Makita UC3550A, UC4050A, UC4550A, UC4051A Adjusting the chain lubrication, Checking the chain brake

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Checking the chain brake

NOTE:

If the chain saw fails to start, check whether the chain brake is released. To release the chain brake, pull the hand guard backwards firmly until you feel it engage.

Checking the chain oiler

Before starting work, check the oil level in the tank, and the oil delivery.

The oil level can be seen in the oil level sight shown in the figure.

1. Oil level sight

3

2

 

1

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2

3

1

1.Front hand guard

2.Lock

3.Unlock

1.Front hand guard

2.Unlock

3.Lock

1

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Check the oil delivery as follows: Start the chain saw.

With the saw running, hold the saw chain approximately 15 cm above a tree trunk or the ground. If lubrication is adequate, the oil spray will produce a light oil trace.

Observe the wind direction, and do not expose yourself to the oil spray unnecessarily.

CAUTION:

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Check the chain brake as follows:

1.Hold the chain saw with both hands when switching it on. Hold the rear handle with your right hand, the front handle with your left. Make sure that the bar and the chain do not contact with any object.

2.First press the lock-off button, then the switch trigger. The saw chain starts immediately.

3.Press the front hand guard forwards using the back of your hand. Make sure that the saw chain comes to an immediate standstill.

CAUTION:

If the saw chain does not stop immediately, do not use the saw under any circumstances. Consult

Makita authorized service centers.

Checking the run-down brake

Switch on the chain saw.

Release the switch trigger completely. Make sure the saw chain comes to a standstill within a second.

CAUTION:

If the saw chain does not stop immediately, do not use the saw under any circumstances. Consult Makita authorized service centers.

If an oil trace is not formed, do not use the saw. The lifespan of the chain will otherwise be reduced. Check the oil level. Clean the oil feed groove and the oil feed hole in the bar (refer to "MAINTENANCE ").

Adjusting the chain lubrication

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You can adjust the oil pump feed rate with the adjusting screw.

WORKING WITH THE CHAIN SAW

CAUTION:

Always use a front handle and rear handle and firmly hold the tool by both front handle and rear handle during operations.

Always secure the timber to be cut, otherwise the cut fragments may cause personal injury.

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Contents Electric Chain Saw Symbol SpecificationsPower supply English Original instructionsGeneral Power Tool Safety Warnings Chain saw safety warnings Proper use Additional Safety RulesPersonal protective equipment Protection against electric shockKickback Maintenance Safety featuresTransport and storage First aidFor Model UC3050A, UC3550A, UC4050A, UC4550A Designation of PartsFor Model UC3051A, UC3551A, UC4051A, UC4551A Removing or installing sprocket cover AssemblyRemoving or installing saw chain For nut modelsAdjusting dial Switch action Adjusting saw chain tensionOperation Engaging extension cordChecking the chain tension Checking the switch actionChecking the chain brake Adjusting the chain lubricationChecking the chain oiler Checking the run-down brakeLimbing BuckingBurrowing and parallel-to-grain cuts FellingCleaning the chain saw MaintenanceChecking the plastic housing Sharpen the saw chain when Sharpening the saw chainSharpening criteria File and file guidingCleaning the oil guide Cleaning the guide bar and lubricating the return sprocketNew saw chains Maintaining the chain and run-down brakesStoring tool Replacing carbon brushesOptional Accessories Trouble ShootingPossible cause Remedy Makita Corporation