汽油链锯使用注意事项（Considerations for gasoline chain saws）.doc

汽油链锯使用注意事项（Considerations for gasoline chain saws） The air inlet pipe end of the cylinder is in the same direction as the notch of the crankcase high tension line. 5. the magnetic motor flywheel and cooling fan must be removed by the puller. After the flywheel has been installed, it must check the quality of the semicircle key and check whether it is in the keyway. 6. when the piston, connecting rod and crankshaft are loaded into the front and rear crankcase, the front and rear crankcase must be heated to 170 DEG C in oil, and keep 3min. Press the right ball bearing on the moving parts immediately after taking out. Install the rear crankcase first, and then fit the front crankcase. 7. the crankcase is generally not allowed to be disassembled. If it must be removed, the insulating varnish must be painted to keep it sealed before and after installing the crankcase face of the crankcase. 8. heat engine is strictly prohibited disassembly. Three, the gasoline engine used for a long time, repair gas power appear insufficient, speed can not go up, replace piston ring cylinder compression force poor; oil, usually needs cleaning; circuit, the spark plug, the ignition coil, capacitor breaker, check and adjustment. Remove the muffler before starting, and the carbon in the exhaust hole at the cylinder block should be removed and check whether the muffler is blocked. Check the carburetor oil needle adjustment is normal, the oil surface is too low, otherwise it will cause power shortage, speed does not go. If the press is still not good repair, then check whether the crankcase oil seal, leakage. Check when the first cylinder removed, with clean gasoline into the crankcase, a hand piston, a hand crank, see whether there is oil seal and the crankshaft joints such as gasoline exudation, that seal wear, need to be replaced. Four, gasoline engine operation, the carburetor jet serious repair, first check the muffler is blocked, the cylinder exhaust hole whether the accumulation of carb