Master the performance specifications and application requirements of auto parts

2019-12-16 11:31:33

Key points for replacement of auto parts:

(1) try to use sealant. If necessary, paint can be used instead to achieve the ideal sealing effect.

(2) check the appearance quality of rubber seal carefully before assembly; use special tools to press fit to avoid deformation by knocking.

(3) fill lubricating grease according to regulations, clean and dredge vent hole and check valve regularly.

(4) assemble under extremely clean conditions, and the working surface of parts shall be free of bumps, scratches, burrs and other attachments.

(5) strictly follow the operation procedures, and the seals shall be installed correctly to prevent deformation if they are not in place.

(6) master the performance specifications and use requirements of seals, and replace the failed parts in time.

(7) for thin-walled parts such as side cover, cold plate correction shall be adopted; for shaft hole parts easy to wear, metal spraying, welding repair, gluing, machining and other processes can be adopted to reach the original size.

(8) if the sliding thread of the nut is broken or loosened, repair or replace it with a new one, and screw it to the specified torque.

All auto parts shall be stored in the warehouse or covered dry site, free from harmful gas erosion and impact, and shall be well ventilated, and shall not be stored together with chemicals, acid and alkali materials.

The storage warehouse shall be kept within the range of relative humidity of no more than 75% and temperature of 20-30 ℃. For rubber products, especially for rubber mending, they should be stored in a special warehouse which can keep the ambient temperature no more than 25 ℃, so as to * * ensure safety.

For electrical accessories, rubber products accessories and glass products accessories, due to the small self weight of these accessories, they are light throwing materials, which can not be collided and stressed, otherwise, the working performance of these accessories will be inaccurate, deformed or broken, so a special warehouse should be set up for storage, and the safety of accessories should be paid attention to during stacking.

For the storage period of the engine assembly, if it is more than half a year, maintenance must be carried out; one way is to remove the spark plug (gasoline engine) or fuel injector (diesel engine) from the cylinder head, and inject a little vehicle oil into the screw hole, so as to keep the friction pair parts in the cylinder with good lubricating oil film and prevent long-term oil shortage and rust. If it is more than 1 year, in addition to the above maintenance, the engine oil shall be added into the cylinder, and then the battery shall be used to start the starter to drive the crankshaft to rotate for several seconds, so that the lubricating oil film can be coated more thoroughly and evenly on the cylinder wall of the piston stroke, and then the spark plug or fuel injector shall be screwed on.

For storage of the battery, it is also necessary to prevent excessive overlap and collision, to prevent the electrode and cover from being damaged due to heavy pressure, and to pay attention to the sealing of the electrolyte plug to prevent the invasion of humid air. As for the storage of plates, the warehouse should be kept dry. The storage period is generally 6 months, which must be strictly controlled.

For accessories such as cork paper, felt oil seal and velvet or cloth door and window fillets that have exceeded the storage period for more than half a year, in addition to keeping the storage site dry, camphor balls shall be placed in the packing box of felt oil seal or cloth groove to prevent mildew and moth damage.