McCulloch MC4218AV, 966625301 Chain Tension, Checking the tension, Adjusting the tension

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Inside view of clutch cover

Adjustment located on clutch cover

4.Turn the adjusting screw by hand coun- terclockwise until the adjusting pin just touches the stop. This should allow the pin to be near the correct position.

5.Slide guide bar on bar bolts until guide bar stops against clutch drum sprocket.

Bar bolts

Guide bar

6.Carefully remove the chain from the pack- age. Hold chain with the drive links as shown.

Tip of

Bar

Clutch

Cover

Adjusting Pin Lower

Hole

Guide Bar

12.Install bar nuts and finger tighten only. Once the chain is tensioned, you will need to tighten bar nuts.

CHAIN TENSION

(Including units with chain already installed)

WARNING: Wear protective gloves when handling chain. The chain is sharp and can cut you even when it is not moving.

NOTE: When adjusting chain tension, make sure the bar nuts are finger tight only. Attempting to tension the chain when the bar nuts are tight can cause damage.

Checking the tension:

Use the screwdriver end of the chain adjust- ment tool (bar tool) to move chain around guide bar. If the chain does not rotate, it is too tight. If the chain is too loose, it will sag below the bar.

Guide

Bar

CUTTERS MUST FACE IN

DIIRECTION OF ROTATION

Cutters

Depth Gauge

Drive Links

7.Place chain over and behind the clutch retainer, fitting the drive links in the clutch drum sprocket.

8.Fit bottom of drive links between the teeth in the sprocket in the nose of the guide bar.

9.Fit chain drive links into bar groove.

10.Pull guide bar forward until chain is snug in guide bar groove. Ensure all drive links are in the bar groove.

11.Now, install clutch cover making sure the adjusting pin is positioned in the low- er hole in the guide bar. Remember this pin moves the bar forward and back- ward as the screw is turned.

 

Chain Adjustment

Bar Nuts

Tool

(Bar Tool)

 

Adjusting the tension:

Chain tension is very important. Chains stretch during use. This is especially true during the first few times you use your saw. Always check chain tension each time be- fore you start the chain saw.

1.Loosen bar nuts until they are finger tight against the clutch cover.

2.Turn adjusting screw clockwise until chain solidly contacts bottom of guide bar rail.

Adjusting

Screw

3.Using bar tool, roll chain around guide bar to ensure all links are in bar groove.

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Contents Manual de Instrucciones Manuel d’Instructions Plan Ahead Using the chain sawAlways use two hands when operating the chain saw Starting ReminderKickback Operate Your SAW SafelyMaintain Your SAW in Good Working Order Handle Fuel with CautionAvoid Pull-In Reduce the Chance of KickbackMaintain Control Avoid Pinch-KickbackChain Brake and CKA Angle Kickback Safety FeaturesIf your hand slips off the front handlebar Attaching the BAR & Chain If not AssemblyChain Tension Adjusting the tensionChecking the tension Operation ON/STOP Switch Throttle TriggerKnow Your Chain SAW Chain Brake Throttle LOCK-OUTCHOKE/FAST Idle Lever Primer BulbRight Foot Through Rear Handle Important Points to RememberStarting a Warm Engine Difficult Starting or starting a flooded engineTree Felling Techniques Braking function control Caution The chain brake must beInertia activating function control Operating TipsImportant Points Felling Large TreesNotch CUT and Felling the Tree Cutting a Fallen TreeLimbing Bucking Using a LOG or Support StandBucking Without a Support Limbing and Pruning Important PointsService Check Fuel Mixture Level Inspect and Clean Unit and DecalsClean AIR Filter Check Guide BARTo Sharpen Chain Cleaning the Spark ARREST- ING ScreenChain Adjustment Replace Spark PlugCooling System Carburetor AdjustmentStorage Idle Speed-TOther Load Adjustment EngineFuel System EngineLigations The U.S. Environmental McCulloch