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INTRODUCTION
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MACHINERY OVERVIEW
This machine, weighing more than 200kg to more than 400kg, is a compactor with back and forth motion. The strong vibra-
tion from the two-axes pendulum structure inside the vibrator changes the machine’s motion into straight back and forth
motion. The machine compacts through this motion.
The machine has tightening and compacting effect for all ground types other than the soft soil with high water percentage.
Because the machine is capable of straight back and forth movement, it works very effectively in grooved structures. Also,
since the work efficiency of this machine is high, it is suitable for compacting of a large area. The machine also works well
for flattening and leveling rough ground surface with irregularities created by the use of a powerful tamping rammer.
The machine can be used widely for heavy compacting works such as base work as well as finishing work for asphalt paving.
Do not use this machine on ground with a high water percentage and, in particular, do not use on clay because the machine
will not advance. Use this machine for compacting earth and sand mixtures, soil, sand or gravel. Do not use this machine for
other type of work.
The upper part of the machine consists of an engine, handle, belt cover and exterior frame. The upper part of the machine
is fixed to the vibrating plate of the lower part via an anti-vibration rubber. The lower part of this machine consists of a vibrat-
ing plate that incorporates a vibrator, there are two pendulums. The phase of those pendulums is changed by hydraulic
pressure.
The hydraulic cylinder for the vibrator is connected with a hydraulic hose to the hydraulic pump, which is directly connected
to the drive lever.
Power is provided by an air-cooled single-cylinder 4-cycle gasoline engine or diesel engine. The engine output shaft is
equipped with a centrifugal clutch. The centrifugal clutch is engaged when the engine speed increases. V-pulley is incorpo-
rated to the centrifugal clutch drum, and power is transmitted via the V-belt to the V-pulley on the vibrator side.
Through this process, the engine revolution is changed to the pendulum revolution suitable for compacting.
The vibrator pulley rotates the pendulum axis of the drive side. The two pendulums inside the vibrator are fixed to the two
pendulum axes that are positioned in parallel and are connected with the gear. The two axes rotate in opposite directions at
the same speed to generate vibration.
There is a spiral groove on the inner periphery of the gear assembled on the pendulum axis to be driven. This groove serves
as a key groove to let the guide pin slide to the axis direction. This guide pin is connecting the two pendulum axes. The phase
of the two pendulums is changed by the axial sliding of the guide pin. The change in phase causes the vibration to change
directions, thus changing the speed and travel direction of the machine.
Hydraulic pressure is used for the axial movement of the guide pin. At the end of the groove where the guide pin is attached,
a piston is installed. When the oil level rises inside the hydraulic cylinder on the vibrator side and the pressure increases, the
piston is pushed. Then the axis connected to the piston is pushed, which causes the guide pin attached to the axis to move,
resulting in a change in phase.
The operator of the machine, by using the back and forth motion lever of the handle, can adjust the oil quantity and pressure
by the connected hand pump to get the travel speed suitable for the work.
This operation manual describes the proper operation, basic inspection and maintenance procedures of the reversible
compactor. Please read this operation manual before use in order to maximize the excellent performance of this
machine and make your work more efficient and effective.
After reading the manual, please keep it in a handy location for easy reference.
For the handling the engine, please refer to the separate engine operation manual.
For inquiries about repair parts, parts lists, service manuals, and repairs, please contact the store where you purchased
the product, our sales office, or the Mikasa Parts Service Center. For parts lists, please visit our homepage at:
http://www.mikasas.com/
where you can access Mikasa WEB parts lists.
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Application
Warning About Incorrect Applications And Techniques
Structure
Power Transmission
The illustrations in this manual might slightly differ in part from the machine you actually
purchased due to design changes.
