The YOKOTA YETC-210EA-L is an impulse wrench designed for tightening processes on threaded fasteners. This manual provides essential information for its installation, operation, maintenance, and safety.
Function Description
The YETC-210EA-L is a pneumatic impulse wrench, meaning it operates using compressed air. It is designed to deliver controlled torque for tightening threaded fasteners efficiently and accurately. The tool is part of an air system that includes a compressor, main pipe, branch pipe, shut-off valve, filter, regulator, oiler, and coupler, all working together to supply clean, regulated, and lubricated air to the tool. The air system is crucial for the tool's performance and longevity, ensuring that the air supplied is free from contaminants and at the correct pressure. The oiler, in particular, is vital for lubricating the internal components of the tool, which helps to reduce wear and maintain optimal operation.
Important Technical Specifications
- Brand: Yokota
- Product: Impulse Wrenches
- Type: YETC-210EA-L
- Safety Standard: EN ISO 11148-6
- Power Supply (V): AC 100~240V, 50/60Hz (This specification seems to refer to an external power supply for a related system, as the tool itself is pneumatic. The manual primarily focuses on the pneumatic system for the tool's operation.)
- Dimensions:
- Height (H): 105 mm
- Width (W): 230 mm
- Depth (D): 290 mm
- Air Pressure: The air pressure at the inlet of the tool during running should be a maximum of 6.3 bar. Operating above this pressure can cause unnecessary wear and damage. Below 5.5 bar, power loss will occur, and excessively low pressure can also lead to additional wear/damage.
- Air Quality: The compressed air must be clean and dry, ideally assured by an air filter. The use of a complete FRL (filter, regulator, lubricator) unit is recommended.
- Oiler Adjustment: The oiler should be adjusted to deliver approximately 3 to 6 droplets per minute.
- Air Hose Length: The air hose between the oiler and the tool should not exceed 6 to 8 meters.
- Hose Diameter: It is crucial that the quick coupler and hose have a sufficient diameter. The hose should be as thick as possible, but never too small.
Usage Features
Before using the YETC-210EA-L, operators must read and understand the manual. Only qualified and trained personnel should install, adjust, or use the tool.
- Initial Lubrication: Before first use, or after a long period of disuse, fill some droplets of resin and acid-free oil into the air inlet and let the tool run freely for a few seconds. Red Rooster air tool oil (Order no. Atlub) is recommended.
- Air System Setup: Ensure the air system components (hose, quick coupler) are clean by letting air run freely through them before connecting to the tool. The hose and quick coupler must have sufficient diameter.
- Safety Precautions:
- Do not modify the tool.
- Ensure the manual is accessible to all relevant personnel.
- Prevent projectiles during operation by securely fixing the workpiece and correctly mounting the inserted tool/accessory.
- Wear safety glasses, suitable gloves (especially for rotating accessories), and ear protection.
- Keep fingers and body parts away from the inserted tool/accessory and rotating parts.
- Never hold the drive shaft, socket, bit, or inserted tool/accessory while rotating.
- For impact and impulse wrenches, use only impact sockets.
- Avoid loose clothing or long hair that could get entangled.
- Keep the workplace clean and organized to prevent tripping hazards.
- Do not use the tool in hazardous areas or where it might contact electric power.
- Divert cold exhaust air away from hands and body.
- Never direct exhaust air at yourself or others.
- Do not use quick-change couplings directly on the air inlet; assemble at least 50 cm of air hose with a shock-resistant hose joint.
- If universal twist couplings are used, ensure lock pins are mounted.
- Do not exceed the maximum indicated air pressure.
- Never carry the tool by the air hose.
- Use a safety helmet for overhead work.
- Be aware that the workpiece, inserted tool, or accessory may get hot, causing burns.
- Use only air hoses designed for the specified air pressure and "safety quick change couplers."
- Accessory Use: Only use accessories and consumables designated for this tool by the manufacturer. Select accessories that provide the lowest possible noise and vibration. Replace them if noise or vibration increases. Avoid worn or ill-fitting impact sockets. Ensure the inserted tool/accessory is properly held by the retainer and that the retainer is in good condition. Never use the tool without a retainer.
- Operator Awareness: Be familiar with the workplace and surrounding area. Be prepared for normal/abnormal movements/forces. Maintain balance and secure footing. Release the lever/trigger if the air supply is interrupted. Seek medical advice if experiencing persistent discomfort or pain from using the tool.
Maintenance Features
Regular maintenance is crucial for the tool's longevity and performance.
- Regular Checks: Periodically check the tool for loose bolts, screws, or parts.
- Power Loss: If power loss occurs, the tool should be repaired by trained and qualified engineers.
- Silencer: If the tool has a silencer, ensure it is working properly and replace it if damaged.
- Disposal: When disposing of the tool, follow local regulations for recycling. Do not discard it in normal waste bins.
- Air Quality System: The air filter, regulator, and oiler (FRL unit) are essential for maintaining the quality of compressed air. The oiler needs regular adjustment to ensure proper lubrication. In cases where a centralized oiler is used, oil consumption can be reduced significantly.
- Storage: If the tool will not be used for an extended period, it must be oiled by filling droplets of resin and acid-free oil into the air inlet and running the tool for a few seconds.
Intended Use
The YETC-210EA-L is specifically designed for tightening processes on threaded fasteners. Any use outside of this intended purpose requires a risk assessment by the employer/user. Damages resulting from not following the manual, incorrect use, or improper repairs are not covered by the warranty. The manufacturer reserves the right to implement technical improvements without prior notification.
Warranty
The warranty period is 12 months from the date of purchase for Yokota, Toku, and Red Rooster tools, and 3 months for spare parts repaired by the manufacturer. The warranty covers material or construction defects. Repairs or parts replacement by an official Yokota/Red Rooster service workshop are free of charge if the tool is under warranty. Freight or postage costs are borne by the buyer. Damage due to normal wear, overloading, or incorrect use is excluded. Claims for loss of production or other damages are also excluded. Warranty repairs require the tool to be in its original state and accompanied by a copy of the purchase invoice. All warranty claims must be made through the dealer who supplied the tool.
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