THE ACREAGE EQUIPMENT FIELD GUIDE
When a tractor’s PTO rating changes between spec sheets
Case IH’s August 2026 sheet rates the Farmall 35A at 31.0 PTO hp and the 40A at 35.9, up from 29.7 and 34.0 in its 2023 brochure. Each change crosses an attachment limit, and the current 40A page still shows the old figures.
By Acreage Equipment · Reviewed November 9, 2026 · Specification research, not a field test
THE DECISION IN NUMBERS
Case IH Farmall 35A and 40A: 2023 brochure against the August 2026 sheet
PTO hp is mechanical / hydrostatic. Lift is at 24 in. behind the pin.
Scroll the table sideways on smaller screens.
| Model | 2023 brochure | August 2026 sheet | Current page | Limit crossed |
|---|---|---|---|---|
| Farmall 35A | 29.7 / 28 PTO hp; 1,808 lb | 31.0 / 30.1 PTO hp; 1,596 lb | 31 / 30.1 | FM-78’s 30 minimum; WC46 and TFG55’s 30 maximum |
| Farmall 40A | 34 / 32 PTO hp; 1,808 lb | 35.9 / 34.8 PTO hp; 1,596 lb | 34.0 / 32.0 | WC88’s 35 minimum and Farmry LFS’s 35 maximum (mechanical) |
Sources for this decision table (4)
- Case IH Farmall compact tractors brochure (©2022, PDF created June 6, 2023) ↗Printed pp28–29 specifications: Farmall 35A/35C 29.7 / 28 and 40A/40C 34 / 32 PTO hp (mechanical / hydrostatic); Lift Capacity @ 24 in. Behind Pin 1,808 lb spanning 35A–40C
- Case IH Farmall Compact A specification sheet, models 35A–55A (PDF created August 24, 2026) ↗Specifications: Engine HP, PTO HP (Mechanical Trans. / Hydrostatic Trans.), 3pt Hitch Category 1, Lift Capacity @ 24 in. Behind Pin, implement and total flow, weight
- Case IH Farmall Compact 35A current U.S. product page ↗PTO Horsepower: 31 HP (Mechanical Shuttle), 30.1 HP (HST)
- Case IH Farmall Compact 40A current U.S. product page ↗40 HP; PTO Horsepower: 34.0 HP (Mechanical), 32.0 HP (HST)
Small changes, real limits
The 35A’s 1.3-hp increase moves it from 0.3 short of WoodMaxx FM-78’s 30-PTO-hp minimum to 1 over, and from inside Woodland Mills WC46’s 30-hp ceiling to 1 over. The 40A’s 1.9-hp increase moves the mechanical tractor past Woodland Mills WC88’s 35 minimum and Farmry LFS’s 35 maximum.
Lift moved the other way
The 2023 brochure lists 1,808 lb at 24 inches behind the pin across the 35A and 40A; the 2026 sheet lists 1,596. Every attachment on this site weighs less than both, but a heavier implement would not.
Pages lag sheets
The current 35A page already shows 31 / 30.1. The 40A page still shows 34.0 / 32.0. When a page and a newer sheet disagree, this site records the sheet, shows both and holds the pairings for review.
Match the figure to the tractor
A tractor built before the change may carry the old rating. Ask the dealer for the rating that applies to the serial number, and keep that document with the quote.
Take these questions with you.
- Which document date does the PTO figure come from?
- Does the current model page match the newest sheet?
- Which rating applies to this serial number?
- Did the lift rating change too?
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 9, 2026. Confirm the current manual and the exact revision supplied with your machine.
- Case IH Farmall compact tractors brochure (©2022, PDF created June 6, 2023)Printed pp28–29 specifications: Farmall 35A/35C 29.7 / 28 and 40A/40C 34 / 32 PTO hp (mechanical / hydrostatic); Lift Capacity @ 24 in. Behind Pin 1,808 lb spanning 35A–40C
- Case IH Farmall Compact A specification sheet, models 35A–55A (PDF created August 24, 2026)Specifications: Engine HP, PTO HP (Mechanical Trans. / Hydrostatic Trans.), 3pt Hitch Category 1, Lift Capacity @ 24 in. Behind Pin, implement and total flow, weight
- Case IH Farmall Compact 35A current U.S. product pagePTO Horsepower: 31 HP (Mechanical Shuttle), 30.1 HP (HST)
- Case IH Farmall Compact 40A current U.S. product page40 HP; PTO Horsepower: 34.0 HP (Mechanical), 32.0 HP (HST)
- WoodMaxx FM-78 official product pageBlack/hammer SKU FM-78-0006; 30–65 PTO hp; 70-in. cut; 80 in. overall; weight; hitch type; price
- WoodMaxx 2025-to-current FM series operator manualPrinted p40 / PDF p41: blade-specific PTO requirements, cutting width, fixed extents, hitch category and Category 2 bushings, product weight
- Woodland Mills WC46 operator manual, Rev C, 28-May-2024 — Printed p9 product/shipping weights; p12 Cat 1 and PTO range; operation/setup sectionsPrinted p9: 15–30 PTO hp; 587 lb
- Woodland Mills WC88 official U.S. page35–100+ PTO hp; capacity, including full-diameter/full-speed condition; hydraulic infeed; price
- Farmry LFS61 official product pageSpecifications > Tractor Power Range
- Farmry LFS Series operator manual, Rev 1.7 — Printed pp17–18 specifications; p28 tractor stability
- Farmry flail mower comparison table — Net-weight comparison; may exclude PTO shaft
- Woodland Mills official U.S. product page — Capacity and hydraulic infeed sections; current price
- Current linked WC88 operator manual, Rev C, 22-Aug-2022
- WoodMaxx manual index: Models 2025 to current
