A dull blade clutch can cause your DR brush mower to perform poorly. Fortunately, you can easily burnish the blade clutch to restore its performance. Here’s a step-by-step guide on how to do it. Before you begin, make sure you have the proper safety gear, including gloves, safety glasses, and hearing protection. You will also need a wire brush, a burnishing compound, and a rag.
First, remove the blade clutch from the mower. This is typically done by removing a few bolts. Once the blade clutch is removed, clean it with the wire brush to remove any dirt or debris. Next, apply a small amount of burnishing compound to the clutch. Use a rag to rub the compound into the clutch in a circular motion. Continue rubbing until the clutch is shiny and smooth. Finally, reinstall the blade clutch on the mower and tighten the bolts. Your blade clutch is now burnished and ready to use.
In conclusion, burnishing the blade clutch on your DR brush mower is a simple process that can improve the performance of your mower. By following these steps, you can easily burnish the blade clutch and get your mower back to work in no time.
Safety First: Essential Precautions
When burnishing the blade clutch on your Dr. Brush Mower, safety should be your top priority. Here are some essential precautions to take before starting the process:
Personal Protective Equipment (PPE)
Wear appropriate PPE, including:
- Safety glasses to protect your eyes from flying debris
- Work gloves to protect your hands from cuts and abrasions
- Hearing protection to minimize noise exposure
- Mask or respirator to prevent inhalation of dust and fumes
Machine Preparation
Ensure the mower is parked on a stable surface and the engine is turned off. Disconnect the spark plug wire to prevent accidental starting.
Work Area Safety
Choose a well-ventilated area for the burnishing process. Clear the work area of any flammable materials or obstructions.
Equipment Inspection
Inspect the blade clutch and surrounding components for any damage or wear. If any issues are found, address them before proceeding.
Emergency Preparedness
Have a fire extinguisher nearby in case of any unexpected emergencies.
Inspecting the Blade Clutch Assembly
Before attempting to burnish the blade clutch, it’s crucial to thoroughly inspect the assembly to identify any potential underlying issues that may require attention. Here’s a detailed step-by-step guide to assist you in this process:
- Safety First: Disconnect the spark plug to prevent accidental starting and ensure your safety.
- Remove the Blade: Using a suitable wrench, carefully remove the blade from the blade clutch.
- Check the Clutch Components: Inspect the clutch assembly for any signs of damage or wear. Examine the clutch shoes, springs, and any other components for any cracks, distortions, or excessive wear. If any issues are identified, replace the damaged components before proceeding.
- Clean and Degrease: Clean the clutch assembly thoroughly using a degreaser and a clean cloth. Remove any residual dirt, grease, or oil that may impede proper functioning.
- Inspect the Bearing: Check the bearing located within the clutch assembly for any signs of wear or damage. If the bearing is worn or damaged, it’s essential to replace it before continuing with the burnishing process.
- Measure Clutch Clearance: Using a feeler gauge, measure the clearance between the clutch shoes and the clutch drum. The ideal clearance should be within the manufacturer’s specifications. Adjust the clutch shoes as necessary to achieve the correct clearance.
- Reassemble and Test: Reassemble the blade clutch assembly carefully, ensuring all components are properly aligned and tightened. Reconnect the spark plug and test the clutch operation by engaging and disengaging the blade.
Disassembling the Blade Clutch Assembly
To disassemble the blade clutch assembly, follow these steps:
- Remove the blade cover from the lawnmower deck.
- Loosen the blade bolt and remove the blade washer and blade.
- Carefully lift the blade clutch assembly off the crankshaft.
While lifting the blade clutch assembly off the crankshaft, pay attention to the orientation of the components. The assembly must be reassembled in the same orientation to ensure proper operation and safety.
STEP ACTION 1 Place the blade clutch assembly on a clean surface and inspect it for any damage. 2 Using a wrench, loosen the bolts or screws that hold the clutch assembly together. 3 Carefully separate the components of the clutch assembly, including the clutch springs, clutch shoes, and pressure plate. - Inspect the blade clutch assembly for wear or damage.
