Don Allison Equipment, Inc.

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H&S Manufacturing HDNR 7+4 Forage Box

H&S HDNR 7+4 Forage Box
The H&S 7+4 Front and Rear Unload Boxes have the option of being ordered with PTO rear drive or hydraulic rear drive.
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Dual Belt Clutch

H&S Manufacturing HDNR 7+4 Forage Box
Shields are removed to show the dual belt clutch which is the primary drive source. The emergency stop mechanism is built into the drive unit and can be activated from the front, sides or rear of the box. A separate clutch allows you to start and clear the beaters before you start the main apron conveyors. A simple, trouble-free variable speed drive lets you match just the right unload speed to the crop type, load condition and blower capacity. Main apron unload rate is variable and ranges from 9" up to 11' 6" per minute.

3-18" 4 Bar HD Beaters

H&S Manufacturing HDNR 7+4 Forage Box
H&S uses three - 18" 4 bar HD spiral type beaters, not augers. These beaters are aggressive in handling tough material and provide an even feed. All three beaters are mounted in the head, not auxiliary panels in the box. Beater shafts are 1 1/4" and equipped with greaseable bearings.

Automatic Tailgate Lock and Unlock

H&S Manufacturing HDNR 7+4 Forage Box
Once the tailgate safety lock is released, the self-locking mechanism unlocks automatically while unloading and locks shut when the tailgate closes.

Cross Z-Iron

H&S Manufacturing HDNR 7+4 Forage Box
All industrial forage boxes feature cross Z-iron. Cross Z's are welded to the side channels inline with stakes for added strength.

Optional Grain Hopper and Front Enclosure

H&S Manufacturing HDNR 7+4 Forage Box
Aluminized front and rear unload industrial box with optional grain hopper, front enclosure and fold down extension.

Rear Unload Drive System

H&S Manufacturing HDNR 7+4 Forage Box
An optional rear unload drive system with a quick change pin is available on all HDNR forage boxes.

Optional Grain Hopper

H&S Manufacturing HDNR 7+4 Forage Box
An optional grain hopper gravity unload for small grains is available for wide body boxes with a top hinged gate.

Front-to-Rear Electric Roll Tarp

H&S Manufacturing HDNR 7+4 Forage Box
The optional front-to-rear electric roll tarp is a nice feature to keep that valuable forage from blowing out during transport.

Side to Side Electric Roll Tarp

H&S Manufacturing HDNR 7+4 Forage Box
Shown with the optional heavy-duty side-to-side electric roll tarp.

Optional Cross Conveyor Extension

H&S Manufacturing HDNR 7+4 Forage Box
An optional 12" folding cross conveyor extension can be ordered only on the 7+4.
Aluminized Wide Body Forage Box Specifications
Inside Width
7' 4"
7' 4"
7' 4"
Inside Height (floor to top of side)
Inside Length
Overall Width
Overall Length
Front 20' 7"
F&R 21' 6"
Front 22' 7"
F&R 23' 6"
Front 24' 7"
F&R 25' 6"
Standard Box Side Height 
Std Box Overall Height at Top Pivots Door
Front Unload Box Capacity
913 cu.ft.
1018 cu.ft.
1123 cu.ft.
Front & Rear Unload Box Capacity
933 cu.ft.
1038 cu.ft.
1143 cu.ft.
Weight - Front Unload
Weight - Front & Rear Unload
Apron Chain - Front Unload Box
T-rod chain std / 667H, 667X & 667XH optional
Apron Chain - Front & Rear Unload
667H Pintle chain std / 667X & 667XH optional
Cross Feed
22" wide - CA550 chain with welded slats
right or left discharge
Unloading Beaters
3-18" 4 bar spiral even feed
Main Apron Speed
Variable speed drive, 12 unload speeds
Front Drive Sequence
Bronze worm gear box, #80 roller chain,
1 3/4" main apron drive shaft
Power Source
540 pto or hydraulic drive
Emergency Stop Clutch
Rear Unload Drive
Hydraulic rear drive
Rear Unload Speed
Unload time is dependent on tractor RPM,
hydraulic pressure and GPM
Rear Endgate
Automatic lock and unlock
Rear Gate Relay