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DO NOT suspend the compactor in the air
during the warm-up procedure.
The compactor must be placed flat on the
ground with a very slight down pressure to
keep it in place. When ambient temperatures
are
below
freezing,
compactor in the air without first warming it
up may cause the shock mounts to crack.
Failure to follow these procedures will void
compactor shock mount warranty.
GENERAL INSTRUCTIONS
The compactor is a device that uses available force to the
best advantage. The DYNAMIC FORCE of the mass weight
assembly, turning at a high rpm, produces a vibratory
force, and with controlled placement, an impact force. The
DOWN PRESSURE of the carrier on the compactor gives
a high static pressure which assists in the compaction
or driving. The vibration frequency is controlled by the
hydraulic flow input to the compactor and is optimized for
use in granular soils. The rate and density of compaction
depends on such factors as moisture content of the soil,
condition of the compactor and carrier, and the skill of the
operator.
Efficient compactor performance is directly related to the
flow rate specified. A higher flow rate does not improve
performance. It results in fluid overheating, and contributes
to early bearing failure. A lower flow rate causes reduced
compaction performance.
General Compaction
The following instructions are very important to the proper
performance of the compactor and the attainment of the
specified compaction density.
With a standard baseplate, the compactor is held with
full down pressure for no more than 5-10 seconds. The
application pattern should always begin next to a bank or
OPERATION
suspending
the
footing and at the previously compacted area. When the
maximum attainable density for that particular soil condition
is reached, a slight increase in vibration will be felt by the
operator. This increase in vibration is in no way harmful
to the tractor, and indicates that the soil will not compress
any further. In fact, additional time in that location may
actually loosen the soil previously compacted.
Work as much area as possible from one position and
overlap each compacted section slightly. The vibration
frequency has been chosen to give maximum efficiency in
granular soils using lifts of 2 to 4 feet. The closer the width
of the trench is to the width of the compactor, the higher
the delivered compactive effort.
It is necessary to turn the compactor OFF when being
transported or sitting idle. Should the running compactor
be placed on a hard surface without down pressure, the
unit and the carrier will vibrate excessively. Down pressure
transmits the vibration to the soil; neutral pressure will
rattle the whole carrier assembly.
Slope technique
This method of compaction is of primary interest to a
pipeline contractor seeking high production and efficient
equipment utilization. The fill material is placed at one end
of the trench and allowed to seek its own angle of repose.
Compaction is begun on this angle above, but still near,
the top of the pipe. All fill material is backfilled to this angle
and the compactor is worked up and down the slope.
Backfilling, compaction, and resurfacing can be done very
shortly after the pipe is in place.
Soil testing
Compaction density specifications are based on soil
samples of a set moisture content and soil composition.
Changing weather conditions, for example, can alter the
moisture content of the fill being used, and may make
meeting the specifications impossible. It is imperative that
frequent and reliable tests be conducted during application
of the compactor to determine the maximum lift that
can be used and still provide the required density. It is
important that lifts in excess of the established test results
NOT be used if the required density is to be achieved and
maintained.
Driving
Many driving jobs can be done with the compactor. Timber
sheeting, steel and aluminum sheeting, H and I-beams,
soldier piles and guard rail posts. The compactor will drive
HSX User Manual ◄ 9
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