Gason 1200 Series User manual

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COPYRIGHT
Neither this manual or part thereof may be reproduced or published without the prior permission of A.F. Gason Pty. Ltd.
1200, 1700 & 1800 SERIES AIR SEEDER
OPERATOR’S MANUAL
Fitted with Series 1 Meterbox
Covering the 1220/30/40/50, 1730/50 & 1830/50 Models
GPN 207838 REVISION B 01/23

Page Intentionally Blank

CONTENTS
11/09
Warranty Form
Introduction........................................................
1
General Information...........................................
3
Safety ................................................................
6
Specifications.....................................................
8
Conversions.......................................................
12
Bolt Specifications .............................................
13
Ordering Parts ...................................................
14
Spare Parts Record ...........................................
15
Assembly Instructions........................................
16
Seeder & Implement Hitch Fitment............
16
Distribution System....................................
20
Pre-Delivery Checklist................................
23
Transporting.......................................................
25
Operating the Air Seeder...................................
26
Monitor Operation......................................
27
Ground Drive Model
Monitor Operation......................................
28
Calibration..................................................
30
Method A (simple).............................
30
Method B (preferred).........................
33
Method C (Wheel Circumference).....
34
Calibrating a 3 Bin Seeder ................
36
Variator Setting Guide.......................
37
Calibration Handle Turns...................
52
Area Rate Chart ..............................
53
Converting lb/acre to kg/ha ...............
54
Planting Details Reference................
55
Meter Drive System...........................
57
Variator Gearbox...............................
57
High sprocket Ratio...........................
59
VRT Hydraulic Drive Model
Monitor Operation......................................
60
Monitor Setup ............................................
64
Manual Override ........................................
67
Calibration..................................................
70
Sprocket Selection Guide..................
74
Planting Details Reference................
85
Maintenance ..............................................
87
Trouble Shooting........................................
89
Metering System
4 Outlet Meterbox ......................................
92
Reducing the Outlets............................
93
Low/High Rates....................................
93
Large Seeds Manifold Plate..................
93
Deep Banding.......................................
94
Wide-Row Cropping .............................
94

CONTENTS
11/09
6 Outlet Meterbox.......................................
96
Reducing the Outlets ............................
97
Low/High Rates.....................................
97
Deep Banding.......................................
98
Triple Shooting......................................
98
Partial Diversion....................................
98
Removing Meterewheels............................
100
Fitting Low Rate Sleeves............................
101
Fitting Large Seeds Manifold Plate ............
102
Blocking Air Flow........................................
102
Metering Oats.............................................
103
Hydraulic System...............................................
104
Tractor Requirements.................................
104
Hydraulic Connections ...............................
105
Disconnecting the Hyd. Hoses...................
106
Filter Maintenance......................................
107
Blower Capacity.................................................
108
Blower Speed.............................................
110
Maximum Application Charts......................
112
General Maintenance.........................................
116
Trouble Shooting................................................
119
Optional Attachments.........................................
123
Auger Operation.................................................
124
Storage and Cleaning ........................................
126

INTRODUCTION
Page 1
11/09
A.F. Gason Pty Ltd is an Australian
owned family business operating from within
rural Victoria. The Gason companyhas been
servicing the needs of rural Australians for
more than 60 years. We operate through a
local dealer support network that spans the
country. A.F. Gason’s would like to thank
you for purchasing your Australian made Air
Seeder, and trust that you will have many
years of trouble free service.
The Air Seeder’s have been designed
to be functional, practical and reliable. They
incorporate the latest technology in air
seeder design but retain their basic
functionality to ensure ease of maintenance.
The Gason range of Air Seeders can
perform a variety of seeding operations and
are available in either a front tow (FT), rear
tow (RT) or implement mounted (IM) models.
There are a number of bin capacities
available with either 2 or 3 bin
configurations. A large range of sowing
outlet configurations are available, making
the Air Seeder adaptable to a variety of
implements to perform different tillage
practices.
The Gason Series 1 metering system
is a positive and accurate method of placing
seed and fertilizer into the air stream. The
system is capable of sowing conventionally,
often referred to as single shooting (seed and
fertilizer together), deep banding (separating
the seed and fertilizer) or triple shooting
(handling 3 separate products through to the
implement). The system can also sow
summer and winter crops with minimal
adjustment.
This manual endeavors to provide the
owner with a complete understanding of the
Air Seeder’s operation and the processes
required to obtain the highest level of
performance possible. It is suggested that the
owner/operator read this manual and any
other literature that has been supplied with
your machine to ensure a safe and trouble
free operation.
References to the left and right hand sides of
the Air Seeder are from the rear of the
machine looking forward.
1090t
Fig. 1 1850RT Series Air Seeder (optional rear hitch fitted).
While every effort has been made to ensure the accuracy of the
information in this manual, A. F. Gason Pty Ltd reserves the right
to delete, change or add information without notice.

