Echo X7503196704, X750010904 instruction manual Adjusting Chain Tension

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Clutch

Guide bar studs

 

Guide bar

 

adjuster

Hole

hole

Pin

Nuts

Adjuster pin

 

 

Clutch cover

Brake band

 

 

Brake connector

Unlock chain brake

6.Mount guide bar on studs and slide toward clutch to make saw chain installation easier. In- stall chain with cutters on top of guide bar facing forward.

7.Unlock the chain brake, and install the clutch cover over the guide bar studs. Ensure chain tension adjuster pin fits into the guide bar adjuster hole, brake band is positioned around clutch drum, and pin at rear of clutch cover fits hole on engine cover. Tighten clutch cover nuts finger tight.

8.Turn saw over, and check brake band for correct position on clutch drum. If brake band is not in place around drum, remove cover, make sure brake is unlocked, and reinstall. Tighten clutch cover nuts finger tight.

WARNING

Improper clutch cover assembly can result in serious injury, and will cause severe saw damage if unit is started. Never start or operate saw if brake band is not in place on clutch drum. Always check chain brake operation after replacing cover. Do not use saw if chain brake does not function properly.

Direction to tension the chain

Adjusting screw

Proper tension Improper tension

CS-450

ADJUSTING CHAIN TENSION

IMPORTANT

Always loosen clutch cover nuts before turning the chain tension adjuster, otherwise the clutch cover and tensioner will be damaged.

1.Loosen air cleaner cover knob and remove air cleaner cover.

2.Remove spark plug lead.

3.Loosen two clutch cover nuts, if necessary.

4.Hold the bar nose up, and turn the adjuster screw clockwise until chain contacts underside of the bar.

5.Tighten both nuts with the bar nose held up.

6.Pull the chain around the bar by hand. Loosen the adjustment if you feel tight spots.

7.When chain is properly tensioned, tighten clutch cover nuts securely - 20 to 23 N·m (175 to 200 in. lb.).

8.Keep chain properly tensioned at all times.

Note

All chains require frequent adjustments.

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Contents Chain Saw Kickback Safety Precautions for Chain Saw Users Rules for Safe OperationOther Safety Precautions Contents Symbols and SignsSymbol Form DecalsPacking List Emission Data emission control exhaust & evaporativeNomenclature of Parts Operator Safety Front handle for the left hand Support hanVibration and Cold Repetitive Stress InjuryEYE and Hearing Protection Wear Proper ClothingCorrect USE of Chain Brake Spark Arrestor MufflerPreparation for USE Kick Guard to BAR INSTRUC- TionsGuide BAR and SAW Chain IN- STALLATION/REMOVAL Adjusting Chain Tension Handling Fuel Chain Lubricant Mixing InstructionsOperation When the Engine is Cold When the Engine is WarmRunning StoppingChecking Chain Tension Chain Lubrication TestCutting Instruction GeneralFelling the Tree Limbing Testing the Brake Chain Brake OperationAutomatic Chain Brake Winter OperationChain and Guide BAR Combination CS-450Maintenance and Care Maintenance IntervalsCarburetor Adjustment Engine Break-InAIR Filter OIL FilterCheck Fuel System Spark PlugGuide BAR SprocketCylinder Fins Muffler Spark ArrestorExhaust Port Cleaning Setting the SAW Chain Setting SAW Chain64 mm 0.025 Troubleshooting Technical Data Storage After USEExceptions 99922201032 11/18/2011 99922201033 ECHO, Incorporated

X750010904, X7503196704 specifications

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