John Deere 4052M · FLAIL MOWERS
The standard 4052M brochure gives 41.2 PTO hp for hydro, while the book and older manual give an unqualified 39.9. Both fit the FM62 hammer’s 24–45 PTO-hp band, despite the tractor’s 51-hp engine label. Moving to FM2572 or FM2584 creates a different question: Land Pride does not identify whether its requirement means engine or PTO power.
By Acreage Equipment · Reviewed November 8, 2026 · Specification research, not a field test
PUT THIS GUIDE TO WORK
See published mismatches and the checks still needed.
BEST MATCHES FOR THE 4052M
18 of 23 flail mowers we track pass the published power, hitch and speed screen. Each still has a detail to confirm with the seller.
Flail mowerWoodMaxx
55″ cutting width, inches · 24–45 PTO hp · Hammer blades only
Resolve the conflicting published specifications for the exact model revision.
Flail mowerWoodMaxx
70″ cutting width, inches · 30–65 PTO hp · Hammer blades only
Resolve the conflicting published specifications for the exact model revision.
Flail mowerWoodMaxx
70″ cutting width, inches · 30–65 PTO hp · Hammer blades only
Confirm rear remotes, hydraulic flow and pressure requirements.
Flail mowerLand Pride
72″ cutting width · 42–80 tractor hp · engine/PTO basis unspecified
Ask the manufacturer whether the horsepower range means engine or PTO power.
Flail mowerLand Pride
84″ cutting width · 49–80 tractor hp · engine/PTO basis unspecified
Ask the manufacturer whether the horsepower range means engine or PTO power.
Flail mowerFarmry
87″ cutting width · 30–85 HP (basis not stated) · official page and manual
Ask the manufacturer whether the horsepower range means engine or PTO power.
12 more possible options in the full comparison table.
THE DECISION IN NUMBERS
41.2 is an explicit brochure hydro reference, not a verified current serial rating. The alternative 39.9 is not assigned to HST. Numeric screening does not settle hitch, load or mowing conditions.
Scroll the table sideways on smaller screens.
| Product / configuration | Published power requirement | Qualified tractor comparison | Decision still needed |
|---|---|---|---|
| FM62 hammer · 55-inch cut | 24–45 PTO hp | 41.2 is 3.8 below the maximum; 39.9 is also inside | A 51-hp engine label does not exceed a PTO-based maximum. Check fixed coverage and the page’s iMatch exclusion. |
| FM78 hammer · 70-inch cut | 30–65 PTO hp | 41.2 is 11.2 above minimum; 39.9 is also inside | 15 inches more cut than FM62; obtain complete load and a cutting-edge drawing. |
| FM78H hammer · 70-inch cut | 30–65 PTO hp; rear circuit required | Same power screen as fixed FM78 | Confirm installed rear valves and allowed circuit flow/pressure; availability is not installation. |
| FM2572 hammer · 72-inch cut | 42–80 tractor hp; basis unstated | 41.2 PTO is 0.8 below 42; 39.9 is 2.1 below; 51 engine is above | Do not substitute the brochure’s 42.2 gear figure for hydro. Obtain Land Pride’s power definition. |
| FM2584 hammer · 84-inch cut | 49–80 tractor hp; basis unstated | Both PTO references are below 49; 51 engine is above | The engine/PTO definition remains decisive even though the model name includes 52. |
FM62 hammer is a 55-inch mower with a 24–45 PTO-hp requirement. The selected 41.2 hydro reference and unqualified 39.9 alternative are both below its 45 maximum; the rounded 51 engine label is the wrong number for that comparison. This keeps a narrower mower available for a layout that favors it, subject to fit checks. The page’s generic 20–45 range includes the lower Y-blade minimum and must not replace the hammer requirement. Choose the delivered blade configuration explicitly; the maker does not authorize swapping hammer and Y equipment simply by purchasing another blade kit.
FM2572 starts at an unspecified 42 tractor hp. Deere’s brochure gives 42.2 for gear but 41.2 for hydro. Using the gear row would move the numerical result across 42, even before Land Pride defines its horsepower basis. For this hydro profile, both PTO references are below the minimum while the 51 engine label is above. FM2584’s 49 minimum creates the same unresolved basis decision. Obtain a requirement for the exact hammer configuration and intended material; Land Pride’s manual ties minimum power to terrain, material load, moisture and speed.
