LEVER AS 3478755 - Caterpillar

Ballasting Information
In order to obtain the proper wheel loads to meet the requirements of the job, it may be necessary to add or remove ballast. In the absence of specific guidelines, the general rule is to have a wheel load of 1820 kg (4,000 lb) and a tire inflation pressure of 380 kPa (55 psi).In the case of less sticky materials, the tire pressure should be reduced. In the case of fine gravel or other similar material, the highest allowable pressure should be used.Ballast compartments are positioned with a calculated balance of wheel to weight ratio. Internal frame baffles help prevent surges when water ballasted.Water can be added through a fill port and can be drained through a drain plug.Water ballast capacity: 5.0 cubic meters (176.6 cubic feet.Road Water Spray System Operation
Valve Positions
Position valves (1), (2) and (3), as shown, to fill the ballast tank using an external suction hose connected to the suction fitting. The road water spray switch must be in bypass position and the discharge fitting must be plugged with the plug provided with the machine. Position valves (1), (2) and (3), as shown, to transfer water from an external suction hose to an external discharge hose. The road water spray switch must be in bypass position and an external discharge hose must be connected to the discharge fitting. Position valves (1), (2) and (3), as shown, to transfer water from the ballast tank to an external discharge hose. The road water spray switch must be in bypass position and an external discharge hose must be connected to the discharge fitting. Position valves (1), (2) and (3), as shown, to spray water from the ballast tank to the rear spray nozzles. Valve (3) may be adjusted to control the flow of water discharged from the spray nozzles. When not using the spray nozzles, valve (3) should be closed to prevent water leakage at the nozzles. The discharge fitting must be plugged with the plug provided with the machine.
(4) Suction Fitting (5). Discharge Fitting.Compacting Procedures
Of all the variables in asphalt compaction, the temperature of the mix at the time of compaction is probably the most significant.If the temperature is too high, the mix will disperse easily under the force of the compactor causing waves and creases.If the temperature is too low, the mix will be difficult to compact. Such things as ambient air temperature, base temperature, wind conditions, aggregate size, viscosity of the asphalt and the thickness of the mat are all factors influencing the proper mix temperature. What is desired, is a temperature high enough to allow time to achieve compaction before it cools too much for further compacting to be effective.The cooling time of the asphalt mix must be kept in mind as this will partly determine the speed required of the compactor. For efficient compaction, it is generally agreed upon that density must be reached before the asphalt mix cools to 79°C (175°F).If at all possible, set up a test strip before the