Preventing Hydraulic Lock in Forklift Cylinders

Preventing Hydraulic Lock in Forklift Cylinders

What is hydraulic lock?

Hydraulic lock occurs when a fluid is trapped in a cylinder and prevents the piston from moving. In the case of forklift cylinders, this can result in decreased performance or even complete failure of the hydraulic system.

Why does hydraulic lock occur?

Hydraulic lock can occur for several reasons, including air pockets in the system, incorrect fluid levels, or a damaged cylinder.

How can hydraulic lock be prevented?

One way to prevent hydraulic lock is by properly maintaining the hydraulic system, including regularly checking fluid levels and replacing any damaged cylinders. Additionally, using a hydraulic lock release valve can help release any trapped air or fluid in the system.

Types of Forklift Cylinders

1. Lift Cylinders

Lift cylinders are responsible for lifting and lowering the forklift's mast. They are also used to tilt the mast forward and backward.

2. Tilt Cylinders

Tilt cylinders are used to tilt the mast left and right, allowing the operator to adjust the angle of the forks.

3. Side-Shift Cylinders

Side-shift cylinders are used to move the carriage of the forklift from side to side, allowing the operator to position the forks accurately.

4. Fork Positioner Cylinders

Fork positioner cylinders are used to move the forks closer together or further apart, allowing the operator to handle larger or smaller loads.

5. Boom Cylinders

Boom cylinders are used in telescopic forklifts to extend and retract the boom, allowing the forklift to reach greater heights. Click here to learn more about boom cylinders.

About Our Company

We are a leading manufacturer of hydraulic cylinders in the Chinese market. Our products include forklift cylinders, small hydraulic cylinders, hydraulic pistons, lift cylinders, boom cylinders, side-shift cylinders, and fork positioner cylinders. With a design production capacity of 200,000 sets annually and over 300 units produced every year, we use state-of-the-art CNC machines and fully automated hydraulic cylinder assembly equipment to ensure quality products, competitive pricing, and excellent customer service. We also provide customized hydraulic cylinders for high-altitude work platforms, industrial vehicles, drilling rigs, cranes, construction machinery, mining trucks, and sanitation equipment. Contact us today for more information or to request a quote.


1. How often should forklift cylinders be replaced?

It is recommended to replace forklift cylinders every 5,000 hours of operation or sooner if any damage or leaks are detected.

2. What type of fluid should be used in forklift hydraulic systems?

The type of fluid used in forklift hydraulic systems may vary depending on the manufacturer's recommendations. It is important to use the correct type of fluid to ensure optimal performance and prevent damage to the hydraulic system.

3. Can hydraulic lock cause damage to other forklift components?

Yes, hydraulic lock can cause damage to other forklift components, such as hoses, seals, and valves, if the pressure in the system is not released properly or in a timely manner. This can result in costly repairs and downtime for the forklift.