Deutz diesel engine common failures and trouble shooting
1, Deutz diesel engine starting difficulties
(1) no oil in the fuel tank or fuel tank switch did not open;
(2) fuel line or the filter;
(3) there is air in the fuel system;
(4) for oil injection pump is not for oil or not;
(5) the oil injector is not spraying or poorly atomized;
(6) the temperature is too low, Deutz diesel engine cold;
(7) insufficient cylinder compression pressure;
(8) the Starter does not rotate or powerless;
(9) air filter or intake manifold road block.
2 insufficient, Deutz diesel engine power
(1) insufficient cylinder compression pressure;
(2) poor diesel quality or oil-containing water;
(3) air filter;
(4) muffler plug;
(5) have air in the fuel system lines, devices;
(6) the valve timing errors;
(7) the fuel supply advance angle not right;
(8) the injector fuel injection pressure is not enough atomization bad;
(9) the oil content in each cylinder is not uniform;
(10) the speed has not reached its rated speed;
3, low cylinder compression pressure
(1) valve clearance is too small or not;
(2) valve and valve seat carbon, wear and tear, seal the bad;
(3) piston ring wear, lack of elasticity;
(4) piston ring carbon bonded to die;
(5) the wear of cylinder and piston, clearance is too large;
(6) the cylinder head gasket is not strict;
(7) leakage of injector hole;
(8) the valve spring broken;
(9) valves and valve guide bite stuck;
4, cylinder bed why did I break?
Cylinder broke through the main reasons are:
(1) cylinder bed itself poor quality;
(2) the oil pressure is too high;
(3) does not meet the requirements of cylinder head bolts tightening torque;
(4) when you install a cylinder, cylinder head bolt tightening methods are not methods according to regulations;
(5) the under surface of cylinder by the use of a long time deformation; ()
(6) another plane and the cylinder head on the under surface of the body with Burr, convex and concave grooves will also have a red cylinder bed;
(7) after the cylinder liners pressed into the body, their plane oversize shoulder high out of the body, in the same body height difference on the variance.
5, why would valve leak?
After valve leak, I there my there sound will take place within the cylinder, leading to power down. Causes of:
(1) valve and valve seat sealing surface abrasion, burn or Pocket;
(2) improper valve clearance adjustment;
(3) the nozzle atomization is not good or low pressure valve and valve seat sealing area too much carbon off strictly;
(4) the bending deformation of valve stem or valve stem and catheter serve too tight, run up and down with resistance,
(5) the elastic valve spring broken or weakened, and valves close tightly.
6, why was the piston hit valves?
Piston hit valves engine of heavy impact sound can occur, if not promptly excluded, bad Pistons, big accident occurred. The main reason for this failure is:
(1) depression depth does not meet the technical requirements of the valve;
(2) main bearing nut is loose;
(3) the connecting rod alloy burn or have fallen off;
(4) plate camshaft gear bolt, camshaft gear Hunt, causing loss of valve timing adjustment;
(5) piston and connecting rod bushing Shaw criminals who wear, clearance is too large,
(6) the improper valve clearance;
(7) the timing gear marks or not marked wrong Assembly, valve timing is incorrect;
(8) the valve spring broken;
(9) the sunken depth valve (valve big end plane below surface of cylinder size) variance.
7, why would valve breakage?
After the end of valve, head will fall into the cylinders causing the valve cylinder head and Pistons top-black, if not stop connecting rods, crankshaft deformation and caused serious damage.
Valve motion for more, other than issues of material and heat treatment of the valve itself, there are the following reasons:
(1) valve clearance not;
(2) the timing gear marks or not marked wrong Assembly, valve timing is incorrect;
(3) discharge temperature is too high;
(4) the valve spring broken;
(5) gas gutter do not fit well or less put an;
(6) the camshaft gear pressure plate bolt, causing the camshaft gear Hunt, valve timing offset;
(7) Deutz diesel engine speed is too high "speed", increases the impact load of valve, valve caused by broken;
(8) the valve gutter disassembly confusing, does not fit with each other, causing valve off.
8, cylinder head cracks why?
After cylinder head cracks, water will enter the cylinder, engine work, from exhaust pipe out. Have a cylinder head crack of main factor is generally caused due to both hot and cold. Reason:
(1) fuel delivery time wrong, bad nozzle atomization, combustion deterioration;
(2) cooling water does not freeze in winter cracks;
(3) water tank or water after water from the engine heat, and all of a sudden cold water stress cracking;
(4) each cylinder of high pressure oil pump oil quantity is uneven, some cylinders of fuel delivery is too large, and also have a cracked cylinder head.
(5) the cylinder bottom hole deviation when the casting of surface watercourses, watercourses Kong Qing NET, overly narrow watercourse, or corner of sand is not too small, due to poor cooling water circulation;
(6) by matching product modifications are not reasonable, resulting in high temperature can have a cracked cylinder head.
