Page 1
Trailed Fertiliser and Lime Spreader OPERATORS MANUAL G/Drive & Hydraulic VRT Models REVISION – * GPN 224132 07/18 COPYRIGHT Neither this manual or part thereof may be reproduced or published without the prior permission of AF Gason Pty Ltd 07/18...
Fig.1 7312 Series Fertiliser Spreader. While every effort has been made to ensure the accuracy of the information in this manual, AF Gason Pty Ltd reserves the right to delete, change or add information without notice. 07/18...
Seeder, contact your local authorized DO NOT remove any safety guards while the Gason Dealer. spreader is operating. To ensure trouble free and safe operation DO carry out the daily safety checks and operate of your spreader, it is important to carry out a the spreader in a safety conscious manner.
Page 7
Safety Page 3 Transporting Do Not transport the spreader on public roads when loaded. Do Not exceed 25km/h when towing the spreader when loaded on private Never transport the Ground Drive roads. Maximum speed for towing an empty spreader with the jockey wheel in contact with spreader is 40km/h.
Gearbox Oil Volume ..3.1 litres 480/80R34 (row crop opt.) Hydraulic Motor ....100cc capacity Manual Override ..... Standard Feature A.F. Gason P/L reserves the right to make changes to the specifications listed where required to suit production or availability. product...
CONVERSION FORMULAE Page 5 Useful Conversions – Formulae LENGTH: 1 km = 0.621371 mile 1 mile = 1.609344 km = 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 m...
BOLT SPECIFICATIONS Page 6 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.
Subject to any applicable Federal, State or Territory laws or ordinances, which may apply from time to time, AF 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.
This can be reduced if operating the spreader at lower spinner & feed chain speeds. Fig.4 Tarp kit fitted to a 7390 model Final Pre-Delivery Check List After the Spreader has been assembled, a final check should be carried out before delivery.
OPERATION Page 10 General Information Feed Chain Cover Plate Before operating the spreader, check that Feed chain cover plates (qty 2), are the machine is in good working order. provided to protect the feed chain and reduce chain loading when using free flowing granulated ...
OPERATION Page 11 Spinners Supplied with the Spreader Changing the Spinners The spinner disc’s are handed, and have The 9 & 12T WideSpread spreader comes identification marks. Left and right hand are with two sets of spinners. Both are needed to viewed from the back of the machine looking allow the machine to achieve the 36 metre forward.
Page 16
OPERATION Page 12 15). Simply squeeze the rubber boot past the fin during disc fitment. Rear Door Opening To set the rear door, remove the clip from the adjusting handle and rotate to raise or lower the door to the required position using the radial decal as an indicator.
OPERATION Page 13 Suggested Spinner Speeds General Purpose Spinner Standard General Purpose 5mm x 4 fin Spinners for almost all products including granular products to 30 metres. Product Type Spinner Speed Bout Width (m) (rpm) Approx. Approx. Urea Granular 700 - 780 16 - 28 MAP / DAP Granular...
OPERATION Page 14 WideSpread Spreader Setup Note: Product quality and weather When spreading pelletised fertiliser to 36 conditions will have an impact on the metres, it will be necessary to have the WideSpread Spinner Disc’s fitted as well as the machines ability to spread to wide widths.
Page 19
OPERATION Page 15 2993 Fig.20 WideSpread Ctr Vee & panels for changing settings It is important that both the left and right discharge settings are the same. Uneven distribution may occur if the flow of product onto the spinners is different one side to the other. Refer to Fig.20 for a list of names used to identify the various panels and Table 22 for the appropriate settings.
OPERATION Page 16 .Product Bulk Width of Applic.Rate Ground Width of Depth of Density Spread (kg/ha) Speed Discharge Discharge (kg/L) (km/h) Opening Opening (mm) (mm) Urea 0.75 40-200 Urea 0.75 40-100 Urea 0.75 100-150 Urea 0.75 150-300 Potash/MAP 50-180 Potash/MAP 180-300 Table 22 Showing the Discharge Opening position on the WideSpread Ctr Vee If making an adjustment, both the left and...
Page 21
OPERATION Page 17 The standard Factory Setting (FS) fin position is:- Recommended Fin Settings Medium Fin position C Long Fin position 1 Product Width of Long Medium spread (m) Figure 25 shows the fins on the left hand Urea spinner in this position. If in doubt at where the (FS) best fin setting position is for a particular Urea...
