade arm assembly — the blade arm positions and supports the cutting blade; damaged or bent blade arms cause inaccurate depth control
- Height adjustment assembly — controls cutting depth; worn or seized adjustment mechanisms lead to inconsistent cut depth on long runs
- Blade shaft & blade shaft bearing — worn blade shaft bearings cause blade wobble, crooked cuts, and premature diamond blade wear
- Water delivery system (pump, hoses & nozzles) — blocked or damaged water supply to the blade causes overheating, blade damage, and airborne concrete dust
- Air filter & pre-filter (Honda GX390 / Kohler CH395) — concrete dust is highly abrasive; replace air filter every 25 hours during active concrete cutting
- Engine oil & spark plug (Honda GX390) — standard GX390 service parts for FS400 LV oil change and tune-up
- Frame assembly components — axle assemblies, wheel hardware, and structural frame parts for FS400 LV
- Handle assembly & handle hardware — folding handle tubes, hardware, and mounting brackets for FS400 LV
FS400 LV vs FS400 — Are They the Same?
Yes — the FS400 LV and FS400LV are the same machine; Husqvarna uses both spellings in their documentation. The "LV" designation stands for Low Vibration, referring to the vibration-dampened handle system that reduces operator fatigue on long concrete cutting runs. The older FS400 (without the LV suffix) is a different model with some interchangeable and some incompatible parts. Always confirm the exact model number on your machine's data plate before ordering.
Need to identify your FS400 LV part number? Email [email protected] with your model and serial. Authorized Husqvarna dealer since 1981. Same-day shipping on stocked parts.
Frequently Asked Questions
Match the Ref. # on the diagram to the row in the parts list at the right. Click a part name to see details, price, and add it to cart.
Confirm your model/series and serial number range on the product page. Many manufacturers have serial breaks, when in doubt, share your model and serial with us and we’ll verify fit.
The Ref. # points to the callout on the drawing. Qty shows how many of that item your machine uses. Parts are sold individually unless noted as a kit.
Yes, we supply genuine OEM parts for all our brands. If a part has an approved replacement, we ship the latest superseded revision
Manufacturers often supersede numbers. Our pages list the current orderable number and show older numbers in the description when available. Your old number will cross-reference to the correct part.
Yes. Some items are not pictured or are shared with other assemblies. Send us the model, serial, and a description (or photo) and we’ll locate it.
Yes. DanseUSA passes the manufacturer’s warranty to you. Coverage applies to defects in materials and workmanship under normal use for 30 days from the purchase date, in line with the manufacturer’s warranty policy. Terms can vary by brand; the product page reflects the applicable policy. If a claim is needed, we’ll help coordinate with the manufacturer.
Yes, most new, uninstalled items can be returned under our standard policy. Please see our Returns & Refunds Policy for eligibility, timeframes, and any exceptions.