Introduction
Page 2
11/09
Fig. 2 1230 IM3 Series Air Seeder Mounted on CT2 Implement
Fig. 3 1750RT Series with Optional Auger and Pasture Planter

GENERAL INFORMATION
Page 3
11/09
Introduction
The Air Seeder uses the flow of air to
convey seed and fertilizer to each tine. This
type of material transfer is known as
pneumatic conveyance (refer Fig. G1).
The material being sown must be
metered accurately into the air stream to
deliver a constant application rate.
How the Air Seeder Operates
Seed and fertilizer are transferred from
pressurized bins to multiple conveying tubes
via separate meterboxes. A meterwheel
arrangement inside the meterbox is rotated
by either a ground wheel (ground drive
seeder) or hydraulic motor (VRT equipped
Seeder).
As the ground wheel rotates, so too does
the metering system. The metering system
can be disengaged or engaged at the tractor
cab.
A blower is located upstream of the
meterbox on the Air Seeder. It is used to
produce the airflow required to convey the
material.
The seed and fertilizer is conveyed
towards the implement. It is then evenly
divided into smaller amounts as it passes
through the primary splitters.
The material then travels along the
secondary hoses to the secondary manifold
heads. It is distributed to the tertiary hoses
and transferred to the sowing boots mounted
on the tines.
Fig. G1 Two bin model shown.
1088

General Information
Page 4
11/09
Air Seeder Construction
RT model air seeders trail behind the
implement while the FT models are towed in
front of the implement. The IM models are
mounted onto the drawbar of the implement
and require special bracketry to support the
frame of the seeder. The basic operation of
all of the designs is the same other than the
location of the seeder.
The RT models are supplied with all
components to attach to the rear of the
implement. Some modifications may be
required when fitting to non-Gason
implements but in most cases fitment is a
straight forward operation. The rear tow
models are also available with a rear hitch
system that attaches to the rear of the
seeder, which will allow a set of harrows or
light prickle chain to be towed.
The 1850FT model is fitted with a roller
style rear hitch with which to pull the
implement. This hitch, when left unpinned,
dramatically reduces the load on the seeder
during turning which will help extend the life of
the machine. The trailer has also been
designed to withstand the high loads exerted
on the frame while pulling the implement.
The IM model is supplied with a wheel
speed target that is mounted onto a wheel of
the implement. A standard kit is supplied with
the seeder. In all cases, the seeders have
been designed to allow quick and easy
detachment from the implement and tractor.
The 1200, 1700 and 1830/50 models are
fitted with a sturdy walkway and handrail to
the left-hand side of the machine. A folding
ladder gives access to the walkway and a
separate platform mounted on top of the bins
allows access to the bin lids.
The bins have been made from 2.0 to
2.5mm thick mild steel with folded corners,
which are fully welded, on both internal and
external joints.
Fig.G2 RT Model Air Seeder
shown fitted with
4 outlet meterboxes.