The relevant cuts are 55 inches for FM62, 70 for FM78 and 72 for FM2572. Model numbers and overall deck widths cannot establish coverage beyond the tractor tires. Ask for a drawing tied to the actual wheel spacing and mower mounting position. Deere advertises iMatch compatibility on the tractor, but the fixed WoodMaxx pages exclude John Deere iMatch in their quick-hitch wording. Confirm the intended standard-link or quick-hitch arrangement before ordering a shaft. The older tractor manual’s Limited Category 1 label also remains unresolved; neither Category 1 nor a larger tractor frame settles lift travel and clearance.
FM78H adds hydraulic side shift to the 70-inch cut; fixed FM78 and the FM25 mounting positions do not require a shift cylinder. The 4052M’s advertised remote availability and 15.9-gpm total pump figure do not establish the circuit the mower needs. Deere’s kit paths depend on loader and build details. Obtain an itemized circuit and mower quote, including the complete hammer assembly, shaft and fluids. The FM78 manual’s 880-lb product figure has unspecified inclusions and differs from page weight bases. Deere’s 2,500 lb at 24 inches cannot replace a load-center and ballast assessment. FM25’s 1.5-versus-2-inch hammer capacity conflict also remains open.
Farmry rates the HFS87 at 30–85 hp without saying whether that is PTO or engine power, lists Category I and II, cuts 87 inches and weighs 1,299 lb with the shaft. The John Deere 4052M’s 41.2 PTO hp and 51 engine hp are both inside that range, so the basis does not change the result. Its published lift at 24 inches, 2,500 lb, carries that weight with 1,201 lb to spare; check front ballast all the same. Its gearbox rating, 50 hp, is not below this tractor’s PTO power. The 87-inch cut is 3 inches wider than Land Pride’s FM2584. Farmry’s page listed it at $4,499 on November 14, 2026.
Farmer-Helper rates its standard-duty FH-EF mowers by PTO power, all to 45 PTO hp with a 45-hp gearbox: the EF95 (37-inch cut) from 15, the EF105 (41-inch) from 16 and the EF125 (48-inch) from 20. They carry Y-blades for grass and light brush. The John Deere 4052M’s 41.2 PTO hp is inside all three. Its published lift at 24 inches, 2,500 lb, carries even the 390-lb EF125 with 2,110 lb to spare. This tractor has the power for heavier mowers; the FH-EF line suits grass and light growth, not thick brush. Betstco listed them at $1,462, $1,547 and $1,632 on November 14, 2026, with the PTO shaft included.
THE SCREEN, WITH ITS LIMITS VISIBLE
No pairing below is manufacturer-confirmed. “Preliminary” still requires implement limits, load center, ballast, hitch geometry and shaft checks.
Initial specification screen only. Scroll the table on small screens. Read the product page for every remaining check.
