Agricultural machinery parts assembly key points and matters needing attention

Key points and matters needing attention of agricultural machinery parts assembly - 2020 11 - 18 1, have chamfer parts (1) valve guide: have chamfer should be loaded at the end of the cylinder head, exhaust hole, into the valve head, so can reduce airflow resistance. Upside, into the exhaust duct, cross-sectional area, inlet and exhaust resistance increases, the working condition of diesel engine deterioration. (2) outside the oil pump rotor, outer rotor should be have one end of the chamfering toward the shell. Put wrong, will affect the oil pump oil pressure and oil. (3) drive gear: should be in the drive gear spline machining has 30 & deg; One end of the chamfering towards driving wheel side, put wrong cause early 207 bearing damage. 2, bearing, bushing, agricultural vehicles, tractors, diesel engine with the bushing on the majority of processing small holes, its role is to guide the oil into the movement part of the shaft and bushing. Has a small hole liner, such as: starting shaft bushing, rocker arm bushings, spindle watts, etc. , the corresponding body also has a small hole and channel, when installation should be aligned with each other. If no part corresponding to a hole or tunnel, such as separation, holes should be brought up, for easy filling. Bearing such as clutch with dust cover 60204, 60206, bearings, etc. , with one side of the seal should be toward the platen, in case the butter into the skid. 3, shaft, shaft seat some shaft and shaft seat looks don't seem to need to tell direction, such as the governor gear shaft, rocker arm shaft, etc. , should be installed according to the direction, actually. Governor gear shaft hole end should be pressed into the body, the two holes down, make the holes of the oil spill into the governor gear shaft through the inner hole into the gear bushing. Rocker arm shaft when installation, seam side down, avoid the valve push rod brush touch guide hole of cylinder head. 4, cylinder liner, pressure plate, from the power plate (1) cylinder gasket, cylinder pad package edge side toward the cylinder cover, can enhance sealing, director of the life. (2) the fuel injector linking piece: flat side outwards, with the bevel side of the lever principle, balance tighten mother of pressure, at the same time to prevent the loose end nuts, bolts and air leakage. (3) driven disc, clutch platen middle convex platform, two convex platform shall be installed back, which is towards the pressure plate, in order to prevent the separation is not complete. 5, tie rod joint inner hole should be to turn the right of the left thread rod joint is installed on the right side of the tractor ( The direction) To ensure the assembly after the adjustment before the needs of the beam. 6, holding three variable box fork shaft positioning groove in the middle of the fast gear fork shaft, the front should be installed in the transmission fork shaft hole, the positioning groove spacing of the larger end toward the right side of the box body. Low gear fork shaft and vice shifting fork shaft of three positioning slots are at one end of the shaft, but the positioning groove spacing is different. A low gear fork shaft positioning groove spacing is small, in case the middle fork shaft hole, positioning groove near the box on the right side; Deputy shifting fork shaft positioning groove spacing the former slightly larger, loading fork from the end of the transmission shaft hole, the locating slot near the box on the left. 7, the crankshaft after the end of 4125 diesel engine crankshaft oil seal shell back-end oil seal shell type separately, is composed of two shells, the middle two; (4) the oil return hole, shell, no oil hole. If the wrong direction, will cause not oil return, because this is when installation, should put the two; 10× 40 joint bolt from down to up screw-in shell with internal thread, not threaded for the shell. 8, the valve chamber cover has 4125 a type of engine valve chamber cover cover with the courage of crankcase pipe, a lot of machinist during assembly or repair personnel, often think of exports are the engine's exhaust pipe of the vent. Because of the exhaust pipe ambient air temperature significantly higher than that of exhaust gases from the vent to the cold air convection movement, the emissions increase resistance. The correct assembly method is: will export back to the engine exhaust pipe of the vent. 9, vertical type 195 diesel engine cylinder head bolts, cylinder head bolt is a standard thread at one end, the end is fine thread, with one end of the standard thread is screwing in the body. Double is the same thread bolt, the shorter side should be screwing in the body. 10 piston ring, piston ring, piston, connecting rod big end: small taper ring end toward the piston head, twisted ring should be round chamfer at the liability on the piston top and some on the piston top near the open end 'on' or 'T', this side should be toward the piston crown. Piston, piston at the top is dicotyledonous stems should be toward the direction of fuel injector. Connecting rod big end: a S195 diesel engine piston connecting rod set is installed on the body, the connecting rod big end & 45 deg. Profile should be down. 11, tires, tire chain: tractor driver of tyre is' man 'or' eight 'glyph zigzag pattern. When installation, look from behind the tractor driver tyres decorative pattern, 'man' or 'eight' zigzag pattern should be facing up. Also some tires marked with arrows, the arrow when installation should progress toward tire rotation direction. Chain: three rounds of agricultural chain joint with spring card, must make its weapons side direction in opposite direction with the chain, so as to avoid the collision in the movement and make the CARDS fall out. Oil pan dongfanghong - 12, clutch 75 type tractor on the main clutch platen dumped oil pan, before is to prevent the main clutch bearing too much of the butter into the friction disc surface. When installation, jilt oil before dealing with the clutch shaft bearing ( The forward direction) , which can make too much butter left into the groove of the flywheel, and along the inclined hole into the main clutch shell, so as not to affect the normal work of the main clutch. （ Source: gansu agricultural information network)