Homelite UT74121A manual KICK-BACK Precautions, Chain Brake, RUN Position

Page 11

OPERATION

CHAIN BRAKE

Chain brakes are designed to quickly stop the chain from rotating. When the chain brake lever/hand guard is pushed towards the bar, the chain should stop immediately.

A chain brake does not prevent kick-back.

The chain brake should be cleaned and tested daily. Refer to “Operation” later in this manual for additional information.

WARNING:

Even with daily cleaning of the mechanism, the dependability of a chain brake to perform under field conditions cannot be certified. Keep the SAFE-T-TIP nose guard on the saw guide bar and use proper cutting techniques.

RUN POSITION

WARNING:

KICK-BACKoccurs when the moving chain contacts an object at the upper portion of the tip of the guide bar or when the wood closes in and pinches the saw chain in the cut. Contact at the upper portion of the tip of the guide bar may cause the chain to dig into the object and stop the chain for an instant.

The result is a lightning-fast, reverse reaction which kicks the guide bar up and back towards the operator. If the saw chain is pinched along the top of the guide bar, the guide bar can be driven rapidly back towards the operator. Either of these reactions may cause you to lose control of the saw, which could result in serious injury.

Do not rely exclusively on the safety devices built into the saw. As a chainsaw user, you should take several steps to keep your cutting jobs free from accident or injury.

KICK-BACK PRECAUTIONS

Rotational kick-back occurs when the moving chain contacts an object at the Kick-back Danger Zone of the guide bar. The result is a lightning-fast, reverse reaction which kicks the guide bar up and back towards the operator.

This reaction can cause loss of control which may result in serious injury.

KICK-BACK

DANGER ZONE

BRAKE

POSITION

Fig. 6

Fig. 5

ROTATIONAL

KICK-BACK

Fig. 7

UK - Page 11

Page 10 Page 12
Image 11
Page 10 Page 12
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.
Top Page Image Contents