SPECIFICATION

3720 & 3820 ParaLink™ Coulter Drills

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 Width
16' (4.88m)
20'5" (6.22 m)
20'5" (6.22 m)
19' 10" (6.04 m)
22'6" (6.86 m)
Transport Height (max)
13' 1" (4m)
15'1" (4.60 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)
 
ParaLink Coulter Drill Specifications
 3720 ParaLink Coulter Drill 3820 ParaLink Coulter Drill 
Opener Row Spacing
7.5" (190 mm), 10" (254 mm), or 12" (305 mm)
7.5" (190 mm), 10" (254 mm), or 12" (305 mm)
Trip Assembly
Independent depth control with in-cab adjustable trip force
Independent depth control with in-cab adjustable trip force
Packing Force
70-230 lb (walking configuration)
100-330 lb (locked configuration)
90-180 lb
Opener Depth Adjustment
Pin-style, ¼" increments (4" total adjustment)
Slot-style, ¼" increments (3½" total adjustment)
Packer Options
4½" semi-pneumatic double shoulder
4½" semi-pneumatic double offset shoulder
4½ semi-pneumatic V style
4½ semi-pneumatic double offset shoulder
Cleaner/Guage Wheel Options
3" wide spoked wheel
4½" wide spoked wheel
3" wide spoked wheel
4½" wide spoked wheel
Air Kits
Single-shoot or double shoot
Single-shoot or double shoot
Blockage Monitors
Optical blockage monitors available in single run (1 per manifold)
Optical blockage monitors available in single run (1 per manifold) 
Row to Row Spacing
66"
66"
Hitch Options
Category 4 standard hitch, Category 4 Ball and Socket hitch, or Category 5 Ball & Socket hitch
Category 4 standard hitch, Category 4 Ball and Socket hitch, or Category 5 Ball & Socket hitch
Safety Chain and Lights
Standard
Standard
Wing Transport Locks
Standard
Standard
Mid Row Banders
Optional MRBIII hydraulically actuated
Optional MRBIII hydraulically actuated
For pulling liquid or NH3 tanks with optional lower hitch pull points
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 standard on all main frames / Hi-Flotation single option available on 3820-60 (Standard on 3820-70)
 
Double walking casters on inner and outer wings / Hi-Flotation single option available on 3720-60 and 3720-70
Double walking casters on inner and outer wings / Hi-Flotation single option available on 3820-60 and 3820-70
Running Gear Options
3720/3820-40 
  • 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.
3720/3820-50 & 3720/3820-60 
  • 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.
3720/3820-50 & 3720/3820-60 
  • 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 steering axle 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 towing 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 steering axle 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.
3720/3820 ICD - 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 3720/3820 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

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