The Miller Pro forage box is well recognized for its exceptional performance, reliability and long-lasting durability. Today's high capacity forage harvesting requires faster ways of getting the job done. Art's Way offers Miller Pro boxes for both truck and trailer mount to meet these needs. They can run behind or along side self-propelled forage harvesters. Art's Way offers an extensive line of forage handling equipment to help you bring in higher quality forage, and get it into your silos, bunkers or bags faster. You'll find several models to choose to add convenience to your work. The entire line is available either with roofs or as open top models. Truck mount and trailer models add more choices to fill every need.
The Miller Pro forage boxes are the longest forage handling line in the industry and offer excellence in design, state of the art manufacturing, highest quality of material plus exceptional fit and finish. The exclusive 4-speed shift-under-load enclosed gear transmission is the only offering of its kind in the industry. Consistency of speeds is a major advantage of the 4-speed positive gear transmission. Control is smooth and predictable and clean out is faster with speeds up to 12.1 ft/min. When looking to improve your forage quality with high capacity harvesting, look to the long standing Miller Pro line from Art's Way Manufacturing.

Improving forage quality... with high capacity harvesting
Today's high capacity forage harvesting requires bigger forage boxes and faster ways of getting the job done. Miller Pro offers receiver boxes for both truck and trailer mount to meet these needs. They can be side loaded with Miller Pro high lift dump boxes, or can run behind or along side self-propelled forage harvesters. Miller Pro offers an extensive line of forage handling equipment to help you bring in higher quality forage, and get it into your silos, bunkers or bags faster.
A growing line...
You'll find more models to choose from, plus new configurations to add convenience to your work. The entire line is available either with roofs or as open top models. Truck mount and trailer models add more choices to fill every need.
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Higher capacity...
The entire line is available in box lengths up to 20 feet.
Optional 4' higher roof or side extensions add even
more capacity. Heavy weight constructed running gear
is available in either single or tandem axle wagons or tandem axle trailers. |
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Receiver Boxes
Receiver boxes are ideal for top filling because there are no obstructions such as rafters or supports in the center of the box. The sides are reinforced with both a heavy "Z" shaped side sill and a massive structural beam going full length on the top edge of both sides along with a cross support at the front and rear of the forage box. The side stakes are the largest in the industry measuring an impressive 5" x 2-1/2" in size.
Side Extensions and 4th Beater
The receiver boxes can be fitted with side extensions to increase the load capacity. With the side extensions it is recommended that an optioanl fourth beater be added to ensure a smooth flow of material to the blower.
Trailer Mounted Receiver Boxes
The MILLER PRO 5300 receiver box mounted on a tandem trailer is an ideal way to handle the needs of having to fill bags and upright silos along with bunker silos while obtaining a smooth ride with good trailing and maneuverability. It is not uncommon to be able to travel one or two gears faster in field conditions than with a conventional steerable wagon.
PTO drive lines can remain attached to the tractor. You can start the PTO before leaving the tractor saving two trips in and out of your tractor cab not having to attach and detach the PTO drive line while at the blower or bagger. While using in a bunker situation it is not necessary to leave the tractor at all.
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5300 Series Highlights
The Miller Pro forage box is well recognized for its exceptional performance, reliability and long-lasting durability.
- Excellence in design, state-of-the-art manufacturing, highest quality materials plus exceptional fit and finish
- Longest forage handling line in the industry including front unload, front/rear combination models, rear unload, receiver boxes, forage blowers and high lift dump boxes
- Ease of control, designed for safer operation
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- Unitized high strength steel box with Field Flex™ design
- 4-speed shift-under-load enclosed gear transmission
- Independent feathering clutches for optimum control
- Smooth feeding metering augers
- Crop Clear™ rafterless roof
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Superior strength EX-TEN© steel is 67% stronger than conventional steel, more capable of handling the stress of heavy loads and long years of service. |
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Fold Down Cross Conveyor Extension
An optional 18" (30" overall) fold down cross conveyor extension makes it very easy to approach the blower, especially with today's large tractors. The fold down extension can also be used for bunk feeding. A spring assist makes it quick and easy to fold. When folded the extension closes off the cross conveyor opening. |
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Truck Mount Forage Boxes
The complete line of MILLER PRO forage boxes is available in truck mount versions. Drive systems can be either hydraulic or mechanical. These boxes can be front unload, rear unload or front/rear unload, with or without roofs, side extensions or fourth beater. |
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Unique dual feathering clutches.
Maximum control. Easy operation.
4-Speed Transmission
 Exclusive. Provides a simple and positive gear-to-gear drive for smooth unloading under all crop conditions. Massive bronze worm gear and rugged gear train operate inside a sealed oil bath. Beefy design includes heavy drive collar, large output shaft and heavy detent springs.
 Consistency of speeds is a major advantage of our 4-speed positive gear transmission. Control is smooth and predictable. Cleanout is faster with speeds up to 12.1 ft/min. Variable speed drives on other boxes cause the apron speed to fluctuate as a result of the ever-changing load.
