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John Deere FM4012
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FM4012
Grooming Mowers
Overview:
The John Deere FM4012 Flex-Wing Grooming Mower delivers superior cutting performance and unmatched durability, making it the ideal choice for maintaining large lawns and sports fields with precision and efficiency.
- Rear Chain Shield
- Hydraulic Wing Latch Release Kit
- Light Bar Kit for Transport
- Front and Rear Anti-Scalp Deck Wheel Kits
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Features
Hydraulic Wing Deck Locks

The FM4012 has hydraulic lifts for the wing and rear decks to automatically lock them in the up position for transport. It uses a single acting cylinder, requiring only one tractor rear SCV.
Deck Baffling for Quality Cut

Deck baffling around the blade ensures optimum cut quality. The FM4012 deck depth with baffling around the blades ensures exceptional material distribution and a higher quality of cut.
Caster Wheels for Uniform Cut

By having four caster wheels per deck, this mower follows ground contours with ease. Tubular caster wheel arms are bolted to rail supports for added durability.
Specifications
Deck
| Deck Thickness, Gauge | 0.1345 in. |
| Deck Thickness, Gauge | 3.416 mm |
| Deck Thickness, Gauge | 10 gauge |
| Deck Overlap | 6 in. |
| Deck Overlap | 15.2 cm |
| Lift Cylinders | 3x10 in. |
| Lift Cylinders | 7.6x25.4 cm |
| Wing Travel, Degrees | Up 20 degree (angle) and down 15 degree (angle) |
| Discharge Type | Rear |
Blade
| Average Blade Tip Speed | 16200 fpm |
| Average Blade Tip Speed | 4938 m/min |
| Blade Spindle Quantity | Nine |
| Blade Spindle Type | Cast iron |
| Blade Spindle Bearings | Greaseable ball |
| Blade Overlap | 1.5 in. |
| Blade Overlap | 3.8 cm |
| Blade Dimensions, Type 1 | 0.25x2.5 in. |
| Blade Dimensions, Type 1 | 0.6x6.4 cm |
| Blade Composition | Heat-treated alloy steel |
| Blade Tip Speed | 17,900 ft./min (Center Deck) / 18,200 ft./min (wing decks) |
| Number Of Blades | 9 |
| Blade Spindles | Ductile iron, lubed for life; sealed, ball bearing |
Weight
| Operating Weight | 1999 lb. |
| Shipping Weight | 2005 lb. |
| Shipping Weight | 909 kg |
| Operating Tongue Weight | 218 lb. |
| Transport Tongue Weight | 384 lb. |
Drive
| Drive Type | Gearbox over V-belt |
| Wing Driveline | Category 3 |
| Input Driveline | Category 3 CV |
Warranty
| Machine Warranty | 1 year |
| Gearbox Warranty | 1 year |
| Spindle Warranty | 1 year |
Construction
| Mainframe Construction | 10.2 cm / 4 in. |
Rollers
| Front Roller | Optional |
| Front And Rear Anti-Scalping Roller | Option (field installed) |
Dimensions
| Working Width | 12 ft |
| Working Length | 11.7 ft |
| Transport Dimensions (Lxwxh): | 11.25 x 7.6 x 10.25 ft |
Hitch
| Hitch Drawbar | Category 1 |
| Hitch Clevis | Floating |
| Hitch Adjustment | 4 positions |
| Hitch Type | Adjustable Clevis |
| Hitch Category (Drawbar) | Category 1 |
| iMatch / Quick Hitch | N/A |
Belts
| Belt Type | B-section, Kevlar |
| Belt Adjustment | Spring-loaded idler |
Caster Wheels
| Caster Wheels Quantity | 10 |
| Caster Wheels Type | Solid |
| Caster Wheels Size | 10x4 |
| Caster Wheels Size | 25.4x10.2 |
| Caster Wheels Bearings | Powder metal bushing |
Tractor Requirements
| PTO Speed | 540 rpm |
| PTO Power Range | 25-60 hp |
Setup Time
| Setup Time Labor Hours | 1.25 hr |
Lighting and Safety
| Transport Lights | Optional |
| Rear Chain Shields | Optional |
| Auto-Engage Transport Latch | Optional |
| Markings | Slow-moving vehicle |
Gauge Wheels
| Gauge Wheels Size | 8x3.5 in. |
| Gauge Wheels Quantity | 10 |
| Gauge Wheels Type | Solid rubber |
Cutting Width
| Cutting Width Total | 12 ft |
| Cutting Width Total | 3.6 m |
| Cutting Width Center Deck | 60 ft |
| Cutting Width Wing Deck | 48 ft |
Cutting Height
| Cutting Height Range | 1-4.5 in. |
| Cutting Height Range | 2.5-11.4 cm |
| Cutting Height Adjustment | .5 increments (spacer) |
Ground Pressure
| Ground Pressure | 5 pounds per square inch |
Gearbox
| Gearbox Ratio | 1:2.5, 1:1.92 |
| Mower Deck Gearbox Power | 30 hp |
Tires
| Transport Tires | 20X8-10 |
Contact Us
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325 Walt Messick Road
Harrington, Delaware 19952
Phone: (302) 398-3729
Toll Free: (800) 237-1272