1. Product Overview
The Oregon 140SDEA318 Double Guard Bar is a high-quality guide bar designed for use with electric or small gasoline-powered chainsaws. It is specifically engineered for occasional woodcutting tasks, making it suitable for homeowners, campers, hunters, and other medium-use applications. Its slim, symmetrical contour contributes to its light weight and maneuverability, and its reversible design extends its usable lifespan.
This guide bar is compatible with 90-series Micro-Lite, 91 low profile chains, or 1/4"-pitch 25AP chain. It features a sprocket-nose design and is compatible with Oregon's innovative PowerSharp precision saw chain sharpening system.
Image: The Oregon 140SDEA318 Double Guard Bar, showing the Oregon logo, "Double Guard" branding, and "91" marking on the tip. This bar is designed for durability and ease of use.
2. Setup and Installation
Proper installation of the guide bar is crucial for safe and efficient chainsaw operation. Always refer to your chainsaw's specific owner's manual for detailed instructions on guide bar and chain installation, tensioning, and maintenance.
2.1 Safety Precautions
- Always wear appropriate personal protective equipment (PPE), including gloves, eye protection, and sturdy footwear, when handling chainsaw components.
- Ensure the chainsaw is turned off and the spark plug cap is disconnected (for gasoline saws) or the battery is removed (for electric saws) before beginning any installation or maintenance.
- Allow the engine and muffler to cool down if the saw has been recently operated.
2.2 Installation Steps (General)
- Prepare the Chainsaw: Remove the chain brake cover and old guide bar/chain if present. Clean any sawdust or debris from the clutch area and guide bar mounting studs.
- Position the Guide Bar: Slide the Oregon 140SDEA318 Double Guard Bar onto the mounting studs. Ensure the bar's groove aligns with the drive links of the chain.
- Install the Chain: Loop the chain around the sprocket and fit the drive links into the guide bar groove. Ensure the cutting edges of the chain are facing the correct direction (refer to your chainsaw manual).
- Replace Chain Brake Cover: Reinstall the chain brake cover, ensuring the chain tensioner pin engages with the hole in the guide bar. Hand-tighten the nuts.
- Adjust Chain Tension: Adjust the chain tension according to your chainsaw manufacturer's specifications. The chain should be snug against the bottom of the bar, but still able to be pulled freely by hand. It should not sag on the underside of the bar.
- Tighten Nuts: Once tension is set, fully tighten the bar nuts securely.
- Check Lubrication: Ensure the chainsaw's oil reservoir is filled with appropriate bar and chain oil.
This bar is known to be compatible with McCulloch and Remington saws, among others. Always verify compatibility with your specific chainsaw model.
3. Operating Instructions
This Oregon Double Guard Bar is designed for general woodcutting tasks with appropriate chainsaws. Always operate your chainsaw safely and according to its manufacturer's instructions.
3.1 General Operation Guidelines
- Pre-Operation Check: Before each use, inspect the guide bar for any damage, wear, or burrs. Ensure the chain is properly tensioned and lubricated.
- Proper Grip: Always hold the chainsaw firmly with both hands.
- Maintain Control: Be aware of kickback potential and maintain a stable stance.
- Lubrication: Ensure the chainsaw's automatic oiler is functioning correctly, providing continuous lubrication to the bar and chain during operation. Insufficient lubrication can lead to premature wear of the bar and chain.
- Cutting Technique: Allow the chain to do the work. Do not force the saw through wood.
- Bar Reversibility: To extend the life of your guide bar, periodically reverse its direction on the chainsaw. This helps to distribute wear evenly on both rails.
4. Maintenance
Regular maintenance of your Oregon guide bar will ensure optimal performance and extend its lifespan.
4.1 Daily/Before Use
- Check Oil Hole: Ensure the oil hole on the guide bar is clear of debris to allow proper lubrication.
- Inspect Rails: Check the guide bar rails for burrs or uneven wear. File down any burrs with a flat file.
- Chain Tension: Verify chain tension is correct.
4.2 Weekly/After Extended Use
- Clean Bar Groove: Remove the chain and clean the guide bar groove thoroughly to remove sawdust and debris. A bar groove cleaner tool can be helpful.
- Inspect Sprocket Nose (if applicable): If your bar has a sprocket nose, check for smooth rotation and lubricate if necessary (some sprocket noses are sealed and do not require lubrication).
- Check for Wear: Look for signs of excessive wear, bending, or cracking. Replace the bar if significant damage is present.
4.3 Chain Sharpening
This guide bar is compatible with Oregon's innovative PowerSharp precision saw chain sharpening system. Refer to the PowerSharp system's instructions for proper use. For manual sharpening, ensure your chain is sharpened regularly to maintain cutting efficiency and reduce strain on the guide bar.
5. Troubleshooting
If you encounter issues with your chainsaw's cutting performance, the guide bar may be a contributing factor. Always ensure the chainsaw itself is in good working order before troubleshooting the bar.
| Problem | Possible Cause | Solution |
|---|---|---|
| Chain binds or cuts crookedly | Uneven bar rail wear; insufficient lubrication; dull chain; incorrect chain tension. | Reverse bar direction; clean oil hole and ensure oiler works; sharpen chain; adjust chain tension. |
| Excessive heat on bar | Lack of lubrication; incorrect chain tension; dull chain. | Check oiler and oil hole; adjust chain tension; sharpen chain. |
| Rapid bar wear | Improper chain tension; lack of lubrication; dirty bar groove; cutting abrasive materials. | Adjust tension; ensure lubrication; clean groove; avoid cutting dirty wood. |
If problems persist after troubleshooting, consult a qualified service technician or contact Oregon customer support.
6. Specifications
- Model Number: 140SDEA318
- Brand: Oregon
- Bar Length: 14 inches
- Gauge: .050 inches
- Pitch: 3/8 inch Low Profile
- Chain Type Compatibility: 90-series Micro-Lite, 91 low profile chains, or 1/4"-pitch 25AP chain
- Sprocket Nose: Yes
- Recommended Saw Size: Electric or gas saws up to 2.5 cu. in (41 cc)
- Product Dimensions: Approximately 18 x 4 x 0.25 inches
- Item Weight: Approximately 15.2 ounces
- UPC: 036577007272
7. Warranty and Support
For specific warranty information regarding your Oregon 140SDEA318 Double Guard Bar, please refer to the documentation included with your purchase or contact Oregon customer support directly. Warranty terms typically cover manufacturing defects.
For additional product information, support, or to explore other Oregon products, please visit the official Oregon store:
