Mahindra 1640 · PTO WOOD CHIPPERS
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.
By Acreage Equipment · Reviewed November 8, 2026 · Specification research, not a field test
PUT THIS GUIDE TO WORK
See published mismatches and the checks still needed.
BEST MATCHES 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.
THE DECISION IN NUMBERS
Tractor reference: Mahindra 1640 HST 27.7 PTO hp (live with o/r clutch) and 1640 Shuttle 29.9 PTO hp (independent), 38.7 engine hp with no named standard; 1,720 lb lift at 24 in. Requirements are the retained manufacturer figures; none is a field test or an approved pairing.
Scroll the table sideways on smaller screens.
| Chipper | Published requirement | 1640 HST (27.7 PTO) | 1640 Shuttle (29.9 PTO) |
|---|---|---|---|
| Woodland Mills WC46 / TFG55 | 15–30 PTO hp (TFG55 table 12–30) | Inside; 2.3 below the maximum | Inside; 0.1 below the maximum |
| Woodland Mills WC68 | 20–50 PTO hp; over 40 for full 6-inch logs at full feed | Inside (+7.7); below full-feed condition | Inside (+9.9); below full-feed condition |
| WoodMaxx MX-9900 | 25 PTO hp minimum; separate 50+ HP full-capacity statement | 2.7 hp above minimum | 4.9 hp above minimum |
| Farmer-Helper FH-BX62S | 25–45 PTO hp (current manual) | 2.7 hp above minimum | 4.9 hp above minimum |
| Wallenstein BX52S | 22–55 engine hp | 38.7 inside; standard unnamed | 38.7 inside; standard unnamed |
| Wallenstein BX36S | 12–30 engine hp | 38.7 exceeds maximum by 8.7: excluded | 38.7 exceeds maximum by 8.7: excluded |
| Woodland Mills WC88 | 35 PTO hp minimum | 7.3 hp below: excluded | 5.1 hp below: excluded |
MX-9900 and FH-BX62S each start at 25 PTO hp. The 1640 HST’s 27.7 clears that by 2.7 hp and the Shuttle’s 29.9 by 4.9, compared with 1.0 and 2.6 on the 1635. That margin is still a long way from the makers’ capacity statements: WoodMaxx associates MX-9900’s full 9-inch capacity with 50+ HP and describes 5-inch hardwood or 7-inch softwood at 25 PTO hp. Choose between them on feed system and price, then ask what diameter each expects at your rating.
Woodland Mills lists 35 PTO hp as WC88’s minimum. The HST is 7.3 hp short and the Shuttle 5.1. Neither transmission is inside the published range, and the 38.7-hp engine figure cannot replace a PTO requirement. A 1640 owner who needs 8-inch capacity is looking at a different tractor, not a different chipper setting.
Wallenstein rates BX36S at 12–30 engine hp. The 1640’s 38.7-hp engine exceeds that by 8.7 hp, so the smallest Wallenstein is outside its range even though it is the lightest option. WC46 and TFG55 are rated by PTO hp with a 30-hp top: the HST is 2.3 hp inside and the Shuttle 0.1. A dealer figure even slightly above 29.9 would put the Shuttle over, so confirm the rating for the actual serial before choosing either.
Mahindra lists 1,720 lb at 24 inches for every 1600 Series configuration, despite the 1640’s larger four-cylinder engine and roughly 3,175–3,186-lb tractor weight. Retained chipper weights here run from WC68’s 747 lb to MX-9900’s approximately 816-lb dry weight, all under 1,720, but none is a confirmed complete operating load. Ask for the assembled weight and plan ballast with the dealer.
Wallenstein’s current pages rate the 5-inch BX52RI (30–55 engine hp, Category I). Two hydraulic rollers pull material in at a set rate, and P3 PULSE reverses them when the rotor slows; they need 3–6 gpm from a rear remote or Wallenstein’s PTO-driven power pack. The Mahindra 1640’s 38.7 engine hp is inside the BX52RI page’s 30–55 but under the 40 that the manual’s table gives for the BX52R, so ask Wallenstein which floor applies to the serial on offer. Its published lift at 24 inches, 1,720 lb, carries the 845-lb BX52RI with 875 lb to spare. Wallenstein lists no price; ask a dealer.
