John Deere 4066M · PTO WOOD CHIPPERS
WC68 and BX52S drop out for different reasons: both 57 brochure hydro and 52 unqualified PTO hp exceed WC68’s 50-PTO-hp maximum, while the current 65-engine-hp label exceeds BX52S’s 55-engine-hp maximum. WC88, BX72S and MX-9900 remain candidates for further checks, but their diameter claims use different conditions and do not establish equal performance.
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 4066M
7 of 19 pto wood chippers we track pass the published power, hitch and speed screen. Each still has a detail to confirm with the seller.
PTO chipperWoodland Mills
8″ maximum branch diameter, inches · 35–100+ PTO hp
Resolve the conflicting published specifications for the exact model revision.
PTO chipperWallenstein
7″ max. chip diameter · 50–85 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.
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 chipperWallenstein
7″ max. chip diameter · 45–85 engine hp · current U.S. page (manual table: 50–85 hp for the BX72R)
Confirm the correct attachment and driveline configuration for the tractor’s PTO speed; listed speed options are discrete settings.
PTO chipperWoodMaxx
8″ max. chip diameter · 19 PTO hp minimum; maximum not stated
Resolve the conflicting published specifications for the exact model revision.
PTO chipperWoodMaxx
8″ max. chip diameter · 19 PTO hp minimum; maximum not stated
Confirm the complete operating weight; a shipping weight cannot establish the attachment load.
1 more possible option in the full comparison table.
THE DECISION IN NUMBERS
The selected tractor reference is brochure-defined standard 4066M hydro at 57 PTO hp, with unqualified 52 retained. Current U.S. engine label is 65 hp. No finite maximum found is not permission for unlimited tractor output.
Scroll the table sideways on smaller screens.
| Product / configuration | Published power requirement | Qualified tractor comparison | Decision still needed |
|---|---|---|---|
| WC68 · 6-inch hydraulic feed | 20–50 PTO hp | 57 is 7 above maximum; unqualified 52 is 2 above | Outside the published range under both sources. Its lower minimum does not override its maximum. |
| BX52S · 5-inch gravity feed | 22–55 engine hp | Current 65 engine label is 10 above maximum | Outside the engine-power band. PTO power is the wrong basis for clearing this model. |
| WC88 · 8-inch hydraulic feed | 35 PTO hp minimum | 57 and 52 both exceed 35; neither is over 60 | The maker’s full-8-inch/full-infeed power condition is not met by either reference. Confirm intended material and permitted maximum. |
| BX72S · 7-inch gravity feed | 50–85 engine hp | 65 is inside, 15 above minimum and 20 below maximum | A documented engine band and 7-inch rating do not establish performance for the purchaser’s wood. |
| MX-9900 · up to 9-inch hydrostatic feed | 25 PTO hp minimum; maximum not stated | 57 and 52 exceed minimum by 32 and 27 respectively | Page associates full capacity with 50+ HP without repeating the basis. Clarify it and material conditions; no cross-brand output ranking follows. |
WC68’s manual caps its tractor range at 50 PTO hp. Both the 57 hydro brochure figure and unqualified 52 alternative exceed that cap, so resolving the Deere conflict does not restore it to the numerical shortlist. BX52S is different: its U.S. page specifies engine hp, with a maximum of 55. The 65-engine-hp tractor label exceeds that maximum even though a lower PTO number might look close. Neither a 20-PTO-hp minimum nor a 22-engine-hp minimum is the entire requirement. The published upper bounds remain purchase constraints; the guides do not prescribe a way to bypass them.
WC88 requires at least 35 PTO hp, but Woodland associates full 8-inch logs at full infeed speed with over 60 PTO hp. Both Deere references are below that condition. Wallenstein gives BX72S a 7-inch rating within a 50–85 engine-hp band without an equivalent full-infeed condition. WoodMaxx gives MX-9900 a 25-PTO-hp minimum and links full 9-inch capacity to 50+ HP, with the basis unstated in that phrase. Both Deere PTO references are numerically above 50, but that does not make the manufacturers’ claims interchangeable or prove that the larger opening produces more on this tractor.
BX72S uses gravity/manual feed. WC88’s hydraulic feed and MX-9900’s hydrostatic feed are self-contained, so neither depends on a tractor rear-remote feed circuit. The 4066M component’s up-to-six-remote availability is therefore not a reason to prefer either chipper. Their onboard systems, controls and delivered equipment still differ; no automatic load sensing or throughput advantage is inferred. This tractor profile documents rear 540 rpm. Wallenstein’s separate 1,000-rpm support and optional shaft do not establish a 1,000-rpm tractor output, and an economy-PTO label in one Deere component does not resolve that conflict.
MX-9900’s current manual gives approximately 816 lb dry weight; its page lists 1,048 lb shipping. WC88’s manual gives 900 lb product and 1,054 lb shipping. BX72S’s 728-lb reference does not explicitly define complete shaft-inclusive operating mass. Request complete loads and centers of gravity rather than ranking them by inconsistent weight labels. Deere’s 2,500-lb figure at 24 inches is separate from its 3,130-lb link-end figure, and the older manual’s ballasted whole-machine limit cannot be subtracted to create an implement allowance. Standard 4M hitch geometry also remains separate from Heavy Duty Category 1/2 equipment and each chipper’s quick-hitch claim.
Wallenstein’s current pages rate the 7-inch BX72RI (45–85 engine hp, Category I and II). 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 John Deere 4066M’s 65 engine hp is inside the BX72RI’s range on both the page and the manual. Its published lift at 24 inches, 2,500 lb, carries the 1,300-lb BX72RI with 1,200 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.-linked brochure HST scope · 037BLV / eHydro 1520 reference · standard 4M · 4WD · open station57 PTO hp |
|---|---|
| Farmry WCAP5 →412 lb · Net weight WITH PTO shaft, manual Rev1.5 p20 | Published mismatch65 engine hp exceeds the published 45 hp range. |
| Farmry WCAP5 PRO →386 lb · Product weight, current manual Rev1.4 p13; whether PTO shaft is included in this weight is not stated | Published mismatch57 PTO hp exceeds the published 45 hp range. |
| Woodland Mills WC46 →587 lb · Product weight, 2024 operator manual Rev C p9 | Published mismatch57 PTO hp exceeds the published 30 hp range. |
| Woodland Mills WC68 →747 lb · Product weight, 2024 operator manual Rev C p9 | Published mismatch57 PTO hp exceeds the published 50 hp range. |
| Woodland Mills TFG55 PTO →346 lb · Product weight, Rev B manual p9 | Published mismatch57 PTO hp exceeds the published 30 hp range. |
| 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. | Needs specification reviewResolve the conflicting published specifications for the exact model revision. |
| 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. |
| 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. |
| 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. |
| 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. |
| 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. | Published mismatch57 PTO hp exceeds the published 45 hp range. |
| 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. | Published mismatch57 PTO hp exceeds the published 45 hp range. |
| 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 mismatch65 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. | Published mismatch65 engine hp exceeds the published 55 hp range. |
| 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. | Needs specification reviewConfirm the correct attachment and driveline configuration for the tractor’s PTO speed; listed speed options are discrete settings. |
| 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 mismatch65 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. | Published mismatch65 engine hp exceeds the published 55 hp range. |
| 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. | Needs specification reviewConfirm the correct attachment and driveline configuration for the tractor’s PTO speed; listed speed options are discrete settings. |
| 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 mismatch65 engine hp is below the 75 hp minimum. |
Is MX-9900’s larger opening and operator-controlled hydrostatic feed useful for the intended wood and power?
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.