PTO chipperWoodland Mills
WC68
6″ max. chip diameter · 20–50 PTO hp
Confirm the conflicting tractor specifications in your serial-specific manual; official source values differ.
Case IH · COMPACT TRACTOR ATTACHMENTS
The Case IH Farmall 40A has 40 engine hp and 1,596 lb of lift at 24 inches. Case IH’s August 2026 sheet rates it 35.9 PTO hp (mechanical) or 34.8 (HST), but the current 40A page still lists 34.0 and 32.0. On the mechanical tractor that difference decides Woodland Mills WC88’s 35-PTO-hp minimum.
By Acreage Equipment · Reviewed November 9, 2026 · Specification research, not a field test

PTO WOOD CHIPPERS FOR THE FARMALL 40A
12 of 19 pto wood chippers we track pass the published power, hitch and speed screen on at least one configuration. Each still has a detail to confirm with the seller.
PTO chipperWoodland Mills
6″ max. chip diameter · 20–50 PTO hp
Confirm the conflicting tractor specifications in your serial-specific manual; official source values differ.
PTO chipperWoodland Mills
8″ maximum branch diameter, inches · 35–100+ PTO hp
34.8 PTO hp is below the 35 hp minimum.
PTO chipperFarmry
5″ max. chip diameter · 15–45 engine hp
Confirm the conflicting tractor specifications in your serial-specific manual; official source values differ.
PTO chipperWoodMaxx
9″ maximum chip diameter, inches · 25 PTO hp minimum; maximum not stated
Confirm the complete operating weight; a shipping weight cannot establish the attachment load.
PTO chipperWoodMaxx
8″ max. chip diameter · 19 PTO hp minimum; maximum not stated
Resolve the conflicting published specifications for the exact model revision.
PTO chipperFarmer-Helper
6.5″ manual feed-opening short side, inches · 25–45 PTO hp in current index-linked manual; older capacity/range conflicts retained
Confirm the complete operating weight; a shipping weight cannot establish the attachment load.
6 more possible options in the full comparison table — see all.
FLAIL MOWERS FOR THE FARMALL 40A
19 of 23 flail mowers we track pass the published power, hitch and speed screen on at least one configuration. Each still has a detail to confirm with the seller.
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
55″ cutting width, inches · 24–45 PTO hp · Hammer blades only
Resolve the conflicting published specifications for the exact model revision.
Flail mowerFarmer-Helper
60″ cutting width, inches · 25–65 PTO hp on current page; linked-manual basis/limit conflicts
Confirm the complete operating weight; a shipping weight cannot establish the attachment load.
Flail mowerTMG Industrial
60″ cutting width · 30–60 hp · basis unclear
Ask the manufacturer whether the horsepower range means engine or PTO power.
Flail mowerFarmry
47.2″ cutting width, inches · 25–45 hp · basis unclear
Ask the manufacturer whether the horsepower range means engine or PTO power.
Flail mowerLand Pride
60″ cutting width · 33–80 tractor hp · engine/PTO basis unspecified
Ask the manufacturer whether the horsepower range means engine or PTO power.
13 more possible options in the full comparison table — see all.
U.S. Farmall 40A · 12x12 mechanical shuttle with synchro shift · MFD · ROPS · independent PTO
Current U.S. Case IH Farmall 40A (non-cab, MFD) from the Case IH specification sheet and the current model page. 3,053 lb. Mid PTO optional.
U.S. Farmall 40A · 3-range hydrostatic · MFD · ROPS · independent PTO
Current U.S. Case IH Farmall 40A (non-cab, MFD) from the Case IH specification sheet and the current model page. 3,053 lb. Mid PTO optional.
Case IH’s August 2026 A-series sheet lists 35.9 PTO hp (mechanical) and 34.8 (HST) for the 40A; the current 40A page still lists 34.0 and 32.0, the figures in the 2023 compact brochure. The current 35A page already shows the sheet’s new 31/30.1.
The newer sheet’s 35.9 / 34.8 are recorded; the page’s 34.0 / 32.0 are shown. The two straddle Woodland Mills WC88’s 35-PTO-hp minimum on the mechanical tractor and Farmry LFS’s 35-hp maximum, so every pairing is held for review.
FOLLOW THE NUMBERS
Research record reviewed November 9, 2026. Confirm the current manual and the exact revision supplied with your machine.
FROM YOUR TRACTOR TO THE JOB
Woodland Mills rates WC88 from 35 PTO hp. Case IH’s August 2026 sheet gives the mechanical 40A 35.9; the current 40A page gives 34.0. The HST (34.8 or 32.0) is short on both. WC68, Farmry WCAP5, WoodMaxx’s chippers and the 45-PTO-hp chippers fit every figure.
Read the guide →FIELD GUIDEWoodMaxx FM-78 (30–65 PTO hp), FM-62, Farmer-Helper FH-EFGC, TMG, Farmry LFP47 and Land Pride FM2560 fit the 40A on every Case IH figure. Farmry’s LFS mowers stop at 35 hp: the 40-hp engine is over, and so is the mechanical tractor’s 35.9 PTO hp on the 2026 sheet.
Read the guide →