The Reasons that Hydraulic Hand Hifter Doesn’t Work And Repair Solution

Why doesn’t the Hydraulic Hand Lifter work? The hydraulic hand lifter is also called a manual hydraulic forklift, hand pallet truck, cattle for moving goods, and so on.

 

Why doesn’t the preformed line fittings work? The hydraulic hand lifter is also called a manual hydraulic forklift, hand pallet truck, cattle for moving goods, and so on. The principle of this product is similar to the principle of the hydraulic jack. Both are engined by the pressure of hydraulic function.

 

Pascal’s principle refers to a state that, in fluid (gas or liquid) mechanics, in a fluid at rest in a closed container, a pressure change in one part is transmitted without loss to every portion of the fluid and the walls of the container. In the picture, as follows, F1(a force is applied to the mall valve piston)will be immediately transmitted to the big valve piston. Whenas F1 is contained in F2(the force due to the big valve piston) S2/S1 times. Here, S2、S1 separately refer to the area of the big valve piston and the small valve piston.

The Principle of the Hand Pallet Truck

 

The key part of a hand pallet truck is a hydraulic jack. It plays an important role in the loading and lifting of goods. So there are many problems with the hydraulic system. In this article, the author who works in a hand pallet truck manufacturer- Beijing Lieying Hoisting Machinery Equipment Group Co., Ltd. will elaborate on several reasons that caused these problems.

 

There are 6 reasons caused these problems as follows:

 

1. Don’t have hydraulic fluid.

2. The purity of hydraulic fluid is not enough.

3. The valve is always turned on due to the adjusting bolt staying close together or the adjusting screw is too tight.

4. There is some air in the hydrocylinder.

5. The quantity of hydraulic fluid is not enough.

6. The rebound valve can’t be turned off due to the impurity in the hydraulic fluid.

 

So the solution is as followed:

1. Take on fuel.

2. Change oil.

3. Exhaust air.

4. Take on enough fuel.

5. Take apart the hydro cylinder, unscrew the bottom plate screw, remove of the impurity on the contact area between the bottom plate and the steel ball.