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3720
Overview
3720 INDEPENDENT COULTER DRILL
ADVANCED INDEPENDENT COULTER TECHNOLOGY
 
Realize Really Big Productivity & Superior Field Finish
 
Bourgault sets the standard in today’s marketplace with the two-row Bourgault 3720 Independent Coulter Drill.  Available from 30 to 70 foot working widths, and row spacing options of 7½, 10 and 12 inches, farmers now can configure a system to achieve unprecedented seeding efficiency for their operation.
 
Parallel Walking Coulter Arm Assembly - This advanced 1:1 parallel link design ensures accurate seed placement for many trouble-free seasons.

 
Contour-Ability & Consistency - Achieve consistent seeding depth in rolling land with a 1:1 parallel link design with minimal sensitivity to debris and existing seed furrows.
INCREASE Your Efficiency - The 3720 ICD is available in unit widths from 30 feet (9.1m) up to 70 feet (21.3 m)!


Hi-Flotation Option
Centre Hi-Flotation option provides 800/65R32 front tires & 16.5L rear tires on Main Frame only, and is available for 3720-60 & standard on 3720-70 units.

 
Full Hi-Flotation option provides 800/65R32 on the front of the main frame and 540/65R24 on the front of the wings, and 16.5L rear tires on the main frame, and is available for 3720-60 & 3720-70 units.
More information regarding running gear on the Specifications Page.

 
Variety of Spacing Options - The 2-row Bourgault 3720 Independent Coulter Drill is offered at 7½" (190 mm), 10" (254 mm) and 12" (305 mm) spacings, with the flexibility of a row-crop spacing on the 7½" (190 mm) and 10" (254 mm) spaced models.
On-The-Fly Hydraulic Control - The Model 405 Control Box provides precise electric-over-hydraulic control so you can make adjustments as your conditions change.

 
Low Disturbance Seed Boot Scraper - The low disturbance seed boot scraper creates minimal disturbance to ensure precise seed placement and maximize moisture retention.

 
Winged Seedboot Scraper  - Available on 12” (305 mm) spacing only.
Choice Of Packer & Cleaner Wheels - You can configure the 3720 ICD for your specific requirements.
Series III Mid Row Banders - Achieve the best possible returns by placing your nitrogen fertilizer in the optimal location when one-pass seeding.
 
 
3720 Independent Coulter Drill Specifications
Models
3720-30
3720-40
3720-50
3720-60
3720-70
No. of Sections
3
3
5
5
5
No. of Rows
2
2
2
2
2
Transport Width
16' (4.88m)
19' 10" (6.04 m)
20'5" (6.22 m)
20'0" (6.1 m)
22'6" (6.86 m)
Transport Height (max)
13' 1" (4m)
15'3" (4.65 m)
14'0" (4.27 m)
17'5" (5.31 m)
18'7" (5.66 m)
Weight
7.5" (190 mm) sp. w/ MRBs
-
39,000 lb (17,700 kg)
52,000 lb (23,600 kg)
-
-
7.5" (190 mm) sp. w/o MRBs
25,300 lb (11,475 kg)
32,500 lb (14,750 kg)
43,600 lb (19,800 kg)
49,000 lb (22,250 kg)
-
10" (254 mm) sp. w/ MRBs
26,200 lb (11,885 kg)
33,600 lb (15,250 kg)
45,500 lb (20,650 kg)
51,000 lb (23,150 kg)
65,000 lb (29,500 kg)
10" (254 mm) sp. w/o MRBs
22,100 lb (10,025 kg)
28,200 lb (12,800 kg)
38,400 lb (17,450 kg)
42,800 lb (19,450 kg)
55,700 lb (25,300 kg)
12" (305 mm) sp. w/ MRBs
23,900 lb (10,840 kg)
31,000 lb (14,100 kg)
42,000 lb (19,100 kg)
47,000 lb (21,350 kg)
60,100 lb (27,300 kg)
12" (305 mm) sp. w/o MRBs
20,300 lb (9,210 kg)
26,200 lb (12,000 kg)
35,800 lb (16,300 kg)
40,000 lb (18,144 kg)
52,000 lb (23,600 kg)
Weight with HF
Add for Center HF
-
-
-
+5,900 lb (2,680 kg)
Included Above
Add for Full HF
-
-
-
+7,750 lb (3,520 kg)
+1,850 lb (840 kg)
 
General Specifications
Opener Row Spacing
7.5" (190 mm), 10" (254 mm), or 12" (305 mm)
Trip Assembly
Independent depth control with in-cab adjustable trip force
Packing Force
70-230 lb (walking configuration)
100-330 lb (locked configuration)
Opener Depth Adjustment
Pin-style, ¼" increments (4" total adjustment)
Packer Options
4½" semi-pneumatic double shoulder
4½" semi-pneumatic double offset shoulder
Cleaner Wheel Options
3" wide wheel
4½" wide semi-pneumatic double offset shoulder
Air Kits
Single-shoot or double shoot
Blockage Monitors
Optical blockage monitors available in single run (1 per manifold) or full run (1 per tertiary line)
Row to Row Spacing
66"
Safety Chain and Lights
Standard
Wing Transport Locks
Standard
Mid Row Banders
Optional MRBIII hydraulically actuated
Row Cropping
15" w/ 7.5", 20" w/ 10" Configuration (optional)
Rear Drop Hitch
For pulling liquid or NH3 tanks with optional lower hitch pull points
Front Caster Wheels
Double walking casters standard on all main frames / Hi-Flotation single option available on 3720-60 (Standard on 3720-70)
 