9, why the end of cylinder liner?
(1) inherent quality of cylinder liner does not comply with the technical requirements, such as the low hardness, high sulphur;
(2) cylinder head bolt tightening torque does not meet requirements of or below the cylinder block when the cylinder end Assembly rabbet plane, so when the piston up and down the cylinder are floating, cylinder liner broken;
(3) when installing the cylinder, the cylinder body with carbon, iron and other debris;
(4) the cylinder hole using a long time deformation, different;
(5) install cylinder cylinder screw holes around the edge crack, so that the engine at high temperature due to thermal expansion is not in the cylinder head is extrusion and rupture;
(6) when assembling liner paint will make the cylinder rupture;
(7) on the shoulder of cylinder liner on a plane above the body flat is too big;
(8) the shoulder of cylinder liner of notch should be rounded, when processing without rounded corners or rounded corners are too small, easily from desktop for cylinder sleeve and shoulder the stress concentration induced by rupture;
(9) use inferior cylinder-bed, will cause a cylinder fracture;
(10) the cylinder sets of levels of processing without the body, are not chamfered.
10, Deutz diesel engine why do black smoke?
After long, Deutz diesel engine smoke behavior can occur, affecting the work environment, air pollution, and the skill has decreased markedly. Its main causes are:
(1) the engine work for a long time;
(2) to injector insufficient or poorly atomized produce incomplete combustion;
(3) fuel supply point late, exhaust pipe of combustion;
(4) high pressure oil pump for oil amount too big or the cylinder oil evenly;
(5) air filter and intake inlet obstruction does not clear;
(6) heavy diesel oil or diesel oil quality is poor;
(7) leakage of valve key wind is not strict;
(8) on the camshaft cam worn too large;
(9) the fuel pump failure in advance;
(10) the exhaust manifolds or mufflers plug is not clear, at the same time with the exception of the engine noise.
Why take Blue 11, Deutz diesel engine smoke?
Take the blue smoke is primarily caused by burning oil. Reasons:
(1) serious wear of cylinder liner and piston, clearance is too large, engine oil into the cylinder combustion;
(2) improper Assembly counterpart of piston ring;
(3) serious valve stem and valve guide wear;
(4) the piston ring and oil ring is damaged or carbon more stuck, losing oil scraper features;
(5) oil, such as adding too much.
12, Deutz diesel engine why is there oil in the tank?
Oil in the tank caused the main factors are:
(1) cylinder Deutz diesel engine oil, aluminum close in the front cover, aluminum Assembly noncompliance or leaking load of boring, moisturizing oil into waterways;
(2) the body communicates with Chlamydia trachomatis and waterways of upper oil cylinder, cylinder head, oil hole copper tube is loose on the body are not riveting die;
(3) gas cylinder head, oil and water wall is Chlamydia trachomatis, shrinkage or cracking;
(4) oil cooler cover core crack of Chlamydia trachomatis, oil cooler, oil cooler Assembly "O"-ring Assembly is not good, "O" out of aging elastic rubber ring, oil cooler core "O"-ring groove processing caused by too much variance "O" ring seal pressure is not enough.
13, why there is water in the oil pan?
After entering the cooling water in the oil pan oil deterioration, resulting in oil pan of water in the main reasons:
(1) ageing resistance hydrosphere burn or rupture of cylinder casing;
(2) sand hole leaking cylinder head cracks;
(3) wet sand cracks or holes of cylinder liner shrinkage
(4) wet cylinder liner broken ends;
(5) within the body cavity or sand hole shrinkage cracks and other defects;
(6) the oil cooler has a quality problem, Deutz diesel engine is not working, the water flow into the oil pan.
14, why was the Bush burn?
Bearing crankshaft damage after the burn, the connecting rod deformation, if not stopped in time, serious cause connecting rod screw off, breaking the body. Bush burning reasons of:
(1) in the oil pan engine oil low oil or engine oil oil not flow freely, resulting in poor lubrication;
(2) low oil pressure;
(3) use oil too dirty in the process, oil in the water, diesel, ageing of the oil, oil model no;
(4) external engine oil seal pipe joints and their Deutz diesel engine configuration leakage with oil-lubricated parts;
(5) oil filter plug, oil cooler jams;
(6) sets of engine oil filter welding loose falls off;
(7) oil pipeline rupture, oil suction pipe lock nut is loose;
(8) oil pump rotor broken pump shaft fracture, and will cause burned to death;
(9) the bearing and axle Assembly clearance is too large or too small, so cannot be certain when oil lubrication oil film;
(10) the Ellipticity of the journal more than a certain amount of requests, also prevented the oil from forming oil film;
(11) bearing alloy cast loose and tiles, in the fast-moving off;
(12) main bearings connecting rod screw tightening torque nuts and fails to meet the requirements of the moment;
(13) clean when the body Assembly and crankshaft degrees do not meet the technical requirements;
(14) the crankshaft oblique oil hole drilled holes and body oils road;
(15) Deutz diesel Starter is insufficient lubrication, the track according to Moskowitz high-speed operation of diesel engines;
(16) piston cooling nozzle breaks or falls off.
