Heavy dump truck engine oil pump drive shaft deformation or damage to the dumping mechanism completely lose effectiveness and the reasons generally have several: in the vehicle driving force is not disengaged. Because of the high-speed operation of the hydraulic pump for a long time, the hydraulic oil temperature rise very quickly, on the one hand will cause burning of oil pump oil seal, oil pump "burned", another serious consequences is gear pump centrifugal force to increase, oil pump drive shaft will in this large centrifugal force caused by deformation, damage; vehicle load lifting, excessive operation. If the force screw up the clutch pedal, because the system suddenly joined the force taking device, pump shaft and the pump itself caused great impact load, the most likely to cause transmission shaft damage. And at high engine speeds, low winter temperatures, loss of viscosity, caused by oil in the hydraulic cylinder is more prominent; transmission shaft installation clearance is too small, the pump dynamic balance, an oil passage is blocked and serious overloading, caused by shaft deformation, damage. When the pump shaft is deformed or damaged, should be timely maintenance and replacement, should always pay attention to avoid the occurrence of damage to the drive shaft work, such as unloading and ready to travel, and confirm the disengaging force taking device is disengaged after driving; full lifting, lifting the handle mentioned position, the operation should be smooth, action not rude, slowly release the clutch pedal, the pump operation, so that the car in the car slowly rising; load drop, avoid the distribution valve to pull the lifting position, this can easily cause a strong impact, resulting in premature failure of the drive shaft; in addition, should always check the transmission shaft installation space whether it meets the requirements, the drive shaft engaged with the universal joint fork length is suitable. |