Kubota series 15 common fault cause analysis and resolution methods you must master?

Kubota series 15 common fault cause analysis and resolution methods you must master?

Winter is coming , Kubota series engine is not easy to start15kinds of reasons do you know ？

1 .No fuel

2 .Air in the fuel system

3 .Water in the fuel system

4.Fuel filter clogged

5 .High viscosity of fuel oil or engine oil at low temperature

6 .Fuel leakage due to loosening of fuel injection pipe locating nut

7 .Incorrect injection timing

8 .Fuel injector clogged

9.Failure of the jet pump

10 .Stuck crankshaft , camshaft , piston , cylinder or bearing

11 .Cylinder has a compression leak

12 .Incorrect valve timing

13 .Piston Rings and Cylinder Wear

14 .Too much valve clearance

15 .Failure of the solenoid valve

II. What are the reasons why the starter motor of the Kubota series engine does not work?

1. Battery discharge solution: charging

2. Starter motor failuresolution : repair or replacement

3. Key switch failuresolution : replacement

4. Solution for cabling disconnect: Link

III. What are the reasons for the unstable operation of Kubota series engines?

1 .Fuel filter clogged or dirtySolution : replace

2 .Air filter cloggedsolution : clean or replace

3 .Fuel leakage caused by loose fuel injection pipe positioning nutSolution : tighten the positioning nut

4 .Jet pump failuresolution : repair or replacement

5 .The opening pressure of the fuel injector is incorrect. Solution : Repair or replace

6 .The fuel injector is stuck or blocked. Solution : Repair or replace

7 .Failure of governorsolution : maintenance

8 .Turbocharger bearing wearsolution : replace the turbocharger assembly

9 .Turbine shaft bentSolution : Replace the turbine assembly

10 .Damage to turbine supercharger blades or other components due to foreign matter. Solution : Replace the turbine supercharger assembly .

IV. The Kubota series engines have white or blue exhaust fumes

1 .Excess OilSolution : Reduce to Specified Oil Level

2，Piston rings and cylinder wear or stucksolution: repair or replacement

3 .Injection timing is not correctSolution : Adjustment

V. Oil from Kubota series engines leak into the exhaust or aqueduct

1.Blockage or deformation of drain pipeSolution : Repair or replacement

2 .The piston ring seal of the turbocharger is bad. Solution : Replace the turbocharger assembly

VI. Kubota Series engines have black or dark grey exhaust fumes

1.OverloadSolution :Reduce Load

2 .Use of poor quality fuelSolution : Use the prescribed fuel

3 .Fuel filter cloggedsolution : replace

4 .Air filter cloggedsolution : clean or replace

5 .Insufficient fuel injectionsolution : Repair or replace the fuel injector

VII. The Kubota series engine does not produce enough power

1 .Injection timing is not correctSolution : Adjustment

2 .The engine 's moving parts seem to be stuck. Solution : Repair or replacement

3．Jet pump failuresolution: repair or replacement

4 .Insufficient fuel injectionsolution : Repair or replace the fuel injector

5 .Compressor LeakSolution : Check Compressor Pressure and Repair

6 .Exhaust system leaksolution : repair or replacement

7 .Exhaust leak on the compressorsolution : repair or replacement

8 .The air filter is dirty or clogged. Solution : Clean or replace

9 .The compressor impeller is rotating heavily. Solution : Replace the turbocharger assembly

VIII. Excessive consumption of lubricating oil for Kubota series engines

1 .The piston ring opening clearance is in the same direction. Solution : Change the opening clearance direction of the ring

2 .Oil ring wear or stucksolution : replace

3 .Wear of piston ring groovesolution : replace the piston

4 .Wear of valve stem and valve guidesolution : replacement

5 .Wear of Crankshaft Bearing and Connecting Rod BearingSolution : Replacement

6 .Oil leakage due to seal or gasket failureSolution : Replace

IX. Fuel is mixed in the lubricating oil of the Kubota series engine

1 .Wear of the plunger of the jet pumpSolution : Repair or replacement

2 .Insufficient fuel injectionsolution : Repair or replace the fuel injector

3 .Jet pump rupturesolution : replacement ,

X. How can water be mixed in the lubricating oil of Kubota series engines be fixed?

1 .Cylinder head gasket failuresolution : replacement

2.Cylinder Block or Cylinder Head CrackSolution : Replace

XI. What about low oil pressure on Kubota Series engines?

1 .Oil is insufficientsolution : supplement

2 .Oil filter cloggedsolution : clean

3 .The overflow valve is clogged. Solution : Clean

4 .The relief valve spring is loose or broken. Solution : Replace

5 .Crankshaft bearing oil gap is too largesolution : replace

6 .The connecting rod bearing oil clearance is too large. Solution : Replace

7 .The oil clearance of the rocker arm is too large. Solution : replace

8 .Oil duct blockagesolution : cleaning

9 .Different oil typesSolution : Use the correct type of oil

10 .Oil pump failuresolution : replacement

XII. How can I check for repairs if the oil pressure of the Kubota series engine is high?

1 .Different types of oilsolution : use the specified type of oil

2 .Overflow valve failuresolution : replacement

XIII. Causes and solutions for overheating of Kubota series engines:

1 .Oil is insufficientsolution : supplement

2 .The fan belt is broken or stretched. Solution : Replace or adjust

3 .Insufficient coolantsolution : add

4 .Dust clogged the heat sink and heat sinksolution : clean

5 .Corrosion inside the radiatorsolution : clean or replace

6 .Coolant channel corrosionsolution : clean or replace

7 .Radiator cover failuresolution : replacement

8 .Overload operationsolution : reduce load

9 .Cylinder Head Gasket FailureSolution : Replacement

10 .Incorrect injection timingSolution : Adjust

11 .Improper use of fuelSolution : Use approved fuel

XV. Solution for rapid discharge of Kubota series engine batteries:

1 .Insufficient battery electrolytesolution : replacement

2 .Fan belt slippingsolution : Adjust belt tension or replace belt

3 .Wiring disconnectedSolution : Connect

4 .Rectifier failuresolution : replacement

5 .Alternator failuresolution : replacement

6 .Battery failuresolution : replacement

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