Part 1
Electrical system breakdown
1, accumulator n is insufficient, answer to charge in time to accumulator right now, check height of accumulator fluid face, seasonable compensatory electrolyte comes formulary height. If discover accumulator ageing charges undesirable, should change accumulator, notice the daily attention of batteries at the same time, do not let accumulator often be in short report state.
2, trouble of the engine that start is maintained or change the machine that start.
3, dynamo breakdown is maintained or change dynamo.
4, circuit breakdown checks circuit and repair.
Part 2
Start trouble of engine oil road
1, vapour lock of low-pressure oil path
Below the pump action of fuel feed pump or gush oil pump, fuel sends high pressure pump via low-pressure oil path by gasoline tank. If low-pressure oil path closes lax, or oily area is too small inside gasoline tank, and car tilts park and travel, air can take the chance to enter oil path; If air temperature is high, fuel evaporates, also can form vapour lock in low-pressure oil path, cause engine the job is flabby, automatic flameout or engine cannot be started.
2, oil path jams
The common position that oil path jams basically has filter of the oil absorption canal inside gasoline tank, mesh, derv, gasoline tank to build blowhole to wait. Creating the main problem that oil path jams is infuse the derv that does not accord with a standard, or in impurity of the infiltrate in cheering a process. Preventing a key is to make sure derv cleanness and oil path are sealed, into go by to oil path constant sex maintains, the cleanness that strengthens pair of derv filter maintains, be cleaned in time or change filter core, undertake in time cleaning to gasoline tank according to work ambient conditions, the greasy filth of bottom of complete purify gasoline tank reachs moisture.
3, the breakdown of fuel injection pump
Force plunger of fuel injection pump and delivery valve occasionally wear away serious, cause engine to start difficulty. Should change in time right now force plunger and delivery valve occasionally.
Part 3
Grab job is faint
1, engine power is enough, movement is normal, and grab operating speed is slow, mining is faint.
2, the hydraulic pump of grab is pump of variable force plunger more, the job is regular after time, the generation with pump interior inevitable spare parts wears away, cause inside leakage, each parameter data is not harmonious, bring about discharge insufficient, oil is lukewarm exorbitant, rate is slow, cannot build a maximum pressure, the start is slow and so weak. To this kind of problem beard debus hydraulic pump undertakes data is measured, affirm the problem is in, change the fittings that cannot continue to use, or the fittings that repair can continue to use, stage of check of the captain after be being assembled afresh is debugged, match each loop parameter (the) such as pressure, discharge, power and variable.
3, component of a significant hydraulic pressure - multichannel allocation a powerful person, have above advocate 2 relief valve, a powerful person, overflow a powerful person, filling oil a powerful person. If the pressure of standard of pressure short of of set of these place of a powerful person is brought about,dig faint. Additional, between the lever that be like a powerful person and aperture of a powerful person because wear away and gap is too big, lever of a powerful person answers a not complete, inverting not to reach the designated position, many inside leak, bring about discharge inadequacy, rate is slow. This kind of problem, ought to debus multichannel allocates a powerful person, send experimental stage to undertake debugging, pressure of reset place valvate comes standard pressure, the between gap that eliminates lever of a powerful person and aperture of a powerful person can.
4, the hydraulic pump on entrance grab all deserves to have forerunner gear pump, this pump basically is to participate in the variable of hydraulic pump and the lever of a powerful person that open multichannel allocation valve as forerunner oil to make its inverting. If gear pump wears away excessive the pressure with build the short of of relief valve set that does not remove constant pressure or gear pump to go up constant, can bring about hydraulic pump to be in low flow position from beginning to end, lever of a powerful person also cannot complete inverting, cause discharge inadequacy, the start is slow, pressure is insufficient, mining is faint. To this kind problem, simply should change forerunner gear pump or reset forerunner relief valve can.
5, everything is normal when cold machine, the start when heat engine is slow, mining is faint. Appear such problem shows fittings of hydraulic pump interior wears away serious, must change inside pump fragile, assemble afresh, on debug stage desired result.
6, grab is overall occurrence job is slow and faint another of the phenomenon main reason is metamorphism of hydraulic pressure oil, accordingly, should notice oil of monitoring hydraulic pressure is oleaginous (viscosity, fluidity and have wait for) without suspension content, change on time the hydraulic pressure that accords with a regulation is oily, with respect to the happening that can prevent this kind of breakdown greatly.
