The BLU-JET AT4615 is an All Terrain Injection Liquid Applicator manufactured by Unverferth Mfg. Co., Inc. This manual, Part No. 45006, covers units beginning with Serial Number A66640100.
Function Description:
The AT4615 is designed for the application of agricultural chemicals, specifically for all-terrain injection of liquid products. It is a trailed implement that connects to a tractor via a drawbar hitch. The applicator features a toolbar with coulter assemblies for injecting liquid into the soil. The design includes various row spacing options, such as 15, 17, 23, 25, 27, 33, and 35 rows, with corresponding row spacings of 15", 18", 20", and 30". The machine is equipped with a pump drive system, which can be either ground-driven or hydraulically driven (with options for centrifugal or piston pumps), to control the flow rate of the liquid. The toolbar is designed to fold for transport and unfold for field operation, with hydraulic cylinders controlling these movements.
Important Technical Specifications:
- Model: AT4615
- Serial Number: Beginning with A66640100 (located on the left-hand side behind the tongue pull plate).
- Wheel/Axle: 120” single, with 380/90R46 tires (or IF320/90R46 R-1 for mounted wheel & tire).
- Tire Pressure: Maximum 64 PSI for lugged tractor tires (center section). Specific tire pressures vary by tire make and size (e.g., Mitas VF380/90R46 R-1: 64 PSI; Goodyear 320/90R46 R-1: 64 PSI; Carlisle 20.5x8.0B10: 35 PSI; Carlisle 145/12 Load Range D: 65 PSI).
- Wheel Nut Torque Requirements: 1/2”-20(UNF) Grade 5: 75 Ft.-Lbs.; 3/4”-16(UNF) Grade 8: 365 Ft.-Lbs.
- Pump Drive: Options include single piston (34.2 GPM Max) or double piston (68.4 GPM Max) pumps. Hydraulically driven centrifugal pumps are also available.
- Pump Pressure (non-PWM Pump): Filter inlet or pump pressure should be 100 PSI, dropping to 95 PSI with agitation.
- Nozzle Pressure: Recommended 60-120 PSI for proper fertilizer injection.
- Toolbar Configurations:
- 15 Row 30” Spacing (15R30) Gull Wing: 57.5’ Toolbar
- 17 Row 30” Spacing (17R30) Gull Wing: 42.5’ Toolbar
- 23 Row 30” Spacing (23R30) Gull Wing: 57.5’ Toolbar
- 25 Row 20” Spacing (25R20) Gull Wing: 42.5’ Toolbar
- 25 Row 30” Spacing (25R30) Gull Wing: 62.5’ Toolbar
- 27 Row 18” Spacing (27R18) Gull Wing: 40.5’ Toolbar
- 33 Row 15” Spacing (33R15) (Small Grain): 41.25’ Toolbar
- 35 Row 20” Spacing (35R20) Gull Wing: 58.33’ Toolbar
- Vertical Tongue Load: Approximately 8,500 lbs. unfolded (4,800 lbs. with toolbars folded for transport).
- Maximum Transport Speed: 20 mph on highway, 10 mph off-highway.
- Lifting Device Rating for Assembly: Minimum 1,000 lbs. for tongue assembly, 8,000 lbs. for main frame assembly, 400 lbs. for main frame transportation wheels, 750 lbs. for wheel and tire assembly, 150 lbs. for spindle removal, and 3,000 lbs. for wheel and tire support during removal.
Usage Features:
- Pre-Delivery Checklist: Ensures hardware is tightened, machine is lubricated, safety and operating procedures are reviewed, field adjustment information is reviewed, and warranty information is reviewed.
- Hitching to Tractor: Requires proper tractor ballasting for drawbar operation and vertical tongue load. The tractor drawbar should be at least 18 inches from the ground, or the applicator hitch can be adjusted. A ball swivel hitch (JAP3232) requires a 2” diameter drawbar pin, while a clevis hitch (JAM2144) requires a 1 1/4” diameter drawbar pin.
- Transport Chain: Always use an ASABE approved transport chain with a minimum rating equal to the gross weight of the implement and all attachments.
- Hydraulic Connections: Primary wings use float in the field; secondary and third wings use active down pressure (not float) with swivel coulters. Hydraulic hoses should be routed carefully to prevent kinking or rubbing.
- Pump Operation: Hydraulically driven pumps require correct configuration for the tractor's hydraulic system (closed center, open center, load-sensing) to prevent damage. Minimum circuit flow should be set before initial operation. Never operate the pump dry or with the inlet selector valve closed.
- Rate Orifice Installation: Orifices are inserted after removing the nozzle nut. Blade depth should be adjusted to 4” using gauge wheels or coulters, and nozzles aligned with the blade trench.
- Toolbar Folding/Unfolding: Requires the toolbar to be fully raised before unfolding. Primary wings unfold first, followed by secondary and third wings (if applicable). Transport locks must be unlocked/locked.
- Toolbar Flex Adjustment: Spacer plates can be added or removed to achieve desired flex in the third wing toolbar.
- Depth Adjustment: Depth collars are used on toolbar lift cylinders to set blade depth (typically 4-5 inches). Wing latch must move freely. Primary wing fold hydraulics must be in float position during operation to allow wings to flex.
- Clean Water Tank: Provided for general washing and emergency eye washing. Water is not suitable for human consumption.
Maintenance Features:
- General Maintenance: Includes coating exposed cylinder piston rods with rust preventative, inspecting parts for replacement, and lubricating all points.
- Coulter Maintenance: Check coulter post blade hubs for free rotation; replace/pack bearings if needed. Check coulter post swivel for free movement and grease until fresh grease purges.
- Hydraulic System Purging: Essential for new or maintained systems to remove air. Involves disconnecting cylinder rod ends, pressurizing the system to extend/retract cylinders, checking oil reservoir, and repeating the process 10-12 times.
- Filter Cleaning: Primary filter (at the rear, near quick-fill) and secondary filter (on the tongue, near electric valves) should be cleaned periodically. This involves rotating the pump inlet valve to OFF, draining, unscrewing the housing, removing the screen, flushing with water, and reassembling.
- Winterizing: Perform a complete system rinse, wash the applicator, remove as much water as possible from the main tank, add approximately 50 gallons of R.V. antifreeze, and loosen diaphragm caps on nozzle bodies to relieve pressure.
- Wheel, Hub, and Spindle Disassembly/Assembly: Requires safe lifting devices. Involves removing hubcap, gasket, cotter pin, castle nut, and spindle washer. Bearings should be packed with Extreme Pressure NLGI #2 grease. Wheel nuts/bolts must be torqued regularly as specified in the "Torque Chart."
- Torque Charts: Detailed tables for Grade 5 and Grade 8 capscrews, providing foot-pounds and Newton-meters for various sizes.
- Hydraulic Fittings: Instructions for SAE Flare Connection (J.I.C.) and SAE Straight Thread O-Ring Seal, including proper tightening procedures.
- Schematics: Electrical and hydraulic schematics are provided for troubleshooting and maintenance.
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