Most signs of hydraulic cylinder failure in Chongqing vehicle-mounted highway guardrail piling machines are incorrect behavior or malfunction, with reasons for the failure and how to handle them as follows:

1. The flow valve or directional valve spool of the hydraulic cylinder is blocked or the valve hole is clogged, causing the hydraulic cylinder to malfunction or misoperate. Check if the oil is contaminated and whether there are foreign objects blocking the spool or valve hole. Remove blockages, colloidal deposits, filter the oil in time, add new clean oil, and clean the spool or valve hole. Check the valve body for wear, and replace it if the wear is severe.

2. If the piston rod and cylinder body are stuck or obstructed, the hydraulic cylinder may not work or may result in unresponsive operations. Water will timely adjust the relevant tightening and positioning, remove debris, and replace damaged or malfunctioning components and seals.

3. The resistance in the hydraulic system's execution pipeline is too large, or the pressure adjustment of the pressure or flow valve is incorrect. Due to interference from the pressure source, the working pressure of the hydraulic system is low. First, check the pressure source and adjust the pressure to meet the system requirements within the desired range.

4. Check for hydraulic cylinder failures caused by air in the hydraulic system, ensure the hydraulic oil tank level is normal, and inspect seals, joints, and the primary oil intake filter for being too dirty or clogged.

5. The initial movement of the hydraulic cylinder is slow in low-temperature environments due to high viscosity and poor fluidity of the hydraulic oil, which can cause slow movement of the hydraulic cylinder. This can be alleviated by installing a heater or warming the piling machine. It is best to replace the hydraulic oil with one that has better viscosity-temperature performance.

The above are analyses and explanations of hydraulic cylinder failures or failures of Chongqing vehicle-mounted highway guardrail piling machines. Hope this helps in your future work.