1、山東裝載機工作環境溫度高在炎熱夏季連續工作，加之冷卻效果差或散熱不良，造成機器發熱量大于散熱量，使油溫過高。
Shandong loader working environment of high temperature Zaiyan hot summer continuous work, coupled with poor cooling effect or bad heat caused by the machine, heat is greater than that of high temperature heat dissipating capacity. 

2、山東裝載機連續長時間在高壓大功率下工作，溢流閥頻繁開啟，液壓系統中油路和元件因長時間高壓卸荷而使油液升溫。
Shandong loader working for a long time in high power, relief valve open frequently, the hydraulic system oil road and components for a long time and high pressure unloading oil heating. 

3、山東裝載機液壓泵是產生熱量的主要元件。液壓泵轉速高，排油壓力高，工作環境惡劣，油液污染、油液選用不合規定或油液過少，都可造成泵損、泄漏。泵內泄漏可使其功率損失增大，磨損嚴重。油液中侵入空氣后易于壓縮，可造成泵干磨。液壓泵內長時間的泄漏、干磨或壓縮厲害， 必然發熱，引起油液升溫，造成系統發熱。
Shandong loader hydraulic pump is the main component of heat generation. High speed hydraulic pump, oil discharge pressure is high, the working environment is bad, oil pollution, oil selection is not specified or too little oil, can cause the pump damage, leakage. Pump leakage can increase the power loss, wear and tear. After the oil in the air is easy to compress, can cause pump dry mill. Hydraulic pump for a long time the leak, dry grinding or compression, the inevitable heat, causing oil temperature rise, causing the system fever.