John Deere D400 Hagie™ Self-Propelled Detasseler

Model Photo



Hagie™ D400 Series engines

6.7-L (408.9-cu in.) Cummins® QSB engine
Final Tier 4 (FT4) diesel engineFinal Tier 4 (FT4) diesel engine

The Hagie D400 is powered by a 6.7-L (408.9-cu in.) Cummins QSB emissions-compliant Final Tier 4 (FT4) diesel engine rated at 145- kW (195-hp). This 6.7-L (408.9-cu in.) engine is electronic with an air-to-air cooler and turbocharger.

Engine location
Engine location (FT4 engine shown)Engine location (FT4 engine shown)

The rear-mounted engine keeps constant weight to offset the front attachment and leaves space in the center of machine for the varying weight of the fuel tank. This allows for better coolant airflow and reduction of cab noise.

Engine exhaust
Engine exhaust stackEngine exhaust stack

The engine exhaust is located at the rear of the machine. This helps to reduce interior cab noise and vibration.


Cummins is a trademark of Cummins, Inc. Hagie is a trademark of Hagie Manufacturing Company, LLC and similar to John Deere branded equipment, Deere will also support Hagie equipment.

D400 cab and controls overview

Overhead monitors and controls
Location (image)ComponentDescription/notes
ACourtesy/interior work lightThe courtesy light comes on automatically when the cab door is opened. The interior work light is activated by manually pressing the interior work light switch (located on the light housing).
BStereo (if equipped)The stereo features an AM/FM tuner, weatherband broadcasting, CD player, MP3 player, USB/ iPod® controls, and Bluetooth® wireless system (if equipped).
CClimate controlsThe climate controls allow the operator to set and maintain desired cab temperature. Vents are placed throughout the cab to keep air circulating and to maintain clear windows throughout the cab.
DMachine displayThe machine display is the central control center of the machine. It controls many of the machine’s electronically driven functions (i.e., machine drive, all-wheel steer [AWS], attachment operation, tread adjustment, detasseling systems, lights, diagnostics, etc.).
EMachine gaugesThe machine gauge panel on the A-post is conveniently located for viewing engine rpm, fuel level, engine coolant temperature, and engine aftertreatment level (if equipped).


Side console
Location (image)ComponentDescription/notes
AEmergency stop (e-stop) switchThe e-stop switch provides a quick method for stopping the engine in an emergency situation.
B4-1/ to 4-2 Ddetasseler toolbar slide switch (if equipped)Provides adjustment of the toolbar from 4-1 to 4-2 row configurations if equipped
CTraction valve switchEnables the machine traction control system for 30 seconds
DIgnition switchEngages engine starter to start the machine
EPower mirror switch (if equipped)The power mirror switch allows vertical or horizontal adjustment of the electric side- view mirrors by pressing the switch in the desired position.
FHydrostatic drive control handleThe hydrostatic drive control handle controls the direction of the machine and the speed in which it travels. It is also used to control the toolbar, master control, end row management, and shift up/down speeds.
GAll up/down switchAll up/down switch is used to raise or lower all row units at the same time.
HMain control switchControls the on/off state of the detasseling motors
IEnd row management switchThe end-row management switch is a programmable switch that enables various functions (i.e., all-wheel steerAWS, auto steer, master control) when the switch is depressed. End-row management settings are programmed through the machine display.
JShift up switchThe shift up/down switches are used for speed range selection.
KShift down switchThe shift up/down switches are used for speed range selection.
LParking brake switchThe parking brake switch is used to engage and disengage the parking brake, as well as extend and retract the ladder.
MThrottle switchThe throttle switch is used to control engine speed (rpm).
N12-V power portsFour power ports are provided for the connection of additional items (such as radios and computer equipment).
OTwo auxiliary audio input connectionsThe auxiliary audio input allows connection of a personal device or MP3 player.
Front console
Location (image)ComponentDescription/notes
ASteering wheelOptional premium leather-wrapped steering wheel
BHazard/warning lights switch---
CHighway running lights switch---
DTurn signal indicatorLeft-hand side
EHighway running lights indicator---
FHigh beams indicator---
GTurn signal indicatorRight-hand side
HSteering wheel telescope adjust handleAvailable only if equipped with this option
ISteering column tilt adjust buttonKnee angle
JSteering column release pedal---
KOperator foot pegs

Two pegs
Available only if equipped with this option

LDeceleration (decel) pedal---
NWindshield washer---
OTurn signal lever---
PWindshield wiper speed---
QHigh beams (brights)---

iPod is a trademark of Apple Inc. Bluetooth is a trademark of Bluetooth SIG, Inc.

Frame and axles

Chassis mainframeChassis mainframe
Horizontal cross-through axle tubeHorizontal cross-through axle tube

The D400 Detasseler mainframe design features horizontal cross-through axle tubes, as well as toolbar and platform mounts on weldment.

  • 360.7-cm (142-in.) mainframe width
  • 182.9-cm (72-in.) ground clearance

Key Specs

Engine Peak rated power
145 kW
195 hp
Detasseling speed range 0.8 to 30 km/h
0.5 to 19 mph
Transport speed, maximum 45 km/h
28 mph
Suspension Independent air-ride
Crop clearance with standard tires 182 cm
72 in.


Peak rated power 145 kW
195 hp
Emissions Final Tier 4 (FT4)
Number of cylinders Six
Displacement 6.7 L
409 cu in.
Alternator 200 amp
Fuel tank capacity 378 L
100 gal.
Diesel exhaust fluid (DEF) tank capacity 18.9 L
5 gal.

Detasseling toolbar

Toolbar outriggers 12-row 340.4 cm
134 in.
8-row 190.5 cm
75 in.
Row configurations 6, 8, 10, or 12
Cutting height Minimum range: 74-238 cm in. cm
32-97 in.
Maximum range: 33-259 cm
13-102 in.
Pulling height Minimum range: 82-246 cm
32-97 in.
Maximum range: 102-266 cm
40-105 in.
Detasseling control system

Detasseling configuration options

Option 1 Quad Puller - 8 Row 4 Lift
Option 2 Quad Puller - 10 Row 4 Lift
Option 3 Quad Puller - 12 Row 6 Lift
Option 4 Cutter - 8 Row 4 Lift
Option 5 Cutter - 10 Row 4 Lift
Option 6 Cutter - 12 Row 6 Lift
Option 7 Quad Puller - 4-1 or 4-2 configuration, 12 Row 6 Lift
Option 8 Cutter - 4-1 or 4-2 configuration, 12 Row 6 Lift
Option 9
Option 10


Type Hydrostatic
Drive Full-time four-wheel drive (4WD)
Shifting Dual range speed control with incremental speed adjustment within each range
Hydraulic reservoir capacity 95 L
25 gal.
Detasseling speed range 0.8 to 30 km/h
0.5 to 19 mph
Transport speed, maximum 45 km/h
28 mph


Dry compatible No
Suspension Independent air-ride
Crop clearance with standard tires 182 cm
72 in.
Front tires 300/85R42 or 320/80R42
Rear tires 300/85R42 or 320/80R42
Flotation tires 380/80R38
Hydraulic tread adjust Optional
Wheel tread spacing 305 to 406 cm
120 to 160 in.
Wheel base 353 cm
139 in.
Turning radius 5.9 m
19.4 ft
Parking brake Integrated in final drives
Primary brakes Drive system dynamic braking
Ladder raise/lower Hydraulic
Approximate dry weight 9,480 kg
20,900 lb

Additional information

Date collected 1-Nov-2018