Komatsu PC130-7, Shop Manual

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PC130-7
20-113
TESTING AND ADJUSTING
2. Remove bolt (3) and fix drive gear (4) to holder
(5) with fixing bolt [2].
a
As fixing bolt [2], use a bolt 6 mm in thread
diameter and 35 mm in length.
a
Pass the fixing bolt through the screw hole of
bolt (3) and tighten it into the screw hole of
the drive gear, and the fuel injection pump is
fixed in the fuel injection timing.
3. Install the fuel injection pump, holder, and drive
gear together.
a
See DISASSEMBLY AND ASSEMBLY,
Removal, installation of fuel pump assembly.
a
After installing the fuel injection pump tempo-
rarily, check the fuel injection timing accord-
ing to the above described procedure.
4. After finishing adjustment, remove the measur-
ing tools and return the removed parts.
k
Be sure to remove pin [1] and fixing bolt [2].
3
Cylinder head cover mounting bolt:
7.84 – 9.8 Nm {0.8 – 1.0 kgm}
ADJUSTING BY DELIVERY VALVE METHOD
a
After repairing or replacing the fuel injection
pump or timing gear, adjust the injection timing
according to the following procedure.
ADJUSTING
a
Apply the delivery valve method to only adjust-
ment of the injection timing.
1. Open the engine hood and remove all cylinder
head covers (1).
2. Remove the engine undercover (on the radiator
side).
3. Rotate the crankshaft forward to bring the
stamped "1.4TOP" line (a) of the crank pulley to
pointer (2) and set the No. 1 cylinder to the com-
pression top dead center.
a
Crank the crankshaft with the crank pulley
mounting bolt.
a
There are 2 stamped "1.4TOP" lines on the
crank pulley. Use the one at the diagonal
position of "2.3TOP".
a
When the No. 1 cylinder is at the compres-
sion top dead center, the rocker arm of the
No. 1 cylinder can be moved by the valve
clearance with the hand. If the rocker arm
cannot be moved, the No. 1 cylinder is not at
the compression top dead center. In this
case, rotate the crankshaft one more turn.
TESTING AND ADJUSTING FOR FUEL INJECTION TIMING
(1)