THE ACREAGE EQUIPMENT FIELD GUIDE
Check the metric figure: catching errors on a tractor spec sheet
Many tractor specification tables print a metric value beside each U.S. figure. Converting one to the other takes a few seconds and can show which of two conflicting numbers is a typo. It cannot settle differences smaller than the rounding in the metric figure.
By Acreage Equipment · Reviewed November 8, 2026 · Specification research, not a field test
THE DECISION IN NUMBERS
Conversion checks on Mahindra’s published figures
Conversions use 1 U.S. gallon = 3.785 L, 1 inch = 25.4 mm and 1 kW = 1.341 hp, rounded to one decimal place. A consistent pair shows internal agreement, not a measured or verified value.
Scroll the table sideways on smaller screens.
| Figure | U.S. value(s) published | Metric value | Converted check |
|---|---|---|---|
| 1640 total hydraulic flow | 11.4 gpm (web) / 11.1 gpm (brochure) | 41.8 L/min (both) | ≈ 11.0 gpm: brochure consistent |
| 4550 overall height | 103.74 in. (web) / 93.7 in. (brochure) | 2,380 mm (both) | 93.7 in.: web inch value inconsistent |
| 1626 engine power | 24.8 hp (table) / 25.9 HP (model card) | 18.5 kW (table) | 24.8 hp: table consistent |
| 1600 Series lift at 24 in. | 1,720 lb | 780 kg | 1,719.6 lb: consistent |
| 1635 Shuttle vs 1640 HST PTO | 27.6 / 27.7 hp | 20.6 kW (both) | 27.6 hp: cannot separate a 0.1-hp difference |
Sources for this decision table (4)
- Mahindra USA 1600 Series page ↗Specifications table: 1640 HST / HST Cab / Shuttle columns
- Mahindra USA 1600 Series brochure, Rev 09022025 ↗PDF p5 Tractor Specifications: 1640 Shuttle / HST / HST Cab columns (engine, PTO type and hp, hydraulics, lift at 24 in., weight)
- Mahindra USA 4500 Series page ↗Specifications table: 4540 4WD / 4550 4WD (Engine, PTO, Hydraulics, 3-point hitch, Dimensions & Weight)
- Mahindra USA 4500 Series brochure linked from the series page (PDF modified November 2019) ↗p4 Specifications: 4540 2WD / 4540 4WD / 4550 4WD columns
Flow: 11.4 gpm or 11.1?
Mahindra’s current web table lists the 1640’s maximum total hydraulic flow as 11.4 gpm (41.8 L/min). Its 2025 brochure lists 11.1 gpm (41.8 L/min). One U.S. gallon is about 3.785 liters, so 41.8 L/min is about 11.0 gpm. Both sources agree on the metric value, which points to 11.1 as the consistent U.S. figure. Neither is an outlet flow at a rear remote.
Height: 103.74 inches or 93.7?
The current 4500 Series table lists the 4550 4WD’s overall height as 103.74 in. (2,380 mm); the linked brochure lists 93.7 in. (2,380 mm). 2,380 mm divided by 25.4 is 93.7 inches. The web table’s inch figure appears to be a transcription error. Height does not change an attachment screen, but it matters for a shed door.
Horsepower and kilowatts
One kilowatt is about 1.341 hp. Mahindra’s 1626 lists 24.8 hp (18.5 kW); 18.5 kW is 24.8 hp, which supports the table over the 25.9 HP on the website’s model card. The 4540’s 31 hp (23.1 kW) and the 4550’s 38 hp (28.3 kW) also convert cleanly. A matching pair does not prove the number is right; it shows the two values were written down together.
Where the check runs out
Mahindra lists 20.6 kW for both the 1635 Shuttle (27.6 PTO hp) and the 1640 HST (27.7). 20.6 kW is about 27.6 hp, but a kilowatt figure rounded to one decimal cannot tell 27.6 from 27.7. A conversion check can catch a misplaced digit, not settle a 0.1-hp margin. When a margin is that small, ask the manufacturer for the rating on the actual serial.
Take these questions with you.
- Does the U.S. figure match its metric value when converted, and if two sources differ, which one is consistent?
- Is the conflicting figure a measured value or a transcription of the same metric number?
- Is the margin I am relying on smaller than the rounding in the metric figure?
- Will the dealer confirm the corrected value against the operator manual for this serial?
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.
- Mahindra USA 1600 Series pageSpecifications table: 1640 HST / HST Cab / Shuttle columns
- Mahindra USA 1600 Series brochure, Rev 09022025PDF p5 Tractor Specifications: 1640 Shuttle / HST / HST Cab columns (engine, PTO type and hp, hydraulics, lift at 24 in., weight)
- Mahindra USA 4500 Series pageSpecifications table: 4540 4WD / 4550 4WD (Engine, PTO, Hydraulics, 3-point hitch, Dimensions & Weight)
- Mahindra USA 4500 Series brochure linked from the series page (PDF modified November 2019)p4 Specifications: 4540 2WD / 4540 4WD / 4550 4WD columns
- Woodland Mills official U.S. product page — Capacity and hydraulic infeed sections; current 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
- Official LFP47 product page: configuration, weight and price
- LFP Series operator manual, Rev 1.3, printed pp17–20
- 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
