Common malfunctions of manual forklifts involve hydraulic systems, mechanical components, and seals, which require regular maintenance, standardized operation, and timely replacement of worn parts to ensure stable and reliable operation. The following is an analysis and improvement suggestions for common faults of manual forklifts:

1、 Common Fault Analysis

Hydraulic system malfunction

Forks cannot be raised to the highest or cannot be raised: This may be due to insufficient hydraulic oil, impurities in the hydraulic oil, improperly adjusted pressure relief valves, or air in the hydraulic oil.

The fork does not descend: it may be caused by deformation of the cylinder piston rod due to biased load, damage or deformation of parts due to biased load, or improper adjustment of the pressure relief valve.

Hydraulic system oil leakage: commonly found at the joint surface of the cylinder barrel, piston rod, hydraulic pump and connecting pipeline interface, control valve and operating handle, and other parts. The root causes of oil leakage are often due to mechanical wear, aging of sealing materials, improper installation, or oil pollution.

mechanical failure

Unbalanced fork arm: It may be due to long-term heavy load, resulting in deformation of the pin shaft connecting the square connecting rod and the wheel fork, as well as the pin shaft connecting the wheel fork and the frame.

Wheel wear and frame wear: When the wheels wear to a certain extent, it can cause the frame to come into contact with the ground, increase running resistance, and accelerate frame damage.

Sealing component malfunction

Wear or damage of seals: After long-term use, seals will gradually lose their elasticity and sealing properties, leading to hydraulic oil leakage.

Cracking or wear of parts: Various parts in hydraulic systems may experience wear or cracking due to the erosion of high-pressure oil, frequent mechanical motion, and external impact during long-term use.

2、 Improvement suggestions

Hydraulic system maintenance

Regularly check the hydraulic oil: ensure that the hydraulic oil is sufficient and clean, and replace severely polluted or deteriorated oil in a timely manner.

Remove air: If there is air in the hydraulic oil, it should be removed through specific operations (such as shifting the manual hydraulic forklift gear up and pressing the handle a few times).

Adjust the pressure relief valve: Check and adjust the pressure relief valve to ensure its normal operation and prevent hydraulic oil leakage.

Replace seals: For worn or damaged seals, new seals should be replaced promptly to ensure good sealing.

Mechanical component maintenance

Check the fork arm: Regularly check whether the fork arm is balanced, and for severely deformed pins, replace them with new ones in a timely manner; For slightly deformed shafts, the balance of the fork arms can be restored by adjusting the height of the wheels.

Replace wheels: Once the wheels are found to be worn to the extent that they affect normal use, they should be replaced with brand new wheels in a timely manner to avoid overloading the forklift and reduce abnormal wheel wear.

Operating standards and training

Standardized operation: Operators should strictly follow the operating procedures when using manual forklifts to avoid equipment damage or safety accidents caused by unauthorized operations.

Strengthen training: Regularly train operators to improve their understanding of equipment failures and emergency response capabilities.

The main equipment produced by Hebei Makita: stage electric hoist, electric chian hoist, wire rope electric hoist，Hand chain hoist, lever hoist, pneumatic hoist and other lifting equipment