General Information
Page 5
11/09
The bins for all trailed models have
been produced in two halves and are painted
using a high bake enamel to reduce
corrosion both inside and out before joining.
The bin halves are then joined using
structural quality rivets and sealed with high-
grade sealant. The sealant can be replaced
at any time, if required, without splitting the
bins.
The support frame and trailers are built
from 350/450-grade rectangular hollow
section with either side plates or truss
system for stiffening. It has been designed
and tested to reduce the possibility of rearing
if unevenly loaded.
The metering system incorporates
nylon and stainless steel componentry in
areas affected by fertilizer induced
corrosion.
The output of the ground driven
metering system is controlled by a stepless
variable speed gearbox, which can easily be
adjusted. Each meter system has its own
separate adjustment. VRT equipped
seeders use individual hydraulic motors to
control metering rates.
The blower’s hydraulic system uses
quality components and will require minimal
maintenance. The system has been designed
to operate in a harsh environment. It is fitted
with a check valve to prevent damage if
incorrectly connected.
The blower is mounted on the trailer
frame and houses a high capacity impeller. It
has been specifically designed to operate in
the rough conditions that occur during normal
operation. The impeller is directly mounted to
the motor, which means that there are no
external bearings or an external coupling.
Calibrating the ground driven metering
system has been simplified by providing a
chart with instructions to the side of the bin.
There is no need to calculate figures if
calibrating within average application rates.
A collection tray and an accurate scale
set is included with the Air Seeder.
For further information on individual
aspects of the seeder refer to the appropriate
section in this manual.
Fig. G3 Distribution System.
1087

SAFETY
Page 6
11/09
The Air Seeder has been designed with
safety in mind. However, the equipment is
only as safe as the person operating it.
Do not operate the Air Seeder until you
have read and understood this manual. If
you feel you need help or advice on the
operation of the Seeder, contact your local
authorized Gason Dealer.
To ensure trouble free and safe
operation of your seeder, it is important to
carry out a daily safety check to reduce the
possibility of a costly breakdown.
Items to Check Daily During Operation
1. Check all wheel nuts are tight during the
first couple of days of seeding or after
transportation. Refer Bolt Spec. table for
recommended assembly torque.
2. Check all tyre pressures and tyre
conditions in general. NOTE: a badly
worn rear drive tyre will affect the
metering accuracy.
3. Ensure the safety guard on the blower
unit is fitted.
4. Check all hydraulic breakaway
connections are locked into position.
5. Check all hydraulic hoses and fittings for
leaks.
6. Check all chains and sprockets for wear
or movement on the shaft.
7. Check metershafts turn freely before
operating each day or after transporting
when loaded (refer page 58).
8. Check draw bar pins for wear.
9. Ensure bin lids are closed and that there
are no air leaks when blower is operating.
10.Check distribution hoses for damage or
kinks, especially after operating the wing
fold system on the implement.
General Safety Conditions
DO NOT ride on the machine when
operating.
DO NOT touch or attempt to adjust any
moving parts.
DO NOT adjust hydraulic fittings while
under pressure.
DO NOT remove any safety guards while
the seeder is operating.
DO carry out the daily safety checks and
operate the seeder in a safety conscious
manner.
Hydraulics
Before working on the hydraulic system
always check that theblower is not operating,
and that there is no pressure in the hydraulic
system.
Never attempt to disconnect a
breakaway coupling if the blower is operating.
Turn the tractor off if working on the metering
system of a VRT equipped seeder.
Leaving the Air Seeder Unattended
Always close the bin lids and ensure that
no material is left in the bins after seeding.
Chock the Air Seeder wheels to prevent
it from rolling.
When Working on the Air Seeder
Place suitable stands under the trailer if
removing a wheel or carrying out major work.
Never enter the bin compartment
unless another person is present. Always
take proper safeguards if entering a bin or
working on components that have been
exposed to treated seed.
Wear ear protection if working near the
blower while operating.

Safety
Page 7
11/09
Transporting
Never transport the seeder with the
clutch switch engaged.
Avoid transporting the seeder long
distances when loaded. Do not exceed
15km/h when towing the seeder when
loaded. Maximum speed for towing an
empty seeder is 40km/h.
For further information and helpful tips
on transporting refer to the Transporting
section of this manual.
Fig. G4 1220 IM3 with the CT implement with optional Pasture Planter