Even rough compost products that may be contaminated with stones or small hard objects can be spread but Gason’s suggest the operator purchase and fit a Heavy Duty spinner option that is available for your spreader. This will prevent damaging your General Purpose spinners.
Operation - Ground Drive Page 19 Ground Drive Operation Maximum spinner speed for spinners is 820rpm. This section will explain the process of setting up and calibrating a Ground Drive spreader once the correct spinners have been fitted and adjustments made. Setting Spinner Speed Spinner speed is one of the most important factors in achieving an accurate spread pattern.
Operation - Ground Drive Page 20 Use the transport lock if travelling The second and more simplistic method to between paddocks or across roads. determine the approximate spread width is to Setting Application Rates estimate the width by eye. This can be done by spreading a small amount of product at the The application rate is controlled by: desired rate onto clear ground or onto a length of...
Operation - Ground Drive Page 21 Changing Gearbox Ratio The feed chain spreader is equipped with a ground driven 3-speed gearbox. The gearbox has been designed to offer a large variation in feed chain speeds to cope with the low and high application rates.
Operation - Ground Drive Page 22 Rear Door Adjustment A pointer, attached to the top of the door, To set the rear door, remove the clip from and calibration decal is used to show the distance the adjusting handle and rotate to raise or lower from the bottom of the floor to the underside of the the door to the required position.
APPLICATION RATE – Ground Drive Page 23 Setting Application Rate Application Rate by the Rate Chart Introduction 1. Determine the bulk density of the product. 2. Estimate the bout width that the spreader will The application rate for the spreader can be driven.
Application Rate – Ground Drive Page 24 pplication Rate Calibration Process 1. Refer to the Rate charts in the rear of the manual to determine the most appropriate gearbox ratio and door setting for your particular application rate. Note: Always use the lowest gear possible at the highest door setting to minimise the loading on the gearbox.
Page 29
Application Rate – Ground Drive Page 25 The chart shows an estimated rear door opening of 119mm. After setting the rear door to 9. Weigh the sample collected and multiply the this setting the jockey wheel was rotated to prime answer by 20 if the full number of handle the feed chain and discharge area.
Table 44 Disclaimer There are many variables that affect the spreading performance of the Gason multi-purpose spreader. It is important the wind speed and direction, ground contour, plant height and fertiliser consistency are considered prior to determining the spreader settings and width of pass.
Monitor System The standard monitor system for the Gason VRT Spreader is the Farmscan Ag 7300 Controller. Other monitor options are available and although the basic concept remains the same, there will be some differences in terminology and screen layouts for each brand.
Operation – VRT Drive Page 29 Product & Density Selection This product calibration figure can be fine-tuned by changing the ‘Flow Factor’ of the product. This To set up a new material or change to a will then either increase or decrease the output of previously spread product, you will need to product depending on its flow properties.
Operation – VRT Drive Page 31 Setting the Spreader Width Alternatively, you can adjust the current width of spread setting from the main operating The spreader width setting can be revised screen as long as the increment setting has a on the measurement screen which is accessed value (factory set is 1 metre increments).
Operation – VRT Drive Page 32 Starting to Spread Product 6. Drive at a suitable speed. The application 1. Place material in the bin. rate should show the correct rate as your 2. Set your Job 1 Applied hectares to zero. driving.
Page 37
Fig.62 The Yellow handled fasteners used to hold the WideSpread Centre Vee and the base Ctr Vee must be fitted with the anti-loosening grommet to prevent the knob from coming undone. Replace with Gason part No. 800698. Fig.60 Gason supplied USB memory card inserted into the cable extension on the 7300 monitor.
GENERAL MAINTENANCE Page 35 General Maintenance grease into the grease nipple on the end of the pin. Introduction 3. Grease all driveshaft bearings at the rear of the spreader. Regular maintenance will ensure trouble 4. Grease the bushes on the front and rear idler free operation for the life of the spreader.
Page 40
General Maintenance Page 36 End of Season Checklist 11. Check that the gearbox transport locking pin functions. General Checklist VRT Related Check List 1. Wash Spreader clean of all fertiliser product and dirt. 1. Check the level & quality of the oil in the VRT 2.
