4D95 Used Fuel Injection Pump For Excavator PC60- 7 6204-73-1340 101495-3414
|Car name: Fuel Injection Pump||Model Number: 4D95|
|Quality: High quality||Engine type: Diesel|
|Application: Excavator||Part code: 101495 - 3414|
|Cooling: Water cooling||Injection: Direct|
Adjustment of Fuel Pump Timing
The timing can be altered by shifting the camshaft to the position relative to the crankshaft
For adjustable cam type engines timing can be altered by individual cams of the fuel pumps.
Individual unit timing checking up & adjustment required for movable cam type engine
For solid camshaft type, it is only required for checking on No. 1 unit.
How will you check pump timing if no TDC mark given on flywheel ?
In Main Engine
Make a marking between cross head and guide shoe while they are before TDC and also mark at the flywheel.
Turn the crank shaft in the same direction until the crosshead and guide shoe are at the previous mark (coincide)
Make the second marking on the fly wheel. We got two marks on the flywheel mid point between the two points is TDC.
Now 360º can be divided around the flywheel.
In Auxiliary Engine
Remove the fuel valve
Insert the rod onto the piston (mark on rod and flywheel)
Turn crank until the rod previous mark
Make the second marking on the fly wheel
Mid point between the two points is TDC
What points do you check on fuel pump when overhaul or how will you decide ?
Check plunger guide wear & tear
Check spring (length & stiffness, crack)
Plunger & barrel wear & tear, check clearance (5 microns for DO, 15 microns for HO) by dropping the plunger into the barrel it fall down slowly is OK
Check control sleeve and rack teeth for crack
Check the Delivery valve face
Check ‘O’ ring of fitted.
Metering of Fuel
Controlling the fuel amount in two ways, by means of a helix groove on the plunger or by means of control valves.
The quantity of fuel delivered is regulated by the vertical length of the helix where it is in line with the suction port.
This setting may be altered by rotating the plunger. In stop position, the vertical slot of the plunger is in lined with the spill port where then ports are opened and thus no injection occurred.
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