+86 15868609134info@riverlakeco.com
Products Category
Hydraulic Press

How do you bleed air out of a hydraulic hand pump

hydraulic hand pump

You bought a new hand pump but found that the hand pump does not suction oil when it is working. Even if you press the handle of the hand pump repeatedly, the hand pump starts to suction oil, and the oil intake is much less than normal. Please don’t worry, this is because there is a shortage of oil inside the fuel tank of the manual pump and it has not been used for a long time, and air has entered the inside of the plunger of the manual pump. At this time, we need to bleed the air inside the plunger, and the manual hydraulic pump can work normally.

Let’s take a RIVERLAKE P-462 two-speed hydraulic hand pump as an example, in order to completely expel the air inside the hand hydraulic pump plunger, please follow the steps below:

1. Fill the manual pump oil tank with hydraulic oil, connect the manual pump, hydraulic hose, and hydraulic cylinder

2. Turn the air release valve clockwise to open the air release valve

3. Rotate counterclockwise to loosen the air release screw of the plunger, turn on the manual position valve of the manual pump, and press the handle repeatedly to discharge the air inside the piston. When the air is exhausted, tighten the plunger bleed screw by turning counterclockwise and wiping the surface of the hand pump with a rag.

4. Now that we have expelled the air from the hand pump piston, we still need to test the hand pump to confirm that the problem has been solved. Turn off the hand pump switch, retract the hydraulic cylinder, turn the hand pump switch back on, and press the hand pump handle repeatedly, the first need to press The force of the hand pump will be relatively large, and the hydraulic cylinder piston will also start to rise rapidly. This is because in the first stage of the two-speed hydraulic pump, the larger plunger in the hydraulic pump works; once the piston rises to the maximum height, the pressure reaches the first stage. The pressure required for the second stage, the force required to press the handle is greatly reduced, because the smaller plunger in the hand pump starts the second stage pressurization work. After the test is completed, if everything is normal, it means that the air in the hand pump has been completely discharged.

Related Posts

how to clean rust off the hydraulic cylinder

how to clean rust off the hydraulic cylinder

Rust is a common problem that can affect hydraulic cylinders. The corrosion caused by rust can lead to pitting and other damage to the cylinder, which can cause it to fail. In order to avoid this, it is important to take steps to prevent rust from forming in the first place. Why does rust form on hydraulic cylinders There are several reasons why rust can form on a cylinder. One reason is that the cylinder is not properly sealed. If dirt, moisture, or other contaminants get inside the cylinder, they can cause rust to form. Another reason why rust can form on a cylinder is because of the material that it is made out of. Some materials are more prone to rust than others(learn more about the materials used in cylinder production here). And finally, the way that the cylinder is used can also contribute to rust formation. The various ways that rust can be removed from a cylinder Rust can be very difficult to remove and often requires the use of special tools and chemicals. There are several methods that can be used to remove rust from a cylinder head. One common method is to use a wire brush to scrub off
Hydraulic Cylinder Leaks (And How to Fix them)

Hydraulic Cylinder Leaks (And How to Fix them)

What is a Hydraulic Cylinder, and How does it work? A Hydraulic Cylinder is a mechanical actuator, designed to carry a Hydrostatic force in a single direction. Commonly used in construction equipment, civil engineering, and machinery designed for the manufacturing process. A hydraulic cylinder uses any form of hydraulic fluid, typically oil, that is pushed back and forth by a piston into each side of the cylinder. This enables the linear motion to work, making machines such as Bulldozers and tractors carry out movements such as breaking down buildings or heavy lifting that cannot be done through human force. Hydraulic cylinders consist of a piston rod, a piston seal, and two separate regions, all nutted and bolted together to exert the force of hydraulic fluid within the cylinder tube. A hydraulic cylinder exerts massive amounts of force, anywhere from several kilograms, to a couple of thousand tonnes! Whatever linear motion you need automating, a good quality hydraulic cylinder is the perfect solution for any manufacturing, farming, civil engineering, or automation company’s needs. What Causes Hydraulic Cylinders to Leak? A common problem for high-load engineering and manufacturing companies is working out ways to minimize leakages from their hydraulic cylinders. Leakages in
Hydraulic Testing Projects With China National Offshore Oil Corporation

Hydraulic Testing Projects With China National Offshore Oil Corporation

Project Images Project Introduction Hydraulic Testing Projects With China National Offshore Oil Corporation
Single Acting Lock Nut Hydraulic Cylinders

Calculate Force in Your Hydraulic Cylinder the Easy Way

In hydraulic systems, force is a crucial element in controlling the flow of liquids and gases. In this article, we will discuss how to calculate the force exerted by a hydraulic cylinder. First, we need to know the dimensions of the piston and cylinder. Second, we need to know the working pressure of the hydraulic cylinder. The force exerted in a hydraulic cylinder can be calculated using the following equation: F = P x A. where F is the force, P is the pressure of the fluid in the cylinder, and A is the working effectiveness area of the piston. This equation can be used to calculate forces in any hydraulic system. For example, the effective area of a double-acting cylinder is 0.145m² for push and 0.048m² for retraction, rated working pressure is 70Mpa. The pushing force should be  F(push)=70MpaX0.145m²=10.15Ton, and the pulling force should be F(pull)=70MpaX0.048m²=3.3Ton.