Dirt Dog HDGRB Heavy-Duty Road Grader Box | 102" Overall Width | 72-90 HP For Tractors
Included Options:
DESCRIPTION
The Dirt Dog HDGRB Heavy-Duty Road Grader Box is the perfect solution for dirt and gravel road maintenance, ensuring smooth and even surfaces with less effort. This grader’s dual forward-mounted cutting edges churn and boil material, smoothing out rough patches and filling low spots without leaving potholes or windrows.
With a heavy-duty triple-lug hitch and 4" × 4" × 3/8" scarifier box, the HDGRB grader is built for durability and stability, even in the toughest conditions. The 1/2" × 6" reversible cutting edges are designed to handle years of demanding use, while the bolt-on replaceable skids allow for easy maintenance and adjustable cutting depth.
The Category I and II Quick Hitch compatibility ensures fast and secure attachment to a wide range of tractors. Designed for tractors with 72 HP (4WD) to 90 HP (2WD), this grader box is ideal for farmers, construction crews, and property managers who need reliable road maintenance equipment.
Key Features
Perfect for Dirt & Gravel Road Maintenance – Dual forward‑mounted cutting edges churn and “boil” material for a smooth, pothole‑free finish.
Reduced Maintenance Needs – Leaves roads in such good condition that upkeep intervals are greatly extended.
Overall Working Width: 102″ (8 ft) for wide coverage with fewer passes.
Horsepower Range: Rated for 90 HP (2WD) or 72 HP (4WD) tractors — delivering the muscle needed for heavy road work.
Category I & II Quick Hitch Compatible – Attaches quickly to a wide range of tractors without extra adapters.
Triple Lug Hitch – Reinforced for maximum stability and long service life under load.
Adjustable Cutting Depth – Tailor grading intensity for various materials and terrain types.
Bolt‑On Replaceable Skids – Easy to swap when worn, extending tool life and lowering maintenance costs.
Dual ½″ × 6″ Cutting Edges at 6° – Bolt‑on, reversible, and replaceable high‑carbon steel for versatility and durability.
4″ × 4″ × 3/8″ Scarifier Box – Rugged steel frame to break up compacted surfaces before smoothing.
Multiple Color Options – Red, Green, Orange, Blue, or Yellow powder‑coat for corrosion resistance and customization.
Detailed Specifications
Specification
Details
Overall Height
34 7/16 inches
Overall Width
102 inches (8 ft)
Overall Depth
54 7/16 inches
Box Height
15 7/8 inches
Weight with Shanks
800 lbs (8 ft)
Scarifier Box Size
4" × 4" × 3/8" steel
# of Shanks
8 (8 ft)
# of Plow Bolts
16 (8 ft)
Lower Hitch Pin Height
14 ½ inches
Horse Power (2WD-4WD)
90 HP (2WD), 72 HP (4WD)
Cutting Edge
1/2" × 6", Bolt-on, Reversible, Replaceable
Bolt on Skids
1/2" × 2 ½ inches
Hitch Type
3-Point Category I & II Quick Hitch
Paint Options
Red, Green, Orange, Blue, or Yellow Powder Coat Paint
Ripping It Outdoors works closely with our manufacturers to supply and support your products warranty needs as best as possible!
The majority of products come with a manufacturer represented warranty against manufacturing defects for at least a 12 month period after the date of sale.
Expendable components and "wear parts" including but not limited to blades, knives, teeth, oil, chain sprockets, skid shoes, knife mounting discs, and similar components are usually excluded from manufacturer warranties.
Please reach out to us for any specific warranty information needed about products and parts you can’t find!
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Shipping
General Shipping Info:
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Customer Reviews
Overall rating: 4.6 / 5 from 102 reviews.
I've started using the mulcher I on several parcels of land 10 acres . I have grind down a couple of 14 inch stumps. Caution the mount bracket behind the mulcher motor exhaust gets extremely hot even with gloves on . But the unit so far seems to works very good it's well put together.
The Firminator G3 is s heavy duty quality machine. The discs worked extremely well and planting and culti-packing is very smooth and easy. Working with Dillon at Ripping It Outdoors was a very good experience and seamless transaction.
