Manual Adjustable Box Grader CJ Series | Roadrunner Equipment

📘 Overview

This Roadrunner skid steer box blade is the manual-adjust member of the C-Series (CJ Series): a dual-blade box grader with T-handle screw adjusters on each side instead of hydraulic cylinders, so it runs on any skid steer, compact track loader or tractor without tying up an auxiliary hydraulic circuit. The serrated front blade cuts and breaks material, the smooth rear blade carries and finishes it, and the side panels hold the load inside the box so it fills low spots instead of spilling into windrows — which is why it is bought for gravel driveways, ranch lanes and site pads rather than one-pass rough dozing. You choose two things: blade width (72", 84" or 96"), and the mount — Universal Skid Steer Quick Attach, a Category 1 & 2 three-point hitch for a tractor, or the Combo that ships with both so one grader covers the loader and the tractor. Go wider than your machine: the 96" blade measures 100" overall and needs a machine with the traction to pull a loaded box, while the 72" suits compact loaders and smaller tractors. Every Roadrunner grader is welded and finished in Lancaster County, Pennsylvania and carries a 36-month warranty.

⚙ Inside the Roadrunner Skid Steer Box Blade (CJ Series)

• Manual T-handle depth adjustment — twin screw adjusters set blade depth without hydraulics, so nothing is plumbed into the machine and there is no cylinder or hose to service.
• Independent adjustment on each side — setting one side lower than the other lets you cut a crown so rainwater sheds off both shoulders instead of pooling into potholes.
• Dual blade configuration — a serrated front cutting blade breaks hard-packed gravel, a smooth rear cutting blade levels behind it in the same pass.
• Bolt-on motor grader cutting edges — standard 5/8" bolt-on edges retained with plow bolts, so a worn edge is unbolted and replaced rather than the whole blade being scrapped.
• Replaceable AR400 wear shoes — hardened skid bars carry the box and set the cut height; they are the sacrificial part, bolted on with 3/4"-10 hardware.
• Heavy-duty square tube frame — built from thicker high-strength steel than imported box blades, then two-stage zinc primed and powder coated instead of spray painted.
• Full side panels — retain material inside the grading area so loose stone is carried into low spots rather than pushed out to the edges as windrows.
• 6" blade height, 10-degree blade angle — Roadrunner's published geometry across the C-Series and E-Series.

🔑 Why Buyers Choose the Manual CJ Over a Hydraulic Grader

• No auxiliary hydraulics required — the CJ Series runs on machines with no auxiliary circuit at all, and on tractors where a rear remote would otherwise be needed. That is the whole reason it exists alongside the hydraulic CH Series.
• One grader for the loader and the tractor — the Combo mount option ships the Universal Skid Steer Quick Attach plate and the Category 1 & 2 three-point tower together, so a farm running both machines does not buy two implements.
• Fewer wear points than a hydraulic box — no cylinder, hoses, couplers or depth gauge means nothing to leak, and the only routine service is greasing the adjustment threads.
• Crown restoration on a gravel road — independent side adjustment rebuilds the crown that traffic flattens, which is what stops water standing and re-cutting potholes every spring.
• Wear parts are bolt-on, not welded — cutting edges and AR400 skid bars are consumables you replace with hand tools; the frame is the part you keep.

📊 Roadrunner CJ Series Box Grader Specifications

🔄 CJ Series Sizes Side by Side

Overall width runs 4" wider than the nominal blade width on every size, because the side panels sit outboard of the cutting edges.

📋 Choosing Your CJ Series Configuration

Two choices build this box blade attachment — the blade width above, and the mount below.

🔗 What Bolts On to a Roadrunner C-Series Grader

The Category 1 & 2 three-point kit is a genuine Roadrunner accessory that bolts to any C-Series grader — a three-point tower weldment plus side mounting plates whose spacing is set to suit your tractor's lower arms during installation. It is fitted, not welded, so a CJ Series bought today as a skid steer grader can be converted into a tractor grader attachment later. Adjust the top link on installation so the grader sits parallel to the ground in the grading position, and pin the lower arms before the top link.

🚜 Which Machines Fit This Skid Steer Box Blade?

This grader is offered in two mounting configurations — select the one that matches your machine:

Universal Skid Steer Quick Attach (SSQA) — fits skid steer loaders and compact track loaders with a standard universal quick attach coupler, including:

Category 1 & 2 three-point hitch — fits compact and utility tractors with a Category 1 or Category 2 three-point hitch. No PTO is required; the CJ Series is a fully mechanical implement.

Roadrunner rates the C-Series grader for machines up to 110 HP or a 3,000 lb lift capacity and specifies that the carrier must have ROPS and a seat belt. Do not use an oversized machine — the owner's manual is explicit that a machine above that rating can damage the grader. Size the blade to the carrier as well as to the job: a common sizing rule among grader dealers is to pick an overall width at least 12" greater than the machine's tire or track width, so the machine always drives on ground the grader has already finished. Confirm your quick attach configuration, or your hitch category, before ordering. Everything needed to confirm fitment is on this page — add the grader to your cart to see delivered pricing for your address.

❓ CJ Series Box Grader Questions, Answered