Burnishing the Clutch Components
Burnishing is a crucial step in restoring the original performance of your Dr Brush Mower’s blade clutch. This process involves removing any glazing or wear on the clutch components, ensuring smooth engagement and reliable power transmission.
Disassembling the Clutch Components
To begin, disassemble the blade clutch by removing the recoil starter and the outer clutch housing. Carefully extract the components, including the clutch shoes, pressure plate, and springs.
Cleaning the Components
Thoroughly clean all the clutch components using a cleaning solvent and a soft brush. Remove any dirt, grease, or debris that may obstruct the proper functioning of the clutch.
Sanding the Clutch Shoes
Gently sand the surfaces of the clutch shoes using fine-grit sandpaper (around 220-grit). Hold the sandpaper flat and avoid applying excessive pressure, as it can damage the shoes.
Resurfacing the Pressure Plate
Place the pressure plate on a flat surface and use a light-duty sanding paper to remove any glazing or rust. Ensure that the surface is smooth and free of any imperfections.
Inspecting the Springs
Carefully inspect the clutch springs for any signs of damage or distortion. Replace any weakened or broken springs to maintain proper clutch engagement.
Lubricating the Components
Apply a thin layer of high-temperature grease to the friction surfaces of the clutch shoes and the pressure plate. This lubrication will reduce wear and ensure smooth operation.
Reassembling the Clutch
Reassemble the clutch components in the reverse order of disassembly. Ensure that all parts are properly aligned and tightened to the specified torque. Install the outer clutch housing and recoil starter.
Testing the Clutch
After reassembling the clutch, test its functionality by pulling the recoil starter cord. Pay attention to the smoothness of engagement and the power transmission to the blade. Make any necessary adjustments until the clutch operates flawlessly.
Tightening and Torquing the Components
To ensure proper operation of the blade clutch, it is crucial to correctly tighten and torque its components. Here are the steps involved in this process:
1. Place the Dr. Brush Mower on a level surface.
2. Disconnect the spark plug wire to prevent accidental starting.
3. Remove the five bolts that secure the blade clutch cover using a wrench.
4. Inspect the clutch assembly for any signs of wear or damage.
5. Clean the clutch components with a degreaser.
6. Apply a thin layer of anti-seize lubricant to the clutch components.
7. Reassemble the clutch components in the reverse order of disassembly.
8. The following table provides the recommended tightening torques for the blade clutch components:
| Component | Tightening Torque (ft-lbs) |
|---|---|
| Clutch Drum Bolt | 45-50 |
| Clutch Shoe Bolt | 12-15 |
| Blade Bolt | 20-25 |
9. Ensure that all components are securely fastened by double-checking the tightness of the bolts.
10. Reconnect the spark plug wire.
11. Test the operation of the blade clutch by engaging and disengaging it several times.
Testing the Blade Clutch Engagement
Begin by raising the deck to its highest position for safety. Next, locate the blade clutch lever, typically situated on the handlebar or the side of the mower body. Push the lever forward to engage the clutch and pull it back to disengage.
With the blade clutch engaged, start the engine and let it idle. If the blade clutch is functioning correctly, you should hear the blade spinning. To check further, slowly engage the throttle. If the blade speed increases along with the throttle, the clutch is properly engaged.
Disengage the blade clutch and observe the blade. It should stop rotating immediately. If the blade continues to spin, there is an issue with the clutch or blade brake. Inspect the clutch components and ensure that the blade brake is not worn or damaged.
Additional Tips for Testing Blade Clutch Engagement
- Check the clutch cable for any fraying, kinking, or damage. Replace the cable if necessary.
- Inspect the clutch pulley for wear or damage. Replace the pulley if it is worn or cracked.
- Clean any dirt or debris from the clutch components to ensure proper operation.