SPECIFICATIONS –1220/30/40/50
Page 8
01/23
Bin Capacity –3 Bin (Equal Bin)
By volume:
1230 IM3
Front bin
33.3%
1100Lt
Middle bin
33.3%
1100Lt
Rear bin
33.3%
1100Lt
Total capacity
3300Lt
Bin Capacity –3 Bin (Larger Front Bin)
By volume:
1240 IM4
Front bin
42%
1600 Lt
Middle bin
28.9%
1100 Lt
Rear bin
28.9%
1100 Lt
Total capacity
3800 Lt
Refer to page 9 for Hydraulic and Drive
System Specifications.
Dimensions
1220 IM2
1230 IM2
1230 IM3
1240 IM3
1250 IM2
Overall width
1350
1350
1350
1350mm
2160mm
Overall height*
1520
1820
1820
1820mm
2315mm
Top of bin height
1625
1925
1925
1925mm
2010mm
Overall length
2860
2860
3920
3920mm
4170mm
* Overall height not including height of pull. This may vary between
600mm & 1200mm depending mounting implement.
Weights
1220 IM2
1230 IM2
1230 IM3
1240 IM3
1250 IM2
Unloaded
750
780
940
955kg
1395kg
Loaded
2950
3980
4240
4755kg
6520kg
(material in both bins at 1000kg/1000 litres)
Bin Capacity –2 Bin
By volume:
1220 IM2
1230 IM2
1250 IM2
Front bin
50%
1100
1600
2550Lt
Rear bin
50%
1100
1600
2550Lt
Total capacity
2200
3200
5100Lt
By weight:
Front bin (wheat)
935
1360
2167kg
Rear bin (super)
1276
1856
2958kg
Total weight
2211
3216
5125kg
(wheat = 850kg/1000 litres)
(super = 1160kg/1000 litres)

SPECIFICATIONS –1730/1750
Page 9
08/09
Dimensions
1730RT
1750RT
Overall width
2435
2540mm
Overall height*
2775
2840mm
Top of bin height
2150
2550mm
Overall length^
8050
8050mm
Seeder length
6630
6630mm
Rear wheel centres
2000
2010mm
Step height
630
660mm
Ground Clearance
420
460mm
*Worklight stand folded down. ^Includes hitch but no options.
Weights*
1730RT
1750RT
Unloaded
1760
1850kg
Loaded
5160
6950kg
(material in both bins at 1000kg/1000 litres)
*Weights are for 2 bin models only and excludes Auger and options.
Bin Capacity –2 Bin
By volume:
1730RT
1750RT
Front bin
50%
1700
2550Lt
Rear bin
50%
1700
2550Lt
Total capacity
3400
5100Lt
By weight:
Front bin (wheat)
1445
2167kg
Rear bin (super)
1972
2958kg
Total weight
3417
5125kg
(wheat = 850kg/1000 litres)
(super = 1160kg/1000 litres)
Bin Capacity –3 Bin (Equal Front/Middle Bin)
By volume:
1730RT
1750RT
Front bin
26.7%
-
1415Lt
Middle bin
25.3%
-
1345Lt
Rear bin
48%
-
2550Lt
Total capacity
-
5310Lt
Bin Capacity –3 Bin (Larger Front Bin)
By volume:
1730RT
1750RT
Front bin
29.1%
-
1545Lt
Middle bin
22.9%
-
1215Lt
Rear bin
48%
-
2550Lt
Total capacity
-
5310Lt
Wheels
Size:
1730RT
1750RT
Rear tyres
14.9-26
18.4-26
Type:
Rear tyres
R1 Gripster
Tyre
Recommended Pressure
KPa
psi
14.9-26 (8pr) Gripster
180
26
18.4-26 (10pr) Gripster
170
25
Hydraulics
Fan Motor type........fixed displacement
........................axial-piston
Connections............pressure inlet/main return
outlet/case drain outlet
Hydraulic capacity...44.3 I/min. @ 4500rpm
(Ground Drive) (4 outlet meterbox)
.............or 54 l/min. @ 4500rpm
(6 outlet meterbox)
Hydraulic capacity…65 I/min. @ 4500rpm
(VRT Hydraulic) (4 outlet meterbox)
or………75 I/min. @ 4500 rpm
(6 outlet meterbox)
Fan Speed control ..pressure compensated flow
control valve
Filter capacity..........100 I/m @ 10 microns
absolute med. viscosity
Maximum case
drain pressure.........5 Bar (72.5 psi)
Maximum motor
pressure..................350 Bar (5075 psi)
Maximum return
line oil temp ............90° C max.
Hydraulic fluid.........Mobil fluid 424 or
equivalent High quality
High VI multigrade
transmission and
hydrostatic tractor oil.
Drive System - (Ground Drive)
Clutch .........................electro-magnetic
Chain .........................½ ASA 40
Sprockets....................Nylon/steel
Bearing lubrication......Mobil HP grease
(general purpose)
Variator –(Ground Drive)
Type ...........................Stepless variable speed
Oil ............................Mobil Delvac 1240 D or
SAE 40 motor oil
Oil capacity.................1.27 litres
(level with centre of top shaft)

