How to maintenance of diesel engine fuel injection pump quick-wear part - Out of the oil and gas valve couple

　( Out of the oil and gas dynamic coupling parts easy to wear and tear parts
(1) the easy worn parts of oil and gas moving valve: seal cone, decompression band and the cylindrical guide, among them, the seal cone and decompression band are more likely to wear. Pneumatic seat is easy to wear and tear parts:
(2) in a sealed cone and guide hole.
　　( The impact of oil and gas dynamic coupling parts wear after
the oil and gas dynamic seal cone valve couple after wear and tear, the sealing performance will be worse. When the pump work, can cause high pressure tubing inside part of the diesel Tian Liu to plunger set inside, oil pressure of high pressure diesel fuel cut-off significantly reduced. When the fuel injection pump fuel injection for the second time, diesel fuel from a low oil pressure used to the injection pressure increased time increases correspondingly, so the injection time lag, the oil will reduce accordingly at the same time.
decompression ring wear, cause it and read the hole of the fit clearance increases, try moving valve in the oil and gas lift decreases in the process of oil supply, decompression effect is relatively lower, fuel injection pump fuel cut-off and fuel supply in the high pressure oil pipe residual pressure of diesel oil, diesel oil increase. Diesel engine running speed will also appear when instability, lack of power, fuel consumption increase, etc.
　　( Appearance inspection items and leak test method between oil
the oil and gas dynamic coupling parts appearance inspection items are as follows:
(1) the oil rich decompression band are not allowed to have obvious traces of wear.
2. The oil and gas dynamic cone valve seal is not allowed to have obvious traces of wear or metal flake and longitudinal scratches, etc.
(3) out of the oil and gas valve and the oil and gas dynamic seat cone there is no obvious corrosion phenomenon.
　　( The sliding of oil and gas dynamic coupling parts inspection and repair method:
(1) sliding equivalence checking will clean the oil and gas dynamic coupling parts vertically, and then drew out the oil rich in vertical position/length, after the rotation at any Angle to loosen the oil and gas valve. If the quality of oil and gas dynamic valve can rely on their own free to read on, as a qualified; If in the process of slide block phenomenon, is considered not qualified.
2. Repair method: the oil and gas dynamic coupling parts cone sealing after the variation, but will be out of the oil and gas valve between the grinding machine, and then in the oil and gas moving valve seal coated with a thin layer on the cone grinding paste, with the hand holding a reading with the oil and gas dynamic valve by us, and then start the grinding machine grinding. No grinding machine, also can be used in the dynamic method for grinding.