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5.0 Ho-Pac Selection and Application
5.1 Match Compactor Type to Application
The Allied Ho-Pac is a vibratory plate compactor,
designed for mounting on mobile equipment with
hydraulic booms, such as rubber tired or track-type
construction vehicles. It is best suited for compacting
granular type soils by combining three actions:
x
Impulse Force
x
Vibration Frequency
x
Down Pressure (Static Weight)
5.1.2 Size the Ho-Pac to the Carrier
The task of choosing the right carrier with the right
capabilities (reach, lift and hydraulic capacity) is
important if you are to achieve optimum results.
Select the Ho-Pac size that will work best with the
size of the carrier. If too small for the carrier, the
compactor will be damaged by the carrier, while a
compactor too large will damage an undersized
carrier.
5.1.3 Other Carrier Criteria
x
Select a size with sufficient reach to compact the
deepest area of the trench or excavation.
x
Know how your machine is equipped and if any
modifications have been made. Factors such as
boom type, stick length, undercarriage, tracks,
counterweights, etc., all affect the lifting capacity
of the carrier. Also take into account any add-
ons, such as a quick attach coupler. Consult the
carrier manufacturer's manual for specifications.
x
Select a carrier equipped with a one-way
hydraulic circuit that's capable of proper flow and
pressure.
x
Select a carrier that will provide adequate down
pressure without loss of hydraulic power to the
Ho-Pac. If the carrier cannot maintain the power
required, the proper density will not be reached.
Undersized compactors (as well as underperforming
compactors) are less economical to use because
compaction is limited to smaller lifts and additional
passes. This generates other inefficiencies as longer
running cycles result in loss of time and increased
energy consumption and component wear.
Optimum efficiency is only obtained when proper
operating technique is employed. How many passes
it will take, along with the duration, will vary with
material type and lift. Additional fill material and
repositioning of the carrier may be required to
achieve a finished surface.
5.2 Carrier With Auxiliary Hydraulic Circuit
CAUTION
Hydraulic circuits differ between
machines. Improper oil flow or pressure
can damage the Ho-Pac or carrier. Only
qualified personnel, having knowledge
of the machine’s systems, proper test
equipment and tools should perform
conversion set-up and adjustments.
The Ho-Pac and other hydraulic work tools are not
self-powered. Performance hinges upon the ability of
the host machine's hydraulic circuit to meet critical
flow and pressure demands.
Generally, most machines will require some degree
of conversion to make use of their hydraulic power.
Conversions to machines equipped with a factory or
dealer installed auxiliary circuit, however, may require
little more than minor adjustments to flow and
pressure settings.
Carefully follow all instructions, including those
provided by the machine manufacturer, when making
adjustments.
5.2 Conversion Kit for Carrier without Hydraulic
Circuit
Fig 5-1 Allied Conversion Kit with AC-Series Valve
Allied conversion kits are available for almost any
carrier. For machines without an auxiliary hydraulic
circuit, the kit may include an "AC" series valve.
These solenoid-operated valves will control flow and
pressure to the work tool.
Requests for further information or assistance with
Ho-Pac selection or conversion kits should be
directed to your Allied dealer or by contacting Allied
Sales or Product Support Departments.