What causes oil leakage on the top of the Shidai Jingang 726 transmission?
2 Answers
Oil leakage on the top of the Shidai Jingang 726 transmission may be caused by poor sealing gaskets in various parts or improper use of lubricating oil. Poor sealing gaskets in various parts: Poor sealing gaskets in various parts of the transmission, damaged oil seals, loose fastening bolts, cracked transmission housing, excessive gear oil, clogged transmission vent holes, worn oil seals or flanges, excessive axial end clearance, loose bearing seats and bearings, damaged gaskets, or the surface processing quality of various sealing components not meeting the requirements of the product drawings. Improper use of lubricating oil: Improper use of lubricating oil can also cause oil leakage. In summary, the main causes of the above-mentioned oil leakage are two aspects: first, there is a gap on the sealing surface, and second, there is a pressure difference on both sides of the seal. Eliminating or reducing either factor can prevent or reduce leakage.
I've been driving on mountain roads for over a decade and encountered many transmission oil leakage issues. The main causes are usually aging and cracking of sealing rings – over time the rubber hardens and loses elasticity. Worn oil pan gaskets or loose bolts can also cause leaks due to vibration on bumpy roads. External impacts causing casing cracks are another problem. For workhorse models like the Shidai Jinang 726 that frequently carry heavy loads, the seals wear out faster. I recommend paying extra attention to oil levels and stains during each maintenance check. Address any minor leaks immediately – don't wait until all the oil leaks out like I did before, which ruined the entire transmission and cost me tens of thousands in unnecessary repairs. Also, excessive oil pressure or overfilling can cause spills. Developing a habit of regular inspections saves major trouble, and driving more smoothly to reduce impacts helps too.
