Hitachi ZX 38U-5A Technical Manual page 20

Avoid Injury From Rollaway Accidents
 Death or serious injury may result if you attempt to mount
or try to bodily stop a moving machine.
 Park the machine in compliance with the safe parking
procedures described in operator's manual to prevent the
machine from running away.
 Block both tracks and lower the bucket to the ground,
thrust the bucket teeth into the ground if you must park
on a grade.
 Park at a reasonable distance from other machines.
SAFETY
SA-14
SA-1297