1. Introduction
This instruction manual provides essential information for the safe and efficient operation, setup, and maintenance of your JET 400310 3/4-inch Drive Heavy-Duty Impact Wrench. Please read this manual thoroughly before using the tool to ensure proper function and to prevent injury or damage.
The JET 400310 is designed for heavy-duty applications, delivering significant torque for fastening and loosening tasks. Its robust construction and twin hammer mechanism ensure reliable performance.
2. Safety Information
WARNING: Always follow basic safety precautions to reduce the risk of personal injury and damage to equipment.
- Read All Instructions: Familiarize yourself with the tool's operation and safety warnings before use.
- Wear Eye Protection: Always wear ANSI-approved safety goggles or a face shield.
- Wear Hearing Protection: Prolonged exposure to noise from power tools can cause hearing damage.
- Wear Hand Protection: Use appropriate gloves to protect hands.
- Secure Workpiece: Always secure the workpiece in a vise or with clamps to prevent movement.
- Maintain a Safe Work Area: Keep the work area clean, well-lit, and free from obstructions.
- Keep Children Away: Do not allow children or untrained persons to operate this tool.
- Inspect Tool Before Use: Check for damaged parts, loose connections, or any condition that may affect safe operation. Do not use if damaged.
- Disconnect Air Supply: Always disconnect the air supply before making adjustments, changing accessories, or performing maintenance.
- Use Correct Air Pressure: Do not exceed the maximum recommended air pressure for the tool.
- Avoid Accidental Starting: Ensure the trigger is in the OFF position before connecting to the air supply.
- Use Proper Accessories: Only use impact-rated sockets and accessories designed for impact wrenches.
3. Product Features and Components
The JET 400310 impact wrench is engineered for durability and performance. Key features include:
- Twin Hammer Impact Mechanism: Provides high torque output with smooth, balanced impact blows, reducing vibration.
- Forward and Reverse Valve: Offers three forward settings and one reverse setting for precise control.
- Handle Exhaust: Directs exhaust air away from the operator for enhanced comfort.
- Insulating Rubber Handle Cover: Enhances operator comfort and safety by providing a secure grip and reducing vibration.
- Steel Hammer Case: Offers superior protection for internal components.
- Three-Piece Construction: Facilitates quick and easy maintenance.
- Anvil with Snap Ring and Pin Hole: Ensures secure socket retention.
- Air Inlet Screen: Protects the motor from debris, extending tool life.
- 3/8-Inch High Flow Female Quick Coupler: For efficient air connection.
Figure 1: JET 400310 3/4-inch Drive Heavy-Duty Impact Wrench. This image shows the complete impact wrench, highlighting its robust design, handle, trigger, and anvil.
4. Technical Specifications
| Specification | Value |
|---|---|
| Model Number | 400310 |
| Drive Size | 3/4 inch |
| Maximum Torque | 1,000 ft/lbs (as per product description) |
| Impact Mechanism | Twin Hammer |
| Forward Settings | 3 |
| Reverse Settings | 1 |
| Air Inlet | 3/8-inch high flow female quick coupler |
| Material | Alloy Steel, Rubber |
| Item Weight | 4.97 kg |
| Product Dimensions | 26.49 x 26.11 x 11.1 cm |
| Power Source | AC (This seems incorrect for an air tool, assuming pneumatic) |
| Head Style | Fixed Square |
| Finish | Polished |
Note: The "Power Source: AC" specification appears to be a data entry anomaly for a pneumatic tool. This tool operates on compressed air.
5. Setup and Connection
- Air Supply: Ensure you have a clean, dry, regulated air supply capable of delivering sufficient CFM (Cubic Feet per Minute) at the recommended operating pressure for heavy-duty impact wrenches.
- Air Hose Connection: Connect a 3/8-inch high-flow air hose to the tool's air inlet. Ensure all connections are secure to prevent air leaks.
- Lubrication: Before first use, and regularly thereafter, add a few drops of pneumatic tool oil into the air inlet. This lubricates internal components.
- Socket Attachment: Select the appropriate impact-rated socket for your application. Align the socket with the 3/4-inch square drive anvil and push it firmly until it locks into place with the snap ring and pin hole retainer.
- Pressure Regulation: Set your air compressor regulator to the recommended operating pressure for the tool. Do not exceed the maximum pressure.
6. Operating Instructions
- Direction Control: The forward and reverse valve is located near the trigger.
- To select Forward (tightening), move the valve to one of the three forward positions. These positions typically offer varying power levels.
- To select Reverse (loosening), move the valve to the single reverse position.
- Power Adjustment: The three forward settings allow for adjustment of torque output. Start with a lower setting for initial tightening or when working with sensitive materials, and increase as needed. The reverse setting typically provides full power for loosening.
- Applying the Tool:
- Ensure the socket is securely attached to the fastener.
- Hold the tool firmly with both hands, maintaining a balanced stance.
- Press the trigger to activate the impact mechanism. Apply steady pressure to the tool.
- Release the trigger to stop operation.
- Tightening Fasteners: For critical applications requiring specific torque, use a calibrated torque wrench for final tightening after using the impact wrench for initial fastening.
- Loosening Fasteners: The reverse setting provides maximum power for breaking loose stubborn fasteners.
7. Maintenance
Regular maintenance ensures the longevity and optimal performance of your impact wrench.
- Daily Lubrication: Add 5-10 drops of high-quality pneumatic tool oil into the air inlet before each use, or at least daily if used frequently. This is crucial for the twin hammer mechanism and motor.
- Air Inlet Screen: Periodically inspect and clean the air inlet screen to prevent debris from entering the motor, which can extend tool life.
- Cleaning: Keep the tool clean and free of dirt, grease, and debris. Use a clean cloth. Do not use harsh solvents that could damage rubber components.
- Anvil Inspection: Regularly check the anvil and socket retainer for wear or damage. Replace if necessary to ensure secure socket attachment.
- Air Supply Quality: Ensure your air compressor system includes an air filter and water trap to provide clean, dry air to the tool.
- Storage: When not in use, store the impact wrench in a clean, dry place, away from excessive heat or moisture. Disconnect from the air supply.
- Rubber Handle Cover: Inspect the insulating rubber handle cover for wear or damage. A replacement cover (part number 905125) is available if needed.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Tool does not operate or operates weakly. | Low air pressure; insufficient air supply (CFM); clogged air inlet screen; lack of lubrication; worn internal parts. | Check air compressor pressure and capacity; clean air inlet screen; add pneumatic tool oil; inspect for internal wear (professional service recommended). |
| Excessive vibration. | Worn internal components; unbalanced socket. | Inspect internal mechanism (professional service recommended); ensure socket is correctly seated and not damaged. |
| Air leaks from tool. | Loose fittings; damaged O-rings or seals. | Tighten all air connections; replace damaged seals or O-rings (professional service recommended). |
| Difficulty changing direction. | Debris in valve mechanism; lack of lubrication. | Clean valve area; lubricate tool. |
9. Warranty and Support
JET tools are manufactured to high standards and are backed by a limited warranty. For specific warranty details, claims, or technical support, please refer to the official JET website or contact their customer service department.
When contacting support, please have your tool's model number (400310) and serial number (if applicable) readily available.
For further assistance, you may visit the official JET store page: JET Official Store
