Troubleshooting Of Diesel Engine.

Below are the some faults which may occur in any diesel engine.The rectification are also given below suggested go through it for better performance of engine.

01) Engine Will Not Start:-

A) Fuel-have at least six inches high in the tank and insure that the air breather is open to avoid air-lock.

B) Engine too cool.Try to warm the engine or wait for improvement in weather conditions.

C) Dirty fuel oil filters.Clean the fuel filter or replace it if necessary.

D) Cranking is too slow,run down battery.Re-charge the battery,tighten loose connections,check key switch and solenoid relay.

E) Minimum speed adjusting screw on engine Governor may be screwed out too far.Set it as per requirement.

02) Engine Starts But Stalls As Receiver Pressure Builds Up:-

A) Severe cold weather may make it necessary to open the service valve.

03) Engine Starts And Receiver Pressure Builds But Machine Will Not Slow Down Or Unload:-

A) Check the drain cock on the control unit is closed.

B)Throttle controller pipe leaking or clogged.Clean if clogged and replace/repair if leaking.

04) Engine Function Properly But compressor Does Not Load Up Or Only Partially Loads Up:-

A) Butterfly Valve Not Open.Take necessary action for free movement of butterfly valve.

B) Air cleaner elements are clogged or dirty.Clean thoroughly or replace.

05) Diesel Engine Shut Down Due To Insufficient Cooling:-

A) Low water level in indicator.Improve the water level by adding water.

B) Radiator clogged.Clean it immediately.

C) Dirt in fins.Blow out air in reverse direction to flow of air.

D) Faulty engine thermostat.Remove the fault as per instructions of manufacturer.

E) Operating pressure is above maximum allowable.Discharge the pressure and keep it in limit.

F) Engine fan belt too loose.Adjust the tension of belts as per requirement.

06) Diesel Engine Shut Down Due To Low Engine Oil Pressure Or No Oil Pressure Shown On Gauge:-

A) Oil level in crankcase of engine is low.Top up as required.

B) Compressor level setting is wrong.Level the compressor.

C) If engine running but no oil pressure shown on gauge,stop engine and check oil pressure gauge on some known pressure.Check oil filter element for clogging.Replace if required.

D) Check engine oil pump and screen.Take rectification action as per requirement.

E) Incorrect engine oil,oil line or oil pump screen can clog if incorrect oil grade is used.Use proper lubrication oil as per instruction of engine manufacturer.

07) Discharge Air Contains Excessive Lubricating Oil:-

A) Oil line from separator to air-end blocked.Clean choke in return line.

B) If separated oil is returning to intake in the proper way,it is possible that oil separator fiber glass wool discs needs replacement.Check separator shell for leak and rectify,if required.

C) Oil level in air/oil receiver is too high.Correct the oil level as required,up to middle in visual indicator.

08) Engine Speed Low During Start Up:-

A) Battery improper.check electrolyte level and specific gravity and recharge.

B) Loose wiring connection.Inspect and tighten.

09) Compressor Rotates In Reverse Direction When Shutdown With Pressure In The Receiver:-

A) Discharge valve malfunctioning.remove discharge valve.Inspect and rectify.

B) Oil check valve malfunctioning.Dismantle the oil check valve and inspect and repair.

10) Safety Valve Blows:-

A) Controller not functioning.Check control filter,strainer.Clean and adjust rotation per minute.(RPM)

B) Unloader transformer adjusted at higher pressure,adjust to proper pressure setting.

C) Butterfly valve not closing properly.Inspect and take necessary action.

D) Safety valve defective.Inspect and adjust,if necessary replace.Safety valve is to be set at 10% higher pressure than the maximum unloading pressure.

Hope this will help to rectify problems of your diesel engine.

You may also interested in following..........
The Requirement Of Fuel Filter In Diesel Engine.
Important Components Of Fuel Injection System For Diesel Engine.
Various Parts And Its Function In Internal Combustion Engine.