AS4251C Asphalt Paver Operator Controls - Right Control Panel Caterpillar


Operator Controls - Right Control Panel
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1.1. Left Tow Point Control (1)
2.1. Right Auger Speed Control (2)
3.1. Conveyor Control (3)
4.1. Emergency Stop Switch (4)
5.2. Type I
6.2. Type II
7.1. Right Tow Point Control (5)
8.1. Right Extension Control (6)
9.1. Horn (7)
10.1. Right Conveyor Control (8)
11.1. Right Auger Control (9)



Illustration 1g01951477

(1) Left tow point control

(2) Right auger speed control

(3) Conveyor control

(4) Emergency stop switch

(5) Right tow point control

(6) Right extension control

(7) Horn

(8) Right conveyor control

(9) Right auger control

Note: The engine stop switch should only be used when rapid engine shutdown is necessary. Refer to the machine's Operation and Maintenance Manual, "Stopping the Engine" in order to shut down the machine properly.

Left Tow Point Control (1)


Left tow point control - Press and hold the left tow point control upward in order to increase the thickness of the mat on the left side of the screed. Press and hold the left tow point control downward in order to decrease the thickness of the mat on the left side of the screed. When you release the switch, the switch will automatically return to the center position. The screed will remain in the last selected position.

Right Auger Speed Control (2)


Right Auger Speed Control - Turn knob (2) clockwise in order to increase the head of the material in front of the screed. Turn knob (2) counterclockwise in order to decrease the head of the material in front of the screed.

Note: The auger control (9) must be in the AUTO position in order to change the head of the material in front of the screed.

Conveyor Control (3)


Right Conveyor - Hold switch (3) upward in order to stop the right conveyor. The right conveyor will stop rotating. Once you release the switch, (3) the switch will return to the CENTER position. The right conveyor will resume normal operation.


Automatic Mode - The automatic mode is the CENTER position for the conveyor control. When switch (3) is in the CENTER position, the conveyor will operate at the set speed.


Left Conveyor and Right Conveyor - Press and hold switch (3) downward in order to stop the conveyor system for the machine. Both the left conveyor and the right conveyor will stop operating. Release switch (3) in order to resume normal operation.

Emergency Stop Switch (4)

Type I


Engine stop switch - Push the switch downward in order to stop the engine. When you depress the switch, the machine will not operate and the engine will not run. Pull the switch upward in order to set the switch to the OFF position. All engine stop switches must be in the OFF position in order to operate the machine.

Type II


Emergency stop switch - Push the switch downward in order to stop the engine. When you depress the switch, the machine will not operate and the engine will not run. Pull the switch upward in order to set the switch to the OFF position. All emergency stop switches must be in the OFF position in order to operate the machine.

Right Tow Point Control (5)


Right tow point control - Press and hold the right tow point control upward in order to increase the thickness of the mat on the right side of the screed. Press and hold the right tow point control downward in order to decrease the thickness of the mat on the right side of the screed. When you release the switch, the switch will automatically return to the center position. The screed will remain in the last selected position.

Right Extension Control (6)


Right extension control - Hold switch (6) to the right in order to extend the right extension. Hold switch (6) to the left in order to retract the right extension. When you release switch, (6) the extension will remain in the last selected position. Switch (6) will return to the center position.

Horn (7)


Horn - Press down on button (7) in order to sound the horn.

Right Conveyor Control (8)


Left Conveyor Control - The switch for the right conveyor control (8) is used in order to control the rotation of the conveyor.


Reverse - Hold switch (8) upward in order to manually operate the right conveyor in the reverse direction. Run the conveyor in the reverse direction in order to free up jammed material in the hopper. Release switch (8) in order to return the conveyor to the automatic mode.


Automatic Mode - The automatic mode is the default operating mode for the conveyor.


Manual - Hold switch (8) downward in order to operate the right conveyor in the manual mode. While the conveyor is in the manual mode, the speed of the conveyor can be adjusted by turning knob (2) .

Right Auger Control (9)


Auger Control - The right auger control changes the rotational direction of the right auger.


Manual - Move switch (9) to the right in order to set the auger to the manual position. When switch (9) is in the manual position, the auger will move the asphalt from the center of the screed to the outer edges of the screed.


Automatic Mode - Release switch (9) in order to return the auger to the automatic operating mode. This is the default position for switch (9) .


Reverse - Move switch (9) to the left in order to set the auger to the reverse position. When switch (9) is in the reverse position, the auger will move the asphalt from the outer edges of the screed toward the center of the screed.

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