Crop Clear™ rafterless roof
 Allows unobstructed rafter-free crop loading and unloading. Corrugated and formed heavy gauge aluminized steel has superior strength, appearance and corrosion resistance. Heavy duty roof edge protector. Removable in sections for loading combined corn.
18" Metering Augers
 Provide the most uniform feed flow in the industry. Large diameter prevents undercutting. Welded chipper tines start easily in tightly packed loads. Top auger setback practically eliminates carryover and enhances unloading performance by creating a smooth flowing waterfall of crop. |
Front Drive System
The front drive chain is spring loaded to ensure the proper tension and eliminates chain whip.
Independent Drives for Auger and Outfeed - Unequalled Crop Unloading Control
 Exclusive feathering clutch system coupled with a shift-under-load 4-speed gear box lets the operator start extra full loads smoothly, and provide positive, direct unloading speeds.
Outfeed Feathering Clutch
 Allows the operator to feather the outfeed apron to help start heavy loads slowly, without producing clumps that can block your forage blower. This clutch is also the quick-release safety clutch. The PTO turns freely for easy hookup.
Metering Auger Feathering Clutch
 Allows the operatir to feather the augers to clean them, without bringing the load forward. Single handle allows operator to stop and/or feather the augers to ease a big clump into the outfeed. No other forage box has this user-friendly system...some have no clutch at all.
Centralized Operator Controls
 Provides easy access to unloading controls from either side
 Low sight holes for good visibility
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 Neutral gear placed between all speeds
 Safety clutches easy to reset |
Cross Conveyor Chain Restraints
 Reduces potential residue buildup over full length of cross conveyor
Removable Cleanout Panel
 Bottom of unit pan has access panel for easy seasonal cleanout of material
Drive Line Safety Shields Swing Open
 Sheilding on gearbox and belt drive systems is smaller, more secure and provides easier access. Front hinge prevents panels from catching the wind during transport if accidently left unlatched
Heavy Duty Needle Bearing PTO Driveline
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PTO or Hydraulic Drive
 PTO drive unloads in as little as 30 seconds. Hydraulic drive unloading time varies with tractor hydraulics. Box Floor
 Is 5/8" pressure treated marine grade plywood. Front/rear unload boxes have super slippery poly clad floor to reduce friction and stress in either direction.
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Automatic Rear Door
 Opens automatically when unloading apron is engaged. Closes and relocks when box is empty without having operator leave the tractor.
Unobstructed Unloading
 Rear door hinge point is as high as the roof so tops of loads aren't shaved off. |
Oven Cured Primary & Finish Coating
 Assures superior corrosion protection, and creates the best appearance of any forage box on the market
Front/Rear Unload • 2 Direction Drive
 Unloading direction is easy to change and requires no tools. Simply move a drive coupler from the front shaft to the rear shaft, or vice versa. No need for time-consuming changing of drive chains.
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Transport Safety
All Miller Pro forage boxes have as standard equipment 2 amber flashing and 2 red tail lamps, along with a slow moving vehicle sign and amber and red reflective tape marking the sides and rear of the forage box. |
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17 Ton Wagon
The 17 ton wagon was designed specifically for use with forage boxes. MILLER PRO has designed this wagon to accept large tires such as 4.45 x 22.5 super single truck tires while still keeping the majority of the tire under the forage box while maintaining an impressive 56 degree turning radius. Riser kits are not needed with this wagon! |
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17 Ton Receiver Box Trailer
MILLER PRO has designed a tandem axle trailer to be used with receiver boxes. This system is a great way to transport forage quickly and smoothly through fields while placing no twisting strain at all on the forage box while going through waterways and field approaches. In normal field conditions it is possible to go a gear or two faster than with a conventional steerable wagon!
