Komatsu 4D95LE-2 - TESTING AND ADJUSTING FUEL INJECTION TIMING

TESTING AND ADJUSTING TESTING AND ADJUSTING FUEL INJECTION TIMING
TESTING AND ADJUSTING
FUEL INJECTION TIMING
Counter mark method
* Adjustment is normally carried out using this
method.
(In cases when the fuel injection pump has not
been repaired and is assembled again to the
same engine, or when only the fuel injection
timing is checked)
1. Set the No. 1 cylinder to the compression top
dead center.
1) Rotate the crankshaft in the normal direc-
tion and align pointer
(2) with (1.4 TOP line)
(1) on the crankshaft pulley.
2) Use the procedures below to check that the
No. 1 cylinder is at compression top dead
center.
If the condition is not as shown be-
low, rotate the crankshaft one more turn.
* When fuel injection pump has been re-
moved: Check that
it is possible to see
the
C at the tip of the idler gear teeth.
* When fuel injection pump is installed to
engine: Remove the head cover and
check that the intake and exhaust valves
of the
No. 1 cylinder are closed (there is
a clearance for both the No. 1 intake and
exhaust valves).
2. Remove cover (3) at the front of the fuel injec-
tion pump.
3. Install to the engine with the fuel injection pump
holder and drive gear as one unit.
4. Insert the timing check pin (diameter: 4 - 4.5
mm, length: 80 mm) through hole a in the front
gear cover and align with the hole in the drive
gear.
* The timing check pin must enter straight.
Check that the hole in the fuel injection pump
holder is aligned with the mounting hole in
the front gear cover (the mounting bolt goes
in).
* If the position is not aligned, remove the
fuel injection pump again and check the
meshing of the drive gear.
5. Remove the timing check pin and tighten all
bolts.
BWP04015
1 2-6
95-2 SERIES