1. Introduction and Product Overview
The Snap-On MG1250 is a robust 3/4 Drive Heavy Duty Impact Wrench designed for demanding applications, including servicing large equipment and tires on mid-sized fleet vehicles. This tool delivers significant torque, ensuring efficient and reliable performance. Its design prioritizes durability, user comfort, and operational efficiency.
Key features include a powerful twin-hammer impact mechanism, a six-vane rotor for rapid motor startup, and sealed-in oil bath lubrication for extended tool life. The lightweight one-piece housing reduces user fatigue, while the anvil-stop feature enhances safety by preventing socket and fastener ejection upon trigger release.
Figure 1: Snap-On MG1250 3/4 Drive Heavy Duty Impact Wrench. This image displays the robust construction and ergonomic design of the tool, featuring its distinctive red and black finish.
2. Safety Information
Always adhere to the following safety guidelines when operating the Snap-On MG1250 Impact Wrench to prevent injury and tool damage.
- Eye Protection: Always wear ANSI-approved safety glasses or goggles to protect against flying debris.
- Hearing Protection: Use ear protection to prevent hearing damage from prolonged exposure to noise.
- Hand Protection: Wear appropriate gloves to protect hands from vibration and potential pinch points.
- Secure Workpiece: Ensure the workpiece is stable and securely fastened before applying torque.
- Proper Air Supply: Connect the tool to a clean, dry air supply at the recommended pressure. Do not exceed the maximum operating pressure.
- Inspect Tool: Before each use, inspect the tool for any damage, loose parts, or air leaks. Do not use a damaged tool.
- Correct Sockets: Use only impact-rated sockets that are in good condition and correctly sized for the fastener.
- Avoid Over-tightening: While powerful, avoid over-tightening fasteners, which can lead to damage to the fastener, workpiece, or tool.
- Keep Clear: Keep hands, hair, and loose clothing away from moving parts.
- Disconnect Air: Always disconnect the air supply before changing accessories, performing maintenance, or when the tool is not in use.
3. Setup
Proper setup ensures optimal performance and safety of your MG1250 Impact Wrench.
- Air Supply Connection:
- Ensure your air compressor is capable of providing sufficient airflow (CFM) and pressure (PSI) for the tool.
- Connect an air hose to the tool's air inlet. It is recommended to use an air filter/regulator/lubricator (FRL) unit in the air line to ensure clean, regulated, and lubricated air.
- Set the air pressure regulator to the recommended operating pressure (refer to specifications).
- Socket Attachment:
- Select the appropriate 3/4 inch drive impact-rated socket for your fastener.
- Push the socket firmly onto the square drive anvil until it locks securely in place. Ensure the socket is fully seated.
- Initial Lubrication Check: The tool features sealed-in oil bath lubrication. No initial lubrication is typically required, but ensure the tool has not been stored in a way that could compromise the seal.
4. Operating Instructions
Follow these steps for effective and safe operation of your impact wrench.
- Direction Selection:
- The MG1250 features a convenient one-hand reverse button. Locate the direction selector switch, typically near the trigger.
- Push the switch to the desired position for either forward (tightening) or reverse (loosening) rotation.
- Applying the Tool:
- Place the socket squarely onto the fastener.
- Hold the tool firmly with both hands, if possible, to control torque reaction.
- Trigger Operation:
- Depress the trigger gradually to start the tool. The speed and power will increase as the trigger is pressed further.
- For tightening, apply short bursts of power to avoid over-tightening. Final torque should be checked with a calibrated torque wrench.
- For loosening, apply continuous power until the fastener breaks free.
- Anvil-Stop Feature: The anvil-stop feature is designed to prevent the anvil from throwing sockets and fasteners after releasing the trigger. This enhances safety during operation.
5. Maintenance
Regular maintenance ensures the longevity and optimal performance of your Snap-On MG1250 Impact Wrench.
- Lubrication: The MG1250 features a sealed-in oil bath lubrication system, pre-filled with RED LINE Synthetic Oil. This system provides continuous lubrication and typically requires no user intervention for lubrication. Do not attempt to open the sealed mechanism unless performing authorized service.
- Cleaning:
- After each use, wipe down the tool with a clean, dry cloth to remove dirt, grease, and debris.
- Keep the air inlet screen clean to ensure proper airflow.
- Air Line Maintenance: Regularly drain moisture from your air compressor tank and check the air filter in your FRL unit. Replace filter elements as needed to ensure clean, dry air reaches the tool.
- Hose and Fittings: Inspect air hoses and fittings for wear, cuts, or leaks. Replace damaged components immediately.
- Storage: Store the impact wrench in a clean, dry environment when not in use. Disconnect it from the air supply.
6. Troubleshooting
If you encounter issues with your MG1250 Impact Wrench, refer to the following common problems and solutions.
| Problem | Possible Cause | Solution |
|---|---|---|
| Loss of power or slow operation | Low air pressure or insufficient airflow Clogged air filter Worn internal components | Check compressor pressure and CFM output. Adjust regulator. Clean or replace air filter. Contact authorized service center. |
| Air leaks | Loose fittings or connections Damaged O-rings or seals | Tighten all connections. Inspect and replace damaged seals or O-rings. |
| Tool not operating | No air supply Direction selector in neutral position Internal blockage or damage | Ensure air supply is connected and turned on. Set direction selector to forward or reverse. Contact authorized service center. |
For issues not listed above or if solutions do not resolve the problem, please contact Snap-On customer support or an authorized service center.
7. Specifications
Below are the technical specifications for the Snap-On MG1250 3/4 Drive Heavy Duty Impact Wrench:
- Model Number: MG1250
- Drive Size: 3/4 inch
- Maximum Torque: 1,200 ft-lb
- Operation Mode: Pneumatic
- Item Weight: Approximately 8.1 lb (3.67 kg)
- Item Length: 8 Inches (20.32 cm)
- Material: Metal
- Mechanism: Twin-Hammer
- Lubrication: Sealed-in Oil Bath (RED LINE Synthetic Oil)
- Manufacturer: Snap-On
- Part Number: MG1250
- UPC: 635133720183
8. Warranty and Support
The Snap-On MG1250 Impact Wrench comes with an improved, more durable impact mechanism, allowing Snap-On to offer a 2-Year Warranty.
For warranty claims, technical support, or service inquiries, please contact your authorized Snap-On dealer or visit the official Snap-On website for customer service contact information. Ensure you have your model number (MG1250) and proof of purchase available when seeking support.