Double walking casters on inner and outer wings / Hi-Flotation single option available on 3720-60 and 3720-70
Running Gear Options
13.5x15FI Dual Caster - Mainframe, 13.5x15FI Dual Caster - Wings, 13.5L Rear Tires (3720-40 only)
 
13.5x15FI dual walking caster wheels on the mainframe, 13.5x15FI dual walking caster wheels on the inner and outer wings and dual 13.5L rear wheels.
16.5x16.1FI Dual Caster - Mainframe, 13.5x15FI Dual Caster - Wings, 13.5L Rear Tires (3720-50 & 3720-60 only)
 
16.5x16.1FI dual walking caster wheels on the mainframe, 13.5x15FI dual walking caster wheels on the inner and outer wings and dual 13.5L rear wheels.
This tire option is best suited for general conditions and extremely wet seeding conditions are rare.
16.5x16.1FI Dual Caster - Mainframe, 13.5x15FI Dual Caster - Wings, 16.5L Rear Tires MF Only (3720-50 & 3720-60 only)
 
16.5x16.1FI dual walking caster wheels on the mainframe, 13.5x15FI dual walking caster wheels on the inner and outer wings, and dual 16.5L rear wheels on mainframe, and dual 13.5L rear wheels on the wings.
This tire option is the same as the first, with the exception of 16.5x16.1 FI dual wheels are used on the rear mainframe.
CENTER HI-FLOTATION (HF)
Hi-Flotation - 800/65R32 Mainframe Only, 16.5L Rear Tires MF Only (3720-60 & 3720-70 only)
 
800/65R32 single caster wheels on the mainframe, 13.5x15FI dual walking caster wheels on the inner and outer wings, dual 16.5L rear wheels on mainframe, and dual 13.5L rear wheels on the wings.
This tire option has benefits in wetter conditions and excellent stability and following characteristics in transport.
FULL HI-FLOTATION (HF)
Full Hi-Flotation - 800/65R32 Mainframe and 540/65R24 Wings, 16.5L Rear Tires (3720-60 & 3720-70 only)
 
800/65R32 single caster wheels on the mainframe, 540/65R24 single caster wheels on the inner and outer wings, and dual 16.5L rear wheels on mainframe, and 13.5 dual rear wheels on the wings.
This tire option is ideal for areas where seeding can often be very wet and wheel tracks or getting stuck is a concern.  It also provides excellent stability and following characteristics in transport.
3720 PHD - Hydraulic Requirements

Recommended Flow Requirements:
Hydraulic flow requirements are highest when turning on the headlands. The recommended flow allows the seeding system to be raised and lowered within two headlands. It should be noted that the recommended fan requirements are for the maximum operational speed (RPM) of the fan.
 
Minimum Hydraulic Flow Requirements:
Recommended hydraulic flow should provide minimal fan slowdown during headland turns.  The openers will take hydraulic flow priority over the fans.
If operating at minimum flow requirements, the air seeder fans will drop a minimum of 20% during headland turns.  This may require a 3rd headland to allow the openers time to raise and lower.
In typical operating conditions one or both fans are operating at less than maximum output levels, which will reduce hydraulic requirements.
FLOW REQUIREMENTS
MINIMUM GPM
RECOMMENDED GPM
DEPTH CIRCUIT (7.5" spacing with MRB) 24 30
DEPTH CIRCUIT (7.5" spacing w/o MRB) 18 30
DEPTH CIRCUIT (10" spacing with MRB) 20 30
DEPTH CIRCUIT (10" spacing w/o MRB) 15 22
DEPTH CIRCUIT (12" spacing with MRB) 18 25
DEPTH CIRCUIT (12" spacing w/o MRB) 13 18
 
Pressure Requirements:
With many tractors, maximum hydraulic flow drops off sharply prior to maximum operating pressure. By setting the tractor to a pressure setting of 3100 psi the hydraulic flow will be near the rated output at the maximum operating pressure.
The 3720 Independent Coulter Drill has a minimum and recommended operating pressure of 2500 psi.
Coupler Requirements:
A ½” coupler is only rated for flow rates of 12 gpm.  As flow increases beyond this value, a large pressure drop is created across the couplers which in turn increases pressure requirements. The durability of the ½” couplers can also be compromised when operating at high flow rates.
It is recommended to use ¾” couplers on the tractor and implement, as this will greatly reduce the pressure drops and will increase the flow of oil to the fan or opener cylinders.
Air Seeder - Hydraulic Requirements
Click Here to go to Hydraulic Requirements - Air Seeder Fan Options
Click Here to go to Hydraulic Requirements - 7000 Series Metering System
3720 - Blog