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| Illustration 1 | g01585973 |
The material feed system transfers the mix from the hopper to the screed. Components which move the conveyors and augers make up the material feed system.
The material feed system contains an electrical portion, a hydraulic portion, and a mechanical portion. The electrical portion consists of an ECM and associated input devices and output devices.
The hydraulic portion of the material feed system consists of the following:
- Two tandem hydraulic pumps that are variable displacement piston type pumps
- Four single speed hydraulic motors
Each tandem hydraulic pump contains two rotating groups which are inside a single housing. The rotating groups that are inside one of the pumps provides flow to the right conveyor motor and provides flow to the right auger motor. The rotating groups inside the other pump provide flow to the left conveyor motor and the left auger motor. Propel charge pumps provide charge oil to the material feed pumps.
The mechanical portion of the material feed system contains two chain driven conveyors and the system contains two chain driven augers.