Gar-Bro 704-R Standard Rocker Dump Concrete Cart — 4 Cu. Ft. Capacity with 400x18 Implement Tires
The Gar-Bro 704-R is a professional-grade rocker dump concrete cart engineered for contractors who need reliable, high-cycle concrete transport on job sites. Rated at 4 cubic feet capacity, this cart features a rocker dump mechanism that allows for controlled, one-handed tipping and discharge without lifting. Built to Gar-Bro's exacting standards — American engineered and American made since 1923 — the 704-R is designed for the demands of daily commercial and residential concrete work. It is ideal for flatwork, foundations, curbing, and any application where a concrete buggy must navigate jobsite terrain efficiently.
Unlike standard fixed-body carts, the rocker dump design of the 704-R gives the operator precise control over discharge angle and timing, reducing spillage and fatigue over the course of a long pour. The 4.00 x 18 4-ply tubed implement tires provide a wider footprint and superior load-bearing stability compared to smaller-diameter pneumatic tires, and optional steel wheels are available for abrasive or hard-surface environments.
Key Features & Benefits
Rocker Dump Mechanism
The rocker dump design allows the operator to tip and discharge the concrete load smoothly without lifting the body — reducing operator fatigue during high-volume pours. This controlled dump action minimizes spillage and improves placement accuracy compared to fixed-body wheelbarrow-style carts.
4.00 x 18 4-PLY Tubed Implement Tires (Standard)
The large-diameter 4.00 x 18 tubed implement tires distribute load weight across a wider contact area, improving stability on soft, uneven, or freshly graded surfaces. The 4-ply rating ensures durability under repeated heavy loads without premature sidewall failure or blowouts.
Optional Steel Wheel Configurations (26" or 30" Diameter)
For job sites where pneumatic tires are impractical — such as heavily reinforced slabs or abrasive concrete surfaces — optional 26-inch or 30-inch diameter steel wheels are available. Steel wheels eliminate the risk of puncture and are well-suited for high-cycle indoor or industrial pours.
Optional Lifting Lugs
The 704-R can be equipped with optional lifting lugs, allowing the cart to be hoisted by crane or telehandler to elevated work areas or across obstacles. This accessory expands the cart's versatility on multi-level or complex jobsite layouts.
Compact, Jobsite-Ready Dimensions
With a 27-inch extreme width and 61-inch overall length, the 704-R is sized to navigate standard concrete chute staging areas and doorway openings common on residential and light commercial projects. The 32-inch loading height is compatible with standard mixer chutes, reducing concrete drop and segregation during loading.
Durable, Purpose-Built Construction
At 160 pounds, the 704-R is built with the structural integrity required for repeat daily use in demanding construction environments. Gar-Bro has manufactured concrete handling equipment since 1923, and the 704-R reflects decades of refinement in cart geometry, wheel placement, and body design for professional trades use.
Common Applications
Flatwork and Slab Pours
Transport and deposit concrete efficiently across large slab areas where a ready-mix truck cannot reach the full pour zone. The rocker dump allows precise placement without overpouring.
Foundation and Footing Fills
Move concrete from mixer or chute staging areas directly to form edges and footing trenches. The 32-inch loading height matches standard truck chute discharge for efficient transfer.
Curbing and Flatwork Edging
Deliver measured loads of concrete to curb forms or edge sections where controlled, low-spillage discharge is critical to maintaining form alignment and concrete consistency.
Elevated or Multi-Level Placement (with Lifting Lugs)
When equipped with the optional lifting lugs, the 704-R can be positioned at elevated decks or work areas via crane or telehandler, extending its utility beyond ground-level applications.
Residential and Light Commercial Construction
The cart's compact width and moderate capacity make it well-suited for residential driveways, garage slabs, sidewalks, and small commercial flatwork pours where larger equipment is impractical.
Industrial and Foundry Applications
The optional steel wheel configuration makes the 704-R adaptable for industrial environments where pneumatic tires are subject to puncture or rapid wear from abrasive floor surfaces.
Compatible Materials
- Standard ready-mix concrete
- High-slump concrete mixes
- Grout and mortar
- Flowable fill
- Fiber-reinforced concrete
- Lightweight aggregate concrete mixes
Product Documents
- 704-R Specifications and Dimensions PDF
- 706-R Specifications and Dimensions PDF
- 708-R Specifications and Dimensions PDF
- Parts List PDF
- Gar-Bro Product Catalog (English)
- Gar-Bro Product Catalog (Español)
Technical Specifications
| Specification | Details |
|---|---|
| Item Number | 704-R |
| Capacity | 4 Cu. Ft. |
| Extreme Width | 27 Inches |
| Length | 61 Inches |
| Wheel Tread | 21 Inches |
| Loading Height | 32 Inches |
| Width Body | 12 Inches |
| Weight | 160 Pounds |
| Tire Size (Standard) | 4.00 x 18 4-PLY Tubed Implement Tires |
| Optional Steel Wheels | 26" Diameter or 30" Diameter |
| Optional Accessory | Lifting Lugs |
| Dump Type | Rocker Dump |
| Manufacturer | Gar-Bro Manufacturing Co. |
| Country of Manufacture | USA (American Engineered and Made) |
Frequently Asked Questions
Q: What is the difference between the 704-R rocker dump and a standard fixed-body concrete cart?
A: The 704-R features a rocker dump body that pivots to discharge the load without the operator having to lift or tip the entire cart manually. This reduces physical strain during high-cycle pours and provides more controlled concrete placement compared to a fixed-body wheelbarrow design.
Q: Are the 4.00 x 18 tires tubeless or tubed?
A: The standard 4.00 x 18 4-PLY implement tires on the 704-R are tubed tires. They are not tubeless. For environments where tire puncture is a concern, the optional 26" or 30" diameter steel wheels are recommended.
Q: Can the 704-R be lifted by a crane or telehandler to upper floors?
A: Yes, when equipped with the optional lifting lugs accessory, the 704-R can be hoisted to elevated work areas. Contact your dealer or Gar-Bro directly to order the lifting lug option.
Q: What other models are available in the Gar-Bro R-Series concrete cart lineup?
A: The R-Series concrete cart line includes the 704-R (4 Cu. Ft.), 706-R (6 Cu. Ft.), 708-R (8 Cu. Ft.), and SP708DUMPCART (8 Cu. Ft. specialty configuration). All models share the rocker dump design and are available with the same tire and wheel options.
Q: Where can I get replacement parts for the 704-R?
A: A complete parts list is available for download via the Parts List PDF linked in the Product Documents section above. For ordering, contact Gar-Bro Manufacturing Co. at 1-800-643-8192 or GARBROco@GARBRO.com, or contact Diamond Tool Store directly.
Q: Is the 704-R suitable for use with lightweight or fiber-reinforced concrete mixes?
A: Yes. The 704-R is compatible with standard ready-mix concrete, lightweight aggregate mixes, fiber-reinforced concrete, grout, mortar, and flowable fill, provided the total load weight remains within the cart's structural design parameters for the 4 Cu. Ft. capacity body.