43
Backhoe operation
1)
Place the bucket teeth on ground while the angle
between bucket bottom and ground is 45
.
2)
Apply arm to be the main digging force, pull
bucket to the machine direction.
3)
When dirt adheres to the bucket, remove arm and
(or) bucket quickly to throw dirt.
4)
When dig straight trench, place crawler parallel to the trench. After digging to required
depth, remove machine to continue digging.
Leveling operation
Don’t push or pull earth with bucket when the
machine travels.
1)
Push dozer blade backward to fill and level
road.
2)
Apply boom, arm, and bucket generally. As
the figure shows, place bucket and arm on a line
basically. Operate arm in while lifting boom slowly.
Once arm passes the vertical position, lower boom
slowly and keep the movement of bucket plane.
Operating boom, arm, and bucket at the same time
Don
’
t apply bucket overmuch to
level road surface, otherwise
excavator will be damaged.
⚫
When lower boom, you should avoid stopping it suddenly. Otherwise the
impact load may damage excavator.
⚫
When operate arm, in order to prevent damaging hydraulic cylinder, you
should avoid lowering hydraulic cylinder to the bottom.
⚫
Prevent bucket from colliding with crawler.
⚫
When digging deep trench, you should prevent boom or arm cylinder hose
from impacting with ground.
FIG. 3-28
FIG. 3-29
FIG. 3-30