Troubleshooting Blade Clutch Engagement Problems
| Symptom | Possible Cause | Solution |
|---|---|---|
| Blade does not spin when clutch is engaged | Faulty clutch lever | Replace the clutch lever |
| Blade spins continuously even when clutch is disengaged | Worn or damaged blade brake | Replace the blade brake |
| Blade engages erratically or slips | Damaged clutch pulley | Replace the clutch pulley |
Inspection and Cleaning
Regularly inspect the burnished clutch for signs of wear or damage. Clean the clutch thoroughly using a degreaser and a stiff brush. Inspect the clutch for any cracks or chips, as these can indicate a need for replacement.
Lubrication
Lightly lubricate the burnished clutch with a high-temperature grease specifically designed for clutch applications. Avoid over-lubrication, as excess grease can attract dirt and debris.
Adjustment
Ensure that the burnished clutch is properly adjusted according to the manufacturer’s specifications. Improper adjustment can lead to premature wear or clutch failure.
Replacement
If the burnished clutch is worn or damaged beyond repair, it must be replaced. Use only genuine replacement parts to ensure compatibility and optimal performance.
Maintaining the Burnished Clutch for Optimal Performance
Storage
When storing the Dr Brush Mower, remove the burnished clutch and store it in a dry, clean place. Avoid exposing the clutch to moisture or extreme temperatures.
Break-In Period
After replacing the burnished clutch, follow the recommended break-in period as outlined in the manufacturer’s guidelines. This allows the clutch to properly seat and adjust to the new components.
Clutch Engagement
When engaging the clutch, do so gradually to avoid shock loading and excessive wear. Allow the clutch to fully engage before applying full power to the brush mower.
Slippage Monitoring
Monitor the burnished clutch for any signs of slippage. Excessive slippage can indicate worn or improperly adjusted clutch components and should be addressed promptly.
Heat Management
Avoid prolonged or excessive use of the burnished clutch, as this can lead to overheating and premature wear. Allow the clutch to cool down periodically to extend its lifespan.
Recommended Lubrication Frequency
The recommended lubrication frequency for the burnished clutch varies depending on the operating conditions. Consult the manufacturer’s guidelines for specific intervals.
| Operating Conditions | Recommended Lubrication Frequency |
|---|---|
| Regular use in dusty or abrasive environments | Every 20-30 hours of operation |
| Light or infrequent use in clean environments | Every 50-100 hours of operation |
How to Burnish Blade Clutch on DR Brush Mower
Burnishing the blade clutch on your DR Brush Mower is an important maintenance procedure that helps to ensure optimal performance and extend the life of the clutch. Follow these steps to burnish the clutch properly:
- Remove the blade: Disconnect the spark plug wire and wear safety glasses. Remove the blade bolt and washer, then carefully lift the blade off the clutch.
- Clean the clutch: Use a wire brush or compressed air to remove any dirt or debris from the clutch surface.
- Apply burnishing compound: Apply a thin layer of burnishing compound to the clutch surface. Use a clean cloth or brush to distribute the compound evenly.
- Reinstall the blade: Place the blade back on the clutch and secure it with the bolt and washer. Tighten the bolt to the specified torque.
- Engage the clutch: Start the engine and engage the clutch by moving the lever or switch. Let the clutch slip for a few seconds, then disengage it.
- Repeat steps 4-5: Engage and disengage the clutch several times to allow the compound to burnish the clutch surface properly.
After burnishing, the clutch should operate smoothly and engage and disengage properly. If you experience any problems with the clutch, consult your owner’s manual or contact a qualified mechanic.
People also ask about How to Burnish Blade Clutch on DR Brush Mower
What is the purpose of burnishing the blade clutch?
Burnishing the clutch helps to create a smooth and uniform surface on the clutch, which reduces friction and wear. This prolongs the life of the clutch and improves its performance.
How often should I burnish the blade clutch?
The frequency of burnishing depends on the usage of the brush mower. As a general rule, it is recommended to burnish the clutch every 25-50 hours of operation.
Can I use any burnishing compound?
No, it is important to use a burnishing compound specifically designed for blade clutches. Using the wrong compound can damage the clutch.
What are the signs of a worn blade clutch?
Signs of a worn blade clutch include slipping, chattering, or difficulty engaging or disengaging. If you notice any of these symptoms, it is important to have the clutch inspected and replaced if necessary.
