Stop and think how many times each link passes over the bar. About 25 meters of chain passing through each point of the bar every second. After an hour of work comes to spend more than 100 km chain. This speed and lubrication that are small, makes the chain and bar wear suffer under normal conditions of use. When there is unusual wear is often the case for lack of maintenance evident. The failures are usually a bad sharpening the chain, low voltage or inadequate lubrication for the working conditions. Normally you can see the status bar watching the erosion of the bottom of the links in the chain. A frequent review of the state of the chain may indicate the need for maintenance of the bar. Solve problems immediately may prevent damage by replacing the chain, bar or both. 1. If the bottom of the links is weak (shaded) bar slot does not have enough depth in it somewhere. (See figure A). 2. If the wear on the bottom of the chain has a concave shape, the bar groove is not deep enough at the tip of the bar. The material of the tip of the bar is worn excessively. (See Figure B). First tension the chain. Then place a rigid bar and pressing the cutting link. Push to try to support the fully rigid rod moving the cutting tooth. It should be a distance of 1.5 mm to 3.2 mm between the rigid surface and the end of the bar. The string must stay upright on the bar, if there is no need to change the bar as well. 2. Maintain a proper width and depth in the bar groove. The slot may be between 0.05 mm and 0.13 mm wider than the gauge (thickness of link power) of the string you use. The groove depth should be between a maximum of 10.7 mm and a minimum of 7.9 mm. (See Figure G). 3. Check that the bar has not bent slightly. A bar may be bent slightly by accident without realizing the operator. The bent bars must be straightened immediately to avoid possible damage to the bar and chain. 5 .- Periodically clean the bar groove and lubrication holes. Symmetrical bars turn the bar to wear on both sides of the same way. 6 .- Adjust the chain tension properly, the voltage should be the top that allows the chain to move the bar by hand. Check chain tension frequently, but always with the cold chain. More than 85km / h in 4 hours of work spend more than 300 km of the bar chain. If kept in good condition and chain bar, with proper lubrication will keep your computer in perfect condition.

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