Husqvarna 3120XP manual Needle bearing lubrication, Adjustment of the oil pump, Cooling system

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MAINTENANCE

Needle bearing lubrication

The clutch drum is ﬁtted with one of the following drive sprockets:

•A Spur sprocket (the chain sprocket is welded on the drum) •B Rim sprocket (replaceable)

•Both versions have a needle bearing on the drive shaft, which has to be greased regularly (once a week).

NOTE! Use a high-quality bearing grease or engine oil.

Adjustment of the oil pump

The oil pump is adjustable. Adjustments are made by turning the screw using a screwdriver or combination spanner. The machine is supplied from the factory set to 1 turn open. Turning the screw clockwise will reduce the oil ﬂow and turning the screw anti-clockwise will increase the oil ﬂow.

	!	WARNING! The engine must not be
	!	running when making adjustments.
		running when making adjustments.

Recommended settings:

Bar 24"-28": 0 turns from the closed position.

Bar 28"-34": 3/4 turns from the closed position.

Bar 34"-42": 1 1/2 turns from the closed position.

Bar 42" and longer: 1 3/4 turns from the closed position.

These recommendations apply to Husqvarna’s chain oil, for other chain oils increase the oil ﬂow by one step.

Cooling system

To keep the working temperature as low as possible the machine is equipped with a cooling system.

The cooling system consists of:

1Air intake on the starter.

2Air guide plate.

3Fins on the ﬂywheel.

4Cooling ﬁns on the cylinder.

5Cylinder cover (directs cold air over the cylinder).

Clean the cooling system with a brush once a week, more often in demanding conditions. A dirty or blocked cooling system results in the machine overheating which causes damage to the piston and cylinder.

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Contents 3120XP Symbols in the operator’s manual KEY to SymbolsSymbols on the machine Contents Dear Customer IntroductionWhat is what on the chain saw? What is WHAT?Always use common sense General Safety PrecautionsBefore using a new chain saw Chain brake and front hand guard Machine′s safety equipmentPersonal protective equipment General Safety Precautions Vibration damping system Throttle lockoutChain catcher Right hand guardGeneral rules Stop switchCutting equipment MufﬂerSharpening your chain and adjusting depth gauge setting Too large Increased if the depth gauge setting isAdjustment of depth gauge setting Chain oil Tensioning the chainLubricating cutting equipment Which could lead to serious, even fatalChecking wear on cutting equipment Checking chain lubricationChain drive sprocket Needle bearing lubricationBar Working with the chain AssemblyFitting the bar and chain Fuel Fuel HandlingExtra chain oil Fuel safetyFuelling Long-term storage Transport and storageWarm engine Starting and StoppingStarting and stopping Cold engineStopping General working instructions Basic safety rulesWorking Techniques Before useWorking Techniques Limbing Basic cutting techniqueTerms There are ﬁve important factors you should considerFelling direction Tree felling techniqueSafe distance Your saw Clearing the trunk and preparing your retreatFelling cut Felling Training we advise you not to fell treesCutting trees and branches that are in tension General adviceFreeing a tree that has fallen badly Freeing a trapped treeCutting the trunk into logs How to avoid kickbackWhat is kickback? Carburettor MaintenanceHigh speed jet H Correctly adjusted carburettorImmediately Checking the brake triggerChanging a broken or worn starter cord MufﬂerStarter Fitting the starter Tensioning the recoil springChanging a broken recoil spring Must always be replaced Air ﬁlterSpark plug Lubricating the bar tip sprocketCooling system Adjustment of the oil pumpNeedle bearing lubrication Daily maintenance Weekly maintenance Monthly maintenance Maintenance scheduleTechnical data Technical DataSaw chain ﬁling and ﬁle gauges Guide bar and saw chain combinations0404/09/2119 EC-declaration of conformityApplies to Europe only EN ISO 121002010, ISO 149822009, EN ISOOriginal instructions 1153183-26

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