Electrical and Hydraulic Block Diagram
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| Illustration 1 | g00938953 |
Electrical and Hydraulic Block Diagram Illustration 1 contains the following main components: (1) Hydraulic oil tank (2) Oil cooler bypass manifold (3) Hydraulic oil cooler (4) Drag conveyor pump (upper stack) (5) Charge pump (upper stack) (6) Left conveyor motor (7) Hydraulic oil filter (8) Right conveyor motor (9) Drag conveyor pump (lower stack) (10) Left position sensor (11) Right position sensor (12) Toggle switch (left conveyor) (13) Machine electronic control module (14) Toggle switch (right conveyor) (15) Speed ratio control (left conveyor) (16) Speed ratio control (right conveyor) (17) Solenoid (left conveyor) (18) Solenoid (right conveyor) (36) Dial (left mix height) (37) Dial (right mix height) | |
The operator can control a hydraulic function by using the following controls:
(12) Toggle switch (left conveyor)
(14) Toggle switch (right conveyor)
(15) Speed ratio control (left conveyor)
(16) Speed ratio control (right conveyor)
(36) Dial (left mix height)
(37) Dial (right mix height)
The controls will send a signal to the machine electronic control module (ECM). The machine ECM will process the signal before sending a signal to the appropriate solenoids on the piston pumps.
Left position sensor (10) and right position sensor (11) determines the height of the asphalt at the outboard sides of the auger conveyors. The height of the asphalt can be controlled by adjusting dial (36) (left mix height) and dial (37) (right mix height). The machine ECM will process the data from all of the control signals. The machine ECM will adjust the input current to solenoid (17) and solenoid (18) .
Note: The drag conveyors can only travel in the reverse direction. As a result, only two of the four solenoids on the EDC valve will be used.
Charge oil is provided by charge pump (5) to drag conveyor pump (4) (upper stack) and to drag conveyor pump (9) (lower stack). Charge oil is filtered by hydraulic oil filter (7) .
The machine ECM will send the appropriate signal to solenoid (17) and solenoid (18) in order to match the output of the piston pumps to the desired speed of the conveyor motors.
The hydraulic system for the drag conveyors is a closed loop system. This means that most of the oil in the system stays in the system. Some of the oil in the system will be lost by leakage and lubrication. Also, approximately 3.8 L/min (1 US gpm) of oil is sent to the hydraulic oil cooler from the drag conveyor motors. This process will cool and filter the oil that would normally be trapped in the closed loop hydraulic system. Any oil that is lost through lubrication, leakage, and closed loop flushing of the oil is replenished by the charge pump.
Operation of the Drag Conveyor
Planetary Drive and Conveyor
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| Illustration 2 | g00953063 |
Planetary Drive on the Right Side of the Machine (8) Right conveyor motor (19) Planetary drive | |
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| Illustration 3 | g00953067 |
Chain Drive (19) Planetary drive (20) Sprocket (21) Chain (22) Sprocket (23) Sprocket (24) Bolt | |
Note: There is a conveyor motor and a planetary drive for each drag conveyor.
Right conveyor motor (8) turns planetary drive (19). The planetary drive turns sprocket (20) that turns chain (21). Chain (21) turns sprocket (22). Sprocket (22) and sprocket (23) are keyed to the same shaft. Sprocket (23) meshes with the conveyor chain. As a result, when conveyor motor (8) turns, the conveyor will move.
Chain (21) can be tightened by adjusting bolts (24) .
Reference: See Testing and Adjusting, "Conveyor Drive Chain (Drag) - Check and Adjust" in this manual for the correct adjustment procedure.
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| Illustration 4 | g00953068 |
Left Drag Conveyor (25) Drag bar (26) Bed liner plate (27) Drag chain assembly (28) Front takeup shaft (29) Front takeup roller | |
The conveyor contains the following components:
(25) Drag bar
(26) Bed liner plate
(27) Drag chain assembly
(28) Front takeup shaft
(29) Front takeup roller
The drag conveyor consists of drag bars (25) that are connected to two drag chain assemblies (27). The drag chain assembly meshes with front takeup roller (29). Front takeup shaft (28) serves as an adjuster of the drag chain tension for the drag chain assembly.
Reference: See Testing and Adjusting, "Conveyor Chain (Drag) - Check and Adjust" in this manual for the correct adjustment procedure.
Drag Conveyors and Hoppers
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| Illustration 5 | g00953035 |
(30) Left drag conveyor (31) Left hopper (32) Right drag conveyor (33) Right hopper | |
There are two drag conveyors. Each drag conveyor has a hydraulic motor and a planetary drive. Each drag conveyor can be controlled independently from the other drag conveyor. Left drag conveyor (30) is next to left hopper (31). Right drag conveyor (32) is next to right hopper (33) .
Left drag conveyor (30) and right drag conveyor (32) transfers the asphalt mix from the hoppers in the front of the machine to the rear of the machine.
Drag Conveyor Control
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| Illustration 6 | g00953071 |
Left Side of Machine (34) Paddle for left position sensor (35) Location | |
There is one position sensor for each auger conveyor on each side of the machine. Paddle (34) should be adjusted so that the position sensor will be deactivated when the paddle is moved to a 45 degree angle.
An optional electronic sonic sensor is available. This sensor should be mounted at location (35).
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| Illustration 7 | g00964065 |
(12) Toggle switch (left conveyor) (14) Toggle switch (right conveyor) (15) Speed ratio control (left conveyor) (16) Speed ratio control (right conveyor) | |
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| Illustration 8 | g00953175 |
(36) Dial (mix height) | |
When all of the drag conveyor and auger conveyor toggle switches are in the AUTO position, the conveyors will be controlled by the machine ECM.
The machine ECM receives data from the following sources:
(10) Left position sensor
(11) Right position sensor
(12) Toggle switch (left drag conveyor)
(14) Toggle switch (right drag conveyor)
(15) Speed ratio control (left drag conveyor)
(16) Speed ratio control (right drag conveyor)
(36) Dial (left mix height)
(37) Dial (right mix height)
The machine ECM uses this data to control the solenoids on the EDC valve for the piston pumps. Consequently, the speed of each hydraulic motor for the drag conveyors and the auger conveyors is controlled independently.
Reference: Refer to Operation and Maintenance Manual, KEBU7016 for additional information.