THE SCREEN, WITH ITS LIMITS VISIBLE
No pairing below is manufacturer-confirmed. “Preliminary” still requires implement limits, load center, ballast, hitch geometry and shaft checks.
Initial specification screen only. Scroll the table on small screens. Read the product page for every remaining check.
| Attachment | U.S. HST · 3 range · open station · live PTO with o/r clutch27.7 PTO hp | U.S. 8F/8R synchro shuttle · open station · independent PTO29.9 PTO hp |
|---|---|---|
| Farmry WCAP5 →412 lb · Net weight WITH PTO shaft, manual Rev1.5 p20 | Needs specification reviewConfirm the conflicting tractor specifications in your serial-specific manual; official source values differ. | Needs specification reviewConfirm the conflicting tractor specifications in your serial-specific manual; official source values differ. |
| Farmry WCAP5 PRO →386 lb · Product weight, current manual Rev1.4 p13; whether PTO shaft is included in this weight is not stated | Needs specification reviewResolve the conflicting published specifications for the exact model revision. | Needs specification reviewResolve the conflicting published specifications for the exact model revision. |
| Woodland Mills WC46 →587 lb · Product weight, 2024 operator manual Rev C p9 | Needs specification reviewConfirm the conflicting tractor specifications in your serial-specific manual; official source values differ. | Needs specification reviewConfirm the conflicting tractor specifications in your serial-specific manual; official source values differ. |
| Woodland Mills WC68 →747 lb · Product weight, 2024 operator manual Rev C p9 | Needs specification reviewConfirm the conflicting tractor specifications in your serial-specific manual; official source values differ. | Needs specification reviewConfirm the conflicting tractor specifications in your serial-specific manual; official source values differ. |
| Woodland Mills TFG55 PTO →346 lb · Product weight, Rev B manual p9 | Needs specification reviewResolve the conflicting published specifications for the exact model revision. | Needs specification reviewResolve the conflicting published specifications for the exact model revision. |
| Woodland Mills WC88 →900 lb · Product weight: 900 lb in current linked 2022 Rev C manual, printed p9; shipping weight is 1,054 lb. The manual does not explicitly identify whether quoted product weight includes the PTO shaft or filled hydraulic oil. | Published mismatch27.7 PTO hp is below the 35 hp minimum. | Published mismatch29.9 PTO hp is below the 35 hp minimum. |
| WoodMaxx WM-8H →Operating weight unconfirmed · Operating weight is unverified in the current official product page and linked manual. The page lists 990 lb SHIPPING weight; do not use it as operating weight. Confirm weight with PTO shaft and a filled hydraulic tank. | Needs specification reviewConfirm the complete operating weight; a shipping weight cannot establish the attachment load. | Needs specification reviewConfirm the complete operating weight; a shipping weight cannot establish the attachment load. |
| WoodMaxx WM-8M →775 lb · Product page states 775 lb total weight on the three-point hitch; shaft/fluid inclusion is not explicit. Shipping sections conflict at 950 versus 990 lb. Confirm the delivered operating assembly and shipping revision. | Needs specification reviewResolve the conflicting published specifications for the exact model revision. | Needs specification reviewResolve the conflicting published specifications for the exact model revision. |
| WoodMaxx MX-8800 →Operating weight unconfirmed · Complete operating weight is unverified. Current Rev D manual (printed p45 / pdf p46, technical specifications) states approximately 772 lb DRY weight; page separately states 1,004 lb SHIPPING weight. Shaft inclusion in dry weight is not explicit. Do not substitute either figure for a confirmed shaft/oil-inclusive operating load. | Needs specification reviewConfirm the complete operating weight; a shipping weight cannot establish the attachment load. | Needs specification reviewConfirm the complete operating weight; a shipping weight cannot establish the attachment load. |
| WoodMaxx MX-9900 →Operating weight unconfirmed · Complete operating weight is unverified. Current Rev C manual (printed p42 / pdf p43, technical specifications) states approximately 816 lb DRY weight; page separately states 1,048 lb SHIPPING weight. Shaft inclusion in dry weight is not explicit. Do not substitute either figure for a confirmed shaft/oil-inclusive operating load. | Needs specification reviewConfirm the complete operating weight; a shipping weight cannot establish the attachment load. | Needs specification reviewConfirm the complete operating weight; a shipping weight cannot establish the attachment load. |
