OPERATING INSTRUCTIONS
AU103170 H5B 30
TRENCHER OPERATION
Selecting Correct Tools for the Job
You can increase the digging speed and still get long life
from you trencher if you use the correct trencher
components. Read the following section on how to select
the correct combination of parts for your machine.
Then, see your Astec dealer and ask for complete
information on trencher parts.
As a general rule, always select the shortest boom,
lightest chain and lightest teeth to get the job done.
Then, in hard digging conditions, select a high tensile
strength chain, a rock boom, and anti-backflex chain with
rock and frost teeth.
When you make the selection, know the trench width,
trench depth, soil and weather conditions of the job.
1. Select the boom length.
2. Select the boom type (sprocket or channel).
3. Select the chain type (tensile strength and standard
or anti-backflex).
4. Choose the teeth (cupped, rock and frost carbide
cutters, or both).
5. Choose the tooth width and arrangement.
6. Determine if you need dirt drags.
TRENCHER BOOM TYPES
Sprocket Boom (if equipped)
The sprocket boom is the most efficient boom for digging
in light to medium soil. Friction is reduced because the
chain is riding on sprockets and not rubbing on a boom
channel. More power is available for digging when friction
is reduced.
BD01F334
WARNING:
Operate controls only when in the
operator’s seat.
WARNING:
CLEAR THE WORK AREA OF ALL
BY-STANDERS. During digging maintain a
minimum safety zone of 50 ft. (15 M) around the
machine.
WARNING:
Make sure all people are clear of the
digging chain while the digging chain is rotating.
Serious injury or death can result from contact
with the digging chain.
WARNING:
Sharp moving parts - do not remove
restraint bar. Keep clear of hazardous area. KEEP
CLEAR. Serious injury or death can result from
bodily contact.
WARNING:
Know the location of underground
cables, water pipes, gas lines, etc. Injury or death
can result from cutting a cable or gas line.
WARNING:
Never allow anyone in the trench
while digging.
WARNING:
Be careful when working near the
side of a trench. Serious injury or death can result
if the walls of the trench fall.
WARNING:
Operate controls only when seated
in the operators seat.
WARNING:
CLEAR THE WORK AREA OF ALL
BYSTANDERS. DURING DIGGING KEEP
SPECTATORS AWAY. The digging chain of your
trencher can throw rock and soil debris a
considerable distance.
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