TM 5-3895-373-101.14.5ScreedVibrators.The screed is equipped withfour hydraulic vibrators: two main screed vibrators andtwo extension screed vibrators. The vibrators compactthe paving material. A single hydraulic vibration motordrives both main screed vibrators. Each extensionscreed is equipped with a separate vibrator and hydraulicvibration motor. The vibrators vibrate at a frequency setby the paving machine operator. As the eccentric shaftin each vibrator spins, the eccentric weight in the shaftcauses vibrations due to its off-center weight. Thevibrators mount directly to the screed plate and causethe plate to vibrate with them. This vibrating motionprovides the initial compaction to the paving materialbeneath the screed.1.14.6 Screed Burners/Blowers. The main andextension screeds are equipped with burner/blower pairs.Each burner/blower pair operates together to increasethe temperature of the screed plates to 300°F (150°C).Each half of the main screed, and each extensionscreed, is equipped with an individual burner/blower pair.Diesel fuel sprays into the burners and ignites from theheat of a glow plug. The blower evenly distributes theheat from the burner across the screed plate. Eachscreed crew control box contains control switches for theburners and blowers. The left control box has the onlycontrol for the screed burner fuel pump. Both the rightand left control boxes include controls for the burner1-10
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