3720 PCD™ Specifications | Bourgault Australia

Model Specifications

The 3720 & 3820 are available in 30, 40, 50, 60 and 70 foot working widths. (9, 12, 15, 18 and 21 metres)

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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 Widths	4.9m	6.2m	6.2m	6m	6.9m
Transport Height (max)	4m	4.6m	4.3m	5.3m	18'7"
HF Center Only Option	N/A	N/A	N/A	Yes	Yes
Weight (lb)**
7.5" sp. w/ MRBs	N/A	17,690	23,586	N/A	N/A
7.5" sp. w/o MRBs	11,476	14,741	19,776	22,226	N/A
10" sp. w/ MRBs	11,884	15,240	20,638	23,133	29,483
10" sp. w/o MRBs	10,024	12,791	17,417	19,413	25,265
12" sp. w/ MRBs	10,840	14,061	19,050	21,318	27,260
12" sp. w/o MRBs	9207	11,884	16,238	18,143	23,586
Add for Center HF (lb)	N/A	N/A	N/A	+2676	Included Above
Add for Full HF (lb)	N/A	N/A	N/A	+3515	+839

** Estimates Only - with standard running gear.

Tyres (Hi-Flotation)

Models	3720-30	3720-40	3720-50	3720-60	3720-70
Main Frame Front	N/A	N/A	N/A	800/65 R32	800/65 R32
Main Frame Rear	N/A	N/A	VF 445/50R22.5	VF 445/50R22.5	VF 445/50R22.5
Wing Front	N/A	N/A	N/A	540/65R24	540/65R24
Wing Rear	N/A	N/A	N/A	IF 320/70R15 Dual wheels	IF 320/70R15 Dual wheels

Tyres (non Hi-Flotation)

Models	3720-30	3720-40	3720-50	3720-60	3720-70
Main Frame Front	IF 280/70R15 Double-walking casters	IF 320/70R15 Double-walking casters	IF 445/50R22.5 Double-walking casters	IF 445/50R22.5 Double-walking casters	N/A
Main Frame Rear	IF 280/70R15 Dual wheels	IF 320/70R15 Dual wheels	IF 320/70R15 Double-walking casters	IF 320/70R15 Double-walking casters	N/A
Wing Front	IF 280/70R15 Single wheels	IF 320/70R15 Double-walking casters	IF 320/70R15 Double-walking casters	IF 320/70R15 Double-walking casters	N/A
Wing Rear	IF 280/70R15 Single wheels	IF 320/70R15 Dual wheels	IF 320/70R15 Dual wheels	IF 320/70R15 Dual wheels	IF 320/70R15 Dual wheels
HF Center Only Option	N/A	N/A	N/A	Yes	Yes

PCD™ General Specifications

3720 & 3820 Paralink Coulter Drills™

General Specifications apply to both 3720 & 3820 ParaLink Coulter Drills™.

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Feature	3720 PCD	3820 PCD
Opener Row Spacing	7.5", 10"or 12" (191mm, 254mm or 305mm)
Hydraulic Lock Option	15" (381mm) , 20" (508mm), or 24" (610mm)
Trip Assembly	Independent depth control with in-cab adjustable trip force
Opener Type	ParaLink™ Walking	ParaLink™ Row
Packing Force (kg)	32 - 104 (walking configuration) 45 - 150 (locked configuration)	41 - 82
Opener Depth Adjustment	Pin-style, 6mm increments (102mm total adjustment)	Slot-style, 6mm increments (89mm total adjustment)
Opener Travel	+230mm/-180mm	+230mm/-280mm
Packer Options	114mm Semi-Pneumatic Double Shoulder 114mm Semi-Pneumatic Double Offset Shoulder	114mm Semi-Pneumatic V-Style 114mm Semi-Pneumatic Double Offset Shoulder
Cleaner/Gauge Wheel Options	76mm wide spoked wheel 114mm wide spoked wheel	76mm wide spoked wheel 114mm wide spoked wheel
Air Kits	Single-shoot or Double-Shoot
Blockage Monitors	Optical blockage monitors available in single run (1 per manifold)
Row to Row Spacing	66" (1.7m)
Hitch Options	Category 4 standard hitch, Category 4 Ball and Socket hitch, or Category 5 Ball & Socket hitch
Safety Chain and Lights	Standard
Wing Transport Locks	Standard
MRBs^®	Optional MRB® III, hydraulically actuated
Rear Drop Hitch	For pulling liquid or NH₃ tanks with optional lower hitch pull points

Hydraulic Requirements

3720 & 3820 Paralink Coulter Drills™

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
7.5" spacing w/o MRB	18	30
10" spacing with MRB	20	30
10" spacing w/o MRB	15	22
12" spacing with MRB	18	25
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 & 3820 ParaLink Coulter Drills™ have 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 Cart - Hydraulic Requirements

When determining the hydraulic demand of a seeding system, it is critical to include the air cart requirements.

	8000 Series Air Cart Specifications
	9000 Series Air Cart Specifications

Specifications3720 ParaLink Coulter Drill™