Komatsu PC200-8M0, Shop Manual, Page: 360 / 1254

SEN06127-00
30-101
8
PC200, 200LC, 220, 220LC-8M0
101 Testing and adjusting, Part 1
Testing engine speed
Testing engine speed 1
a
Measure the engine speed with the monitoring
function of the machine monitor.
a
Measure the engine speed under the following
condition.
q
Engine coolant temperature: Within oper-
ating range
q
Hydraulic oil temperature: Within operat-
ing range
1. Preparation work
Operate the machine monitor so that the
engine speed can be monitored.
a
For the operating method of the machine
monitor, see Special functions of machine
monitor.
a
Monitoring code: 01002 Engine speed
2. Measuring low idle speed
1) Start the engine and set the fuel control
dial in the low idle (MIN) position.
2) Set all the levers and pedals for work
equipment control, swing control, and
travel in neutral and measure the engine
speed.
3. Measuring high idle speed
1) Start the engine and set the fuel control
dial in the high idle (MAX) position.
2) Set the working mode in the power mode
(P) and turn the auto-decelerator OFF.
3) Set all the levers and pedals for work
equipment control, swing control, and
travel in neutral and measure the engine
speed.
4. Measuring 2-pump relief speed
1) Start the engine and operate the arm cyl-
inder to the IN stroke end.
2) Set the fuel control dial in the high idle
(MAX) position and set the working mode
in the power mode (P).
3) Operate the left work equipment control
lever to relieve the arm circuit at the IN
stro ke e nd and m easu re the eng in e
speed.
5. Measuring 2-pump relief and power maxi-
mizing speed (near rated speed)
1) Start the engine and operate the arm cyl-
inder to the IN stroke end.
2) Set the fuel control dial in the high idle
(MAX) position and set the working mode
in the power mode (P).
3) While operating the left work equipment
control lever to relieve the arm circuit at
the IN stroke end and depressing the
power maximizing switch, measure the
engine speed.
a
The power maximizing function is reset
automatically in approximately 8.5 sec-
onds even if the switch is kept depressed.
Accordingly, measure the engine speed in
that period.
a
You may check with the swing lock switch
ON (In this case, you do not need to oper-
ate the power maximizing switch.)
6. Measuring auto-deceleration speed
1) Start the engine, set the fuel control dial in
the high idle position (MAX), and turn the
auto-decelerator ON.
2) Set all the levers and pedals for work
equipment control, swing control, and
travel in neutral and measure the engine
speed when the auto-decelerator oper-
ates.
a
The engine speed lowers to a certain level
approximately 5 seconds after all the
levers and pedals are set in neutral. This
level is the auto-deceleration speed.