| Attachment | U.S.-linked brochure HST scope · 035BLV / eHydro 1520 reference · standard 4M · 4WD · open station41.2 PTO hp |
|---|---|
| Farmry LFS45 →355 lb · Net weight WITH PTO shaft, current LFS manual Rev 1.7 p18 | Published mismatchBoth engine (51) and PTO (41.2) horsepower exceed the published 35 hp maximum. |
| Farmry LFS53 →395 lb · Net weight WITH PTO shaft, current LFS manual Rev 1.7 p18 | Published mismatchBoth engine (51) and PTO (41.2) horsepower exceed the published 35 hp maximum. |
| Farmry LFS61 →421 lb · Net weight WITH PTO shaft, current LFS manual Rev 1.7 p18 | Published mismatchBoth engine (51) and PTO (41.2) horsepower exceed the published 35 hp maximum. |
| TMG Industrial TMG-TFM60 →650 lb · Product-page operation weight; manual gives conflicting 270 kg (about 595 lb) | Needs specification reviewAsk the manufacturer whether the horsepower range means engine or PTO power. |
| Farmry LFP47 →464 lb · 464 lb including PTO shaft on the product page; current Rev 1.3 manual lists 210 kg / 463.7 lb. Shipping weight is a separate 671 lb. | Needs specification reviewAsk the manufacturer whether the horsepower range means engine or PTO power. |
| TMG Industrial TFMS50 →660 lb · Product-page operation weight: 660 lb. Manual structure weight: 300 kg (about 661 lb); shaft and fluid inclusion are not explicit. Shipping weight: 770 lb. | Needs specification reviewAsk the manufacturer whether the horsepower range means engine or PTO power. |
| WoodMaxx FM-54 · Y-blades →408 lb · Current 2025-and-newer manual p40 lists 408 lb product weight without stating shaft inclusion. Page instead says 410 lb mower-only plus a 39 lb shaft. Do not treat 408 lb as a verified complete operating assembly; confirm delivered Y-blade weight. Shipping page figure is 500 lb. | Published mismatch41.2 PTO hp exceeds the published 25 hp range. |
| WoodMaxx FM-62H · Hammer blades →860 lb · Current 2025-and-newer manual, printed p40 / PDF p41: 860 lb product weight; shaft/oil/packaging inclusion is unstated. Page instead lists 716 lb mower-only plus a 39 lb shaft. Shipping is separately labeled 860 lb. Do not treat the manual number as verified complete operating weight; confirm delivered hammer assembly. | Needs specification reviewConfirm rear remotes, hydraulic flow and pressure requirements. |
| WoodMaxx FM-78H · Hammer blades →968 lb · Current 2025-and-newer manual, printed p40 / PDF p41: 968 lb product weight; shaft/oil/packaging inclusion is unstated. Page instead lists 804 lb mower-only plus a 39 lb shaft. Shipping is separately labeled 1000 lb. Do not treat the manual number as verified complete operating weight; confirm delivered hammer assembly. | Needs specification reviewConfirm rear remotes, hydraulic flow and pressure requirements. |
| WoodMaxx FM-62 · Hammer blades →774 lb · Current 2025-and-newer manual printed p40 / PDF p41 lists 774 lb product weight without shaft/oil/packaging inclusion. Page lists 641 lb mower-only plus a 39 lb shaft; shipping is separately labeled 800 lb. Retain these distinct bases and confirm complete operating weight for the delivered hammer assembly. | Needs specification reviewResolve the conflicting published specifications for the exact model revision. |
| WoodMaxx FM-78 · Hammer blades →880 lb · Current 2025-and-newer manual printed p40 / PDF p41 lists 880 lb product weight without shaft/oil/packaging inclusion. Page lists 710 lb mower-only plus a 39 lb shaft; shipping is separately labeled 900 lb. Retain these distinct bases and confirm complete operating weight for the delivered hammer assembly. | Needs specification reviewResolve the conflicting published specifications for the exact model revision. |
| Farmer-Helper FH-EFGC125 · Hammer blades →Operating weight unconfirmed · Complete operating weight is unverified. Current page: 576 lb “Weight” and 624 lb “Crated Weight.” Linked Rev 12-12-17 manual p23: 600 lb “Weight” and 635 lb crated. Product-weight shaft/oil/assembly inclusions are unstated. Keep these separate; do not use crate weight or silently choose one product figure as an operating load. | Needs specification reviewConfirm the complete operating weight; a shipping weight cannot establish the attachment load. |
| Farmer-Helper FH-EFGC155 · Hammer blades →Operating weight unconfirmed · Complete operating weight is unverified. Current page: 741 lb “Weight” and 789 lb “Crated Weight.” Linked Rev 12-12-17 manual p23: 720 lb “Weight” and 755 lb crated. Product-weight shaft/oil/assembly inclusions are unstated. Keep these separate; do not use crate weight or silently choose one product figure as an operating load. | Needs specification reviewConfirm the complete operating weight; a shipping weight cannot establish the attachment load. |
