Hewitt Robins Model 3654 Crusher: A Comprehensive Guide

[MikePhua]

The Hewitt Robins Model 3654 Crusher is a key piece of equipment in the aggregate production and mining industries. Known for its rugged design and reliability, the 3654 crusher is often used in heavy-duty operations, processing materials such as limestone, gravel, and granite. In this article, we will explore the key features, maintenance requirements, troubleshooting tips, and best practices for optimizing the performance of the Hewitt Robins 3654 Crusher.
Key Features of the Hewitt Robins Model 3654 Crusher
The Hewitt Robins Model 3654 Crusher is a part of the company's legacy of producing durable and efficient equipment for the mining and construction industries. Below are some of the key specifications and features that make this crusher a preferred choice in heavy-duty applications:

• Crusher Type: Jaw Crusher – The 3654 is a primary jaw crusher, known for its ability to crush large amounts of hard materials efficiently.
  
• Feed Opening: The crusher is designed with a 36-inch by 54-inch feed opening, which allows for handling large materials, making it suitable for high-capacity operations.
  
• Capacity: The model is capable of processing up to 300 tons of material per hour, depending on the type and hardness of the material being processed.
  
• Design: The 3654 features a heavy-duty frame and a robust mechanism that reduces wear and tear during operation. This makes it suitable for extended operation in tough environments.
  
• Application: Ideal for use in quarries, mines, and aggregate production, the Hewitt Robins 3654 Crusher is typically used for primary crushing of materials.
  

Routine Maintenance for Hewitt Robins Model 3654 Crusher
Regular maintenance is essential to keep the Hewitt Robins Model 3654 Crusher operating at optimal efficiency. Routine checks and maintenance tasks help prevent unexpected breakdowns and extend the life of the crusher. The following are key maintenance practices:
1. Checking and Replacing the Jaw Plates

• Why It’s Important: The jaw plates are the primary components responsible for crushing the material. Over time, they can become worn and affect the crushing efficiency.
  
• Recommended Interval: Inspect the jaw plates every 500 operating hours or when you notice a drop in performance.
  
• Steps:
  • Stop the crusher and secure it to prevent accidental startup.
    
  • Inspect the jaw plates for wear, cracks, or damage.
    
  • Replace the jaw plates if they are worn beyond the manufacturer’s recommended specifications.
    

2. Lubricating Moving Parts

• Why It’s Important: Lubrication is essential to reduce friction between moving parts, such as the pitman arm and bearings, preventing premature wear and overheating.
  
• Recommended Interval: Lubricate the moving parts every 100 hours of operation or according to the manufacturer’s guidelines.
  
• Steps:
  • Use the recommended lubrication grade for the pitman arm, bearings, and other moving parts.
    
  • Check the lubrication points as per the maintenance manual and apply grease to prevent friction.
    

3. Inspecting the Flywheel and Pulley

• Why It’s Important: The flywheel and pulley systems provide the mechanical advantage needed to crush the material. Any wear or imbalance can affect the crushing performance.
  
• Recommended Interval: Inspect these parts every 500 operating hours.
  
• Steps:
  • Check for any signs of wear, cracks, or imbalances in the flywheel and pulleys.
    
  • If there is noticeable damage, replace or repair the affected components before continuing operation.
    

4. Monitoring Hydraulic Systems

• Why It’s Important: The hydraulic systems control the tension and adjustments of various components. If the hydraulic pressure is low or the system is malfunctioning, the crusher’s performance will degrade.
  
• Recommended Interval: Check hydraulic pressure every 250 hours and replace hydraulic fluid every 1,000 hours.
  
• Steps:
  • Inspect hydraulic hoses and cylinders for leaks or damage.
    
  • Replace the hydraulic fluid and filter according to the manual specifications.
    

Common Troubleshooting for Hewitt Robins 3654 Crusher
Even with regular maintenance, problems can arise during operation. Troubleshooting common issues early can prevent downtime and expensive repairs. Below are some frequent problems with the Hewitt Robins 3654 Crusher and their solutions:
1. Low Crushing Efficiency

• Possible Causes:
  • Worn jaw plates.
    
  • Incorrect feed size or material.
    
  • Blocked or obstructed discharge area.
    
• Solution:
  • Inspect and replace the jaw plates if necessary.
    
  • Ensure the feed material is within the recommended size range.
    
  • Clear any blockages in the discharge area to allow for proper material flow.
    

2. Excessive Vibration

• Possible Causes:
  • Imbalanced flywheel or pulley.
    
  • Loose or damaged mounting.
    
• Solution:
  • Inspect the flywheel and pulleys for balance and wear.
    
  • Tighten any loose mounting bolts and check the alignment of components.
    

3. Overheating of the Crusher

• Possible Causes:
  • Insufficient lubrication.
    
  • Blocked cooling system.
    
  • Overload conditions.
    
• Solution:
  • Ensure all lubrication points are properly maintained and that the machine is well-lubricated.
    
  • Inspect the cooling system for blockages or leaks, and ensure the temperature monitoring system is functioning correctly.
    
  • Avoid overloading the crusher beyond its rated capacity.
    

4. Hydraulic Failures

• Possible Causes:
  • Low hydraulic fluid levels.
    
  • Damaged hydraulic seals or hoses.
    
• Solution:
  • Check the hydraulic fluid levels and top them up as necessary.
    
  • Inspect the hydraulic hoses and seals for leaks or damage and replace any damaged parts.
    

Optimizing Performance of the Hewitt Robins 3654 Crusher
To maximize the performance of the Hewitt Robins Model 3654 Crusher, operators should follow some best practices for efficient use:

• Proper Material Feed: Ensure that the material being fed into the crusher is of the correct size and is evenly distributed to prevent overloading.
  
• Regular Monitoring: Continuously monitor the crusher’s performance, including motor temperature, vibrations, and crushing efficiency, to identify potential issues early.
  
• Proper Use of Attachments: The 3654 Crusher is often used with various attachments, such as conveyors and feeders. Ensure that these attachments are properly maintained and aligned to prevent operational disruptions.
  

Safety Considerations
Safety should always be the priority when working with heavy equipment like the Hewitt Robins 3654 Crusher. Some key safety measures include:

• Always ensure the crusher is turned off and locked out before performing any maintenance or inspections.
  
• Wear appropriate PPE such as safety goggles, gloves, and steel-toed boots.
  
• Keep the work area clear of debris and avoid standing near the crusher during operation.
  
• Follow all safety procedures as outlined in the operator’s manual to prevent accidents.
  

Conclusion: Maximizing the Lifespan of Your Hewitt Robins Model 3654 Crusher
The Hewitt Robins Model 3654 Crusher is a robust and reliable piece of equipment for heavy-duty crushing operations. By following a rigorous maintenance schedule, addressing common issues quickly, and adhering to best practices for performance optimization, operators can maximize the lifespan and efficiency of this machine. Whether it’s ensuring proper lubrication, addressing hydraulic issues, or replacing worn-out parts, proactive care is essential for keeping the 3654 Crusher in excellent working condition.