Komatsu Galeo PC138US-8, Руководство по ремонту, Страница: 334 / 946

SEN02458-01 30 Testing and adjusting
6
PC138US, USLC-8
Testing engine speed 1
a
Test the engine speed with the monitoring
function of the machine monitor.
a
Test the engine speed under the following con-
dition.
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. Testing 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 test the engine
speed.
3. Testing 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 test the engine
speed.
4. Testing 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
stroke end and test the engine speed.
5. Testing 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 test the engine speed
when the auto-decelerator operates.
a
The engine speed lowers to a certain level
about 5 seconds after all the levers and
pedals are set in neutral. This level is the
auto-deceleration speed.