THE ACREAGE EQUIPMENT FIELD GUIDE
When the owner’s manual has no PTO figure for your model
An operator’s manual is usually the most specific source for a tractor, but some do not give PTO horsepower model by model. KIOTI’s 2026 CK2640/CK3540/CK4040 manual lists engine gross power and no PTO figure at all. Its 2021 NS manual prints one PTO value in a five-model table. Where that happens, the PTO figure comes from the brochure or web page, and those can disagree.
By Acreage Equipment · Reviewed November 9, 2026 · Specification research, not a field test
THE DECISION IN NUMBERS
KIOTI manuals and where the PTO figure comes from
Values quoted from KIOTI’s CK40 owner’s manual (2026), NS ROPS owner’s manual (2021), NS brochure (September 2025) and current CK40 and NS web pages, reviewed November 9, 2026.
Scroll the table sideways on smaller screens.
| Model | Manual engine gross hp | Manual PTO figure | Brochure / web PTO hp |
|---|---|---|---|
| CK2640 / CK2640H | 24.5 | None | Web: 19.5 / 18.7 |
| CK3540 / CK3540H | 34.9 | None | Web: 31 / 28.9 |
| CK4040 / CK4040H | 39.6 (web 39.50) | None | Web: 34.8 / 33.3 |
| NS4710 / NS4710H | 45 / 44.9 | One entry for five models: 47.8 | Brochure 36.6 / 36.3; web 36.6 / 36.6 |
| NS5310H | 50.3 | Same single entry | Brochure 41.8; web 36.6 |
| NS6010 / NS6010H | 57.7 | Same single entry | Brochure 48.3 / 47.9; web 48.3 / 47.8 |
Sources for this decision table (5)
- KIOTI CK2640/CK3540/CK4040 owner’s manual (PDF created March 31, 2026) ↗PDF pp64–75 (printed 4-4 to 4-12) Major Specifications: engine gross power, displacement, lift at lift point and 24 in., weights; no PTO power row
- KIOTI CK3540 and CK4040 current U.S. product pages ↗Full Specs: Power, PTO Power, Lift Capacity (CK3540, CK3540H, CK4040, CK4040H pages)
- KIOTI NS ROPS owner’s manual NS-ROPS-OM-ENGLISH-210916 ↗PDF pp47–49 (printed 3-3 to 3-5): engine gross power, single Rated PTO Power entry, Category I, 2,493 lb @24 in. / 2,940 lb @lift point; PDF pp52–54: implement limitations
- KIOTI NS Series brochure (PDF created September 12, 2025) ↗PDF p12 Specifications: Engine Gross, PTO hp, 3-point hitch, Maximum Lifting Capacity* (@ 24 in. aft of hitch), width, weight
- KIOTI NS5310H current U.S. product page ↗Full Specs: Power, PTO Power, Lift Capacity, Hitch Category, Width, Weight
The CK40 manual
KIOTI’s CK40 owner’s manual, created March 2026, lists engine gross power of 24.5, 34.9 and 39.6 hp for the CK2640, CK3540 and CK4040, plus displacement, lift and weights. Its major specification tables have no PTO power row. KIOTI’s current web pages give 19.5/18.7, 31/28.9 and 34.8/33.3 PTO hp (gear/HST), within 0.1 hp of the CK2620, CK3520 and CK4020 figures already on this site.
The NS manual
KIOTI’s 2021 NS ROPS manual lists engine gross power for each of five models, then a Rated PTO Power row with a single entry: 35.6 kW (47.8 hp). That matches the NS6010H web page, not the NS4710 or NS5310H. KIOTI’s September 2025 brochure gives five PTO figures: 36.6, 36.3, 41.8, 48.3 and 47.9.
Choosing a figure
Without a per-model manual figure, use the dated technical document, usually the brochure or spec sheet, and show any web figure beside it. Where they differ near an attachment limit, use the lower figure against a minimum and the higher against a maximum until the dealer confirms. On the NS5310H, 41.8 (brochure) against 36.6 (web) decides Woodland Mills WC68’s over-40 full-feed condition.
Do not fill the gap from the engine figure
PTO power is not a fixed share of engine power. On KIOTI’s own figures, the NS4710’s 36.6 PTO hp is 82% of 44.9 engine hp and the NX4510H’s 33.9 is 75% of 45. Estimating PTO power from engine power can miss a limit by several horsepower.
Take these questions with you.
- Does my tractor’s operator manual give a PTO figure for my exact model and transmission?
- If not, which dated brochure or spec sheet does, and does the web page agree?
- Is my tractor within the difference of an attachment limit?
- Will the dealer state the PTO rating in writing for the tractor on offer?
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.
- KIOTI CK2640/CK3540/CK4040 owner’s manual (PDF created March 31, 2026)PDF pp64–75 (printed 4-4 to 4-12) Major Specifications: engine gross power, displacement, lift at lift point and 24 in., weights; no PTO power row
- KIOTI CK3540 and CK4040 current U.S. product pagesFull Specs: Power, PTO Power, Lift Capacity (CK3540, CK3540H, CK4040, CK4040H pages)
- KIOTI NS ROPS owner’s manual NS-ROPS-OM-ENGLISH-210916PDF pp47–49 (printed 3-3 to 3-5): engine gross power, single Rated PTO Power entry, Category I, 2,493 lb @24 in. / 2,940 lb @lift point; PDF pp52–54: implement limitations
- KIOTI NS Series brochure (PDF created September 12, 2025)PDF p12 Specifications: Engine Gross, PTO hp, 3-point hitch, Maximum Lifting Capacity* (@ 24 in. aft of hitch), width, weight
- KIOTI NS4710 current U.S. product pageFull Specs: Power, PTO Power, Lift Capacity, Hitch Category, Width, Weight
- KIOTI NS5310H current U.S. product pageFull Specs: Power, PTO Power, Lift Capacity, Hitch Category, Width, Weight
- KIOTI NS6010H current U.S. product pageFull Specs: Power, PTO Power, Lift Capacity, Hitch Category, Width, Weight
- Woodland Mills WC68 official product pageCapacity, including full-diameter/full-infeed-speed condition; price
- Woodland Mills WC68 operator manual, Rev C, 28-May-2024 — Printed p9 product/shipping weights; p12 Cat 1 and PTO range; operation/setup sections
- Official U.S. WC88 page: price, capacity and drive system
- Current linked WC88 operator manual, Rev C, 22-Aug-2022
- Official FM-78 page: exact hammer variant, price and equipment
- Current FM-62/62H and FM-78/78H manual: printed p40 / PDF p41
- WoodMaxx manual index: Models 2025 to current
