Automotive fuel pump seal precautions top nine points :
1, the general mechanical seal for cleaning , without suspended granule media. Therefore, piping systems and installation of new tank should be carefully rinse to prevent solid impurities into the surface using mechanical seal seal failure .
2, and crystallization medium, the use of mechanical seals , pay attention to frequent washing, before re- starting after stopping crystallization To clean the mechanical seal .
3 , the mechanical seal should be carefully disassemble , Freeze hand hammer, iron and other percussion, so as not to destroy the static ring sealing surface.
4, if there is not split down the dirt , do not avoid strong to dismantle , should seek to remove dirt, Rinse , and then demolished, in order to avoid damage to the sealing element .
5 , before the installation of mechanical seals , sealing elements should be checked whether all the failure and damage , if any, should be restored or replaced with new components.
6 , should be strictly checked ring and the stationary ring of the seal face wear .
7 , the assembly should be taken to remove bias, when tightening the screws , tighten evenly to avoid skewed, so seal failure.
8 , the right to adjust the amount of compression of the spring , it will not be too tight or too loose , too tight , seal face wear and failure soon , but the rate of consumption or large ; too loose, the seal does not work, excessive leakage . Therefore , after the pump is installed, when the pull of the rotor by hand , the seal should feel a certain amount of compression of the spring , but also light and flexible rotatable spool has clenched feeling. If you feel tight or plate does not move , you should loose some appropriate adjustments .
9 , on the external mechanical seal flush , starting preceded open the seal cavity filled with fluid sealing liquid , parking , first stop the pump , after sealing off fluid .