How to Repair a Manual Hydraulic Forklift That Can't Lift High?

Manual hydraulic forklift is one of the essential tools in the warehousing and logistics industry. However, sometimes we may encounter the problem that the manual hydraulic forklift cannot be raised high. This will not only affect work efficiency, but may also cause a series of operational problems. Don't worry! In this article, I will introduce some solutions to fix the problem that the manual hydraulic forklift cannot be raised high. Let's take a look together!

First of all, we need to figure out the reasons why the manual hydraulic forklift cannot be raised high. Generally speaking, it may be caused by the following problems: insufficient hydraulic oil, oil leakage in the hydraulic system, damage to the lifting piston seal, pump problems, etc.

1 Check the hydraulic system

When the forklift is not lifted high enough, first check the hydraulic system. Because the hydraulic system is the key component of the manual hydraulic forklift to achieve lifting.

Check the level and quality of the hydraulic oil to ensure that the hydraulic oil is clean and within the specified level range. If the hydraulic oil has poor water quality or the level is low, replace or add new hydraulic oil in time.

Check whether the hydraulic oil is sufficient. If not, add hydraulic oil in time. Secondly, pay attention to check whether there is oil leakage in the hydraulic system. You can tighten the hydraulic pipeline and check whether the seal is intact.

If there is no oil leakage in the hydraulic system and the hydraulic oil is sufficient, then there may be a problem with the hydraulic pump, and professional maintenance personnel are required to repair it at this time.

2 Check if the piston seal is damaged

Since the working oil channel, return oil channel, and overflow oil channel run through the three monolithic valve bodies, the sealing between the valve bodies is required to be very tight. After installing the O-ring between the valve body and the valve body oil channel, the valve body is bolted together to achieve the purpose of sealing.

If the hydraulic oil is normal, check the lift valve. It may be that the lift valve is damaged or blocked, causing the forklift to fail to rise. Check whether the lift valve is blocked by foreign objects or the seal is worn.

Damage to the piston seal: The seals of the piston, such as the sealing ring, may be worn or aged, resulting in a decrease in hydraulic capacity. Check the seal of the lifting piston. If it is found to be damaged, it should be replaced with a new seal.

3 Check hydraulic pump failure

The hydraulic pump is responsible for providing the pressure of the hydraulic oil. If the pump fails, the lifting capacity of the forklift will be affected. You can check the operation of the hydraulic pump, such as abnormal noise or low pressure, and if there is a problem, it should be repaired or replaced in time.

If you have some basic maintenance skills, you can also try to perform some simple maintenance operations. For example, check whether the hydraulic oil filter is blocked, clean or replace the filter; check whether the pressure regulating valve of the oil pump is working properly, adjust its working pressure, etc. However, please pay attention to follow the relevant safety regulations and ensure your own safety.

There may be many reasons why a manual hydraulic forklift cannot be raised high, and the repair method varies depending on the situation. If you encounter a complex or uncertain situation, it is best to ask a professional maintenance person to diagnose and repair it. After all, safety is the most important thing! I hope these little tips can help you! If you have any other questions, you can contact us for help!