What are the troubleshooting methods for excessively high oil temperature in a hydraulic system?
2 Answers
Hydraulic system oil temperature is too high troubleshooting as follows: 1. Improper design: The system lacks an unloading circuit, causing the hydraulic pump to continue high-pressure overflow when idle. 2. Improper usage: Low oil level in the tank prevents the hydraulic system from having sufficient flow to dissipate generated heat, resulting in inadequate circulation and cooling conditions that elevate oil temperature. Using hydraulic oil with incorrect brand, quality, or viscosity grade, or mixing different brands, leads to viscosity index being either too low or too high. Poor construction site conditions. When abrasive particles, impurities, and dust pass through the filter, they adhere to the filter element. Failure to regularly inspect and replace the filter element increases suction resistance and energy consumption, causing oil temperature rise. Malfunctioning hydraulic oil cooling circulation system. 3. Hydraulic component issues: Some components in the system have low manufacturing precision, poor quality, severe internal leakage, and significant volumetric losses, which also generate heat. Severe wear of hydraulic parts.
I've encountered the issue of excessively high hydraulic oil temperature several times, and the key is to trace it back to the source. The most common cause is a clogged radiator - accumulated dust and leaves impair heat dissipation, so regular cleaning is necessary. Insufficient oil level can also lead to temperature rise; check the dipstick to ensure it's within the marked range and top up with the appropriate grade of hydraulic oil. Don't overlook deteriorated oil quality - old, degraded oil has poor heat absorption, so it's best to change it every six months. System overload is another pitfall, especially during prolonged heavy-load operations where the engine works hard and the hydraulic pump can't cope - try reducing the load or installing additional cooling systems. If the problem persists, there might be pump or valve failures causing leaks, in which case professional tools are needed to test pressure and repair or replace components. Excessive temperature thins the oil, impairing lubrication, wearing out seals, and potentially damaging the entire system. Pay attention to these points during regular maintenance.
