Komatsu HD465-8, Operation & Maintenance Manual

Page: 359 / 420

METHOD FOR CHECKING RETARDER BRAKE PERFORMANCE
k k
WARNING
If the machine moves when the braking capacity is being checked, it may lead to serious personal injury
or death.
If the machine moves, lower the engine speed immediately, return the gear shift lever to NEUTRAL posi-
tion (N), and depress the foot brake.
NOTICE
When checking, be sure to select “F2” in “F1 Start at D Position Setting”, and then set the gear shift
lever to position D. Neglecting this can damage the inside of the transmission.
1.
Check that “F2” is selected on “F 1 Start at D Position Set-
ting” of user menu of the machine monitor.
2.
Stop the machine on flat ground and pull the retarder con-
trol lever (1) fully.
3.
Set the gear shift lever (2) in position D and increase the
engine speed gradually.
If the machine does not move when the engine speed is
increased to 1400 rpm, it is normal.
If any problem is found, ask your Komatsu distributor for
repair.
4.
Decrease the engine speed and set the gear shift lever to
NEUTRAL position (N).
METHOD FOR CHECKING PARKING BRAKE PERFORMANCE
k k
WARNING
If the machine starts to move during the test, reduce the engine speed, set the gear shift lever to NEU-
TRAL (N) and engage the parking brake.
Consult your Komatsu distributor for inspection and repair. Make sure to repair the brake before opera-
tion.
NOTICE
When checking, be sure to select “F2” in “F1 Start at D Position Setting”, and then set the gear shift
lever to position D. Neglecting this can damage the inside of the transmission.
MAINTENANCE MAINTENANCE PROCEDURE
4-41