Komatsu PC200-8M0 Shop Manual page 462

SEN06128-00
Diagnostic Tests (Cylinder Cut-out)
The operator can perform "Cylinder Cut-out mode"
operation with the machine monitor.
Cylinder Cut-out mode operation means to run the
engine with 1 or more fuel injectors disabled electri-
cally to reduce the number of effective cylinders.
This operation is used to identify a cylinder that
does not output power normally (combustion in it is
abnormal).
1. Selecting the menu
Select "Testing" on the "Service Menu" screen.
2. Selecting sub menu
After the "Testing" screen is displayed, select
"Cylinder Cut-out" by using the function
switches or numeral input switches.
a Select this sub menu as in the case of
selecting a menu on the "Service Menu"
screen.
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30-102
102 Testing and adjusting, Part 2
Special functions of machine monitor
3. Selecting cylinder to be cut out
After the "Cylinder Cut-out" screen is dis-
played, select a cylinder to be Cut out by using
the function switches.
q [F1]: Moves to left item
q [F2]: Moves to right item
[F4]: Selects hold or release
q
(If hold is selected, a diagonal line is dis-
played on the HOLD portion)
q [F5]: Returns to the testing screen
[F6]: Validates the selection
q
a This operation may be performed while
the engine is running.
a When [F6] is pressed, if background (a) of
the selected cylinder No. becomes white,
the cylinder is cut out.
a If the machine monitor cuts out a cylinder
but the engine controller cannot cut out
that cylinder, the background (a) of the
cylinder No. becomes yellow.
a One or more cylinders can be cut-out.
a During the Cylinder Cut-out operation, the
a u t o - d e c e l e r a t i o n f u n c t i o n c a n b e
enabled. If the auto-deceleration is set to
ON, auto-deceleration monitor (b) is dis-
played.
4. Resetting cutout cylinder
When changing a cylinder to be cut out or
when Cylinder Cut-out operation is finished,
select a cut-out cylinder to be reset with the
function switches.
a This operation may be performed while
the engine is running.
a When [F6] is pressed, if background (a) of
the selected cylinder No. becomes blue,
the cylinder is reset.
a If the machine monitor resets a Cut-out
cylinder but the engine controller cannot
reset that Cut-out cylinder, the back-
ground (a) of the cylinder No. becomes
red.
PC200, 200LC, 220, 220LC-8M0