Check that the sensor wire is intact. spinners rotate. Check battery voltage. Use a replaceable 3.6V AA battery. Please contact your Gason dealer for further information regarding spinner tacho repair. Spread Pattern (General Purpose Spinners) Spread pattern variation will occur if the 1.
Page 42
General - Spare Parts Page 38 Problem Possible Solution Check that the tractors hydraulics are VRT Hydraulic Drive System` engaged. Check that the quick release tips are 1. Hydraulic spinners do not operate when engaged on screen. plugged into the correct remote & that flow is in the right direction.
Page 45
General - Spare Parts Page 41 QTY. ITEM PART NUMBER DESCRIPTION Trailer Frame – 9 & 12T Spreader 230360 230362 Bin Assembly 9 & 12T Supports And Covers (Feed Chain) 211944 Bracket Support 214904 Bracket Support-Central 917421 Screw Set M10 x 25 x 1.5 S/S 903409 Nut Nyloc M10 SS GR316 907417...
Page 46
General - Spare Parts Page 42 QTY. ITEM PART NUMBER DESCRIPTION 211152 Alum. Rear Brush Holder 211154 Skirt Rear (Material 211022) 214382 Plate Rear Brush Mount 210776 Rivet Blind 4.8 S/S (Not Shown) Tacho - (G/Drive) Tacho Kit – Spinner Spreader 12mm Sensor 233911 Front Idler 210882...
Page 47
Decal-Transport Speed 40 km/h Maximum (Not Shown) 216072 Decal-Do Not Ride on Machine (Not Shown) 214315 Decal-Chain Tensioner (Not Shown) 232952 Decal Gason Shaded Large Sight Glass (Hole cut out dimension 75mm across) 233819 Sight Glass Med-Bin 233869 Gasket-Sight Glass...
Page 61
Braked Axle Assembly 12T Option - Spare Parts Page57 ITEM PART NUMBER DESCRIPTION QTY. 210070 Bearing Outer 214694 Hub Machined 100 Series 10 Stud 214695 Nut Slotted M45x2 214697 Dust Cap Bolt-on 214699 Wheel Nut M22 x 1.5P Hex 214700 Stud Wheel M22 x 1.5P 214701 Wear Ring...
Page 62
Ground Drive Gearbox Components - Spare Parts Page58 Rear of Bin Ground Drive Option ITEM PART NUMBER DESCRIPTION QTY. Hydraulic Cylinder Mounting Cylinder Hyd. 1.5” x 80mm 211131 907408 Washer Flat 21 x 37 x 1.6 (Not Shown) 903931 Nut Nyloc M20 (Not Shown) 913702 Bolt M20 x 50 (Not Shown) Transport Lock –...
Page 63
Ground Drive Gearbox Components - Spare Parts Page59 ITEM PART NUMBER DESCRIPTION QTY. 207451 Pin Disengaging (Not Shown) 207146 Spring (Not Shown) 207410 Roll Pin Ø5 x 70mm Lg (Not Shown) 907415 Washer Flat (Not Shown) Bearings and Gearbox To Main Body 215080 Gear Box Assy.
Page 64
Gearbox Low Ratio Series 2 (215080) - Spare Parts Page60 ITEM PART NUMBER DESCRIPTION QTY. 216095 3 Speed Gear Shift Assembly 216673 Quad Group Sprocket Assembly 216675 Final Group Sprocket Assembly 216676 Output Sprocket Assembly 220453 Output Shaft Assembly (Includes Bearings) 215144 Shaft Idler 215143...
Page 65
Gearbox Low Ratio Series 2 (215080) - Spare Parts Page61 ITEM PART NUMBER DESCRIPTION QTY. Bearing – Top shaft 210708 800894 Washer Flat M10 903407 Nyloc Nut M10 Spacer – Internal Lower Brg. 3mm 211226 Ref. 228288 Spacer - Internal Lower Brg. 1.6mm Ref.
Page 66
Ground Drive Tachometer - Spare Parts Page62 ITEM PART NUMBER DESCRIPTION QTY. 233911 Tachometer Kit Spinner post Nov17 (includes items 2-14) Ref. 229003 Tacho Display-co400 (Replaceable Battery) Battery- ‘AA’ 3.6V Lithium 229394 Ref. Sensor M12x1P – Spreader Tacho 233905 229019 Mount Bracket 234716 Cable Ext.