 The trailer is extremely well built with a massive main beam (heavy wall structural steel tubing) running the full length of the trailer. This supports a heavy framework of structural steel tubing. |
| 5300 Series SPECIFICATIONS |
| Unloading Configuration |
Front Unload |
Front/Rear |
Rear Unload |
| Model |
5300-16F |
5300-18F |
5300-20F |
5300-18F/R |
5300-20F/R |
5300-18R |
5300-20R |
| Box Size Floor Length (ft) |
16 |
18 |
20 |
18 |
20 |
18 |
20 |
| Capacity w/ roof ASAE std (cu ft) |
866 |
977 |
1085 |
981 |
1090 |
1002 |
1113 |
| Capacity less roof ASAE std (cu ft) |
713 |
805 |
894 |
810 |
900 |
822 |
913 |
Capacity less roof w/ side
extensions
struck ASAE std (cu ft) |
866 |
977 |
1085 |
981 |
1090 |
1002 |
1113 |
| Inside Width |
88" |
| Inside Height w/ std roof |
93" |
| Inside Height w/ 4" higher roof |
97" |
| Overall Width |
109" |
109" |
109" |
109" |
109" |
104" |
104" |
| Overall height w/ std roof |
115" |
| Overall height w/ side extension |
112-1/2" |
| Overall Length |
232" |
256" |
280" |
271" |
295" |
243" |
264" |
| Weight w/ roof (lbs) |
4100 |
4310 |
4720 |
5050 |
5460 |
3690 |
4070 |
| Main apron pintle chain |
#667H - 4 per box @ 10,000 lb min. pull each |
| Optional apron pintle chain |
#667X - 4 per box @ 10,000 lb min. pull each |
| Crossfeed Delivery |
Left or Right |
Left only |
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| Crossfeed Apron Width |
22" |
22" |
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| Crossfeed Conveyor Apron |
CA 550 roller chain with welded slats |
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| Crossfeed Clean-Out Door |
Yes |
Yes |
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| Crossfeed Conveyor Ext. - std |
12" stationary |
12" stationary |
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| Crossfeed Conveyor Ext. - opt |
18" fold up with spring assist (30" overall) |
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| Unloading Metering Augers |
Three 18" diameter drum style with 2" tines |
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| Safety Clutch |
Quick release push bar at front
Cable on cutfeed side - quick re-engage |
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| Power Source - Front Unload |
540 RPM PTO drive - optional hyd. motor drive |
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| Power Source - Rear Unload |
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PTO or hyd. drive |
| Box Hold Down Kit |
Standard |
| Transport Lights |
Standard |
| Rear Door Latch |
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Positive spring loaded - pins in notch |
| 4" Higher Roof |
Optional on all models |
| Side Extension Kit |
Optional on all models |
| Fourth Beater |
Optional on all models with side extensions |
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Some equipment is shown here with safety shields open or removed. Never operate equipment with safety shields open or removed.
| TRAILER SPECIFICATIONS |
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Standard |
XL |
| Rated Capacity |
30,000 lbs |
30,000 lbs |
| Approx Height with 16.5x22.5 tires |
33" |
33" |
| Overall Length |
270" |
293" |
| Length from pin hole to oscillation |
213" |
231" |
| Tread Width |
81-3/4" |
81-3/4" |
| Spindle Diameter |
2-3/4" |
2-3/4" |
| Hubs |
8-bolt |
8-bolt |
| Bolster Stake Width |
42" |
42" |
Bolster stake adjustment fore & aft
Bolster stakes adjust at 3-3/4" intervals |
113.5" to 154.5" |
113.5" to 154.5" |
| WAGON SPECIFICATIONS |
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12TT-6 |
12T-8 |
14TT-8 |
15T-8 |
17T-8 |
18TT-8 |
| ASAE Rated Cap. (tons) |
12 |
12 |
14 |
15 |
17 |
18 |
| Approx. Weight w/o tires |
1,282 lbs. |
938 lbs. |
1,324 lbs. |
1,230lbs. |
1,490 lbs. |
1,822 lbs. |
| Approx. Weight w/ tires |
1,484 lbs. |
1,086 lbs. |
1,548 lbs. |
1,520 lbs. |
2,553 lbs. ** |
2,380 lbs. |
| Height |
26" from bolsterto ground
with 12.5Lx15" tires
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32"
w/14Lx16.1" |
37-1/2"
w/425x22.5" |
32"
w/14Lx16.1"
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| Tread Width |
80" |
80" |
80" |
80" |
81" |
80" |
| Spindle Diameter |
2" |
2-1/4" |
2-1/4" |
2-1/4" |
3" |
2-1/4" |
| Hubs |
6-bolt |
8-bolt |
8-bolt |
8-bolt |
8-bolt |
8-bolt |
| Bolster Stake Spacing |
42" is standard - kit to reduce spacing to 38" is optional |
| Adjustable extending hitch for telepole |
96" extra long telepole for forage boxes
77" is available for bale racks and gravity boxes
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| Easy-lift Telepole |
Adjustable spring assist is standard |
| Wheelbase, adjustable with C-section reach |
Standard - 105" to 150"
Options inlcude 90" to 120" or 150" to 180" |
147" to 177" |
same as 15 ton |
| Turning Radius |
60' |
60'* |
60' |
57' |
56'** |
57' |
| Tandem |
Yes |
No |
Yes |
No |
No |
Yes |
| Inertia Hydraulic Brakes |
N/A |
Opt. |
Opt. |
Opt. |
Opt. |
Opt. |
| Rear Hitch Point |
No |
Yes |
No |
Yes |
No |
No |
Options
* 55' w/ 16.5x16.1 tires
** w/ 425x22.5 tires |
Standard wheel is 15" x 10"
Multiple sizes and ratings of wheels and tires are available
38" Bolster Kit see Bolster Stake Spacing above
Safety Chain: recommended for highway towing |
All running gear are designed for farm use at tractor speeds to a maximum of 20 mph. Capacities apply only when equipped with properly rated tires.

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