The device described in the manual is a 52CC Chainsaw with a 20-inch guide bar and 2.7HP engine, designed for cutting wood. It is an EPA gasoline crankcase model, identified by Item: 82104. This chainsaw is a powerful tool intended for strenuous work and requires careful handling and adherence to safety guidelines.
Function Description:
The chainsaw's primary function is to cut wood using a rotating saw chain driven by a gasoline engine. It is equipped with features to enhance safety and operational control, such as a chain brake, throttle interlock, and adjustable chain oil flow. The engine is designed to run on a mixed fuel (gasoline and 2-stroke motor oil) and requires specific maintenance for optimal performance.
Important Technical Specifications:
- Model: 82100/82100-XP
- Engine Type: 2-cycle, air-cooled gasoline engine
- Engine Power: 1.8 kW (2.7 HP)
- Displacement: 52CC
- Guide Bar Size: 20 inches (also compatible with 22 inches)
- Saw Chain Pitch: 0.325 inches
- Saw Chain Gauge: 0.058 inches
- Sprocket: 7T x 0.325 inches
- Maximum Engine Speed with Cutting Attachment: 12000 rpm
- Maximum Engine Speed at Idle: 3400 rpm
- Maximum Cutting Length: 53 cm
- Fuel Tank Capacity: 550 ml
- Oil Tank Capacity: 250 ml
- Fuel Mixture Ratio: 35:1 Mix for up to 20 hours use, 40:1 Mix after 20 hours use (Gasoline: 2-cycle Oil)
- Chain Oil Type: Motor Oil SAE#10W-30 (all year round) or SAE#30-#40 (colder temperatures)
- Mass (Without guide bar and chain): 5.2 kg
- Dimensions (Without guide bar and chain): 480 x 260 x 300 mm
- Oil Feeding System: Automatic Pump with Adjuster
- Spark Plug Gap: 0.65 mm
Usage Features:
The chainsaw is designed for two-handed operation and emphasizes user safety through several integrated features and operational procedures:
- Front Guard: Protects the operator's hand.
- Starter Knob: Used for manual engine starting.
- Air Cleaner: Filters incoming air for the engine.
- Choke Knob: Used to enrich the fuel mixture for cold starts.
- Throttle Interlock and Trigger: Prevents accidental acceleration.
- Engine Switch: Used to stop the engine.
- Fuel Tank and Oil Tank: Separate tanks for mixed fuel and chain oil.
- Front and Rear Handles: Provide a secure grip for two-handed operation.
- Saw Chain and Guide Bar: The cutting components.
- Chain Brake: An automatic safety mechanism that stops the chain upon kickback, activated by inertial force or manually by pushing the front guard forward. It is crucial to check its operation before each use.
- Adjustable Chain Oil Flow: Allows the user to control the amount of oil supplied to the chain and guide bar, adjustable via a screw on the clutch side.
- Carburetor Adjustment: The carburetor can be fine-tuned for optimal performance based on operating conditions, with specific adjustments for H-Needle, L-Needle, and Idle Adjusting Screw.
- Starting Procedure: Involves filling fuel and oil tanks, setting the engine switch, engaging the throttle lock button, pulling out the choke knob for cold starts, and vigorously pulling the starter rope. The choke knob is pushed in once the engine ignites.
- Stopping Procedure: Involves idling the engine for 1-2 minutes, then setting the engine switch to the "O" (Stop) position.
- Sawing Guidelines: Recommends practicing on easy logs, using only for cutting wood, avoiding forcing the saw, and using wedges if the saw gets caught.
- Kickback Prevention: Highlights the importance of the chain brake and proper operating techniques to prevent kickback, which can cause serious injury.
- Personal Protective Equipment (PPE): Emphasizes the necessity of wearing ANSI Z87.1 compliant eye protection, NIOSH compliant breathing protection, anti-vibration work gloves, steel-toed work boots, and a helmet.
Maintenance Features:
Regular maintenance is critical for the chainsaw's safety, longevity, and performance. The manual provides a detailed maintenance schedule and instructions:
- Fuel and Chain Oil Management:
- Use the recommended fuel mix ratio and chain oil type.
- Refill oil tank every time the fuel tank is refilled.
- Refuel in well-ventilated outdoor areas, with the engine off and cooled.
- Carefully remove fuel filler cap to release pressure.
- Check for fuel leakage during refueling and operation.
- Chain Tension Adjustment: A new chain will expand, requiring frequent tension checks and readjustments. Proper tension is when the chain does not sag but can still be turned easily by hand.
- Spark Plug Maintenance: Clean electrodes with a wire brush and reset the gap to 0.65mm as needed.
- Sprocket Inspection: Check for cracks and excessive wear; replace if worn.
- Fuel Filter Maintenance: Disassemble, wash with gasoline, or replace as needed.
- Saw Chain Maintenance:
- Replace if damaged (peeling or cracked rubber parts).
- File cutters with a specific file position and check depth gauge.
- Round off the front edge to reduce kickback risk.
- Ensure all cutters have the same length and edge angles.
- Guide Bar Maintenance:
- Reverse the bar occasionally to prevent partial wear.
- Clean saw dust from the bar groove and oiling port.
- Grease the nose sprocket.
- Check for wear of the bar rail; replace or repair if worn.
- General Inspections:
- Visually inspect the complete machine for leaks.
- Check for damaged or worn parts before each use; replace immediately.
- Inspect handle joints and guide bar mounting for loose fastenings or damage.
- Clean the air filter and cylinder fins.
- Check and clean the oil filter in the fuel tank.
- Check chain lubrication.
- Sharpen the saw chain as needed.
- Check and deburr the guide bar.
- Check and replace the chain catcher if damaged.
- Troubleshooting Guide: Provides solutions for common issues like difficulty in cold start, lack of spark, choked carburetor, and improper fuel/oil supply.
The manual stresses that maintenance intervals may need to be shortened for heavy use or difficult conditions (dusty, resin-rich wood, tropical wood, etc.) and extended for occasional use. It also highlights that repairs and part replacements should ideally be undertaken by certified and licensed technicians.
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