THE ACREAGE EQUIPMENT FIELD GUIDE
Cab or open station: when the same tractor model lists different PTO power and weight
A cab tractor can carry a different PTO rating from the open-station version of the same model, and it always weighs more. Kubota’s LX20 specification sheet lists the LX4020 cab 1.4 PTO hp below the open-station tractor, and its 2026 catalog prints the cab weight in the open-station column. Check which configuration a published figure belongs to before screening an attachment.
By Acreage Equipment · Reviewed November 8, 2026 · Specification research, not a field test
THE DECISION IN NUMBERS
Open-station and cab figures in Kubota’s current documents
Values quoted from Kubota’s LX20 specification sheet (PDF modified April 10, 2024), 2026 Full Line Catalog and current U.S. series pages, reviewed November 8, 2026.
Scroll the table sideways on smaller screens.
| Model | PTO hp: open / cab | Weight: open / cab | Note |
|---|---|---|---|
| Kubota LX4020 | 32.6 / 31.2 | 2,191 / 2,624 lb | Catalog prints 2,624 under the open-station HSD |
| Kubota LX3520 | 28.7 / 28.7 | 2,191 / 2,624 lb | No PTO difference |
| Kubota L4270 Deluxe | 32.5 shared | 3,935 / 4,288 lb | Power listed once for ROPS / cab |
| Kubota L5070 Premium | 39.8 shared | 4,266 / 4,663 lb | Weights in cells shared with L4470 Premium |
Sources for this decision table (3)
- Kubota LX20 specification sheet (PDF modified April 10, 2024) ↗Printed pp14–15: LX4020HSD and LX4020HSDC columns
- Kubota 2026 Full Line Catalog — LX20 Series, printed p8 / PDF p10 ↗LX20 table: gross and PTO horsepower, Category I, lift 24 in. behind lift point, width, tractor weight
- Kubota 2026 Full Line Catalog — Grand L70, printed p21 / PDF p23 ↗Engine model, Engine Gross Power, PTO HP Power / RPM, Rated Revolution, weights, pump capacity, lift force, Rear PTO – Engine Speed, 3-Point Hitch
1.4 hp less with a cab
Kubota’s LX20 specification sheet lists 32.6 PTO hp for the LX4020HSD and 31.2 for the LX4020HSDC cab, from the same 39.8-gross-hp engine. The current web page shows the LX4020 as “31.2–32.6”. Kubota does not state the reason; running the cab’s air conditioning and fan is one plausible draw, but the sheet does not say so. On the LX3520, both versions list 28.7, so the difference is not universal.
When 1.4 hp decides a screen
For most attachments 1.4 hp makes no difference. Near a limit it can: the LX4020HSD is 2.6 over the 30-hp ceiling of Woodland Mills WC46 and TFG55, and the cab 1.2 over. Both are excluded either way. A tractor rated 35.6 PTO hp open and 34.2 in a cab would be inside WC88’s 35-hp minimum in one and outside it in the other. Use the figure for the configuration you are buying.
Cab weight in the wrong column
The 2026 catalog’s LX20 table prints 2,624 lb under LX4020HSD. The specification sheet gives 2,191 lb for the open-station HSD and 2,624 lb for the HSDC cab. On the Grand L70, Kubota prints separate ROPS and cab rows: 3,935 and 4,288 lb for the L4270 Deluxe, 4,266 and 4,663 lb for the L5070 Premium. The cab adds roughly 350 to 430 lb on these models.
Does cab weight help stability?
Cab weight raises total mass but sits high and between the axles. It does not replace front ballast for a heavy rear implement, and it does not change the hitch’s lift rating. Use the operator manual’s ballast table for the configuration and attachment, and check cab height against sheds and branches.
Take these questions with you.
- Is the PTO figure I am using for the cab or the open-station version of my model?
- Does the manufacturer list a separate PTO rating for the cab configuration?
- Which weight does the spec table give for my configuration, ROPS or cab?
- What front ballast does the manual require for my attachment in my configuration?
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 8, 2026. Confirm the current manual and the exact revision supplied with your machine.
- Kubota LX20 specification sheet (PDF modified April 10, 2024)Printed pp14–15: LX4020HSD and LX4020HSDC columns
- Kubota 2026 Full Line Catalog — LX20 Series, printed p8 / PDF p10LX20 table: gross and PTO horsepower, Category I, lift 24 in. behind lift point, width, tractor weight
- Kubota current U.S. LX Series page — LX4020 specificationsLX4020: PTO HP 31.2–32.6; Hydraulic Flow 9.1; 3-Point Hitch Capacity 24in behind 2535
- Kubota current U.S. Grand L70 Series pageL4270DLX and L5070PRM model specifications
- Woodland Mills WC46 official product pageCapacity and tractor power range
- Woodland Mills WC88 official U.S. pageCapacity, including full-diameter/full-speed condition; price
- Woodland Mills WC46 operator manual, Rev C, 28-May-2024 — Printed p9 product/shipping weights; p12 Cat 1 and PTO range; operation/setup sections
- Woodland Mills official U.S. product page — Capacity and hydraulic infeed sections; current 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
- Current linked WC88 operator manual, Rev C, 22-Aug-2022
