PC60-7 FOOT PEDAL hydraulic

3 week ago

1 0 

4 year

Product details

I. Functions of the Foot Pedal Hydraulic System

1. Travel Speed Control

• The foot pedal converts operator input into hydraulic signals via a proportional valve (e.g., travel speed solenoid valve), adjusting the main pump's displacement to control the travel motor's rotational speed.

• Light pedal pressure reduces pump displacement and travel speed, while heavy pressure increases it, enabling stepless speed regulation.

2. Direction Switching Assistance

• In some models, the foot pedal works in tandem with the travel control lever, using hydraulic logic valves to simplify forward/reverse direction changes.

II. Hydraulic System Components

1. Foot Pedal Assembly

• Includes the pedal, hydraulic sensor (or displacement sensor), and connecting oil passages, converting mechanical displacement into hydraulic pressure signals.

2. Travel Speed Solenoid Valve

• Receives hydraulic signals from the foot pedal and uses electromagnetic control to adjust the main pump's swashplate angle, altering pump displacement.

3. Main Pump & Travel Motor

• The variable-displacement piston pump outputs flow based on hydraulic signals, driving the travel motor to move the excavator.

4. Hydraulic Lines & Filters

• High-pressure hoses connect components, while filters ensure clean hydraulic oil to prevent valve sticking or wear.

III. Operation & Maintenance Guidelines

1. Operating Procedures

• Check pedal smoothness before startup to avoid jamming; apply even pressure during operation to prevent hydraulic shock.

• Replace worn return springs periodically, as they may fatigue after prolonged use.

2. Maintenance

• Hydraulic Oil Management: Replace hydraulic oil every 2,000 hours (or as per the manual) using Komatsu-recommended fluid.

• Filter Replacement: Synchronously replace suction and return filters to prevent contaminants from entering the system.

• Line Inspection: Check hoses for aging or leaks, focusing on pedal connections and travel motor high-pressure lines.

3. Troubleshooting

• Weak Travel: Verify pedal signal strength; if weak, inspect sensors or blocked oil passages. If signals are normal, check main pump pressure or travel motor internal leakage.

• Unstable Speed: Investigate hydraulic oil viscosity (e.g., poor low-temperature flow) or solenoid valve sticking.

IV. Technical Advantages

1. Precision Control

• Hydraulic proportional technology ensures linear pedal operation and travel speed, enhancing fine-motion performance for tasks like slope adjustments and precise positioning.

2. Reliable Design

• Robust hydraulic components with superior sealing withstand harsh conditions (e.g., muddy or dusty environments).

3. Energy Efficiency

• Load-sensitive hydraulic system (LSD) automatically adjusts pump displacement based on load demand, reducing energy consumption and extending component life.

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Ningbo Hengnuo Hydraulic Drive Co.,Ltd

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4 year

Main Product: hydraulic motor, gear box , hydraulic pump, hydraulic valve , hydraulic winch, hydraulic system

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