Specifications
| Frame Width (m) | 3.6, 4,6, 5.5, 6.4 or 7.6 |
| Frame Depth – Toolbar | 3.1m (123″) |
| Frame Depth – Overall | 7.1m |
| Standard Shank | 660mm (26″) |
| Frame Height | TBC |
| Frame Weight (kg) | TBC |
Frame – Manufactured in Australia from 4″ x 4″ 3/8 RHS
Hitch – The Yeomans Trailing Model plows are fitted with a heavy‑duty hydraulically adjustable Top Link incorporated into the solid steel A‑frame tow bar assembly. This system allows precise hydraulic levelling of the plow frame from the tractor cab, ensuring the plow operates dead level at the selected working depth regardless of terrain or drawbar height variation.
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 T123SJ trailing plow is fitted with heavy duty 7.50 x 16 (8 Ply) tyres on 5 stud Jeep rims and axles.
| Plow Models | T123SJ-12 | T123SJ-15 | T123SJ-18 | T123SJ-21 | T123SJ-25 | ||
| Shank Spacing | Number of Shanks (for equal spacing) | ||||||
| 330mm (13″) | 11 | 13 | 15 | 19 | 23 | ||
| 457mm (18″) | 7 | 9 | 11 | 13 | 17 | ||
| 482mm (19″) | – | 9 | 11 | 13 | – | ||
| 500mm | 7 | 9 | 11 | 13 | 15 | ||
| 508mm (20″) | 7 | 9 | 11 | 13 | 15 | ||
| 635mm (25″) | 5 | 7 | 9 | 9 | 11 | ||
| 660mm (26″) | 5 | 7 | – | 9 | 11 | ||
| 685mm (27″) | 5 | 7 | – | – | – | ||
| 711mm (28″) | 5 | – | – | – | – | ||
| 736mm (29″) | 5 | – | – | – | – | ||
| 787mm (31″) | 5 | – | – | – | – | ||
| 813mm (32″) | 5 | – | – | – | – | ||
| 838mm (33″) | – | 5 | 7 | – | – | ||
| 914mm (36″) | – | 5 | 5 | – | – | ||
| 940mm (37″) | – | 5 | 5 | – | – | ||
| 965mm (38″) | – | 5 | 5 | 7 | 7 | ||
| 990mm (39″) | – | – | – | 7 | 7 | ||
| 1016mm (40″) | – | 5 | 5 | 7 | 7 | ||
The Yeomans T123SJ trailing plows feature a three beam configuration with shanks positioned along all three beams. Due to front‑to‑rear support beam(s) shanks can only be set at certain equal spacings. These are shown on the table to the left.
*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
- 31″ or Big Y (Adjustable up to 34″) Shanks
- 18″ Fluted Disc Pasture Coulters
- Depth Control Wheels – Hydraulic
- Shakaerator
- Crumble Roller – Manual or Hydraulic
- Tickle Pot Seeder
- Weed Knife – Heel
- Weed Knife – Wobble Blade
- Adjustable Hillers
- Fixed Hillers
- Disc Hillers
- Digging Points
Constructed from fully welded 4″ × 4″ × ⅜” RHS steel, the T123SJ frame is engineered for sustained operation under high load. The three‑beam layout delivers increased rigidity while maintaining accurate shank alignment, helping the plow remain stable and predictable when working challenging country. Shanks are clamp‑mounted rather than welded, allowing flexible spacing and configuration while maintaining structural integrity.
The generous beam spacing also allows depth control wheels to be positioned in a wide range of locations along the frame, supporting consistent depth control and balance when operating across uneven ground or at varying working depths.
For improved surface protection and finish, the T123SJ can be fitted with optional castoring coulter discs for pasture renovation and Yeomans Crumble Rollers, available in manual or hydraulic configurations. These attachments assist with residue management, pasture preservation, and uniform finishing following deep cultivation.
Designed and manufactured in Toowoomba, the T123SJ Trailing Plow represents over 75 years of Yeomans Keyline plow engineering, delivering a powerful, purpose‑built solution for improving soil structure, increasing water infiltration, and enabling productive cultivation in the most demanding ground conditions.
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.
