This document is an operation manual for the POWERKING gasoline chain saw, covering models PK4516, PK4520, PK451620, PK5718, PK5722, and PK571822. It provides comprehensive information on safety, operation, maintenance, and technical specifications to ensure prolonged service life and good operating condition.
Function Description
The POWERKING gasoline chain saw is designed for cutting wood and other wooden products. It is explicitly stated that the machine must not be used to cut metal rods, metal plates, plastic, or other non-woody materials. The chain saw is a professional-grade tool, and its proper use is critical for safety and performance.
Important Technical Specifications
The manual details specifications for two main series: PK4516/PK4520/PK451620 (45cc) and PK5718/PK5722/PK571822 (57cc).
General Dimensions and Weight:
- Size: 43x26x29 cm for both series.
- Weight: 5.6 kg for the 45cc series, 5.7 kg for the 57cc series.
Fuel and Lubrication:
- Fuel Tank Volume: 0.5 L for 45cc models, 0.7 L for 57cc models.
- Oil Tank Volume: 0.24 L for both series.
- Fuel Type: Unleaded gasoline of 90# or above.
- Lubricating Oil: Oil with a mixing ratio specified by Powerking or 2T oil of Class FB or above. The mixing ratio for gasoline and oil is 40:1.
- Chain Lubrication: Variable-flow automatic oil pump. The oil pump capacity is approximately 7ml/min at an engine speed of 7,000rpm. SAE30 oil is recommended for summer, and SAE10 for winter or cutting resinous trees.
Saw Chain and Guide Plate:
- Pitch: 0.325 Cun for both series.
- Intermediate Guide Tooth Thickness: 1.47 mm for both series.
- Guide Plate Size: 16/20 Cun for 45cc models, 18/22 Cun for 57cc models.
- Chain Section Number: 66/76 Section for 45cc models, 72/86 Section for 57cc models.
- Sprocket Tooth Number: 7 for both series.
Engine:
- Engine Type: Air-cooled two-stroke single-cylinder engine.
- Start Mode: Recoil start.
- Engine Displacement: 45cc for the lower power series, 57cc for the higher power series.
- Maximum Output Power: 1.8 kw for 45cc models, 2.5 kw for 57cc models.
- Maximum Operating Speed: 11500±500 r/min for both series.
- Idle Speed: 3050±350 r/min for both series.
- Other Devices: Front baffle, chain stop, brake system, and damping device.
Usage Features
The manual emphasizes several key usage features and safety precautions:
Safety Precautions:
- Read Manual: Operators must carefully read and understand the entire manual before use.
- Physical Condition: Do not operate the chain saw under the influence of alcohol, drugs, or when tired or sick. Operators must be in good physical and mental condition.
- Protective Equipment: Essential protective gear includes a helmet (especially when working under trees), earmuffs for hearing protection, heavy and non-slip labor protection gloves, and complete labor protection shoes or boots with non-slip soles. Loose clothing, scarves, lacing, ties, bracelets, necklaces, and other jewelry are prohibited.
- Two-Hand Operation: The chain saw must always be operated with both hands to maintain control and prevent injury.
- Kickback Prevention: Operators must be aware of kickback (bounce) and take preventive measures. High-speed cutting can reduce kickback, and the front part of the guide plate should not contact objects.
- Fuel Handling: Gasoline and oil are highly flammable. Refueling must be done outdoors, away from open flames and sparks, with the engine off and cool. Fuel containers must be approved and tightly sealed.
- Starting the Engine: The chain saw should be started at least 3m away from the refueling point. Bystanders and animals must be kept clear. The working area must be clean, and a safe retreat route planned. The chain brake must be activated before starting.
- Cutting Operations: Do not cut branches higher than the chest. Avoid cutting on ladders. The chain saw is only for wood; do not cut metal or plastic. When cutting logs on slopes, stand uphill.
- Chain Brake: The chain brake is a crucial safety feature to stop chain rotation in case of kickback. Its effectiveness should be checked before each use.
Operational Steps:
- Installation: Guide plate and chain installation involves loosening the nut, removing the right side plate, sliding the guide plate towards the clutch, installing the chain in the correct direction, releasing the chain brake, and then reassembling and tightening the components.
- Chain Tension: Proper chain tension is critical. It should be adjusted when the machine is cool, with gloves worn. The chain should be tight enough to be pulled by hand along the guide plate but not excessively tight.
- Starting Procedure (Cold Start): Fill fuel and oil tanks, press the front baffle forwards (activating the chain brake), put the stop switch in the upper position, pull out the choke valve pulling rod, pull the starter handle several times until ignition sound, then push in the choke rod and pull the starter handle again until the engine starts.
- Stopping Procedure: Loosen the throttle to idle speed, then set the stop switch to the stop position. If the engine doesn't stop, pull out the choke valve pulling rod.
- Cutting Guidance: The manual provides detailed guidance on tree cutting, branch cutting, and tree sawing, including techniques for felling trees (forming a gap, sawing from the opposite direction), handling pulled and pressed timber, and preventing bounce.
Maintenance Features
Regular maintenance is essential for the chain saw's performance and longevity. The manual provides a maintenance schedule:
Before Each Use:
- Air Filter: Check/clean/replace.
- Fuel Filter: Check/clean/replace.
- Spark Plug: Check/clean/adjust/replace.
- Carburetor: Adjust/replace.
- Cylinder Cooling Fins: Check/clean.
- Muffler: Check/fasten/clean.
- Oil Filter: Check/clean/replace.
- Chain Brake: Check/replace.
- Start Rope: Check/replace.
- Guide Plate: Check/clean.
- Fuel Supply System: Check/repair.
- Screws/Bolts/Nuts: Check/fasten/replace.
On a Monthly Basis:
- All "Before Each Use" checks should be performed.
Specific Maintenance Tasks:
- Carburetor Adjustment: The manual provides specific settings for low-speed mixing regulator (L), high-speed mixing regulator (H), and idle-speed regulator (T). The idle-speed regulator must be adjusted so the chain does not rotate before starting.
- Air Filter: Clean dust with high-pressure air or replace.
- Fuel Supply System: Check for leaks in the fuel pipe, sealing plug, and fuel tank. Clean the fuel tank if dust is present.
- Oil Filter: Clean the oil filter screen with gasoline if dirty. Clean the oil tank if dirt is present.
- Guide Plate: Clean the groove with a screwdriver and the oil hole with thin iron wire. Reverse the guide plate regularly to ensure even wear. Replace if worn.
- Clutch Shell: Replace if worn 0.5mm or more to prevent chain damage.
- Spark Plug: Check regularly. The standard gap is 0.6-0.7mm. Correct if outside this range. Tightening torque: 15-17N.m.
- Magneto: Check for firm wire connection.
- Cylinder Cooling Fins: Clean dust and dirt to ensure proper engine cooling.
- Chain Grinding: The manual provides detailed instructions for grinding the chain, including specific angles (30-degree top, 80-degree lateral, 60-degree cutting) and depth measurement (0.64mm). It warns against using blunt or damaged chains and emphasizes wearing protective gloves and shutting down the engine during grinding.
- Long-term Storage (more than 30 days): Clean the machine, discharge all fuel, remove the spark plug, add lubricating oil to the cylinder, and cover the guide plate and chain with a sleeve.
The manual also includes a "Faults and Troubleshooting" section to help diagnose and resolve common issues, such as the engine not starting or not stopping, and problems with fuel or lubrication. It stresses that complex repairs should be handled by competent personnel.
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