4D95-5 Used Fuel Injection Pump For Excavator PC130 - 8 4941173 6271 - 71 - 1110
|Car name: Fuel Injection Pump||Model Number: 4D95 - 5|
|Quality: High quality||Engine type: Diesel|
|Application: Excavator||Part code: 4941173|
|Cooling: Water cooling||Injection: Electric|
Adjustment Of Fuel Pump Timing
Fuel Injection Pumps – Marine Engineering
Function of fuel injection pumps
To supply accurate metered amount of fuel with sufficient pressure to open fuel injector in correct timing.
How to cut out fuel pump
Reduce the engine speed
By lifting the pump roller form cam peak and securing the pump roller guide
By making pump rack to zero position
How to notice the incorrect timing ?
Difficult to start the engine
Abnormal exhaust temperature reading
Black smoke coming out
Irregular running of engine.
How to check the fuel injection pump timing ?
Lock off the starring mechanism
Start L.O pump
Open all indicator cock
By hair line method
Turn the engine so that the unit to be checked is toward the TDC of compression stroke (plunger upstroke) so that hair line marking on plunger and pump body are coincided.
When hair lines are coincided, stop turning and check the mark on the fly wheel whether timing is correct or not.
By removing deflector from fuel pump
Take out deflector on both sides of the fuel pump
Put hand torch on one side of pump and mirror on the other side
The light from torch will be visible on the mirror
Turn the engine so that the unit to be check is toward the TDC of compression (at plunger upstroke)
At one instant the light on mirror disappears. (When plunger covers the deflector port)
At this time, stop engine turning & check the mark on flywheel.
Adjustment of Fuel Pump Timing
Slightly different variation can be adjusted:
By adding or reduction shims on the pump base, or
By turning the plunger up and down adjustment screw on the pump roller guide, or
By shifting the coupling flange between the pump and the drive side of the engine in case of combined unit system, (for small engine)