Komatsu D31EX-21, Operation & Maintenance Manual, Page: 122 / 256

OPERATION
OPERATION
3-70
DOES THE HORN SOUND NORMALLY?
Check that the horn sounds. If it does not sound at all or the sound is extremely feeble, a defect or broken wire is
suspected, ask your Komatsu distributor for possible repairs.
1. Turn the starting switch to the ON position.
2. Push the horn switch and check that the horn sounds.
CHECK OF OPERATION OF BACKUP ALARM
Check that the backup alarm sounds normally. If it does not, a defect or broken wire is suspected, ask your
Komatsu distributor for possible repairs.
1. Turn the starting switch to the ON position.
2. Check that parking lever is in the LOCK position.
Free
Lock