Engine maintenance matters needing attention

Note 2020 - engine maintenance 04 - 30 a, repair the engine basic requirements: 1, clean, clean, clean again. 2, pure accessories. 3, correct the mounting steps. 4, the structure of the right size. 5, correct maintenance tools. 6, the correct tightening torque. 7, the correct test. 2, remove the matters needing attention: 1, first put dry oil, coolant, diesel. 2, some parts need to be labeled, must first as ( Radial components, components, connecting rod, connecting rod shaft parts, piston components, valve group, engine also requires timing marks) 。 3, the same system parts are put together. 4, all kinds of pipe shall not be bent. 5, precision parts, such as piston, fuel injector, watts, cylinder head don't directly on the ground and should be on flat wooden platform, bedding or dedicated stent. 6, check whether clean all parts can be measured in, if discover the need to replace the parts should be stacked, so that preparation. 7, need to use special tools to remove some parts, such as cylinder liner, valve, etc. Three, the points for attention during the cleaning: 1, remove gasket residues. 2, choose the appropriate cleaning agent. 3, with high-pressure air blow dry. 4, all the parts clean. 5, rustproof, dustproof protection waiting for assembly. Four, the points for attention during the assembly: 1, the new parts assembly data. 2, all the seals should be replaced. 3, bolt fastening sequence with 'star method' cross from inside to outside. 4, all bolt torque on the step by step, such as main bearing bolts, connecting rod bolts, cylinder head bolt, fuel pump, etc. 5, the old tile, transmission parts, cylinder set back in place. 6, lotus root parts shall not be interchangeable, such as connecting rod, rod body, main shaft bearing, etc. 7 the transmission, when installation, lubrication part. ( Tile back never lubrication) To inject a certain amount of oil in the oil pump. 8, the correct assembly of the main bearing cover assembly direction, the direction of the piston, connecting rod assembly. 9, transmission system requirements on timing ( The camshaft gear and the crankshaft gear, fuel pump gear and the camshaft gear) 。 10, some parts to test (after installed The clearance between the crankshaft and connecting rod head, axial clearance of the crankshaft and camshaft axial clearance, camshaft gears back lash, injector outstanding amount, the depth of the piston ring, valve clearance) 。 Only guarantee the accuracy of the maintenance technology parameters and parts cleaning, and in the correct assembly process of assembly, engine maintenance quality can be guaranteed. （ Guizhou highway engineering group co. , LTD. Set tube SiLiang silver fly)