
Allied Construction Products, LLC www.alliedcp.com
TM103349_SP1000B_15sep
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4.0 Product Information
4.1 Description and Application - Typical
The Allied Skid-Pac is a skid-steer-mounted,
hydraulic powered, vibrating plate compactor. It is
used for soil compaction. Applications include backfill
compaction, base course preparation, finish surface
treatment and embankment buildup.
Specifically designed for skid-steers, installation of
the Skid-Pac requires no additional mounting or
hydraulic kits. It’s attached to the skid-steer in the
same manner as mounting a bucket. Power to
operate the Skid-Pac is provided by the skid-steer’s
auxiliary hydraulic circuit.
Suitable Skid-steers must have adequate lift and
hydraulic capacities to properly and safely operate
the Skid-Pac. Refer to the Specifications Table for
operating specifications and carrier requirements.
Contact your dealer or Allied if you have any
questions regarding the installation of this equipment.
4.2 Familiarization of Main Components
Fig. 4-1 Main Components Identified
Dynamic Assembly
– Consists of the lower
assembly, eccentric mass, bearings and rubber
springs. The strength of vibration is affected by the
rotation speed of the motor, weight of the eccentric
mass and the off-center distance between eccentric
mass and shaft. The vibratory action and impulse
force is transferred through the attached compaction
plate.
Suspension System
– Rubber Springs mounted
between the Top Frame and Dynamic Assembly
isolate the vibratory energy from the carrier.
Top Frame
– The Top Frame serves as the
connection point used to attach the Skid-Pac to the
coupler of the skid steer.
Control Valve
– The Skid-Pac is standard equipped
with the multi-function control valve. Benefits include
optimized operation with improved reliability of critical
components such as the motor and bearings.
NOTE
:
The valve is factory pre-set and requires no
further adjustments.
The control valve performs the following functions:
Flow regulator
– Protects the bearings from
excessive loads by limiting oil flow that can over-
speed the hydraulic motor.
Pressure control
– Protects the hydraulic
components from over-pressure. This is factory
pre-set at the maximum operating pressure plus
200 psi (14 bar).
Anti-cavitation circuit
- Controls deceleration of
the hydraulic motor and eccentric mass. Also
provides protection against motor damage if
circuits not equipped with an open return.
Return line check valve
- Prevents reverse flow
to the hydraulic motor. Also provides a nominal
back-pressure to ensure the proper operation of
auxiliary valves, such as Allied’s AC40 and AC75
priority flow control valves.
4.3 Principle of Operation
The vibratory action and impulse force are generated
by the hydraulic motor turning the eccentric mass at a
high rate of speed. Efficient compaction of granular
type soils is further aided by the static pressure
exerted by the weight of the carrier pressing against
the rubber springs.
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