SPECIFICATIONS –1830/1850
Page 10
01/06
Dimensions
1830RT
1850RT
1850FT
Overall width
2435
2540
2980mm
Overall width CT model
2760
2760
Overall height*
2775
2840
2840mm
Top of bin height
2150
2550
2550mm
Overall length^
8025
8025
5790mm
Seeder length
4970
4970
5790mm
Rear wheel centres
2000
2010
2500mm
Front wheel centres
(CTC)
2000
2000
-
Step height
630
660
660mm
Ground Clearance
420
460
420mm
*Worklight stand folded down. ^Includes hitch but no options.
Weights*
1830RT
1850RT
1850FT
Unloaded
1760
1850
1950kg
Loaded
5160
6950
7050kg
(material in both bins at 1000kg/1000 litres)
*Weights are for 2 bin models only and excludes Auger and options.
Bin Capacity –2 Bin
By volume:
1830RT
1850RT
1850FT
Front bin
50%
1700
2550
2550Lt
Rear bin
50%
1700
2550
2550Lt
Total capacity
3400
5100
5100Lt
By weight:
Front bin (wheat)
1445
2167
2167kg
Rear bin (super)
1972
2958
2958kg
Total weight
3417
5125
5125kg
(wheat = 850kg/1000 litres)
(super = 1160kg/1000 litres)
Bin Capacity –3 Bin (Equal Front/Middle Bin)
By volume:
1830RT
1850RT
1850FT
Front bin
26.7%
-
1415
1450Lt
Middle bin
25.3%
-
1345
1345Lt
Rear bin
48%
-
2550
2550Lt
Total capacity
-
5310
5310Lt
Bin Capacity –3 Bin (Larger Front Bin)
By volume:
1830RT
1850RT
1850FT
Front bin
29.1%
-
1545
1545Lt
Middle bin
22.9%
-
1215
1215Lt
Rear bin
48%
-
2550
2550Lt
Total capacity
-
5310
5310Lt
Wheels
Size:
1830RT
1850RT
1850FT
Front tyre
(single)
11.5/80-15.3
340/80 R18
- - -
Front tyre
(CTC)
11.5/80-15.3
11.5/80-15.3
- - -
Rear tyres
14.9-26
18.4-26
18.4-26
Type:
Front tyres
Pattern MPT/Radial
Rear tyres
R1 Gripster
Tyre
Recommended Pressure
KPa
psi
11.5/80-15.3 (10pr) single
225
33
11.5/80-15.3 (10pr) dual & CT
170
25
12.5-18 (12pr) single
225
33
340/80 R18 single
225
33
14.9-26 (8pr) Gripster
180
26
18.4-26 (10pr) Gripster
170
25
Refer to page 9 for Hydraulic, Variator and
Drive System Specifications.

SPECIFICATIONS
Page 11
04/04
Fig. S1 1750RT Series Air Seeder
Fig. S2 1850RT Series Air Seeder CT (control traffic) Option.

CONVERSION FORMULAE
Page 12
04/04
Useful Conversions –Formulae
LENGTH:
1 km = 0.621371 mile
1 mile = 1.609344 km
1 m = 3.280840 ft.
1 ft = 0.304800 m
1 mm = 0.039390 inch
1 inch = 25.400 mm
SPEED:
1km/h = 0.625 mph
AREA:
1 ha = 10,000 m2= 2.471054 acres
1 acre = 10 sq. chain = 4840 sq. yd. = 0.404685ha= 4840 sq.
yd. = 0.404685 ha
1 km2= 0.386102 sq. mile
1 sq. mile
= 2.589988 km2
VOLUME:
1 m3 = 35.31476 cu. Ft.
1 cu. ft. = 0.028317 m3
1 L = 0.26418 US gal.
1 US gal.
= 3.78531 L
1 UK gal = 1.201 US gal.
1 UK Bushel = 8.00 UK gal. = 1.2843 cu. Ft.
= 8.00 U.K. gal. = 1.2843 cu. ft.
= 1.2843 cu. ft.
1 L = 0.0274962 UK
Bushels
1 UK Bushel = 36.369 L
1 L = 0.0283785 US Bushels
1 US Bushel = 35.2379 L
TORQUE:
1 Nm = 0.7375624 lbft.
1 lbft. = 1.3558175 Nm
FORCE:
1 lbf = 4.4482 N
1N = 0.22481 lbf
PRESSURE:
1 psi = 6.89476 kPa = 0.0689476 Bar
1 kPa = 0.145038 psi = 0.01 Bar
1 Bar = 14.5 psi
MASS:
1 kg = 2.204622 lb
1 lb = 0.453592 kg
1 kg = 1000 grams
POWER:
1 kW = 1.341 hp
1 hp = 745.7 W
DENSITY:
1 kg/m3
= 0.0624 lb/ft3
1 lb/ft3 = 16.0185 kg/m3
APPLICATION RATE:
1 kg/ha = 0.892 lb/acre
1 lb/acre = 1.121 kg/ha
HYDRAULIC HORSE POWER:

