Adjustment of forklift chains. The chains on most of the gantries of today’s forklift trucks are of double chain type, there are two kinds of sheet type lifting chains and sleeve stick chains. The structure is as follows: piece lifting chain, live joint shaft, upper latch, chain piece, pin, lower latch; sleeve roller chain, chain, pulley, adjusting bolt, chain fixing plate, fixing bolt, fork frame, adjusting nut.


If the forklift chain is too long, the lifting height will not reach the requirement; if the forklift chain is too short, it will cause the fork frame to run out of the fork channel steel in a serious accident. The two chains are loose and tight, causing a chain overload and bias load, which will cause unstable and inflexible movement of fork frame and inner gantry, therefore, the two chains must be adjusted. The adjustment method is as follows:

1, Stop the forklift on a flat site, with the door frame in a vertical state, lower the forks to the ground, and lower the piston of the lifting hydraulic cylinder (plunger) to the lower stop.

2, Load the chains, one end of the two chains is connected to the fork frame and locked.

3, Make the chain go around the pulley, and the other end is connected to the flange of the hydraulic cylinder body or the outer gantry beam, and adjust the chain length with the hinge bolt.

4, Press the chain with a finger at 1000mm from the ground with a force of 49N, the chain should move less than 20mm, and adjust the other chain in the same way.

5, After the two chains are adjusted, lift the fork and check the tightness of the two chains, the length should be the same.

First of all, we should check whether the chain length of forklift is consistent, if the length difference is more than 5MM, it should be readjusted; the chain in forklift parts should not have cracks and deformation, it should be flexible in rotation, and the elongation of every 20 chains should not exceed 8mm, if cracks, deformation and elongation exceeds the regulation, it must be replaced; the wear of the chain pin should not exceed 5% of the original diameter, and it should be replaced when there is too much wear, bending, fatigue cracks and serious rusting.