Method For Stopping Engine - Komatsu H75051 Operation & Maintenance Manual

OPERATION
A time lag might result until the machine stops after the turning operation if you turn the steering
wheel and stop turning it at certain position while the oil temperature is low.
In such case, use the frame lock bar to secure safety, and perform the warm-up operation in a large
place.
At that time, be sure not to continuously relieve the oil pressure in the circuit for more than 5 sec-
onds.
NOTICE
Turn the steering wheel a little and stop at certain position. Check that the machine has turned by
the angle corresponding to the turning angle of the steering wheel.
5.
After the warm-up operation, check that the instruments
and pilot lamps are normal.
If any problem is found, perform maintenance or repair.
Run the engine with a light load until the pointers of engine
coolant temperature gauge (3) and HST oil temperature
gauge (4) indicate the green range.
6.
Check for abnormal exhaust gas color, noise, or vibration.
If any abnormality is found, contact your Komatsu distribu-
tor.
REMARK
The cooling fan speed varies according to the following
conditions, but it is not abnormal.
The cooling fan speed increases when the hydraulic oil
temperature or engine coolant temperature is high.
The cooling fan rotates at a fixed speed in proportion to
the engine speed, regardless of any oil or coolant temper-
ature while it is rotating in reverse.

METHOD FOR STOPPING ENGINE

Keep away from the exhaust pipe immediately after stopping the engine.
NOTICE
If the engine is abruptly stopped before it has cooled
down, service life of the engine parts may be reduced. Do
not stop the engine abruptly except the case in an emer-
gency.
If the engine is overheated, do not try to stop it abruptly
but run it at medium speed to allow it to cool down gradu-
ally, and then stop it.
If the engine is stopped during the aftertreatment devices
regeneration, the components may be damaged.
When stopping the engine, stop the aftertreatment devices
regeneration first, and run the engine at low idle for ap-
proximately 5 minutes. Then stop the engine.
Stop the engine according to the following procedure.
1.
Run the engine at low idle for approximately 5 minutes to cool down the engine gradually.
MACHINE OPERATIONS AND CONTROLS
k k
WARNING
k k
WARNING
3-181