Part 4
Grab walks sideslip
1, hydraulic pump has trouble
Usually grab is to use duplex pump, walk sideslip often has trouble for a pump, the simplest judgement method is: Give two maximum pressure of hydraulic pump vitta exchange, if become slow fast so, slow quickly so, the proof has a pump to have trouble. Eliminate a method: Debus hydraulic pump, change attaint, debug to experimental stage again can.
2, trot along on horseback all right amount to oil of relief valve leakage
Oil of relief valve leakage will cause the pressure inside the system too low, make the rotate speed of travel motor insufficient, go out to walk now thereby sideslip. Eliminating a method is: The travel that changes to already damaged trots along on horseback amount to relief valve; Motor and safe trade can walk the left and right sides when judgement, when looking to walk reversely whether deflexion.
3, mining machine to a side sideslip
If walk advocate the bedspring molten inside a powerful person or break off, or core of a powerful person is stayed in by card, cause oil pressure likely to reduce, occurrence travel walk along sideslip. Should measure when the examination walk advocate the pressure of oil path of a powerful person, normal value is 32.5Mpa. If walk advocate attaint of a powerful person, be about to change or be repaired.
Part 5
Grab oil is lukewarm exorbitant
Oil is lukewarm exorbitant, it is the common breakdown of system of grab hydraulic pressure, its matter is complex, often more unmanageable.
Of 1. radiator medicinal powder thermal efficiency is low.
Will be in charge of a type radiator to change radiator of board wing type, medicinal powder hot area can increase 8cm, its radiator is entered, the difference in temperature of exit can increase 10 ° C by 7 ° C, the effect is very apparent.
2. heat answers the malfunction of one-way a powerful person on oil path.
Radiator obstruction is more than protective pressure, the heat that makes answer oil path is oily not classics radiator is direct oil sump tank; Systematic cleanness spends difference, one-way valve is gotten stuck by contamination, core of a powerful person is in the position that often opens, radiator is not effective; The open pressure of one-way a powerful person cannot get assuring.
The air channel arrangement of 3. engine is unreasonable.
The unreasonable place of existing air channel is:
① radiator enters wind force insufficient. Kong Laizeng of a few long chamfer can leave to be added into wind force on side door.
Between ② radiator and engine all around put have space, did not undertake effective sealed, and deserve to weigh piece concave side is before and make sirocco forms eddy current, cause medicinal powder hot effect is poor. But stickup between radiator and engine sponge undertakes sealed, will deserve to weigh piece in front by plane of concave side instead.
Of system of ③ hydraulic pressure advocate pump place lacks thermal insulation board, the sidewall after causing what be blown to hydraulic pressure gasoline tank directly from the sirocco that engine comes to, cause the oil inside gasoline tank temperature rise is fast. Can be improved through increasing thermal insulation board.
The wing of radiator air channel of system of 4. hydraulic pressure piece lodging or oil duct jam, cause wind block to increase, medicinal powder hot effect is poor.
The wing that should adjust lodging in time piece, clear air channel jams content, the water that must use constant pressure regularly undertakes rinsing, in order to make sure air channel is expedite.
Oily brand of 5. hydraulic pressure chooses undeserved or oleaginous difference.
Hydraulic pressure oily viscosity is too low, can increase inside leak, reduce efficiency and produce quantity of heat; Viscosity is exorbitant, fluid pressure loss is increased, can produce much quantity of heat, cause oil lukewarm exorbitant. In the meantime, oleaginous poor easy emulsification, but the attaint of component of aggravate hydraulic pressure.
Pass the analysis of above, we can see the grab trouble of 80% is by maintain not seasonable or the operation is undeserved cause, when there is a symptom under grab, should notice.
Engine
① grab is faint, have abnormal knocking.
Smoke of ② Mao La, risk black smoke.
③ tobacco tar is used up exorbitant.
④ appears often hot alarm.
Electric wiring harness
① reacts not free, the operation is out of order from time to tome.
Breakdown of ② indicator light.
Frequency of ③ wrong alarm shows.
Chassis
① walks logy, turn to inconvenience.
② pedrail board craze.
Clay of ③ batholith accumulation, clastic rock.
Air conditioning system
① air conditioning makes cold not do one's best.
② gives wind companion to have peculiar smell.
When ③ works have abnormal knocking.
Hydraulic pressure system
High temperature of oily market of ① hydraulic pressure.
② appears frowsty car phenomenon, walk sideslip.
③ front equipment drops an arm.
④ cold machine is normal, heat engine start is slow.
Do good grab maintain the job while, still need to raise the technical level that operates a hand, reduce the happening of breakdown, ensure the success of project. Above content hopes to be able to help great master, if become aware useful and OK collect.
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