• Low profile 100mm x 100mm main frame
  • Available with either, hydraulic tyne assemblies
  • Optional in-cab digital tyne breakout pressure gauge
  • New folding configuration; four individual cylinders
  • Sowing spacings, from 200mm (8”), Double disc openers from 254mm (10”)
  • Revised hydraulic loading system
  • 800H hydraulic tyne assembly
  • Narrow & standard centre models are available

Main Frame

The main frame includes 5 row 100mm x 100mm mounting ranks, of which front and rear centre section beams are 9mm for additional strength. The new low profile design frame allows easier fitment of air kits and other bolt–on accessories.

Hydraulic Loading

Larger models are standard with a 20 litre gas accumulator. This provides protection from pressure overload during working. In-line valves, fitted to the hydraulic circuitry, assist in controlling the recoil speed and force of the tynes as they return to the work position. A digital tyne breakout pressure gauge, fitted in the tractor cab, is an option.

Wing Fold System

Four 4”x30” folding cylinders are standard equipment – one on each hinge point.

Simple Leveling Adjustment

Two double acting lift cylinders fitted to the centre section are mechanically linked to the wings. There are no phasing cylinders. To level the machine front to rear, the castor linkages are adjusted and for ‘across the width’ levelling, the inner layshaft links control the centre to the wings.

New 800HL Tyne Assembly

The new re-engineered tyne assembly is easier to fit and does not add unnecessary additional weight to the machine. Also, servicing of the cylinder is a much simpler operation. The downward pressure can be adjusted to more than 205kg (450lb) and the tyne has an extra-large under-frame clearance of 800mm (31.5”). The assembly has the facility for locking tynes in the raised position, which is ideal when sowing on alternate rows. The tyne foot has two 1/2” bolts at 1 3/4” centres, which accepts a wide range of ground engaging tools.

Optional 1000lb Hydraulic Tyne Assembly

The John Shearer 1000lb Hydraulic Tyne Assembly, as fitted to the Shearer Trashworker, is an option on the single fold models. This assembly which can be adjusted ‘on the go’ up to tyne breakout force of 455kg (1000lb) features, 35mm diameter hardened pivot pin & bushes and a 50mm x 32mm (2”x 1 1/4”) section H.T. silicon manganese high carbon steel tyne. Each tyne is loaded by a 44.5mm (1 3/4”) diameter jump cylinder. Available on 10″ and above spacing.


Model Type Sowing Rows Width Row Spacing
1600USB300 Single Fold 16 4.83m (15’10” ) 305mm (12”)
2900USB300 Single Fold 29 8.89m (29’2”) 305mm (12”)
3500USB300 Single Fold 35 10.92m (35’10”) 305mm (12”)
4200USB300 Single Fold 41 12.95m (42’6”) 305mm (12”)
1600USB250 Single Fold 19 4.83m (15’10” ) 254mm (10”)
2900USB250 Single Fold 35 8.89m (29’2”) 254mm (10”)
3500USB250 Single Fold 43 10.92m (35’10”) 254mm (10”)
4200USB250 Single Fold 51 12.95m (42’6”) 254mm (10”)
1600USB230 Single Fold 21 4.83m (15’10” ) 230mm (9”)
2900USB230 Single Fold 39 8.89m (29’2”) 230mm (9”)
3500USB230 Single Fold 47 10.92m (35’10”) 230mm (9”)
4200USB230 Single Fold 55 12.95m (42’6”) 230mm (9”)
1600USB200 Single Fold 23 4.83m (15’10” ) 200mm (8”)
2900USB200 Single Fold 43 8.89m (29’2”) 200mm (8”)
3500USB200 Single Fold 53 10.92m (35’10”) 200mm (8”)
4200USB200 Single Fold 63 12.95m (42’6”) 200mm (8”)
3900NSB300 Single Fold, Narrow Centre 39 11.94m (39’2”) 305mm (12”)
3200NSB300 Single Fold, Narrow Centre 31 9.91m (32’6”) 305mm (12”)
2500NSB300 Single Fold, Narrow Centre 25 7.87m (25’10”) 305mm (12”)
3900NSB250 Single Fold, Narrow Centre 47 11.94m (39’2”) 254mm (10”)
3200NSB250 Single Fold, Narrow Centre 39 9.91m (32’6”) 254mm (10”)
2500NSB250 Single Fold, Narrow Centre 31 7.87m (25’10”) 254mm (10”)
3900NSB230 Single Fold, Narrow Centre 51 11.94m (39’2”) 230mm (9”)
3200NSB230 Single Fold, Narrow Centre 43 9.91m (32’6”) 230mm (9”)
2500NSB230 Single Fold, Narrow Centre 35 7.87m (25’10”) 230mm (9”)
3900NSB200 Single Fold, Narrow Centre 59 11.94m (39’2”) 200mm (8”)
3200NSB200 Single Fold, Narrow Centre 49 9.91m (32’6”) 200mm (8”)
2500NSB200 Single Fold, Narrow Centre 39 7.87m (25’10”) 200mm (8”)
5000USB300 Dual Fold 51 15.24m (50’) 305mm (12”)
5500USB300 Dual Fold 55 16.76m (55’) 305mm (12”)
6000USB300 Dual Fold 61 18.23m (60’) 305mm (12”)
5000USB250 Dual Fold 61 15.24m (50’) 254mm (10”)
5500USB250 Dual Fold 67 16.76m (55’) 254mm (10”)
6000USB250 Dual Fold 73 18.23m (60’) 254mm (10”)
5000USB230 Dual Fold 67 15.24m (50’) 230mm (9”)
5500USB230 Dual Fold 73 16.76m (55’) 230mm (9”)
6000USB230 Dual Fold 81 18.23m (60’) 230mm (9”)

