Specifications
| Frame Width (mm) | 1970 / 2480 / 2950 / 3430 |
| Frame Depth – Toolbar | 762mm (30″) |
| Frame Depth – Overall | 813mm (32″) |
| Frame Height | 610mm (24″) |
| Frame Weight (kg) | 180 / 201 / 222 / 230 |
Frame – Manufactured in Australia from 4″ x 4″ 3/8 RHS
Hitch – Fully welded hitch plates engineered to suit category 1 and 2.
Depth Control – Award winning “Ripple Clamp” system gives 25mm (1″) incremental height adjustment and capable of variable positioning internally or externally of the frame. The GP39 is fitted with 185R14C (8 Ply) tyres on HT holden wheels and hubs.
| Plow Models | SB-6 | SB-8 | SB-10* | SB-11* |
| Shank Spacing | Number of Shanks | |||
| 355mm (14″) | – | 4 | 8 | 9 |
| 406mm (16″) | – | 4 | 7 | 8 |
| 457mm (18″) | – | 4 | 6 | 7 |
| 559mm (22″) | – | 4 | 5 | 6 |
| 813mm (32″) | 3 | 3 | 3 | 4 |
*As the frame has no front to back support beams, equal shank spacings will be easy to achieve and will depend on your application and hitch.
In pasture work, minor variations in shank spacing caused by frame beam positions are inconsequential, whereas cropping applications require more precise, even spacings to align with defined crop rows.
Available Optional Extras
- 26″ / 31 / Big Y Shanks
- 16″ Fluted Disc Pasture Coulters
- 18″ Fluted Disc Pasture Coulters
- Depth Control Wheels – Manual
- Crumble Roller
- Tickle Pot Seeder
- Weed Knife – Heel
- Weed Knife – Wobble Blade
- Adjustable Hillers
- Fixed Hillers
- Disc Hillers
- Digging Points
The award winning Yeomans Ripple Bar depth control system can be mounted on rear pointing extension posts, transferring weight control back to the tractor and allowing a constant digging depth to be maintained.
The fully welded three point linkage hitch suits Categories I and II, with other categories available upon request. The frame suits a 12 inch or 305 mm shank spacing. As shanks are clamped to the frame rather than welded, multiple shank spacings are possible.
The R56 Raspberry Plow can be fitted with the full range of Yeomans rigid shank assemblies including 22 inch, 26 inch, 31 inch, or Big Y.
The fully welded frame is manufactured in our Toowoomba factory from 4 inch by 4 inch by 3/8 inch or 102 by 102 by 9.5 mm RHS, resulting in high strength equipment with 75 years of proven reliability in the field.
The Yeomans R56 Raspberry Plow frame can be fitted with an optional castoring coulter disc, ideal for pasture renovation to prevent tearing of the ground surface covering. Coulters are attached and removed using a single L bolt and are available in 16 inch, or 18 inch configurations. All coulter units are adjustable to maintain optimal distance between the coulter disc and the digging point.
Yeomans crumble rollers are available as an optional extra. They are a robust 26 inch diameter angle iron construction and provide a superior level of finish to worked ground or pasture, with units available with either hydraulic ram or manual adjustment.
When selecting a Yeomans plow, drawbar horsepower and tractor weight are more important than engine horsepower alone.
A tractor may have sufficient horsepower on paper, but without adequate weight and traction it cannot apply that power effectively. This is especially true for compact utility tractors. For this reason, Yeomans plow selection should be based on usable drawbar horsepower.
How Many Shanks Should I Run?
Depending on soil type, compaction and tractor models, we recommend anywhere from 7-15HP per shank.
Up to 20–30 horsepower per shank may be required for initial cultivation in very compacted or dry hardpan soils. In such situations it is best to order a plow based on the standard recommendation, but start plowing with fewer shanks and re-introduce shanks as soil conditions improve.
With the above in mind, a practical starting point is to allow approximately 10 drawbar horsepower per shank.
Want to learn more on how to select the right plow?Click here
Minimal Soil Disturbance Design
75 years of Keyline expertise, design and testing has produced the best shank and point geometry to lift and fracture compacted subsoil without inverting or mixing the topsoil.
This controlled soil‑lifting action is achieved through carefully developed shank profiles and working angles that loosen the soil profile while preserving surface structure, residue, and ground cover. The result is a precise, mechanical approach to subsoil conditioning rather than aggressive cultivation.
Advanced Shear Pin System
The shear pin acts as a sacrificial mechanical safeguard, absorbing sudden shock loads by failing under excessive force before damage can be transferred to shank, clamp and frame.
What sets the Yeomans system apart is the ingenious design which uses short pieces of off-the-shelf mid steel rod instead of expensive machined pins. Changing a Yeomans pin is quick, easy and cheap. When the shear pin breaks, the shank doesn’t fall to the ground, it remains on the frame meaning a pin change takes around 40 seconds. No spare pins? no problem, use an M8 bolt to get you working again until replacements arrive.
Interchangeable Yeomans Shank System
Built around the Yeomans Oyster Clamp Shank (OCS) system, plows support interchangeable 22″, 26″, and 31″ shanks with replaceable points and adapters.
Clamp‑mounted shanks allow fast reconfiguration, simplified servicing, and long‑term component replacement without cutting or welding. This modular system gives operators the flexibility to adapt one frame to multiple applications while protecting long‑term machinery investment.
Fully Customisable & Upgradeable Frame System
Yeomans plows are built around a highly adaptable frame system designed to accept a wide range of attachments and configurations. The frame allows coulters, crumble rollers (manual or hydraulic), depth control systems, seeders, weeders, and hilling components to be easily fitted, removed, or reconfigured to suit changing applications. Plows can be set up as a dedicated cultivator, seeder, weeder, or hiller, or configured to perform multiple tasks in a single pass.
Importantly, these options can be specified at the time of purchase or added at any stage in the future, allowing the machine to evolve over the years. This modular approach ensures long‑term flexibility, protects machinery investment, and allows Yeomans plows to be upgraded and adapted over many years of use.
Heavy‑Duty Australian‑Built Construction
All Yeomans plows feature fully welded RHS steel frames designed and manufactured in Australia for Australian conditions. Frame designs have evolved through decades of field use to withstand demanding soils, variable terrain, and long working hours.
This proven construction approach delivers strength, durability, and confidence that the plow is built to perform year after year.