CONVERSION FORMULAE
Page 13
04/04
1 hp = FLOW (US GPM) x PRESSURE (psi)
1714
MASS FLOW RATE:
kg/min = Application Rate (kg/ha) x Area Rate (ha/hour)
60
lb/min = Application Rate (lb/acre) x Acre Rate (acre/hour)
60

BOLT SPECIFICATIONS
Page 14
06/07
STANDARD BOLT HEAD MARKINGS AND TORQUE SPECIFICATIONS:
CAUTION: Loose bolts can cause elongation of holes and part failures resulting in dangerous operating
conditions and equipment breakdown. Check all bolts and nuts periodically during equipment
operation and keep them tightened to the specified torque. If hardware replacement becomes
necessary, replace with equivalent metric grade number.
NOTE: The following torque figures are those recommended for zinc plated, lightly oiled bolts.
Recommended assembly torques may be obtained by multiplying the torque figures in the
table below by:
0.78 –for degreased zinc plated bolts
1.10 –for black oxide finished bolts
0.81 –for M20x2.5P Tine Toolbar Hardware
It is necessary that all bolts be tightened to the correct recommended assembly torque.
lbf.ft Nm lbf.ft Nm lbf.ft Nm
7/16 UNF 43 59 60 82 - -
7/16 UNC 39 53 54 74 - -
1/2 UNF 67 91 94 128 - -
1/2 UNC 59 81 83 113 - -
5/8 UNF 135 184 186 253 - -
5/8 UNC 117 159 165 224 - -
3/4 UNF 235 319 325 441 - -
3/4 UNC 210 285 290 394 - -
7/8 UNF 370 502 520 706 - -
7/8 UNC 335 455 470 638 - -
1UNF 550 746 775 1052 - -
1UNC 505 685 710 963 - -
M10 1.5 29 40 41 56 - -
M12 1.75 51 70 73 100 - -
M16 - - - - - 170 231
M16 2.0 126 171 180 245 - -
M18 - - - - - 254 345
M20 - - - - - 376 510
M20 2.5 247 335 351 477 - -
M22 - - - - - 475 645
M24 - - - - - 500 679
M24 3.0 425 577 608 825 - -
Head Markings
(Manufacturers marks
mayvary)
Recommended Assembly Torque
8.8
10.9
Wheel Stud
Metric Grade Number
S.A.E Grade Number
5
8
Size
Thread
Pitch
Wheel Stud
Head Markings
(Manufacturers marks
mayvary)

ORDERING PARTS
Page 15
06/07
When Ordering Parts:
The following information must be supplied
to facilitate fast and accurate processing of
a replacement parts order:-
•Gason part number and description
(as given in this manual)
•Quantity
•Machine model and serial number
•Method of despatch.
•Your Dealers name and address
For your convenience record the following
information below:
Name: ____________________________
_________________________________
Address: __________________________
_________________________________
Telephone Number: _________________
Machine Model No:__________________
Date Machine Purchased:_____________
Serial No.:_________________________
1118
Serial No. tag at left front of trailer frame
Subject to any applicable Federal, State or Territory laws or ordinances, which may apply from time to time, A. F.
Gason Pty Ltd reserves the right to make changes in design and specifications without notice or obligation and to
change or discontinue models at any time without incurring any liability to any Purchaser thereof.
Left and right hand: All references in this manual are determined by facing the direction of travel.
For warranty provisions please consult your Installation and Warranty Registration document.

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