15 why, Deutz diesel engine speed is not high, the car runs no faster?
(1) fuel pump throttle lever to achieve the maximum maximum fuel delivery, Deutz diesel engine idling is lower than the highest calibration value, adjustable rates low;
(2) fuel line there is air in the system;
(3) fuel tanks or diesel filter, small transmission oil pump filter blocked, for lack of oil;
(4) air filter, air intake inadequate;
(5) nozzle carbon more killed;
(6) the high pressure oil pump plunger early wear.
16, Deutz diesel engine oil consumption of oil why would increase?
(1) piston ring piston stuck in the Groove, sintering, and oil rings carbon deposition oil return holes were blocked;
(2) lack of elasticity for piston ring;
(3) piston ring, piston and cylinder sets of badly worn or there is a cylinder, engine oil into the combustion chamber;
(4) improper Assembly of piston ring, have a counterpart, second ring mounted reverse; oil ring wrong place;
(5) the oil increases too much, too much oil splash, partial entering the combustion chamber and burned;
(6) the damaged Cork oil pan gasket or oil leakage of oil drain screw, causing increased oil consumption;
(7) the Out-of-round bottom hole for cylinder liner;
(8) set into the body's loss of cylinder liner in the hole at the end of the cylinder;
(9) the valve oil seal failure;
(10) Out-of-round cylinder head valve guide hole;
(11) the cylinder and piston clearance is too large;
(12) the clearance between the valve stem and valve Guide, lubricating oil into the combustion chamber of the valve train;
(13) the transition of valve train lubrication, oil from the gap between the valve stem and valve guide into the combustion chamber.
17, Deutz diesel engines in use why is the crankshaft fracture in the process?
Crankshaft in the course of normal use, normally does not have a broken shaft, crankshaft has pledged to have enough strength in the design, and to go through rigorous testing and balancing check measurements. Causes of crankshaft has:
(1) under the crankshaft with sand hole, loose;
(2) physical properties and chemical properties of the material of crankshaft, metallographic organization does not meet the requirements;
(3) the engine work for a long time, due to fatigue the transition the crankshaft;
(4) main lock bearing nut is loose or not locked;
(5) oil too dirty, poor lubrication conditions, causing melt fracture of axle;
(6) the crankshaft grinding and distribution increase WHr, because journal r corner destroyed, ground at right angles, subjected to strength reduction caused by fracture of crankshaft;
(7) main bearing cap due to fracture the material or process;
(8) Deutz diesel engine power output did not use the clutch unit, force perpendicular to the direction of the crankshaft centre-line crankshaft, rear of crankshaft fatigue fracture.
18, Deutz diesel engine water temperature too high
(1) water pump fan belt is too loose, reduced water pump;
(2) Deutz diesel engine work took too long;
(3) lack of cooling water;
(4) water pump pump water shortage, lack of circulating water;
(5) the water pump impeller is damaged, loose water pump impeller and pump shaft, water pump pulley barrel keys, water pump bearing seizure;
(6) cooling system blockage, due to poor cooling water flow;
(7) the thermostat failures;
(8) not insensitive or water temperature sensor failure;
(9) the poor lubrication, oil temperature;
(10) the fan mounted against;
(11) the gap between the heat sink of water tank is dirt clogging effect of ventilation;
(12) water tank heat sink size, and unreasonable;
(13) car or converted for agricultural machinery is not reasonable, Windward is the water tank is in the way too much;
(14) the tank without the fan cover;
(15) when used for fixed power Deutz diesel engine, due to poor ventilation environment temperature is too high, or should be matched with open type circulating cooling water is not used.
19, oil pressure is too low
(1) insufficient oil in oil pan;
(2) not insensitive or oil pressure alarm failure;
(3) the oil pressure gauge and oil pressure sensing Plug does not fit;
(4) oil oil plug;
(5) the oil pump suction strainer plug;
(6) the oil filter plug, safety valve failure;
(7) Deutz diesel engine main bearings connecting rod bearing wear, clearance increased;
(8) Deutz diesel engine is overheating, engine oil temperature, engine oil diluted;
(9) the gap between the oil pump gear and shell or excessive backlash;
(10) oil pump oil leakage of pump body is Chlamydia trachomatis, shrinkage;
(11) use of engine oil grade does not;
(12) 495-gasket is not installed or is damaged, oil leaking from the gap;
(13) oil spill in the fuel line nut loose;
(14) the oblique oil hole of crankshaft, cylinder block main bearing oil holes drilled or Chlamydia trachomatis;
(15) back to the valve opening pressure is too low on the oil filter, causing oil return oil prematurely, affecting the entire oil pressure lubrication system;
(16) oil filter