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Injection molding machine oil pump damage reasons


Oil pump is a critical component of the injection molding machine, responsible for providing hydraulic pressure and maintaining a steady flow of oil throughout the hydraulic system. Over time, the oil pump can become damaged, leading to decreased performance and ultimately, machine failure.  The following are some of the common reasons for injection molding machine oil pump damage:


Overheating is a common cause of damage to the injection molding machine's oil pump.  When the temperature of the hydraulic oil exceeds its recommended operating range, it can cause the oil to break down, resulting in increased wear and tear on the pump.


Contaminants such as dirt, debris, and moisture can enter the hydraulic system and damage the oil pump.  Contamination can lead to clogged filters, restricted oil flow, and increased wear on pump components.

Improper maintenance

Improper maintenance is another common reason for oil pump damage.  Lack of regular maintenance, including oil changes, cleaning, and filter replacement, can lead to increased wear and tear on the oil pump components, ultimately causing failure.

Age and wear

As the injection molding machine ages, the oil pump's components wear out, leading to decreased efficiency and increased likelihood of failure.  Worn-out components such as seals and bearings can cause oil leaks and decreased pumping efficiency.

Improper installation

If the oil pump is not installed correctly, it can cause damage to the pump's components and lead to failure.  Improper installation can cause misalignment, improper mounting, and other issues that may prevent the oil pump from functioning correctly.

Improper operation

The injection molding machine operator's actions can also cause damage to the oil pump.  Improper use of the hydraulic system, such as using the machine beyond its capacity or running the machine at improper temperatures, can lead to oil pump damage.


Preventing oil pump damage requires proper maintenance and implementation of the following preventive measures:

Regular maintenance schedules - adhere to the manufacturer's recommended maintenance procedure, including oil changes, cleaning, and filter replacement.

Proper operation- Operate the injection molding machine within its limits and temperature ranges.

Contamination prevention- guard against contaminants by using appropriate techniques to keep the unit clean, including filter replacement and oil changes.

Proper installation - ensure that the oil pump is installed correctly and aligned with the hydraulic system.

Regular inspection - Regular inspection and timely replacement of worn-out components.

The oil pump is a critical component of the injection molding machine.  Ensuring proper maintenance of the pump and implementing preventive measures to mitigate common causes of pump damage can help extend the life of the injection molding machine.  Proper maintenance and preventive measures can help reduce downtime, save cost, and facilitate efficient molding production.

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