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Model Specifications


3720 & 3820 general 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 3720/3820-30 3720/3820-40 3720/3820-50 3720/3820-60 3720/3820-70
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"
Tires (Hi-Flotation)
     Main Frame Front N/A N/A N/A 800/65 R32 (2) 800/65 R32 (2)
     Main Frame Rear N/A N/A 16.5x16.1FI (4) 16.5x16.1FI (4) 16.5x16.1FI (4)
     Inner Wing Front N/A N/A N/A 540/65 R24 (4) 540/65 R24 (4)
     Inner Wing Rear N/A N/A N/A 16.5x16.1FI (4) 16.5x16.1FI (4)
     Outer Wing Front N/A N/A N/A 540/65 R24 (4) 540/65 R24 (4)
     Outer Wing Rear N/A N/A N/A 16.5x16.1FI (4) 16.5x16.1FI (4)
Tires, Non Hi Flotation Option
   Main Frame Front 13.5x15FI (4) 13.5x15FI (4) 16.5x16.1FI (4) 16.5x16.1FI (4) N/A
   Main Frame Rear 13.5x15FI (2) 13.5x15FI (4) 13.5x15FI (4) 13.5x15FI (4) N/A
   Inner Wing Front 11.5x15FI (2) 13.5x15FI (4) 13.5x15FI (4) 13.5x15FI (4) N/A
     Inner Wing Rear 11.5x15FI (2) 13.5x15FI (4) 13.5x15FI (4) 13.5x15FI (4) N/A
     Outer Wing Front N/A N/A 13.5x15FI (4) 13.5x15FI (4) N/A
     Outer Wing Rear N/A N/A 13.5x15FI (4) 13.5x15FI (4) N/A
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.

 

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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
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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 8000 Series Air Cart Specifications
9000 Series Air Cart Specifications 9000 Series Air Cart Specifications
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