PTO chipperWoodland Mills
WC46
4″ max. chip diameter · 15–30 PTO hp
Confirm the conflicting tractor specifications in your serial-specific manual; official source values differ.
Mahindra · COMPACT TRACTOR ATTACHMENTS
The 1640 Shuttle’s 29.9 PTO hp is the closest any tractor on this site comes to a 30-hp minimum without reaching it. The HST lists 27.7. Both share a 38.7-hp engine, so attachments rated in PTO horsepower and those rated in engine horsepower give very different answers on this tractor.
By Acreage Equipment · Reviewed November 8, 2026 · Specification research, not a field test

PTO WOOD CHIPPERS FOR THE 1640
13 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
4″ max. chip diameter · 15–30 PTO hp
Confirm the conflicting tractor specifications in your serial-specific manual; official source values differ.
PTO chipperWoodland Mills
5″ max. chip diameter · 12–30 PTO hp in table; manual hitch paragraph says 15–30 — resolve before selection
Resolve the conflicting published specifications for the exact model revision.
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 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 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.
PTO chipperWallenstein
5″ max. chip diameter · 22–55 engine hp · official U.S. page
Confirm the correct attachment and driveline configuration for the tractor’s PTO speed; listed speed options are discrete settings.
7 more possible options in the full comparison table — see all.
FLAIL MOWERS FOR THE 1640
16 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
55″ cutting width, inches · 24–45 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
Confirm rear remotes, hydraulic flow and pressure requirements.
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 mowerFarmry
47.2″ cutting width, inches · 25–45 hp · basis unclear
Ask the manufacturer whether the horsepower range means engine or PTO power.
Flail mowerFarmry
61″ cutting width · 15–35 hp · basis unclear
Ask the manufacturer whether the horsepower range means engine or PTO power.
Flail mowerTMG Industrial
60″ cutting width · 30–60 hp · basis unclear
Ask the manufacturer whether the horsepower range means engine or PTO power.
10 more possible options in the full comparison table — see all.
U.S. HST · 3 range · open station · live PTO with o/r clutch
Mahindra 1640 HST three-range hydrostatic open-station tractor in the 2025 U.S. brochure and current specification table. The 1640 HST Cab lists the same 27.7 PTO hp but 3,627 lb and different height; cab fitment is outside this profile. No model-year or serial cutoff is established.
U.S. 8F/8R synchro shuttle · open station · independent PTO
Mahindra 1640 Shuttle (8F/8R, synchromesh on forward-reverse shuttle, constant mesh on gear shift) open-station tractor in the 2025 U.S. brochure and current specification table. No model-year or serial cutoff is established.
The 2025 brochure lists 11.1 gpm (41.8 L/min) total pump output for the 1640; the current web specification table lists 11.4 gpm (41.8 L/min).
Both cite 41.8 L/min, which is about 11.0 gpm, so the brochure’s 11.1 is retained as the consistent figure. Neither is a rear-outlet flow. Main implement pump output (7.7 gpm) agrees in both.
FOLLOW THE NUMBERS
Research record reviewed November 8, 2026. Confirm the current manual and the exact revision supplied with your machine.
FROM YOUR TRACTOR TO THE JOB
A 1640 has 2.7 to 4.9 hp of margin over 25-PTO-hp chipper minimums, the most of any 1600 Series tractor. It is still 5.1 hp or more short of WC88’s 35-hp minimum. Its 38.7-hp engine rules out Wallenstein’s BX36S, and the Shuttle sits just 0.1 hp under the 30-hp ceiling of the smallest Woodland Mills chippers.
Read the guide →FIELD GUIDEThe 1640 Shuttle’s 29.9 PTO hp falls 0.1 hp short of the 30-PTO-hp minimum on WoodMaxx’s FM-78 family, and the HST is 2.3 short. Below that line the shortlist is broad: the 55–60-inch hammer class starts at 24–25 hp, and both transmissions exceed FM-54 Y’s 25-hp maximum. Mowers that do not say engine or PTO are where the 1640’s answer changes.
Read the guide →