Car thread obd2 android Vice securely connected or not directly affect the use of the car and this locking measures in the design of the car, friction locking spring pad locking, the preload locking or specially since locking threads, etc.; mechanical locking with locking cotter pin, locking plate locking fuse locking.
1, spring washer should be good elasticity, suitable size
Spring washers are easy to install, low manufacturing cost, and is widely used in the automobile. It is the use of the elastic deformation of the gasket, so that the axial direction of the screw vice tensioning gasket beveled tip also contribute to the anti-loosening. However, car code reader this washer during use due to heat or long compression lose their elasticity. Therefore, before installing spring washer, you should check whether the failure of its flexibility. Check is to look at the two ends of the gasket at the interface whether or shifted up and down a certain angle, this washer hexyl VALID if the stagger angle is small or not staggered. Washer size should correspond with matching bolt size washer outside diameter slightly kid nut outer diameter appropriate.
2 cotter pin length should be appropriate and engine connecting rod connecting bolts loose, cause connecting rod bearings Songkuang, the engine produces abnormal noise, or even damage to the engine-related parts. Decomposition abnormal sound check some of the connecting rod bearing failure, often found individual locking nut on the bolt connecting rod cotter pin has gone, the reason is mostly due to the cotter pin is car diagnostic tool too long, high-speed movement of the crank arm scraping hit break, finally shedding. The method of determining this cotter pin of the correct length is a cotter pin inserted through the corresponding hole of the lock nut, the percussion hammer in place by hand, the cotter pin projecting does not exceed the length of the crank arm plane, and then required the cotter lock i.e. can.
3, Disc spring washer assembly should be directed to
The disc spring gasket on the mechanical surface will not produce more scratches, thus increasing use in the car, but if improperly installed, will not serve to prevent the thread loose collaboration with. For example the second axis of the: Dongfeng EQ1090 car transmission rear flange locking spring gasket installed between the nut and OBD2 Code Scanner the flange dish dread, if improperly installed resulting in the nut loose, cause the speedometer drive gear slipping the odometer speed indication and Mileage errors. Meanwhile, around the second shaft traverse so as third gear skip shift occurs. The correct orientation should be of the belleville spring washer concave surface facing the connecting member, the convex surface facing the nut. Thus tighten the nut, since the belleville spring washer is deformed by force, the support surface by reaction force play lockup role.
4, the insurance should be correct wire taut direction
Some parts of the chassis of the vehicle (eg, shift forks and shift fork shaft connecting bolts) insurance wire to prevent screw loosening, it is commonly used in the threaded locking bolt group. The insurance wire locking more reliable insurance wire size selection and penetration of the screw holes taut direction, but the installation should pay attention. Insurance wire is too rough is not easy to go through, the diameter should be slightly smaller than the diameter of the perforations, when a slight resistance can be interspersed. Wire penetrate right direction of the difference between insurance: the to a bolt Loosen insurance wire in a taut state, that unscrew the two screws tighten a bolt will be its adjacent right otherwise incorrect.
5, the locking MB star plate should be locked in the side plane of the nut
Larger pieces on the car nut locking constant locking of the locking plate, such as automotive steering knuckle lock nut transmission the second axis of the front locking nut. Locking tabs lock nut torque required to tighten the locking tabs off to the one side of the plane of the nut with a hammer to fit snugly against. Locking plate must not be attached to the edges and corners of the nut, so that is not good to play the role of the locking.
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