SERVICE

METERING ROLL SERVICING

The speed reducer gear box.

tional adjustment as it is completely controlled from the control box.

3. Speed reducer gear box: The

direct drive gear box provides

the required speed reduction,

and transmits power to the me-

tering rolls through a drive chain

arrangement. The gear box does

not require adjustment. The drive

chain should also be periodically

lubricated and retensioned as

necessary.

4. Unload auger time delay: The

delay controls the bottom auger

system and causes the unload

auger (and any connected aux-

iliary unloading conveyors) to

This dryer is equipped with SCR metering roll drive assembly. The metering rolls are driven by a sepa- rate DC type electric motor. The speed of the motor is variable and is controlled by an electric SCR (sili- con controlled rectifier) control within the main control box.

MAIN CONTROLS

1.SCR speed control: The control unit dial on the front of the control box regulates the speed of the DC motor which drives the meter- ing rolls.

The markings on the scale from 0 to 999 represent the flow of grain past the metering rolls as a percent of the maximum grain discharge rate for the dryer. The maximum setting of 999 provides a maximum 100% dis-

charge of 1120 BPH for 1108, 1400 BPH for 1110, 1680 BPH for 1112, 1960 BPH for 1114, 2240 BPH for 1116, 2520 BPH for 1118, 2800 BPH for 1120, 3080 BPH for 1122 and 3640 BPH for 1126 model dryers.

Note: When the control is set to the maximum discharge rate (999), the metering roll speed should be

9.75RPM for 6" discharge and 17.5 RPM for 8" discharge auger.

2.DC electric motor: The direct current (DC) motor provides the drive for the metering roll, and is located on the front left hand side of standard model dryers. The output shaft of the motor

is connected directly to the gear box assembly.

The DC motor requires no opera-

continue operating for the pro-

grammed amount of time, even

after the metering rolls stop.

This feature permits the cleanout

of grain within the unloading

equipment at the end of all dis-

charge cycles.

5. Ifaforeignobjectbecomes lodged

in the metering rolls and jams

the system, the following events

will occur. The unloading auger

will stay in motion. However,

the metering roll drive will stop

and the DC motor should stall

out. The Electronic Monitor-

ing Control System will shut

down the dryer after a two minute

period. If any one metering roll or

sensor should malfunction the

control will display a left or right

metering roll failure warning.

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Airstream PNEG-339 service manual Metering Roll Servicing, Main Controls
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PNEG-339 specifications

The Airstream PNEG-339 is a highly regarded model in the realm of agricultural storage and handling equipment, specifically designed for grain management. Its innovative features and robust technologies make it a valuable asset for farmers and grain handlers seeking efficiency and reliability.

One of the primary characteristics of the PNEG-339 is its seamless construction. Built with high-quality materials, the unit is engineered to withstand the rigors of outdoor environments while providing durable protection for stored grains. The design minimizes maintenance requirements, ensuring that users can focus on their core agricultural operations without the distraction of frequent repairs.

The PNEG-339 is equipped with advanced aeration systems that enhance the preservation of grain quality. This technology allows for optimal airflow circulation, reducing moisture levels and minimizing the risk of spoilage. By maintaining the ideal conditions for grain storage, farmers can ensure better yields and profitability.

Another notable feature of the PNEG-339 is its scalability. This model can easily be integrated into existing grain handling systems, accommodating various storage capacities. Whether managing small-scale operations or large agricultural enterprises, the PNEG-339 offers flexibility in design and implementation, making it suitable for diverse agricultural needs.

The unit also boasts user-friendly controls and monitoring systems, allowing operators to manage grain conditions efficiently. Real-time data and automated alerts assist in maintaining optimal storage conditions, thus reducing labor costs and enhancing operational efficiency. As a result, farmers can make informed decisions quickly and effectively.

Additionally, the PNEG-339 incorporates energy-efficient technologies that contribute to sustainability in agriculture. By utilizing energy-saving components, this model not only lowers operational costs but also aligns with the growing emphasis on environmentally responsible farming practices.

Overall, the Airstream PNEG-339 stands out as a top-tier choice for grain storage and handling. With its durable construction, advanced aeration systems, scalability, user-friendly controls, and energy efficiency, it meets the demands of modern agricultural operations. Its design and functionality reflect a commitment to quality and performance, making it an essential tool for those in the agricultural sector aiming to enhance their productivity and maintain the integrity of their grain stores.
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