Volvo ECR50D, Руководство оператора, Страница: 108 / 213

Buckets
Working with buckets
Digging a trench
When excavating a trench it is recommended to dig
in layers, thus to obtain a level trench bottom. Use
a combination of bucket, dipper and boom motions
to maintain the angle of the bucket while digging.
1 Anchor the dozer blade into the ground behind
the machine.
2 Extend the excavating equipment and place the
bucket vertically with teeth on the ground.
3 Start digging by operating the bucket cylinder.
Simultaneously operate the bucket and the
dipper arm cylinders once half of the digging
cycle has been reached.
NOTE!
Do not dig the bucket too deep into the ground,
since this would block the digging action. However,
should this occur, slightly raise the boom. Work in
a smooth way and avoid quick movements.
Completely close the bucket when filled. Raise the
boom and simultaneously start the swing motion,
until the unloading position is reached.
Backfilling or grading
1 In order to backfill a trench, position the machine
perpendicularly to the trench and press the
dozer blade against the ground.
2 Once the machine starts to push correctly do not
leave the dozer blade control lever in maximum
position, but release it.
Do not use the bottom of the bucket to level the
ground by swinging it back and forth. This is the
purpose of the dozer blade.
Operating techniques
Buckets 107