Adjusting the parking brake on a Komatsu PC360LC-10 or PC390LC-10 hydraulic excavator involves several steps and requires a good understanding of the machine’s components. click here for more details on the download manual…..
- Test Run: Komatsu’s -11 Excavators Equipped with intelligent Machine Control 2.0 | The Dirt #97 Bryan Furnace, equipment operator and host of The Dirt, recently got a chance to test run some of Komatsu’s -11 series …
- Komatsu PC360LC-11 hydraulic excavator – pre-operation inspection A pre-operation inspection of Komatsu’s PC360LC-11 Hydraulic Excavator. Learn more: https://bit.ly/2CHuTGs The …
Below is a detailed guide on how to perform this adjustment, including descriptions of the components involved.
### Components Involved:
1. **Parking Brake Assembly**: This includes the brake actuator, brake shoes, and brake drums. The parking brake is typically a spring-applied, hydraulically released brake.
2. **Adjustment Nut**: This is usually located on the parking brake actuator or cable. Turning this nut will adjust the tension of the brake cable.
3. **Brake Linkage**: This connects the brake pedal to the brake actuator, allowing the operator to engage and disengage the parking brake.
4. **Brake Shoes**: The friction components that press against the drum to create the necessary stopping power.
5. **Brake Drum**: The cylindrical component that the brake shoes press against.
### Tools Required:
– Wrench set
– Torque wrench
– Screwdriver
– cleaning cloth
– Safety glasses
– Service manual for torque specifications and diagrams
### Steps for Adjusting the Parking Brake:
#### 1. **Preparation:**
– **Safety First**: Ensure the excavator is on a flat, stable surface. Engage the hydraulic locks to prevent any movement. Wear safety glasses and gloves.
– **Check the Service Manual**: Refer to the service manual for specific torque specifications and diagrams relevant to your excavator model.
#### 2. **Locate the Parking Brake Assembly:**
– The parking brake assembly is generally located near the rear of the excavator, around the transmission area.
– Identify the adjustment nut and the brake linkage connected to the brake actuator.
#### 3. **Inspect the Brake Components:**
– Before adjusting, inspect the brake shoes and drums for wear. Look for any signs of damage, such as cracks or excessive wear on the shoes and drums.
– If any components are worn beyond acceptable limits, they should be replaced before making adjustments.
#### 4. **Adjust the Brake Cable:**
– Locate the adjustment nut on the brake cable or actuator.
– Use a wrench to turn the adjustment nut. Generally, turning the nut clockwise tightens the cable, while counterclockwise loosens it.
– Adjust until there is a slight tension in the cable, but not so tight that the brake is engaged when the pedal is released.
#### 5. **Test the Adjustment:**
– After making the adjustment, check the brake functionality.
– Start the engine and engage the parking brake. The brake should hold the excavator in place when in gear.
– Release the brake
and ensure that it completely disengages.
#### 6. **Final Checks:**
– If necessary, repeat the adjustment process until the parking brake functions correctly.
– Once satisfied with the adjustment, ensure all nuts and bolts are securely tightened to the manufacturer’s specifications.
– Clean any debris or grease from the brake components.
#### 7. **Documentation:**
– Document the maintenance performed, including any parts replaced or adjustments made.
### Conclusion:
Adjusting the parking brake on a Komatsu PC360LC-10 or PC390LC-10 hydraulic excavator is a crucial maintenance task that ensures the safety and functionality of the machine. Regular checks and adjustments will prolong the life of the brake components and enhance the overall performance of the excavator. Always refer to the service manual for precise specifications and diagrams related to your specific model. If you’re unsure or uncomfortable performing this task, it’s advisable to consult a qualified technician.
The clutch disc is a crucial component in a vehicle’s manual transmission system, playing an essential role in the engagement and disengagement of the engine’s power to the wheels. Positioned between the engine flywheel and the pressure plate, the clutch disc acts as a friction surface that allows smooth transitions between gear changes.
Typically constructed from a metal core lined with friction material, the clutch disc is designed to withstand high temperatures and pressures generated during operation. The friction material, often made of composite materials, enables the disc to grip the flywheel effectively when the clutch is engaged, allowing the engine’s rotational force to transfer to the transmission. When the clutch pedal is pressed, the pressure plate releases tension on the clutch disc, allowing it to spin freely and disengage from the flywheel. This disengagement is essential for shifting gears without grinding or damaging the transmission.
Over time, the clutch disc may wear down due to friction and heat, leading to issues such as slippage, difficulty in shifting, or complete failure. Regular inspections and timely replacements are vital to ensure optimal performance and longevity of the vehicle’s drivetrain. The design and specifications of clutch discs can vary widely based on vehicle type and intended use, from standard passenger cars to high-performance racing vehicles, emphasizing the significance of this component in automotive engineering.