Options and Accessories

Part Number Description For Model
39846 2 Tyne Extension Standard/Narrow Single Fold
46710 4 Tyne Extension Standard/Narrow Single Fold
39813 6 Tyne Extension Standard/Narrow Single Fold
39822 Additional 10 litre Accumulator All
46582 In cab digital tyne breakout pressure gauge All
46701 ‘Lug’ 11.5/80-15.3 x12 ply for castor and wing wheels, in lieu of Rib All
46705 Straight adjustable tyne option All
Spring tooth harrows All
800HL Hydraulic Tyne Assemblies All
Spring Tyne Assemblies All
1000lb Hydraulic Tyne Assembly Standard/Narrow Single Fold


Single Fold Standard Centre Models 1600 2900 3500 4200
Working Width 5m (16’3”) 8.9m (29’5”) 10.8m (35’6”) 12.6m (41 ‘6”)
Transport Width 6.0m (19’8”) 6.0m (19’8”) 6.0m (19’8”) 6.0m (19’8”)
Transport Height 3.8m (12’6”) to 5.6m (18’6”)
Single Fold Narrow Centre Models 2500 3200 3900
Working Width 8m (26’5”) 9.9m (32’2”) 11.7m (38’)
Transport Width 5.1m (16’6”) 5.1m (16’6”) 5.1m (16’6”)
Transport Height 3.8m (12’6”) to 5.6m (18’6”)
Double Fold Models 5000 5500 6000
Working Width 15.24m (50’) 16.76m (55’) 18.23m (60’)
Transport Width 6.0m (19.7”) 6.0m (19.7”) 6.0m (19.7”)
Transport Height 4.6m (15’1”) 4.6m (15’1”) 5.5m (18’)
All Models
Hitch Fully floating, 5.2m (17’) long
Transport Clearance Under sweeps 250mm (10”)
Row Spacing Options 200mm (8”) (Single Fold only), 230mm (9”), 250mm (10’), 305mm (12”), 333mm (13.1”)
Depth Control Centre section rockshaft with tandem cylinders mechanically linked to inner wing wheels & ‘phased’ to outer wing wheels
Sowing Ranks 5 mounting beams
Spacing between ranks 705mm between 1&2, 765mm between all others
Underframe Clearance 800m (31 1/2”)
Tyne Assemblies 800HL, edge-on 50mm x 25mm (2”x1”) section, heat treated silicon manganese or High carbon steel—hydraulic or spring release. Tyne foot: 2 x 1/2” bolts at 1 3/4” centres.
Jumper Circuit (Hydraulic) 20 litre Gas Accumulator, in line valves to control tyne re-coil speed & force
Tyne Breakout Adjustable to more than 205kg (450lb)
Tyne mount 100mm (4”) Square RHS.
Tyne jump height 580mm (21”)
Depth Control Centre section rockshaft with tandem cylinders mechanically linked to wing wheels.
Wing Fold Two pair (single fold) or four pair (dual fold) of 4”x30” fold/unfold cylinders
Wheel Equipment (Single Fold) Centre section: 16/70 x 20 x 14 ply ‘sure grip’ Wings & front castors: 12.5/80×15.3 x14ply ‘lug’
Wheel Equipment (Dual Fold) Centre section: (2x) 14.00 x 20 x 22ply, MRF Musclerok inner wings / outer wings & front castors: (12x) 12.5 x 15.3 x 14ply