Hydraulical system maintenance for injection molding machine is crucial for ensuring optimal performance, minimizing downtime, and prolonging the machine’s lifespan.
The hydraulic system in an injection molding machine powers and controls the movement of various machine components, ensuring precise and efficient molding operations. It is a critical subsystem that utilizes hydraulic fluid under pressure to perform mechanical actions like clamping, injection, and ejection.

hydraulical system maintenance for injection molding machine
Steps for hydraulical system maintenance
Hydraulic fluid maintenance
- Fluid levels: Ensure the fluid is at the recommended level. Low levels can cause cavitation and damage the pump.
- Fluid quality:
- Regularly check for contamination (water, dirt, or metal particles).
- Monitor fluid viscosity and temperature. High temperatures can degrade hydraulic oil.
- Replacement: Replace the hydraulic oil as per the manufacturer’s recommendations or if contamination is detected.
Filters of hydraulical system maintenance
- Inspection: Regularly inspect and replace hydraulic filters to prevent debris from circulating in the system.
- Replacement schedule:Follow the manufacturer’s schedule or when pressure drop across the filter increases.
- Strainers: Clean strainers in the reservoir as part of routine maintenance.
Pumps and valves of hydraulical system maintenance
- Pump maintenance:
- Listen for unusual noises or vibrations.
- Ensure proper alignment and lubrication.
- Valve checks:
- Test solenoid valves for proper operation.
- Inspect for wear or sticking, and clean if necessary.

Hoses and connections
- Inspection: Check hoses for cracks, bulges, or wear spots.
- Replacement: Replace damaged or aging hoses proactively to prevent sudden failures.
- Connections: Tighten loose fittings to avoid leaks.
Cooling system of hydraulical system maintenance
- Ensure the cooling system is functional to maintain hydraulic fluid temperature.
- Clean heat exchangers and cooling fans to avoid overheating.
- Check water or air cooling supplies for proper flow.
Preventive Maintenance Schedule
- Weekly:
- Inspect and clean filters, strainers, and screens.
- Check for noise and vibration in pumps and motors.
- Monthly:
- Test hydraulic pressure and temperature sensors.
- Inspect all hoses and fittings for wear.
- Annually:
- Perform a complete system flush (if needed).
- Inspect the reservoir for sediment buildup and clean as required.
Haichen hydraulical system for injection molding machine
hydraulical system for injection molding machine
Haichen is a supplier that mainly supplies injection molding machine. We have two series machine, K series and E series machine. The Haichen hydraulic system is a critical component of injection molding machines, designed for precision, efficiency, and reliability.
If there is any problems about injection molding machine hydraulical system, welcome to consult us.
By doing hydraulical system maintenance for injection molding machine, you can effectively extend the life of your injection molding machine, reduce downtime, and increase productivity. Maintenance not only saves time and costs, but also provides the plastics industry with safer, sustainable manufacturing practices.











