Hey there! As a supplier of NC Press Brakes, I often get asked about various maintenance and replacement procedures. One of the common questions is how to replace the hydraulic pump of an NC Press Brake. In this blog, I'll walk you through the whole process step by step.
First off, let's understand why you might need to replace the hydraulic pump. Over time, the hydraulic pump in your NC Press Brake can wear out due to continuous use. You might notice a decrease in the machine's performance, like slower bending speeds or inconsistent pressure. That's usually a sign that the pump is on its last legs and needs to be replaced.
Before you start the replacement process, you'll need to gather a few tools. You'll need a set of wrenches, a socket set, a hydraulic fluid drain pan, and a new hydraulic pump that's compatible with your NC Press Brake. Make sure you have all these tools handy before you begin.


The first step is to shut down the NC Press Brake and disconnect it from the power source. This is crucial for your safety. You don't want the machine to suddenly start up while you're working on it. Once it's powered off, locate the hydraulic pump. It's usually found near the hydraulic reservoir, which stores the hydraulic fluid.
Next, you'll need to drain the hydraulic fluid from the system. Place the drain pan under the pump and use a wrench to loosen the drain plug. Let the fluid drain completely into the pan. Make sure to dispose of the old fluid properly, as it can be harmful to the environment.
After draining the fluid, you'll need to disconnect the hydraulic hoses from the pump. Use a wrench to loosen the hose fittings and carefully remove the hoses. Be careful not to damage the hoses or the fittings. You might want to label the hoses to make sure you reconnect them correctly later.
Now it's time to remove the old hydraulic pump. Use a socket set to remove the bolts that hold the pump in place. Once the bolts are removed, carefully lift the pump out of its mounting bracket. You might need a little help from a friend or a colleague, as the pump can be quite heavy.
Before installing the new pump, take a moment to clean the mounting bracket and the surrounding area. Remove any dirt, debris, or old gasket material. This will ensure a proper seal when you install the new pump.
Now, place the new hydraulic pump in the mounting bracket and align it with the bolt holes. Insert the bolts and tighten them using the socket set. Make sure the pump is securely fastened.
Next, reconnect the hydraulic hoses to the new pump. Use a wrench to tighten the hose fittings, but be careful not to over-tighten them. Over-tightening can damage the fittings and cause leaks.
Once the hoses are reconnected, it's time to refill the hydraulic system with new fluid. Use a funnel to pour the fluid into the hydraulic reservoir. Make sure to use the type of fluid recommended by the manufacturer. You can usually find this information in the machine's manual.
After refilling the fluid, start the NC Press Brake and let it run for a few minutes. Check for any leaks around the pump and the hoses. If you notice any leaks, stop the machine immediately and tighten the fittings.
Finally, test the machine to make sure it's working properly. Perform a few test bends to check the bending speed and pressure. If everything seems to be working fine, you're good to go!
Replacing the hydraulic pump of an NC Press Brake might seem like a daunting task, but with the right tools and a little patience, you can do it yourself. However, if you're not comfortable doing it on your own, it's always a good idea to hire a professional technician.
At our company, we offer a wide range of Hydraulic Press Bending Machine and Servo Electric Press Brake Machine that are known for their reliability and performance. Our Hydraulic Sheet Metal Press Brake is designed to meet the needs of various industries, from small workshops to large manufacturing plants.
If you're in the market for a new NC Press Brake or need help with maintenance and replacement, don't hesitate to contact us. We have a team of experts who can provide you with the right advice and support. Whether you're a first-time buyer or an experienced user, we're here to help you make the right choice.
References:
- NC Press Brake User Manual
- Hydraulic Pump Manufacturer's Guidelines




