Homelite UT74121A manual Maintaining the Guide BAR, Maintaining the SAFE-T-TIP Nose Guard

Page 32

MAINTENANCE

RESTORE ORIGINAL

SHAPE BY ROUNDING

THE FRONT

Fig. 67

MAINTAINING THE GUIDE BAR

See Figure 68.

CAUTION:

Make sure the chain has stopped before you do any work on the saw.

Every week of use, reverse the guide bar on the saw to distribute the wear for maximum bar life. The bar should be cleaned every day of use and checked for wear

and damage.

Feathering or burring of the bar rails is a normal process of bar wear. Such faults should be smoothed with a file as soon as they occur.

A bar with any of the following faults should be replaced:

Wear inside the bar rails which permits the chain to lie over sideways

Bent guide bar Cracked or broken rails Spread rails

In addition, lubricate guide bars (with a sprocket at their tip) weekly. Using a grease syringe, lubricate weekly in the lubricating hole.

Turn the guide bar and check that the lubrication holes and chain groove are free from impurities.

LUBRICATING HOLE

Fig. 68

MAINTAINING THE SAFE-T-TIP NOSE GUARD

See Figures 69 and 70.

CAUTION:

Make sure the chain has stopped before you do any work on the saw.

WARNING:

Although the guide bar comes with a SAFE-T-TIP anti- kick-back device already installed, you need to check the tightness of the mounting screw before each use.

Tighten the mounting screw of the nose guard as instructed below. These are specially hardened screws. If you cannot install the screw tightly, replace both the screw and the SAFE-T-TIP before further operation. Do not replace the screw with an ordinary screw.

In addition to preventing chain contact with solid objects at the nose of the bar, the SAFE-T-TIP also helps keep the chain away from abrasive surfaces, such as the ground. Keep it on the right-hand side of the bar where it will be between the chain and the ground during flush with ground cutting.

The mounting screw requires a 5/16 in. spanner (or adjustable spanner) to achieve the recommended tightness of 4-5 Nm (35 - 45 in. lb.). A tightness within this range can be achieved by using the following method.

1.Tighten the screw with your finger.

2.Tighten the screw an additional three-quarters of a turn using a spanner.

MOUNTING

SCREW

SAFE-T-TIP

Fig. 69

UK - Page 32

Page 31 Page 33
Image 32
Page 31 Page 33
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 24Brake Position RUN Position Adjusting Idling SpeedOperating the Chain Brake Felling Trees Hazardous Conditions Retreat PathRetreat Proper Procedure for Tree FellingPlanned Line of Fall 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 Side Plate Angle Maintaining Depth Gauge ClearanceTOP Plate Filing 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 LongerBAR and Chain Combinations TroubleshootingProblem Possible Cause Solution 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.
Top Page Image Contents