This document describes a gas string trimmer and brush cutter, model CG520M, manufactured by Huyosen. It serves as an operator's manual, providing instructions for assembly, operation, maintenance, and troubleshooting.
Function Description
The Huyosen CG520M is a versatile outdoor power tool designed for cutting grass and clearing brush. It is equipped with a combustion engine, making it suitable for tasks requiring significant power and mobility. The product can be used with a trimmer head for cutting grass and a 3T blade for brush cutting. Its primary function is to efficiently manage overgrown vegetation in various outdoor environments.
Usage Features
The manual emphasizes safe and correct operation, highlighting several key usage features:
- Assembly: The manual provides detailed instructions for assembling the U-handle, cutting attachment guard, trimmer head, and 3T blade head. It also explains how to assemble the two-piece shaft and properly wear the harness for comfortable and safe operation. The harness is designed to distribute the product's weight, reducing strain on the operator's hands.
- Fueling: The device uses a two-stroke engine, requiring a specific mixture of gasoline and two-stroke oil. The manual provides clear ratios for mixing fuel in various quantities (liters and US gallons) and warns against using incorrect fuel types or four-stroke oil, which can damage the engine. It also advises against mixing fuel for more than one month at a time to ensure optimal performance and prevent operating problems.
- Starting the Engine: Instructions are provided for both cold and warm starts. For a cold start, the operator needs to push the switch button up, push the air primer bulb 6-10 times, move the choke control to the "choke on" position, and pull the starter rope up to 6 times until the engine warms up. For a warm start, the process is simpler, involving pushing the switch button up and pulling the starter rope. The manual cautions against pulling the starter rope all the way out or letting go of the handle abruptly to prevent damage.
- Stopping the Engine: To stop the engine, the operator simply needs to push the switch button down.
- Grass Trimming: When using the trimmer head, the manual advises holding the head parallel to the ground at an angle and moving the product from side to side at full speed. It also suggests decreasing the trimmer line length and engine speed when working near plants to prevent damage.
- Sweeping Grass: The airflow generated by the rotating trimmer line can be used to sweep cut grass from an area. This is achieved by holding the trimmer head parallel to and above the ground, applying full throttle, and moving the head from side to side.
- Safety Devices: The product incorporates several safety features, including a throttle trigger lockout to prevent accidental operation, a stop switch for immediate engine shutdown, and a cutting attachment guard to protect against ejected objects and prevent contact with the cutting attachment. The manual provides instructions on how to check these safety devices to ensure they are functioning correctly.
Maintenance Features
The manual outlines a comprehensive maintenance schedule to ensure the product's longevity and safe operation. Maintenance tasks are categorized as daily, weekly, or monthly.
- External Cleaning: Regular cleaning of the external surface is recommended.
- Throttle Trigger Lockout and Stop Switch Check: Daily checks are required to ensure the throttle trigger lockout and stop switch operate correctly.
- Cutting Attachment Inspection: The cutting attachment should not rotate at idle speed. The cutting attachment guard and trimmer head must be inspected for damages and cracks and replaced if necessary.
- Air Filter Maintenance: The air filter needs to be cleaned daily and replaced if necessary. The manual emphasizes replacing damaged, very dirty, or fuel-soaked air filters.
- Fastener Checks: All screws and nuts should be checked daily to ensure they are tight.
- Engine and Fuel System Inspection: The engine, fuel tank, and fuel lines should be examined daily for leaks. The cooling system needs weekly cleaning. The fuel filter should be checked monthly for contamination, and the fuel hose for cracks or other defects, with parts replaced if necessary.
- Starter and Starter Rope Inspection: Weekly checks are required for damages to the starter and starter rope.
- Vibration Damping Elements: These elements should be examined weekly for damages and cracks.
- Spark Plug Maintenance: The external parts of the spark plug should be cleaned weekly. The electrode gap needs to be checked and adjusted to the correct distance, or the spark plug replaced if necessary. The manual also advises replacing the spark plug monthly and ensuring it is fitted with a suppressor.
- Carburetor Cleaning: The external parts of the carburetor and the surrounding area should be cleaned weekly.
- Bevel Gear Lubrication: The bevel gear should be checked weekly to ensure it is filled ¼ with grease, and Huyosen special grease should be added if necessary.
- Muffler Maintenance: The spark arrestor mesh on the muffler (for mufflers without a catalytic converter) should be cleaned or replaced weekly and monthly. The manual warns against using a product with a faulty muffler and emphasizes the importance of the muffler for noise reduction and directing exhaust fumes away from the operator.
- Cable and Connection Checks: All cables and connections should be checked monthly.
- Clutch System Inspection: If it is necessary to replace the clutch, clutch springs, or clutch drum, the operator is advised to contact Huyosen service.
- Idle Speed Adjustment: Instructions are provided for adjusting the idle speed using the idle adjustment screw, ensuring the cutting attachment stops rotating when the throttle is released. The manual warns against using the product if the cutting attachment does not stop at idle speed and advises contacting Huyosen service for repair.
- Trimmer Head Maintenance: The manual stresses using only recommended cutting attachments and guards. It also highlights the importance of ensuring the cutter on the guard is intact to cut the cord to the correct length and provides instructions for installing the cord. The trimmer head cover should be cleaned each time new trimmer line is assembled to prevent unbalance and vibrations.
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