Just got my Buffalo Turbine! Love it. Took a little bit to get used to getting the right angle for the nozzle, but not a problem. Side note, works much better if the frame is level as much as possible.
Love it!
Gary Haddock
Seems to be in order delivery wasn't able to use lift gate but tractor was able to take pallet off the truck bed. No damage to machine after visual check. won't know how it runs until rain stops.
Staff at RippingitOutdoors was very quick to call and double check the type of backet needed for the unit to ensure the online order matched( to fit my skid steer quick attachment on my l2501 Kubota). Explained the teeth & belt could be ordered through them directly over the phone when/if needed as well as selling other types of custom made brackets for Utv's ect. All around Great customer service and would purchase from again.
After spending way to much money for forest mulching services I discovered this wonderful machine. It's not a giant powerhouse forest mulcher, but it does everything a property owner needs to maintain a forested property. I wish I would have found it sooner.
The Firminator is well built and functions well. I am having some trouble while planting mixed size seeds. Next time out I’ll try setting it so only the smaller seeds drop out the open it up for the larger seeds.
easy buying process and great communication. Mulcher works great, easily clears overgrown brush and even mulched a 5" thick mulberry tree fairly easily. running it off of my old 331 bobcat with no problem powering the drum at all. Only small issue which isn't a big deal is that the supplied hoses are about 16" too short to operate a full range of motion.
Over all built well. I like it is all cast iron and metal and not plastic. Had to modify fertilizer disc mount to fit correctly, nothing major, a little grinding. I modified the center link hitch point to accommodate my John Deere quick hitch. Have yet to plant with it but I’m sure it will work perfect. Love the grease fittings everywhere. Reminds me of the old farm equipment I grew up on, and still use periodically.
My firminator RT was delivered in good condition in ND. I will be using it next week. I have a 45 HP John Deere tractor that is supposed to lift 2000 lb but really struggles to lift this 6 foot firminator RT. I will just have to use in as a two pass operation for now.
I do wish there was a better operating manual for this unit. Maybe that is something you can work on.
I will give you an update once I start using it in a few days.
Great piece of equipment. Performs far better than I expected. One piece of advice - if property is significantly overgrown, consider the tractor attachment first to bring down the over growth and then switch to the UTV attachment to maintain property. No complaints worked perfectly.
When I think of ripping it outdoors something else comes to mind, but I digress. This spreader is awesome. Works like a champ. The hopper is big enough to do my 1 acre lot for my applications. Just load once and go. I would highly recommend this spreader. It saves a ton of time and is a quality product.
Put this on Kubota 900 with winch hookup. This thing is a beast (within reason). I named it ‘Homie”, cause Homie don’t play. It will take care of stuff up to about 2” in diameter. You still have to remember that this is NOT like the ones on a bobcat or larger machinery. It does have its limits. But all in all I am very satisfied with it. Now on to the good part! The staff at Ripping It are outstanding! Especially Kayla in the office. She has gone above and beyond on making sure everything went right, from ordering to questions about installation. This young lady would be of great value at ANY company ! Her knowledge and personality are like over the top. This is my first experience with Ripping It Outdoors and I can only say positive things about them. With all that being said, I do fill out reviews on things I buy, AND I give a honest review. If it’s bad then you will know it. But if it’s good, well I tell the truth ! Again Kayla, from the bottom of my heart, a great big THANK YOU for all your help and just talking to you. I feel like we’ve know each other for years!
TENT is easy to put up , material is tuff as told....only complaint is that i wish the bottom had about 3 to 4 inches overlap towards the inside so i could install a 2 x4 or something to help hold the tent down in high winds we have here in virginia thanks
Hi, my name is Ken. I’ve had a great experience with Ripping It Outdoors. I purchased a Forax Hp40 Mulcher for my mini excavator. Kayla Patterson is who I dealt with from the beginning until I received it at my house. She has been wonderful to work with and looking forward to working with her with any other orders I purchase. Kayla answered any questions I had and kept me updated throughout the whole process, can’t say it enough just a wonderful person to work with!!