Homelite UT74121A manual Adjusting the Chain Tension, Chain Maintenance, See Figures 52, 53

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MAINTENANCE

ADJUSTING THE CHAIN TENSION

See Figures 52, 53 and 54.

WARNING:

Never touch or adjust the chain while the motor is running. The saw chain is very sharp. Always wear protective gloves when performing maintenance on the chain.

1.Stop the engine before setting the chain tension.

2.Make sure the guide bar nuts are loosened to finger-tight and turn the chain tensioner clockwise to tension

the chain.

NOTE: A cold chain is correctly tensioned when there is no slack on the underside of the guide bar, the chain is snug and it can be turned by hand without binding.

3.Re-tension the chain whenever the flats on the drive links hang out of the bar groove.

NOTE: During normal saw operation, the temperature of the chain increases. The drive links of a correctly tensioned warm chain will hang approximately 1.25 mm (0.050 in.) out of the bar groove. To help determine the correct warm chain tension, the tip of the combination wrench can be used as a guide.

NOTE: New chain tends to stretch. Check the chain tension frequently and tension as required.

CAUTION:

A chain tensioned while warm may be too tight on cooling. Check the “cold tension” before next use.

FLATS ON DRIVE LINKS

Fig. 52

APPROXIMATELY 1.25 mm (0.050 in.)

Fig. 53

APPROXIMATELY 1.25 mm (0.050 in.)

Fig. 54

CHAIN MAINTENANCE

CAUTION:

Check that the switch is in the STOP “” position before working on the saw.

Use only a low-kick-back chain on this saw. This fast-cutting chain provides kick-back reduction when properly maintained.

For smooth and fast cutting, maintain the chain properly.

The chain requires sharpening when the wood chips are small and powdery, the chain must be forced through the wood during cutting, or the chain cuts to one side. During maintenance of the chain, consider the following:

Improper filing angle of the side plate increases the risk of a severe kick-back.

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Contents OPERATOR’S Manual Save this Manual for Future ReferenceTable of Contents IntroductionGeneral Safety Rules Read ALL InstructionsDo not Operate a Chainsaw That is Damaged Specific Safety Rules General PrecautionsSafety Apparel Basic Precautions in the CUTTING/ Work AreaMaintenance Precautions Push and PullKICK-BACK Pull PushSymbols Symbol Name ExplanationRUN StopSpecifications Features Understanding Your Chainsaw Safety Devices OperationLOW KICK-BACK SAW Chain Guide BarsKICK-BACK Precautions Chain BrakeRUN Position KICK-BACK Brake Position RotationalFuel and Refuelling Handling the Fuel SafelyMixing the Fuel Filling the TankBrake Position Ignition Switch RUN Primer Bulb Chain OIL SystemStarting the Engine See Figures 10 toStarting a Cold Engine Stopping the Engine Starting a Warm EnginePreparing for Cutting Proper Grip on HandlesChain Line Proper GripBasic OPERATING/CUTTING Procedures Work Area PrecautionsAdjusting the Carburettor See Figures 24Operating the Chain Brake Adjusting Idling SpeedBrake Position RUN Position Felling Trees Hazardous Conditions Retreat PathPlanned Line of Fall Proper Procedure for Tree FellingRetreat Hinge Notch Approx /3 Diameter Trunk Back CUTHinge Back CUT WedgeRemoving Buttress Roots BuckingBucking with a Wedge Vertical CUT Loose Section Horizontal KICK-BACK WedgeBucking Logs Under Stress OverbuckingUnderbucking LOG Supported AT ONE END Finishing CUTLimbing and Pruning Cutting Spring PolesLoad Second CUT Finishing CUT Spring PoleMaintenance Assembling the BAR and ChainCutters Chain Tensioning Screw Adjusting the Chain Tension Chain MaintenanceSee Figures 52, 53 Flats on Drive LinksSharpening the Cutters Check for Wear or Damage LEFT-HAND Cutters RIGHT-HAND TOP Plate Filing Angle Maintaining Depth Gauge ClearanceSide Plate Angle Restore Original Shape by Rounding Front Maintaining the Guide BARMaintaining the SAFE-T-TIP Nose Guard Lubricating HoleCleaning the AIR Filter Mounting the SAFE-T-TIP Nose GuardTighten 3/4 Turn See Figures 71, 72Cleaning the Starter Unit Cleaning the EngineChecking the Fuel Filter Replacing the Sparking PlugCleaning the Spark Arresting SI- Lencer Chain Catcher Brake Band Clean the Chain BrakeChain Brake Storing the Chainsaw 1 Month or LongerProblem Possible Cause Solution TroubleshootingBAR and Chain Combinations Tions. See Figure But chain is not rotatingWarranty Safety DirectiveGuarantee Statement Rtsa / Rtuk / RTG EC Declaration of ConformityPage 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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