Page 67
VRT Drive Components - Spare Parts Page63 ITEM PART NUMBER DESCRIPTION QTY. 231048 Support Assembly-Torque Arm 231049 Gearbox & Shaft Assembly-VRT Drive 903605 Nut Nyloc M12 CL8 AS1285 903930 Nut Nyloc M16 CL8 Washer Flat 1/2” x 1-1/4" x 16G Z/P 906601 907415 Washer Flat M16 x 30mm x 2mm Z/P...
Page 68
VRT Gearbox & Shaft Assy - Spare Parts Page64 ITEM PART NUMBER DESCRIPTION QTY. 230933 Gearbox-Reduction 233922 Gasket-Hyd. Motor To Gearbox 231045 Motor Hyd.100cc 231047 Arm-Torque Restraint 231086 Shaft Assy-Gearbox 231089 Key-14 X 9 X 90lg 231090 Collar-Vrt Drive Shaft 231091 End Cap-Vrt Shaft Retainer 231092...
Page 69
Ground Drive Hydraulic Components - Spare Parts Page65 Ground Drive Hydraulic Schematic Option ITEM PART NUMBER DESCRIPTION QTY. 804053 Fitting Hyd.- Nipple 1/2BSPT Q/REL. 210950 Fitting Hyd.- Nipple 3/4BSPPM x 1/2BSPTM 210954 Fitting Hyd.- Elbow 3/4BSPPM x 3/4BSPTM 206627 Fitting Hyd.- Elbow 3/4BSPPM x 3/4BSPTM 07/18...
Page 70
Ground Drive Hydraulic Components - Spare Parts Page66 ITEM PART NUMBER DESCRIPTION QTY. 210940 Fitting Hyd.- Nipple 3/4BSPPM x 3/4BSPTM 210942 Fitting Hyd.- Nipple 3/4BSPPM x 1-1/16JICM 210941 Fitting Hyd.- Elbow 3/4BSPPM x 1-1/16JICM 210943 Fitting Hyd.- Nipple 1/4BSPPM x 1/4BSPPM 210947 Fitting Hyd.- Elbow 1-1/16JICMM 210948...
Page 71
Ground Drive Hydraulic Components - Spare Parts Page67 ITEM PART NUMBER DESCRIPTION QTY. 230994 Kit Hyd. Tube Ref. 234983 Hyd. Circuit Drawing (Not Shown) Ref. 230993 Kit Hyd. Hose (Not Shown) Ref. Hydraulic Hardware, Not shown on Drawing ITEM PART NUMBER DESCRIPTION QTY.
Page 73
VRT Hydraulic Components - Spare Parts Page69 QTY. ITEM PART NUMBER DESCRIPTION 233844 Manifold Assembly-Hydraulic VRT 2 Stat. Remote Nipple Quick Release 1/2” BSPP Poppet Type 233988 231049 Gearbox & Shaft Assembly-VRT Drive Spreader 231045 Motor Hydraulic. 100cc-VRT Drive Spreader Elbow 1-1/16”...
Page 74
VRT Hydraulic Components - Spare Parts Page70 QTY. ITEM PART NUMBER DESCRIPTION Washer Spring 1/4” x 1/16” 908201 ID Tag – Feed Chain 234009 ID Tag – Spinner 234010 06/18...
Page 78
Tarp Kit Option Page74 QTY. ITEM PART NUMBER DESCRIPTION 231385 Tarp PVC Roll 9 & 12T 234399 Tube Assy - Tarp Winding 9 & 12T 231387 Tube Centre Assy 9 &12T Bracket – Tarp Rest H/Duty 231393 231389 Plate Tarp Clamping - Long 917327 Screw Set M8 x 30 Pan Head Z/P Washer Flat 5/16”...
Page 79
Tarp Kit Option Page75 ITEM PART NUMBER DESCRIPTION QTY. 206309 Washer Flat M6 x 12.7 Z/P 211813 Kit Handle Assy 229040 Washer - Spreader 231391 Plate-Crank Arm Holder Mount 231392 Clamp-Rubber Tie Down 234400 Crank Arm-Spline Type 903202 Nut Nyloc M6 903302 Nut Nyloc M8 906201...
Need help?
Do you have a question about the 7390 and is the answer not in the manual?
Questions and answers