John Deere 9900 Self-Propelled Forage Harvester

  • 956 hp, 24L Liebherr V12 engine
  • Driveline designed to deliver optimal crop flow when the engine is operating in its efficiency sweet spot
  • The ProStream crop flow designed with extra heavy-duty components for high horsepower and more throughput than ever before


+ High-capacity feeding supports high silage quality

+ Low engine speed concept

+ Kernel processing

+ Dura Line™ components

+ Detect dry matter, sugar, starch, and more with intelligent HarvestLab™ 3000 sensor

Key Specs

Maximum power at 1800 rpm713 kW
970 PS / 956 hp
Exhaust emission regulation compliancy: Tier 4 Final / Stage V
24.2 L
1476.8 cu in.
D9512 A7 04
V 12
Fuel systemCommon rail plus four valves
Fuel tank capacity1,500 L
396.3 U.S. gal.

Engine power

Maximum power at 1800 rpm713 kW
970 PS / 956 hp
Maximum power at 1900 rpm
Rated power at 2100 rpm
Fuel tank capacity1500 L
396.3 U.S. gal.


ModelD9512 A7 04
Displacement24.2 L
1476.8 cu in.
CylindersV 12
Fuel systemCommon rail plus four valves

Cooling system

Cooling system capacity130 L
34.34 U.S. gal.
Cooling fan driveDirect


Ground driveProdrive™, autoshift transmission, differential lock (automatic and manual), automatic wet brake system
Engine rpm on road: 1400-1800 rpm
HydraulicsLoad sensing
Crop harvesting unitHarvest channel wide
Crop flow componentsLow-friction crop-flow concept
Main clutchDry clutch
Number of discsTwo discs
Main drivebandReinforced with Kevlar inserts
Belt tensioningActive, hydraulic pressure
Main driveband, polybelt beltsNine ribs

Electrical system/Electrical and hydraulic system

Type/voltage12 / 24 V
Batteries/battery quantity/capacity3 x 174 amp-hr
Alternator12 V - 200 amp
24 V - 140 amp
Hydraulic system capacity50 L
13.2 U.S. gal.

Ground drive

Differential lockManual and automatic
Maximum transport speedProDrive transmission: 20 / 25 / 30 / 40 km/h
Rear axle typeHydro-mechanical 4WD
Automatic wet brake systemStandard
Engine rpm - ManagementOptional


Tilt and extend steering columnStandard
Air conditioning and heaterStandard - ClimaTrak
Cool boxOptional
Trainee seatStandard
Hectare counterStandard
Operator information systemCornerpost display
CAN-BUS electronicsStandard
Operator's seatAir-suspension seat optional
Side window wiperRear and side window wiper optional
Parallel-type windscreen wiper
Electric adjust and heatedOptional on rear view mirrors
Rear view mirrorsStandard

Machine management solutions

Yield monitoringHarvest Monitor™ optional
DocumentationHarvest Doc™ optional
Crop analysisHarvestLab™ optional
Length-of-cut control based on crop parameterInfinitely variable length-of-cut (IVLOC™) standard
AutoLOC optional - use with HarvestLab
Satellite (GPS) assisted steeringAutoTrac™ optional

Crop-harvesting units

Header height controlAdvanced header control (AHC) optional
Grass pick-ups3.0, 4.0, 4.5 m
9.8, 13.1, 14.8 ft
Maize or corn headers

Harvest channel


Length of cut

Range40 knives: 7-25 mm (0.275-1.0 in.) LOC / 1 mm (0.04 in.) steps / 1170 rpm
48 knives: 6-21 mm (0.24-0.83 in.) LOC / 1 mm (0.04 in.) steps/ 1170 rpm
56 knives: 4-18 mm (0.20 - 0.71 in.) LOC / 1 mm (0.04 in.) steps / 1170 rpm
56 knives: 4-16 mm (0.16 - 0.63 in.) LOC / 1 mm (0.04 in.) steps / 1350 rpm
64 knives: 3-14 mm (0.12 - 0.63 in.) LOC / 1 mm (0.04 in.) steps / 1350 rpm
64 knives: 3-16 mm (0.12 - 0.71 in.) LOC / 1 mm (0.04 in.) steps / 1170 rpm

Feeding system/Feedrolls

Feed roll frame openingSwing away, 37-45 degree (angle)
Metal detectorStandard
Stone detector is optional
Width, front830 mm
32.7 in.
Standard feed roll driveHydro feedroll drive IVLOC standard
Infinitely header drive speed standard
Optional feed roll drive


Knife drum width850 mm
33.5 in.
Knife drum diameter670 mm
26.3 in.
Speed at rated engine speedStandard - 1170 rpm
Optional - 1350 rpm
Knife types available (crop)Straight - grass
Curved - corn
Number of knives40 - 48 - 56 - 64

Knife sharpening system

Reverse rotationYes
Automatic from cabYes, remote from cab
Reverse driveStandard
Reverse speed

Kernel processor

TypeJohn Deere Premium KP, John Deere XStream KP
Quick-changeQuick kernel processor - swing in/swing out

Serrated roller (kernel processor)

Maize, roll teeth number (speed differential)110 / 145 - 50 percent (John Deere XStream KP)
Wholecrop, roll teeth number (speed differential)145 / 165 - 50 percent (John Deere XStream KP)
Sorghum, roll teeth number (speed differential)238 - 32 (John Deere XStream KP)

Disk type (kernel processor)

Number of disks (top/bottom)
Diameter of disks250 mm

Blower/Crop accelerator

Number of blades10


Rotation, degrees210 degree (angle)
Hydraulic height positionHydraulic raise and lower standard
Automatic spout positioning optional
Double-cap deflectionStandard
Number of wear liners


Rotary radiator screen cleanerStandard
Automatic lubrication systemAutoLube optional
Engine oil and filter change duration1000 hours


With front tires710/70R42
With rear tires620/60R30
Transport length (without header)6.6 m
21.7 ft
Transport width (without header)3.1-3.7 m
10.2-12.1 ft
Transport height (to cab roof)3.89 m
12.75 ft
Working height (maximum)Height to spout: 6.60 m
21.65 ft
Approximate weight (without header)

Propelling drive

StandardProdrive autoshift transmission


TypeProdrive autoshift transmission
Hydro-mechanical rear axle optional

Additional information

Date collected