The main cause of oil leakage in tractor transmission system and its prevention

Take the small four-wheel tractor transmission system as an example, the main causes of oil leakage in the transmission system are as follows: (1) Air holes or other manufacturing defects at the joint surface of the transmission case and the end cover, or damage at the joint surface, resulting in surface roughness or Flatness is poor and there are cracks. (2) The brand name of the selected lubricant is wrong, the surface of the gearbox is too thin or the oil level in the gearbox is too high, and the pressure of the oil splashing is higher than normal. (3) Foreign matter is trapped between the gearbox and the end cover, or the size or number of the pad does not match, pleated, deteriorated, damaged, and the assembly direction and position are incorrect. (4) The size or quantity of the oil seal did not meet the requirements. The oil was encapsulated and mounted, and was not installed in a suitable location, and the oil seal or oil seal seat hole was damaged. (5) The tightening torque of the fixing bolts of the gearbox and the end cap does not meet the requirements. If the tightening torque is too loose, the lubricant can directly overflow; if the tightening is too tight, the gasket or the body may be damaged to cause oil leakage; the bolts may be loose and tight, and the contacts may also be contacted. Face movement should be tightened as required by the standard.

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