In daily operations, “pressure not building up” is one of the most common hydraulic press issues. With 20 years of manufacturing experience, Dongguan Huajia Hydraulic Machinery Manufacturing Co., Ltd. summarizes the most frequent causes and solutions to help you troubleshoot quickly and restore optimal performance.
- Common Causes & Troubleshooting
Improper Operation (Common for New Users)
Check if the power supply phase is correct (reversed three-phase wiring can prevent normal pump operation).
Ensure hydraulic oil level is adequate and oil is not degraded.
Verify that the pressure control valve is set within the machine’s rated pressure range.
Power System Failures (Frequent in Older Machines)
Hydraulic pump wear: Touch the pump inlet pipe—weak suction or no vibration may indicate severe internal leakage.
Motor aging: Unusual noise or overheating signals the need for replacement.
Hydraulic Oil Leakage
External leakage: Check hoses, joints, and seals for oil traces.
Internal leakage: Damaged cylinder seals should be replaced with polyurethane or Viton seals for better durability.
Hydraulic Valve Malfunctions
Valve spool sticking: Caused by contaminants or spring failure—clean valve body or replace filter element (recommended every 500 hours).
Solenoid coil burnout: Use a multimeter to check continuity; replace if faulty.
Pressure Measurement Errors
A damaged or uncalibrated pressure gauge should be verified with a secondary gauge.
- Huajia’s Professional Recommendations
Regular Maintenance: Replace hydraulic oil and clean the tank every 6 months to avoid contamination buildup.
Use Genuine Parts: Inferior seals and filters can accelerate wear; Huajia OEM parts extend service life by 30%+.
Technical Support: Our 24-hour engineering team provides remote diagnosis or on-site repair (Hotline: +86-13612798711).
- Why Choose Huajia Hydraulic Machinery?
Quality Assurance: All machines undergo 72-hour full-load pressure testing before delivery.
Full Product Range: Four-column hydraulic presses, servo hydraulic presses, high-speed stamping presses, and custom solutions.
Immediate Service: Contact our online support or call +86-13612798711 for a free technical consultation.