How much do you know about walk behind roller? In this paper, according to the different physical properties of each component of walk behind roller, a finite element simulation is used to build a mechanical constitutive model for the walk behind roller. When the walk behind roller contacts different aggregate particles, the variation rules of mechanical information are obtained and studied.

First, let’s have a look at the working principle of machine .Forward and reverse drive to the walk behind roller drum is by means of a hydrostatic transmission.A combined hydraulic pump and motor is belt driven at constant speed from a diesel engine and drives the drum through a duplex chain and reduction gear.

Rubber couplings at each end of the drum insulate the transmission and the operator from the effects of vibration.

An eccentric shaft mounted within the drum provides the vibration. It is driven by the engine at a constant speed via a propeller shaft with flexible couplings, a single dry plate clutch and a pre-tensioned vee belt.

The vibrator shaft rotates at a constant 3900 rpm to give a frequency of 65 cycles per second.

The walk behind roller drum is of heavy duty welded steel construction with seam welded plates to prevent the ingress of water.

The vibrator shaft bearings are grease packed and sealed on assembly requiring no periodic lubrication. An over-center type transmission parking brake is fitted for additional safety when the walk behind roller is not being used. A removable cast aluminum side shield protects and provides access to the drive chain, clutch and vibrator drive belt.

The second part is about the main features of the product.The rocking Direction/Speed lever acts as a deadmans safety device.

During normal operation it should only be moved slowly and progressively as explained above. In an emergency, the walk behind roller can be stopped instantly, irrespective of its direction of travel, by releasing the rocking lever which will return to its neutral position locking the transmission.

The walk behind roller has an infinitely variable travel speed of between 0-3 kph (0-1.8 m.p.h.) in either direction. This gives the operator freedom to select a travel speed best suited to the compaction or finish required. Additionally, when rolling in a confined space, the speed may be regulated to give the degree of control necessary for safety under these conditions.

The operation of both direction and travel speed is by a rocking lever. grip the right hand side of the lever and the walk behind roller will move in a forward direction. The speed of the walk behind roller is governed by the degree of movement of the lever toward the handlebar.

Reverse drive is engaged by similarly gripping the left hand side of the lever. An advantage of the rocking lever control is that the handlebar is firmly held in both hands, safety containing the torque reaction resulting from moving off or changing direction.

The last part is about the operation of the machine.

Vibrator Lever

The vibrator lever is of the spring loaded ‘over center’ type and controls the clutch which starts and stops the vibrator. Move the lever forward to start the vibrator and backward to stop it.

Vibration increases the compaction effort of the walk behind roller. A cold engine may have difficulty driving the vibrator at full speed. Always allow the engine to ‘warm up’ for two (2) to three (3) minutes before engaging the vibrator.

When initially compacting very loose or soft material e.g. fresh blacktop, the first passes of the walk behind roller should be without vibrator and at a fast speed. After this initial compaction, engage the vibrator and select a slow travel speed until the desired finish is obtained.

Never operate the vibrator when the walk behind roller is standing on a hard surface or is stationary on a newly compacted surface or indentations in the surface will occur.

Freewheel Control

The walk behind roller is provided with a freewheeling device which enables the roller to be easily moved without starting the engine.

The control is located at the rear of the roller on the right hand side facing the operator.

To operate the freewheel, push the control knob in a give it a 1/4 turn left or right to lock it in position.

Warranty

Jumping jack products are covered by a warranty for a period of 12 months from the date of purchase against defects in material or workmanship provided that:

-The product concerned has been operated and maintained in accordance with the operating instructions.

-Has not been damaged by accident, misuse or abuse.

-Has not been tampered with or repaired by any unauthorized person.

The owner is responsible for the cost of transportation to and from the authorized repairer and the unit is at the owner’s risk while in transit to and from the repairer.

Impact damage is not covered under warranty. Clutches are not covered under any warranty.

Engines are officially guaranteed by Honda.

Maintenance Record

Jumping jack compactor machine has been assembled with care and will provide years of service. Preventative maintenance and routine service are essential to the long life of your jumping jacks compactor machine. After reading through this manual thoroughly, you will find that you can do some of the regular maintenance yourself. However, when in need of parts or major service, be sure to see your dealer. For your convenience we have provided this space to record relevant data about your jumping jacks compactor machine.