| Farmer-Helper FH-BX42 →Operating weight unconfirmed · Complete operating weight is unverified. Current index-linked manual p2 lists 430 lb net and 450 lb shipping. Current product/series pages instead list 423 lb net and 458 lb shipping. Net-weight shaft/assembly inclusions are unstated; none is substituted for a verified operating load. | Needs specification reviewConfirm the complete operating weight; a shipping weight cannot establish the attachment load. | Needs specification reviewConfirm the complete operating weight; a shipping weight cannot establish the attachment load. |
| Farmer-Helper FH-BX62S →Operating weight unconfirmed · Complete operating weight is unverified. Current index-linked manual p2: 830 lb net / 860 lb shipping. Current series page: 835 lb net / 915 lb gross. Product page calls 835 lb both total and gross; older product-linked manual p38 gives 797 lb net / 850 lb gross. Shaft/assembly inclusions are unstated, so no reference is used as operating weight. | Needs specification reviewConfirm the complete operating weight; a shipping weight cannot establish the attachment load. | Needs specification reviewConfirm the complete operating weight; a shipping weight cannot establish the attachment load. |
| Wallenstein BX36S →Operating weight unconfirmed · Official page Total Weight and Jan-2025 manual Weight: 395 lb. Neither states whether the supplied shaft and all operating equipment are included; complete operating and separate shipping weights remain unverified. | Published mismatch38.7 engine hp exceeds the published 30 hp range. | Published mismatch38.7 engine hp exceeds the published 30 hp range. |
| Wallenstein BX52S →Operating weight unconfirmed · Official page Total Weight and Jan-2025 manual Weight: 505 lb. Neither states whether the supplied shaft and all operating equipment are included; complete operating and separate shipping weights remain unverified. | Needs specification reviewConfirm the correct attachment and driveline configuration for the tractor’s PTO speed; listed speed options are discrete settings. | Needs specification reviewConfirm the correct attachment and driveline configuration for the tractor’s PTO speed; listed speed options are discrete settings. |
| Wallenstein BX72S →Operating weight unconfirmed · Current official page Total Weight and Jan-2025 manual Weight: 728 lb. Neither defines complete shaft-inclusive operating mass or a separate shipping weight. Confirm the assembled operating load; do not relabel 728 lb as dry or shipping weight. | Published mismatch38.7 engine hp is below the 50 hp minimum. | Published mismatch38.7 engine hp is below the 50 hp minimum. |
| Wallenstein BX102S →1143 lb · Total Weight 1143 lb (519 kg) on the current page and in the Jan-2025 BX-S manual. Neither says whether the PTO shaft is included; confirm the assembled operating load. | Published mismatch38.7 engine hp is below the 80 hp minimum. | Published mismatch38.7 engine hp is below the 80 hp minimum. |
| Wallenstein BX52RI →845 lb · Total weight 845 lb on the current page and operating weight 845 lb in the BXR manual §10.1. Neither says whether the PTO shaft is included. | Needs specification reviewConfirm the correct attachment and driveline configuration for the tractor’s PTO speed; listed speed options are discrete settings. | Needs specification reviewConfirm the correct attachment and driveline configuration for the tractor’s PTO speed; listed speed options are discrete settings. |
| Wallenstein BX72RI →1300 lb · Total weight 1,300 lb on the current page and operating weight 1,300 lb in the BXR manual §10.1. Neither says whether the PTO shaft is included. | Published mismatch38.7 engine hp is below the 45 hp minimum. | Published mismatch38.7 engine hp is below the 45 hp minimum. |
| Wallenstein BX102RI →1950 lb · Total weight 1,950 lb on the current page and operating weight 1,950 lb in the BXR manual §10.1. Neither says whether the PTO shaft is included. | Published mismatch38.7 engine hp is below the 75 hp minimum. | Published mismatch38.7 engine hp is below the 75 hp minimum. |
With 26–30 PTO hp, is MX-9900’s hydrostatic feed and 9-inch opening worth almost three times FH-BX62S’s price?
Read the guide →FIELD GUIDETake the complete setup, not just a horsepower number, to the manufacturer.
Read the guide →FOLLOW THE NUMBERS
Research record reviewed November 8, 2026. Confirm the current manual and the exact revision supplied with your machine.