Operational Faults - Engine Receives No Fuel to Start .
In
marine diesel engine which are mainly started by air ,the highly
compressed air is used to start the engine when the engine picks up the
speed the starting air is closed and fuel is injected then the engine
start running in fuel this is the normal procedure .The engine which
gets the starting air and when the engine picks up speed the fuel does
not inject and so the engine does not fire .
So let us see what are the cases the engine receives no fuel :
So let us see what are the cases the engine receives no fuel :
Trouble shoot :Engine Turns on air but receives no fuel to start
1.Lube
Oil or Jacket cooling water pressure is too low, but the control air is
given to the starting valve but the hydraulic interlock closes the fuel
supply .
3.Regulating linkage is jammed or blocked .
4.Return Springs are loose or defective regulating linkage does not move to a position releasing a fuel charge .
5.Governor is
defective ,It does not release a fuel charge .The amount of fuel supply
is decided by variable speed governor so the governor should be dis
engaged if it is defective .
6.Starting lever blocking device is jammed and does not release control oil supply to the cut out servomotor.
7.The cut out servomotor ,or its control valve is jammed in cut out position.
8.The running direction interlock is uncoupled .
9.The rotary slide valve of running direction safety interlock is seized in at end position .
10.The automatic cut out device is defective .
11.The three way cock of the automatic cut out device are closed .
12.Control
oil pipes are incorrectly connected.Normally after the overhaul of the
main engine the control oil pipe wrongly connected .
13.Control oil pipes are obstructed or defective due to leaking .
14.The
load indicator does not indicate a charge .The engine works normally
and the fuel is injected correctly but the load indicator fitted may be
defective shows the wrong reading .
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