THE ACREAGE EQUIPMENT FIELD GUIDE
Gearbox horsepower vs. tractor horsepower requirements
A gearbox rating and a tractor power range are separate entries, even when both use horsepower. Farmry LFP47 lists a 30 hp gearbox alongside a 25–45 hp tractor range whose engine/PTO basis is unstated. Keep both labels and their unresolved meaning in the inquiry. Combining them into a new tractor range would create a specification the manufacturer has not published.
By Acreage Equipment · Reviewed November 7, 2026 · Specification research, not a field test
THE DECISION IN NUMBERS
Worked power-label examples: keep each requirement attached to its subject
Hypothetical tractor values; no actual pairing is approved. LFP47 publishes 25–45 HP without a resolved engine/PTO basis and a separate 30 HP gearbox label. TFMS manual explicitly gives a 50 PTO-hp tractor maximum. Arithmetic identifies an issue to resolve; it does not reinterpret the component rating.
Scroll the table sideways on smaller screens.
| Product / hypothetical tractor | Range arithmetic | Other stated information | Next conclusion |
|---|---|---|---|
| LFP47: 24 engine / 18 PTO hp | Both outputs below 25 | 30 HP is a gearbox entry | Below either candidate tractor minimum |
| LFP47: 40 engine / 33 PTO hp | Both outputs inside 25–45 | Separate gearbox entry is 30 HP | Resolve allowable component input; no fit approval |
| LFP47: 50 engine / 42 PTO hp | Engine exceeds 45; PTO is inside | Gearbox label does not define range basis | Resolve engine-versus-PTO requirement |
| TFMS50: 60 engine / 52 PTO hp | Both outputs inside generic 30–60 | Manual maximum 50 PTO hp | PTO output exceeds explicit ceiling by 2 |
Copy the label along with the number
LFP47’s manual places 30 hp beside a gearbox symbol and 25–45 hp beside a tractor symbol; its product page explicitly names those rows Gearbox HP and Tractor Power Range. The 30 is not labeled as the tractor’s minimum, nor is the tractor range identified as engine or PTO output. Preserve that separation before comparing your tractor’s ratings.
Use the range for preliminary arithmetic, then resolve the basis
For a hypothetical 24 engine/18 PTO-hp tractor, both candidate outputs are below the 25 hp lower bound. For 40 engine/33 PTO hp, both fall inside 25–45, but the separate 30 hp gearbox label still needs explanation. For 50 engine/42 PTO hp, the engine figure is above 45 while PTO is inside. These cases show which question remains; they do not establish that any of these tractors can drive the mower.
Ask how the component rating constrains the complete machine
Have Farmry identify the range’s power basis and explain the allowable input and operating conditions associated with the gearbox rating on the delivered LFP47. A 33 PTO-hp value beside a 30 hp gearbox label is a reason to seek that explanation, not a basis for inventing a new allowable range or dismissing the component figure. Do not calculate a supposed engine-to-PTO conversion from 30 and 45; the two labels do not supply that relationship.
An explicit tractor maximum is a different kind of evidence
TMG’s TFMS manual expressly limits tractor output to 50 PTO hp. Its product table separately gives a 30–60 hp range without a clear power basis. A hypothetical 60 engine/52 PTO-hp tractor lies within that broad numerical range under either interpretation but exceeds the explicit 50 PTO ceiling by 2. The component-label ambiguity in another mower does not erase a clearly stated tractor restriction here.
Close the power question before comparing convenience
Request a written statement covering minimum and maximum tractor power, the rating basis, exact mower/blade configuration and relevant driveline requirements. Retain each additional component restriction the maker identifies. A power screen remains one step alongside implement limits, working load, hitch geometry and setup; a large gearbox number cannot establish cutting pace or a bigger approved tractor.
Take these questions with you.
- Does the published tractor range use gross engine, net engine or PTO horsepower for this exact mower configuration?
- What allowable input and operating conditions does the gearbox-horsepower entry specify?
- Which explicit tractor minimum/maximum and additional component limits should appear in the order confirmation?
Keep these questions with your exact tractor and attachment details.
Use these questions in my seller briefFOLLOW THE NUMBERS
Sources & documentation
Research record reviewed November 7, 2026. Confirm the current manual and the exact revision supplied with your machine.
