How many engine is not torn open do not have big thing
Tore open reshipment puff and blow to take asthma trend to discard as useless?
Repair derv engine strategy,
Size car is current, travel please
An eligible diesel engine repairs personnel
This 8 big toll-gate must enter the past
The first close: "3 leakage " close
When repairing diesel engine, prevent and cure and solve " 3 leakage " problem, can adopt " 5 words " criterion, namely severe, clean, , grind, close.
Severe: To the spare parts disassemble and install, want strict requirement, abide by operating rules, forbidden chaos throws into confusion knock, if want to press order and distinguish close firm when pigheaded bolt, do not have ordinal chaos to twist, in case the spare parts is out of shape.
Clean: Before component is assembled, must clean and clean, take strict precautions against interfuse impurity. What be in interfuse minimum like delivery valve and clitellum of valve base contact is sundry, can leak not only oily, still affect the work of engine directly.
Wipe: In asbestine mat, paper is filled up and the leakage oil of all sorts of snail a place of strategic importance is in daub fluid sealant. Want when wiping asbestos oil thin and even, not too thick, also do not wipe the whole area of mat on, what want daub leakage oil only is local.
Grind: Abrade or the combinative scale of milling spare parts, its action is those who restore the face is bright and clean spend and precision, after making vitta connect or spacer abrade, can keep sealed, do not leak oily.
Close: Of seal unit spend closely should appropriate, cannot be tightened too or loosen too, all sorts of interface that are like diesel engine and sealed nut, what must keep appropriate is close degree.
The 2nd close: Cylinder pressure closes
To assure to have enough cylinder pressure, of piston and cylinder bushing cooperate clearance, clearance of the end of piston annulus, edge must accord with a requirement, spiracle and the sealing that enrage front of the sealing of portal, fuel injector are close friends, cylinder mat is close friends, and ply accords with a requirement.
The 3rd close: Firebox cubage closes
After diesel engine classics is repaired, often meet enkindle room volume produces change, change original compression ratio, affect the regular job of diesel engine directly, the element that firebox cubage changes has: Piston position outfit is turned over, cylinder cushion is large undeserved, mechanical wear of brace connecting rod or bend, swirl chamber sets an amlposition, spiracle sinkage passes to wait greatly, when repair, answer these circumstances to try to notice.
The 4th close: when close
when close include to offer oil when and distribute gas when, if offer when oil is frame-up, when be like inadequacy distributing gas, can create vehicle bad to start, if start spiracle to shut constrainedly lax, or spiracle head bumps a piston, in the meantime, companion has engine to shake, exhaust color is frame-up.
The 5th close: "3 filter " close
Out of order of air filter technology, can make dirt enters spiracle. Quickly piston annulus, cylinder, valve and gas portal are inchoate wear away, cause the difficulty that start, power drops. Out of order of technology of filter of derv, engine oil, can make foreign matter enters concerned component between, cause 3 big nicety occasionally inchoate wear away, quicken crankshaft and plain bearing liner to wear away, serious person can cause diesel engine inchoate discard as useless.
The 6th close: Derv pulverization closes
Force plunger deputy, delivery valve deputy reach fuel injector needle deputy technical out of order, all can cause fuel injection pulverization undesirable, make diesel engine starts difficulty, combustion is not complete, carbon deposit grow in quantity, power of engine of as a result drops, oily cost raises, accordingly, it is to fuel, especially nicety idol should undertake checking seriously.
The 7th close: Via and alveolus close
(1) when via is being installed, the 5 point that via closes bearing, lining should are opposite.
A, headstock, every go up to drill hole having oil to headstock oil groove, the oil that goes up with neck of cylinder body, main shaft respectively also is interlinked, when installation, the flange separation that wants headstock only aims fixed position to sell, can prevent headstock to turn, make sure oily aperture is aimed, make lube road straightway, avoid to burn out.
Lining of B, rocker. When entering lining to rocker internal pressure, if aperture is incorrect accurate, rocker arm shaft and lining are met for lack of lubricant, do attrition and burn caustic to make spiracle clearance greatens, produce serious knock sound.
Lining of C, connecting rod. Connecting rod is small drill hole of oil having market, be interlinked with the oily aperture of connecting rod lining, when be being covered to copper of connecting rod is small liner, if two oily aperture are incorrect accurate, copper is covered and piston pin happening " should become " knock sound, bite dead even.
The D, bushing that start is covered, when installation starts axial lining, the collect oily groove that two lining oily aperture should part to build photogenic correspondence with airframe and gear is interlinked, start axis and lining to be able to be accelerated otherwise wear away, cause the angle that offer oil and deserve to enrage phasic change, bring about diesel engine power to drop.
(2) alveolus closes to basically have the following 4 alveolus
A, gasoline tank builds blowhole. After this aperture jams, gasoline tank is interlinked with atmosphere no longer, gasoline tank upside drops because of fat face meeting occurrence negative pressure, cause interrupt for oil; Evaporate after fuel be heated, make force of gasoline tank internal pressure elevatory, can cause gasoline tank switch to be in leakage oil, accordingly, this aperture cannot be blocked up.
Loophole of B, crankcase, after loophole jams, the waste gas inside crankcase accumulates more more, the atmospheric pressure inside crankcase is elevatory, can make engine oil leakage, engine oil of interfuse of expensive wet waste gas, still can accelerate engine oil metamorphism, quicken parts to wear away, accordingly, when be being maintained must dredge this aperture.
Oily opening of release of C, fuel feed pump. The release oily opening on fuel feed pump jams, can bring about a few derv leakage between push rod and conduit to enter fuel injection pump, the lube inside diluent housing, quicken a spare parts to wear away, accordingly, this aperture also cannot be blocked up.
Spilled water hole of D, water pump, if this aperture jams, the water platoon of leakage does not give pump housing, enter bearing inside, can quicken the attaint of bearing, accordingly, when the overhaul must dredge this aperture.
The 8th close: Adjust close
(1) cold adjust. Debus fuel injector, drive diesel engine to run with outside force, check engine oil pressure and each place temperature at the same time, notice to listen attentively to each component sound, cold after adjusting, take the advantage of when temperature is high, discharge engine oil, clean engine oil filter and oil duct.
(2) hot running-in. Without bear hot running-in, notice circumstance of diesel engine job and each place noise; Press formulary load and time hot running-in, the blow-by that often notices each place sound and engine oil mouth, smoke evacuation, fuel injector returns the case such as oil, discover the problem should eliminate in time.
