Homelite UT74121A manual Cleaning the Spark Arresting SI- Lencer, Chain Brake

Page 35

MAINTENANCE

CLEANING THE SPARK ARRESTING SI- LENCER

The silencer is equipped with a spark arrester screen. A faulty spark arrester screen can create a fire hazard. Through normal use the screen becomes dirty and should be inspected weekly and cleaned as required. Always keep the silencer and spark arrester on your saw in good condition.

WARNING

Silencer surfaces are very hot during and after operation of the chainsaw: keep all body parts away from the silencer. Serious burns may occur if contact is made with the silencer.

1.Allow the silencer to cool.

2.The spark arrester screen is retained by the deflector. Remove the three nuts and screen retainer to access the spark arrester screen.

3.Replace the spark arrester screen if it is cracked or otherwise deteriorated.

SPARK ARRESTER

SCREEN

DEFLECTOR SILENCER

DEFLECTOR

RETAINING

SCREW

NUTS

Fig. 79

CHAIN BRAKE

Remove the clutch cover and clean the chain brake components. Check wear on the brake band and replace if worn or deformed. The band thickness should not be less than 0.60 mm (0.024 in.), or worn halfway through.

Always keep the chain brake mechanism clean and lightly lubricate the linkage.

Always test the chain brake performance after servicing or cleaning. Refer to “Operation - Operating Chain Brake” earlier in this manual for additional information.

Check and, if damaged, replace the chain catcher.

CHAIN CATCHER

BRAKE BAND

Fig. 80

CLEAN THE CHAIN BRAKE

LUBRICATE THE CHAIN

BRAKE LINKAGE

 

Fig. 81

STORING THE CHAINSAW (1 MONTH OR LONGER)

1.Drain all fuel from tank into a container approved for petrol.

2.Run the engine until it stops. This will remove all fuel-oil mix which could become stale and leave varnish and gum in the fuel system.

3.Drain all bar and chain oil from tank into a container approved for oil.

4.Clean all foreign material from the saw.

5.Store it in a well ventilated place that is inaccessible to children.

NOTE: Keep away from corrosive agents such as garden chemicals and de-icing salts.

Abide by all regulations for the safe storage and handling of petrol. Excess fuel should be used in other 2-cycle engine powered equipment.

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Contents Save this Manual for Future Reference OPERATOR’S ManualIntroduction Table of ContentsRead ALL Instructions General Safety RulesDo not Operate a Chainsaw That is Damaged Basic Precautions in the CUTTING/ Work Area Specific Safety RulesGeneral Precautions Safety ApparelPull Push Maintenance PrecautionsPush and Pull KICK-BACKStop SymbolsSymbol Name Explanation RUNSpecifications Features Guide Bars Understanding Your Chainsaw Safety DevicesOperation LOW KICK-BACK SAW ChainKICK-BACK Brake Position Rotational KICK-BACK PrecautionsChain Brake RUN PositionFilling the Tank Fuel and RefuellingHandling the Fuel Safely Mixing the FuelSee Figures 10 to Brake Position Ignition Switch RUN Primer BulbChain OIL System Starting the EngineStarting a Cold Engine Starting a Warm Engine Stopping the EngineProper Grip Preparing for CuttingProper Grip on Handles Chain LineSee Figures 24 Basic OPERATING/CUTTING ProceduresWork Area Precautions Adjusting the CarburettorBrake Position RUN Position Adjusting Idling SpeedOperating the Chain Brake Retreat Path Felling Trees Hazardous ConditionsRetreat Proper Procedure for Tree FellingPlanned Line of Fall Wedge HingeNotch Approx /3 Diameter Trunk Back CUT Hinge Back CUTVertical CUT Loose Section Horizontal KICK-BACK Wedge Removing Buttress RootsBucking Bucking with a WedgeLOG Supported AT ONE END Finishing CUT Bucking Logs Under StressOverbucking UnderbuckingFinishing CUT Spring Pole Limbing and PruningCutting Spring Poles Load Second CUTAssembling the BAR and Chain MaintenanceCutters Chain Tensioning Screw Flats on Drive Links Adjusting the Chain TensionChain Maintenance See Figures 52, 53Sharpening the Cutters Check for Wear or Damage LEFT-HAND Cutters RIGHT-HAND Side Plate Angle Maintaining Depth Gauge ClearanceTOP Plate Filing Angle Lubricating Hole Restore Original Shape by Rounding FrontMaintaining the Guide BAR Maintaining the SAFE-T-TIP Nose GuardSee Figures 71, 72 Cleaning the AIR FilterMounting the SAFE-T-TIP Nose Guard Tighten 3/4 TurnReplacing the Sparking Plug Cleaning the Starter UnitCleaning the Engine Checking the Fuel FilterStoring the Chainsaw 1 Month or Longer Cleaning the Spark Arresting SI- LencerChain Catcher Brake Band Clean the Chain Brake Chain BrakeBAR and Chain Combinations TroubleshootingProblem Possible Cause Solution But chain is not rotating Tions. See FigureEC Declaration of Conformity WarrantySafety Directive Guarantee Statement Rtsa / Rtuk / RTGPage Ryobi Technologies GmbH

UT74121A specifications

The Homelite UT74121A is a versatile gas-powered string trimmer designed for homeowners and landscapers seeking an efficient tool for maintaining their lawns and gardens. Known for its reliability, the UT74121A combines performance with user-friendly features that make lawn care tasks less daunting.

One of the standout features of the UT74121A is its powerful 26cc 2-cycle engine. This engine provides ample power for cutting through dense grass and weeds, ensuring that tasks are completed quickly and efficiently. The lightweight design of the trimmer, coupled with its ergonomic handle, allows users to maneuver easily, making it ideal for extended use without causing fatigue.

The Homelite UT74121A is equipped with an easy-to-load bump feed spool for quick line replacement. Users can effortlessly advance the cutting line by tapping the trimmer's head on the ground, making it convenient to maintain the desired cutting length without interrupting work. The trimmer uses .095-inch diameter line, which provides durability and resilience against tough conditions.

In terms of design, the UT74121A features a straight shaft that offers increased reach and allows users to access hard-to-reach areas with ease. This design is particularly helpful for trimming along fences, in flower beds, and under low-hanging branches. The adjustable handle height further enhances user comfort, allowing for customization based on individual preferences.

Safety is a primary concern for any outdoor equipment, and the UT74121A incorporates several features to enhance user safety. It comes with a protective shield that prevents debris from being thrown during operation, and the easy-starting system reduces pull effort, making it accessible for users of all skill levels.

The trimmer also adheres to stringent emissions standards, making it an environmentally-friendly option in today's market. With proper maintenance, the UT74121A ensures longevity and sustained performance, making it a valuable addition to any landscaping toolkit.

Overall, the Homelite UT74121A is a powerful and efficient solution for those seeking a reliable string trimmer. Its combination of a robust engine, user-centric design, and safety features makes it suitable for various lawn care tasks, ensuring gardens and lawns remain well-groomed year-round.
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