Scientifically determining the mileage intervals of various maintenance operations can not only keep the HOWO truck in good technical condition, but also save some unnecessary trouble. Generally speaking, if a new HOWO truck is in good technical condition and used under good operating conditions, the maintenance period can be appropriately extended; while if the car is in poor technical condition or the operating condition is poor, the maintenance period should be shortened appropriately.
1.Adjustment of hydraulic system The pressure of the entire hydraulic system has been adjusted before leaving the factory and is generally left untouched. If there is any change, adjust it as follows. After connecting the oil pump, you can place the lifting lever of the multi-way valve in the lowered position, and slowly rotate the adjustment handwheel of the overflow valve in the multi-way valve so that the system pressure is at the reading level. Stop when the number reaches 100kgf/cm2, then tighten the locking nut and loosen the multi-way valve stem.
2.Maintenance and inspection of the oil tank and oil-gas separator for vacuum pumps The vacuum pump is a scraper-type frictionless vacuum pump that requires oil lubrication and sealing. Oil and water easily evaporate in a vacuum state during operation. Therefore, the gas discharged by the vacuum pump is a mixture of oil, water and air. In order not to pollute the air and save lubrication oil, which must be separated. The function of the oil and gas separator is to separate oil, water and air. Therefore, after working for a period of time, water will remain at the bottom of the separator. It must be drained after the operation is completed, otherwise it will be sucked into the pump and cause sintering failure. After the engine oil is used for a long time, the viscosity will decrease, which will affect the air tightness and lubrication effect. Therefore, the oil must be changed regularly. In addition, pay attention to replenishing the oil. When the vacuum degree is 600mmhg, the oil level should be below the lower line of the dipstick. Pay attention to adding oil once every 50 hours of operation. Clean the interior once a month, Filter when refueling, and the filtration precision should not be less than 550μm.
3.full tank automatic alarm device There is an alarm bag installed on the upper part of the tank. The inside should be cleaned once a month, especially the valve seat and wire mesh should be cleaned thoroughly.
4. Maintenance of tank door locking device After long-term use, dirt will form inside and it will be difficult to lock the tank door. Therefore, the inside should be disassembled and cleaned every 6 months and lubricated.