| WoodMaxx FM-62 · Y-blades →Operating weight unconfirmed · Complete Y-configuration operating weight is unverified. Current manual p40 gives 774 lb generic product weight without shaft/oil or blade-specific inclusion. Page gives 641 lb mower-only plus 39 lb shaft and separately 800 lb shipping. These bases conflict or lack scope; none substitutes for an assembled Y operating load. | Needs specification reviewConfirm the complete operating weight; a shipping weight cannot establish the attachment load. |
| WoodMaxx FM-78 · Y-blades →Operating weight unconfirmed · Complete Y-configuration operating weight is unverified. Current manual p40 gives 880 lb generic product weight without shaft/oil or blade-specific inclusion. Page gives 710 lb mower-only plus 39 lb shaft and separately 900 lb shipping. These bases conflict or lack scope; none substitutes for an assembled Y operating load. | Needs specification reviewConfirm the complete operating weight; a shipping weight cannot establish the attachment load. |
| Land Pride FM2560 · hammer rotor →Operating weight unconfirmed · Manual p39 specifies 965 lb for the standard unit with a duckfoot rotor; the brochure lists 929 lb without a rotor/inclusion basis. The separate hammer-rotor assembly is 222 lb. No complete hammer operating mass or shipping mass is established. Do not add the rotor to an already rotor-inclusive unit weight or substitute these references for the operating load. | Needs specification reviewAsk the manufacturer whether the horsepower range means engine or PTO power. |
| Land Pride FM2572 · hammer rotor →Operating weight unconfirmed · Manual p39 specifies 1,040 lb for the standard unit with a duckfoot rotor; the brochure lists 1,040 lb without a rotor/inclusion basis. The separate hammer-rotor assembly is 261 lb. No complete hammer operating mass or shipping mass is established. Do not add the rotor to an already rotor-inclusive unit weight or substitute these references for the operating load. | Needs specification reviewAsk the manufacturer whether the horsepower range means engine or PTO power. |
| Land Pride FM2584 · hammer rotor →Operating weight unconfirmed · Manual p39 specifies 1,236 lb for the standard unit with a duckfoot rotor; the brochure lists 1,168 lb without a rotor/inclusion basis. The separate hammer-rotor assembly is 301 lb. No complete hammer operating mass or shipping mass is established. Do not add the rotor to an already rotor-inclusive unit weight or substitute these references for the operating load. | Needs specification reviewAsk the manufacturer whether the horsepower range means engine or PTO power. |
| Blue Diamond Heavy Duty 403740 →1763 lb · 1,763 lb (800 kg) in the Aug-2025 spec sheet (without PTO) and the Feb-2026 manual p49. Add the PTO shaft for the operating load. | Published mismatchBoth engine (51) and PTO (41.2) horsepower are below the published 75 hp minimum. |
| Farmry HFS87 →1299 lb · 1,299 lb (589 kg) including PTO shaft on the product page and in the HFS manual Rev 1.6, printed p17. | Needs specification reviewAsk the manufacturer whether the horsepower range means engine or PTO power. |
| Farmer-Helper FH-EF95 →330 lb · 330 lb retained, the heavier of the product page (325 lb) and the FH-EF manual p13 (330 lb); crated 360 lb. Neither says whether the included PTO shaft is counted. | Needs specification reviewConfirm the conflicting tractor specifications in your serial-specific manual; official source values differ. |
| Farmer-Helper FH-EF105 →347 lb · 347 lb retained, the heavier of the product page (342 lb) and the FH-EF manual p13 (347 lb); crated 377 lb. Neither says whether the included PTO shaft is counted. | Needs specification reviewConfirm the conflicting tractor specifications in your serial-specific manual; official source values differ. |
| Farmer-Helper FH-EF125 →390 lb · 390 lb retained, the heavier of the product page (390 lb) and the FH-EF manual p13 (383 lb); crated 438 lb. Neither says whether the included PTO shaft is counted. | Needs specification reviewConfirm the conflicting tractor specifications in your serial-specific manual; official source values differ. |
Which fixed hammer flail makes sense: the 55-inch FM-62 or 70-inch FM-78?
Read the guide →FIELD GUIDETake the complete setup, not just a horsepower number, to the manufacturer.
Read the guide →FOLLOW THE NUMBERS
Research record reviewed November 8, 2026. Confirm the current manual and the exact revision supplied with your machine.