Owner's Manual for a TS 400 Stihl Concrete Saw

The STIHL TS 400 is a professional-grade concrete saw designed for cutting concrete, asphalt, and masonry. It features a powerful engine, diamond cutting blades, water feed system for dust suppression, ergonomic handles, safety features including a chain brake and throttle lockout, and is built for heavy-duty construction and demolition work. Below are key sections for safety, features, assembly, operation, maintenance, and troubleshooting.

1. Features at a Glance 2. Assembly & Preparation 3. First-Time Operation 4. Specifications 5. Controls and Settings 6. Cutting Procedures 7. Maintenance Schedule 8. Safety Features 10. Care & Storage 11. Regulatory Information 12. Troubleshooting

Features at a Glance

Key components: High-performance engine, Diamond cutting blade, Water connection and pump, Front and rear handles, Throttle trigger with lockout, Chain brake (if equipped), Depth adjustment gauge, Blade guard.

Feature	Description
Engine	2-stroke gasoline engine for high torque cutting
Cutting Blade	Diamond-tipped blade for concrete and masonry
Water Feed System	Connects to water source to suppress dust and cool blade
Ergonomic Handles	Vibration-dampened front and rear handles for control
Throttle Lockout	Prevents accidental throttle engagement
Chain Brake	Stops blade rotation in case of kickback (if equipped)
Depth Adjustment	Manual gauge to set cutting depth
Blade Guard	Protective cover over cutting blade
Fuel Tank	Integrated tank for gasoline/oil mix
Carrying Handle	For transport and positioning

Assembly & Preparation

Unpack and inspect all parts. Assemble on a clean, flat surface.

Attach handles: Secure front and rear handles with provided bolts.
Install cutting blade: Ensure machine is off; mount diamond blade onto arbor, secure with flange and nut.
Connect water system: Attach water hose to inlet; check for leaks.
Fuel mix: Prepare correct gasoline and 2-stroke oil mixture (refer to specifications).
Check all fasteners: Ensure all nuts, bolts, and guards are tight.

WARNING! Always wear personal protective equipment (PPE) including safety glasses, gloves, hearing protection, and dust mask during assembly and operation.

First-Time Operation

Perform pre-operation checks before starting.

Check fuel: Ensure proper fuel mix in tank.
Check water supply: Connect to water source; turn on to ensure flow to blade.
Start engine: Set on flat surface; engage throttle lockout; pull starter cord firmly.
Warm up: Allow engine to run at idle for 1-2 minutes.
Test controls: Verify throttle response, chain brake (if equipped), and stop switch.
Practice cutting: On a scrap material to get feel of saw.

CAUTION! Never operate without water supply for dust control. Keep bystanders at a safe distance.

Specifications

Engine Type: 2-stroke, air-cooled.
Displacement: [e.g., 40.2 cc] (Refer to actual model plate).
Power Output: High torque for demanding cuts.
Cutting Depth: Adjustable, max depth typically up to [e.g., 5 inches].
Blade Diameter: Compatible with [e.g., 12-14 inch] diamond blades.
Water Connection: Standard garden hose thread.
Fuel: Gasoline with 2-stroke oil mix (ratio per manual, e.g., 50:1).
Weight: Approximately [e.g., 30 lbs] without blade.
Vibration Damping: Integrated to reduce operator fatigue.

Controls and Settings

Main Controls: Throttle trigger, Throttle lockout, Stop switch, Choke, Starter grip, Depth adjustment knob, Water flow valve.

Operation: Squeeze throttle lockout and trigger to increase engine speed. Release to idle. Use stop switch to kill engine instantly.

Settings: Depth adjustment via rear gauge; set before cutting. Water flow valve controls water to blade; adjust for adequate dust suppression. Choke for cold starts.

Cutting Procedures

For cutting concrete, asphalt, brick, or stone.

Mark cut line: Use chalk or marker on surface.
Set depth: Adjust gauge to desired cutting depth.
Start water: Ensure steady flow to blade.
Start saw: Allow blade to reach full speed before contacting material.
Begin cut: Lower blade gently onto mark; let saw do the work—do not force.
Guide saw: Keep firm grip, follow line steadily.
Complete cut: At end, release throttle, allow blade to stop before lifting.
Shut down: Turn off engine, close water supply.

Tip: Make multiple passes for deeper cuts. Always cut in a well-ventilated area or outdoors.

Maintenance Schedule

Regular maintenance ensures performance and longevity.

Interval	Task
Before each use	Check fuel, water connections, blade tightness, guards
After each use	Clean saw, flush water system, inspect blade for damage
Every 20 hours	Check air filter, clean or replace
Every 50 hours	Check spark plug, replace if worn
Every 100 hours	Inspect fuel lines, carburetor adjustment (by qualified technician)
Seasonal	Drain fuel for storage, lubricate moving parts

WARNING! Perform maintenance only when saw is off and cool. Disconnect spark plug wire for safety.

Safety Features

Throttle Lockout: Prevents accidental throttle activation. Chain Brake: Inertia-activated to stop blade upon kickback. Blade Guard: Covers blade except cutting area. Vibration Damping: Reduces operator fatigue. Stop Switch: Immediate engine shut-off.

Care & Storage

Clean after each use with dry cloth. Store in dry, cool place.

Drain fuel tank if storing over 30 days.
Remove blade, clean and store separately.
Lubricate exposed metal parts to prevent rust.
Cover saw to protect from dust.

CAUTION! Never store with fuel in tank in enclosed spaces due to fire risk.

Regulatory Information

EPA and CARB compliant for emissions. Meets ANSI safety standards for power tools. Copyright © STIHL Incorporated. All rights reserved. For genuine STIHL parts and service, contact authorized STIHL dealers. Customer support: 1-800-467-8445 or www.stihlusa.com.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Engine won't start	No fuel, flooded, spark plug	Check fuel mix; wait if flooded; inspect/clean spark plug.
Loss of power	Clogged air filter, old fuel	Clean/replace air filter; use fresh fuel mix.
Excessive vibration	Loose blade, damaged blade	Tighten blade mounting; replace damaged blade.
Blade not cutting well	Dull blade, improper type	Replace with sharp diamond blade for material.
Water not flowing	Kinked hose, clogged nozzle	Check hose; clean water inlet and nozzle.
Chain brake engaged	Kickback activated brake	Reset brake by pulling handle toward front bar.

Service: For repairs beyond basic maintenance, contact authorized STIHL service dealer.

Support: 1-800-467-8445; www.stihlusa.com