I. Selection and Installation 

The weight of the counterweight, the center of gravity position, and the rear sag of the forklift are determined by the overall structure of the vehicle. Among them, the selection of the balance weight mass mainly considers the longitudinal stability of the forklift when it is fully loaded and traveling at full load. The quality of the balance weight directly affects the front-to-back balance protection coefficient of the forklift and is the main parameter for determining the protection coefficient of the forklift. When the total weight of the counterweight g is determined, that is, based on the rear axle as the reference, the installation size of the counterweight is accurately determined according to the assembly form of the counterweight on the frame. The upper outer side of the forklift tail frame has two inverted V-shaped suspension blocks, and two balance reuse bolts are fixed on them. 

II. Ventilation Holes 

Since thermal balance is an important parameter for the counterweight of a forklift, a poor heat dissipation performance can lead to excessively high engine coolant temperature, thereby affecting the overall performance of the forklift. Therefore, the positions of the balanced ventilation holes, the air ducts, and the air vortex orientation are extremely crucial. The higher the ventilation holes are, the more conducive they are to heat dissipation; the use of rounded corners to transfer the ventilation holes between the radiators is beneficial for air flow guidance and heat dissipation performance. 

III. Departure Angle 

The departure angle at the lower end of the counterweight is also very important. This angle is mainly used to separate the friction between the lower end of the counterweight and the ground when moving up or down slopes. Theoretically, the deviation angle is equal to the large climbing angle of a specific vehicle model. The position of the end point where the counterweight weight stops should be determined based on the large climbing slope of the specific vehicle and the rear suspension of the counterweight weight. 

IV. Position of the Starting Hook Hole 

The positioning of the two lifting holes on the counterweight is also very important for the forklift. To facilitate the fishing gear installation, the two lifting holes should be symmetrically arranged on both the left and right sides of the counterweight, and the front and rear directions should be aligned with the center of gravity of the counterweight on the same line.