How to maintain the trucks with the first four and the last eight?

Just follow the normal maintenance of the truck. Truck maintenance is generally divided into one guarantee, two guarantees and three guarantees. \x0d\ 1。 Inspection items for maintenance of first-class vehicles \ x0d \( 1) Replace engine oil, oil filter, gasoline filter and air filter. \ x0d \(2) Check the liquid level of battery and glass washing tank. \ x0d \(3) Check the liquid level position of the brake and clutch. \ x0d \(4) Check whether the vehicle coolant level meets the requirements. \ x0d \(5) Check whether the oil level of the power steering oil tank meets the requirements, and check whether there is oil leakage at the oil pipe joints of the system. \ x0d \(6) Check the tightness and aging of the belts of the generator, air conditioner, water pump and booster pump \ x0d \(7) Check whether the front and rear lights of the car are complete (including headlights, width indicator lights, turn signals, brake lights, backup lights and fog lights). \ x0d \(8) Check the tire pressure and wear of the automobile, tighten the tire screws according to the specified torque, and the tire pressure shall be added to the specified value of the vehicle model, and the tire shall be transposed according to the wear. \ x0d \(9) Check whether the automobile exhaust emission is up to standard. \x0d\ II。 Inspection items of vehicle secondary maintenance \ x0d \( 1) After the engine passes the three cleaning and three filtering operations, it should be easy to start, run smoothly, exhaust normally (referring to the exhaust gas reaching the standard), meet the requirements of water temperature and engine oil pressure, rotate smoothly, have no abnormal noise, have moderate belt tension and have no four leaks (water, oil, electricity and gas). \ x0d \(2) The free travel and toe-in in the direction meet the requirements, the steering is light, flexible and reliable, and there is no left-right swing and deviation of the front wheel when driving. \ x0d \(3) The free stroke of the clutch meets the requirements, with convenient operation, complete separation, stable and reliable combination, no abnormal sound and no oil leakage in the hydraulic system. \ x0d \(4) Transmission devices such as gearbox, drive axle, universal joint (or half shaft). Good lubrication, reliable connection, no abnormal sound and overheating, no tripping, flexible gear shifting and no oil leakage. \ x0d \(5) The free travel of the brake pedal and the intermittence of braking meet the requirements, the driving and parking brakes are good, and there is no deviation and delay during braking. The inertia proportional valve works normally and there is no oil leakage. \ x0d \(6) Tire pressure is normal (different models have different high and low pressure standards). \ x0d \(7) Cantilever and damping are fixed reliably and function normally, and the temperature of hub bearing is not too high after driving. \ x0d \(8) The generator, starter, lights, instruments, signal lights, buttons and switches are complete and can work normally. \ x0d \(9) Fill all lubricating points of the whole vehicle with lubricating oil. \ x0d \( 10) Wash and clean the whole vehicle. \x0d\ III。 Three-level maintenance inspection items for vehicles \x0d\ The key points of three-level maintenance are assembly disassembly, cleaning, inspection and adjustment. \x0d\ 1。 Engine maintenance: \ x0d \( 1) Disassemble the engine, clean and check all parts: the cylinder block and cylinder head should be clean and free of carbon deposit, oil stain and scale; The oil circuit is clean and smooth. \ x0d \(2) The unevenness of the cylinder head shall not exceed 0.05 mm per 50 mm long plane. \ x0d \(3) The valve seat shall not be lower than 0.5mm of the cylinder head plane (whichever is the highest point). \ x0d \(4) The cylinder bore taper and roundness of the cylinder block shall not exceed the limit. \ x0d \(5) Grinding valve: The contact surface should be smooth and well sealed, and there should be no air leakage. \ x0d \(6) Replace the piston ring as required. \ x0d \(7) Check the clearance between crankshaft main bearing and connecting rod bearing. If the gap is too large, it can be adjusted; \ x0d \(8) If the bearing bush is damaged or the journal is worn, replace and regrind the bearing and journal. \ x0d \(9) Removing carbon deposit; Can use scraper, shovel (or bamboo), metal brush to remove, also can use carbon scavenger to remove. \ x0d \( 10) Replace the cylinder head gasket. \ x0d \( 1 1) Measure cylinder pressure: check engine speed. \x0d\2。 Chassis maintenance: \ x0d \( 1) steering mechanism; Flexible steering, no bending and cracks in horizontal and straight pull rods, intact threads and keyways, flexible rotation, complete locking devices and tight bolts. \ x0d \(2) Disassembly and inspection of steering gear: disassembly and inspection, cleaning and replacement of damaged parts. After assembly, it should rotate flexibly without jamming, and load test should be carried out. \ x0d \(3) Dismantle and check the hand and foot brakes, and implement them according to the requirements of secondary maintenance. \ x0d \(4) Check that the threads of each pipe joint and tee pipe should be intact, tightly combined and without leakage. Check the brake hose, and do not rub or collide with adjacent components: the hose shall not be damaged, leaked, bulged, layered or stained with oil.