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The Penta 4540 is a single-auger TMR mixer for blending forage and other ration ingredients. The listed package combines a Hurricane auger with a rubber tub extension, Digi-Star scale and a flip-up conveyor for feeding along the bunk.
The scale helps the operator weigh ingredients as they are loaded. Hydraulic conveyor lift allows the discharge height to be adjusted, and the single-axle trailer includes flotation tires and rear lights. Additional knives and an auger magnet are available separately.
| Specification | Details |
|---|---|
| Capacity | 437 cu ft with 9-inch rubber tub extension |
| Scale System | Digi-Star EZ2800 |
| Auger Type | Hurricane |
| Conveyor | 3′ flip-up hydraulically raised |
| Tires | 445/45R19.5 flotation |
| PTO | 540 RPM CV PTO |
| Trailer Type | Single-axle, light kit included |
Tell us the batch size, forage ingredients and bunk height, and we can check the mixer and conveyor setup for your feeding routine. We can also confirm loading clearance with the selected tires and tub extension.
Pay by card at checkout, or choose Reserve for $0. We’ll confirm the product, selected options, availability, taxes, and pickup or delivery. Reservations are held for 7 days.
After confirmation, you can arrange payment by check, ACH or wire transfer, or discuss financing. Financing may be available when at least $5,000 of qualifying equipment is financed, subject to credit and underwriting approval.
We ship parts and equipment nationwide by parcel or freight. Pickup is available at our Henderson, Iowa store. We’ll confirm timing and the fulfillment plan with you before your order is released.
Talk with our equipment and parts team before you order. We can help compare models, explain the listed configuration, or review a part number with you.
Our Henderson, Iowa team includes dedicated parts and warranty staff. If you need a replacement part or help with a manufacturer warranty question, contact us with the model and serial number of your equipment.
Call 712-566-1033 or use the specialist button above. Meet our support team.

Family owned in Henderson, Iowa
“Excellent service before and after the sale, very knowledgeable about the products they offer.”
Family-owned since 1980
The Keast family's farming roots in Southwest Iowa reach back to the 1870s, when Thomas Keast settled near Macedonia. Russ began selling equipment on the family farm in 1980, bringing firsthand experience and a practical understanding of how machinery needs to perform in the field. Today, Keast Enterprises serves customers across the country, with the same dedication to fair prices, dependable support, and quality products.
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Product details, availability, and features may change. Contact us if you need us to confirm any detail before ordering.