FS3500G Husqvarna Service Manual

The Husqvarna FS3500G is a professional-grade floor saw designed for heavy-duty concrete cutting applications. This service manual provides comprehensive information for maintenance, troubleshooting, and repair procedures. It covers the FS3500G's 4-stroke gasoline engine, cutting system, safety features, hydraulic components, electrical system, and routine service intervals. Below are key sections for safety, specifications, maintenance procedures, troubleshooting, and parts information.

1. Safety Information 2. Technical Specifications 3. Component Identification 4. Maintenance Schedule 5. Engine Service 6. Cutting System 7. Hydraulic System 8. Electrical System 9. Troubleshooting 10. Parts Diagrams 11. Warranty & Support

Safety Information

Critical safety warnings and precautions for operating and servicing the FS3500G floor saw.

Hazard	Precaution
Rotating Blade	Always wear cut-resistant gloves, safety glasses, and hearing protection. Ensure blade guard is properly installed.
Fuel & Fire	Refuel in well-ventilated area with engine off and cool. No smoking. Use approved fuel containers.
Hot Surfaces	Allow engine and exhaust to cool before performing maintenance. Do not touch muffler or cylinder.
Electrical Shock	Disconnect spark plug wire before servicing engine or electrical components.
Hydraulic Pressure	Relieve hydraulic pressure before disconnecting hoses or fittings. Wear safety goggles.
Carbon Monoxide	Operate only in well-ventilated areas. Never use indoors or in confined spaces.
Stability	Engage parking brake on slopes. Use wheel chocks when required.
Lifting	Use proper lifting equipment or two persons to move saw. Back injury risk.

Technical Specifications

Model: Husqvarna FS3500G
Engine Type: 4-stroke, air-cooled, single cylinder gasoline engine
Engine Displacement: 190 cc
Power Output: 5.5 HP at 3600 RPM
Fuel Tank Capacity: 3.5 liters (0.92 US gal)
Blade Diameter: 350 mm (14 inches) maximum
Cutting Depth: 127 mm (5 inches) maximum
Drive System: Hydraulic direct drive to blade
Water Connection: Standard 3/4" hose thread for dust suppression
Weight: 95 kg (209 lbs)
Dimensions (LxWxH): 1220 x 640 x 1050 mm

Component Identification

Key components: Engine, Blade Guard, Depth Adjustment Wheel, Throttle Control, Choke, Fuel Valve, Hydraulic Oil Tank, Water Inlet, Parking Brake Lever, Transport Wheels.

Front Handle: Contains throttle control and engine stop switch.
Blade Guard Assembly: Protects operator from debris and rotating blade.
Depth Adjustment: Manual wheel for precise cutting depth control.
Hydraulic System: Reservoir, pump, motor, and control valve.
Engine Compartment: Houses engine, air filter, spark plug, and fuel system.

WARNING! Familiarize yourself with all controls before operation.

Maintenance Schedule

Regular maintenance ensures optimal performance and longevity.

Interval	Service Task
Before Each Use	Check engine oil level, fuel level, blade condition, and tire pressure.
Every 8 Hours	Clean air filter, check for loose bolts/nuts, inspect water system.
Every 50 Hours	Change engine oil, check spark plug, clean fuel filter, inspect blade shaft.
Every 100 Hours	Change hydraulic oil and filter, check drive belt tension, lubricate pivot points.
Every 300 Hours	Clean fuel tank, check valve clearance, replace air filter element.
Annually	Replace spark plug, check all safety devices, comprehensive inspection.

Engine Service

Procedures for maintaining the 4-stroke gasoline engine.

Oil Change: Run engine to warm oil. Drain via plug under engine. Refill with SAE 10W-30 (0.6 liters).
Air Filter: Remove cover, clean foam pre-filter in soapy water, replace paper element if dirty.
Spark Plug: Gap: 0.7-0.8 mm. Replace with Champion RCJ-6Y or equivalent.
Fuel System: Clean sediment cup. Replace fuel filter every 100 hours.
Carburetor Adjustment: Idle speed: 1400 RPM. High speed: 3600 RPM (factory set).

CAUTION! Ensure engine is off and cool before servicing.

Cutting System

Maintenance of blade, spindle, and drive components.

Blade Installation: Use correct diamond blade for material. Ensure arrow on blade matches rotation direction.
Blade Shaft Bearing: Check for play every 50 hours. Replace if excessive.
Drive Belt: Adjust tension to 10 mm deflection at center of span.
Depth Adjustment: Lubricate screw thread monthly with light grease.
Blade Guard: Inspect for cracks or damage. Replace if compromised.

WARNING! Always disconnect spark plug before blade service.

Hydraulic System

Service procedures for hydraulic drive system.

Oil Type: Use ISO VG 46 hydraulic oil or equivalent.
Capacity: 4.5 liters (1.2 US gal).
Filter Change: Replace spin-on filter every 100 hours.
Pressure Check: System pressure: 150 bar (2175 psi).
Leak Inspection: Check hoses, fittings, and pump seals regularly.

CAUTION! Relieve pressure before opening system. Contamination can cause failure.

Electrical System

12V electrical system components and testing.

Component	Specification	Test Procedure
Spark Plug	Champion RCJ-6Y	Check for spark with tester
Ignition Coil	Primary: 0.5-1.0 Ω	Resistance check with multimeter
Stop Switch	Normally closed	Continuity test when pressed
Charging System	AC output	Check voltage at lighting coil

Tip: Keep electrical connections clean and dry.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Engine won't start	No fuel, bad spark, choke position	Check fuel valve, spark plug, use choke when cold.
Engine runs poorly	Dirty air/fuel filter, old fuel	Clean/replace filters, use fresh gasoline.
Loss of power	Clogged fuel line, bad compression	Clean fuel system, check cylinder compression.
Blade won't rotate	Hydraulic oil low, drive belt broken	Check oil level, inspect belt condition.
Excessive vibration	Worn blade, unbalanced blade, loose mount	Replace blade, tighten mounting bolts.
Hydraulic overheating	Low oil, clogged cooler, wrong oil	Check oil level and type, clean cooler fins.
Oil leakage	Worn seals, loose fittings, cracked hose	Identify source, replace seals/hoses as needed.

Parts Diagrams

Reference diagrams for engine assembly, hydraulic system, cutting head, and frame components. Diagrams include part numbers for ordering genuine Husqvarna replacement parts.

Engine Group: Cylinder, piston, crankshaft, carburetor parts.
Hydraulic Group: Pump, motor, valve, hoses, filter.
Cutting Group: Blade shaft, bearings, guard, depth mechanism.
Frame Group: Handle, wheels, frame, covers.

Note: Always use Husqvarna genuine parts for warranty compliance.

Warranty & Support

Husqvarna FS3500G comes with a 12-month commercial warranty from date of purchase. Warranty covers defects in materials and workmanship under normal use. Not covered: wear items (blades, filters, belts), damage from misuse, lack of maintenance, or unauthorized repairs.

Technical Support: Contact Husqvarna Construction Products at 1-800-487-5962 or visit www.husqvarnacp.com.

Service Centers: Authorized service centers available nationwide. Refer to website for locations.

Manual Updates: Check website for latest version of this service manual.