The LEMKEN Primus-12 is a trailed field sprayer designed for efficient and safe application of spraying agents and liquid fertilizers. This device is manufactured to state-of-the-art standards and recognized safety rules, ensuring reliable operation when used correctly by trained personnel.
Function Description:
The Primus-12 is primarily used for applying spraying fluids to fields. It features a main tank for holding water, sprays, and fertilizers, with capacities ranging from 2300 L to 4200 L (nominal volume). The liquid flow system includes a spray pump (H) that draws fluid from the main tank (7) via a switching valve (C), a selection valve (A), and a suction filter (9). The fluid is then pumped to the nozzles via a diverting valve (D) and a self-cleaning pressure filter (3). A control valve (2) regulates the distribution rate, with automatic metering adjusting based on travel speed. An agitator (5) ensures constant mixing and concentration of the spraying fluid. The flowmeter (4) measures the volumetric flow to all nozzles, while a pressure sensor (23) monitors spray pressure and indicates filter contamination. When nozzles are off, part-width section valves (20) close, and fluid flows through a central bypass valve (21) into the agitator (5) to prevent settling.
The sprayer boom's height is adjusted via a hydraulic cylinder (1) on the lift mast, with vertical oscillations absorbed by a damper. Pendulum suspension (1) and electric or electro-hydraulic slope compensation (2) align the boom horizontally, even on uneven terrain, using an angle sensor (3). A stabiliser (1) dampens swing suspension for better boom positioning on slopes. DISTANCE-Control automatically adjusts the boom to terrain using sensors (1) on the boom and a pendulum sensor (2) on the chassis. Hydraulic flow dividers (1) and pressure limiting valves ensure symmetrical folding of the boom and its ends, safeguarding against overload.
The device also includes a clean water tank (1) for internal cleaning, thinning remaining quantities, canister cleaning, and external cleaning, with capacities of 320 L or 420 L. A hand-wash tank (1) provides clean water for handwashing.
Important Technical Specifications:
- Tank Volume:
- Main tank nominal volume: 2300 L (2500 model), 3200 L (3500 model), 4200 L (4500 model)
- Main tank actual volume: 2450 L (2500 model), 3400 L (3500 model), 4410 L (4500 model)
- Clean water tank: 320 L or 420 L
- Hand-wash tank: 12 L
- Pumps:
- Working pump: P260 (2500/3500 models), P200 (4500 model)
- Agitator pump: P200 (4500 model)
- PTO shaft: DIN 9611 / ISO 500
- Number of pistons: 4 (P260), 2 x 4 (P200/P200)
- Rated speed: 540 rpm
- Speed range: 450 - 700 rpm
- Flow rate at 5 bar and rated speed: 520 l/min (P260), 400 l/min (P200/P200)
- Oil type: SAE 15W40
- Approximate oil quantity: 1.7 L (P260), 2 x 1.3 L (P200/P200)
- Pressure in accumulator: Approx. 4 bar (1-10 bar spray pressure), Approx. 6 bar (5-15 bar spray pressure)
- Spraying Fluid System:
- Spraying pressure range: 1.0 – 8.0 bar
- Permissible system pressure: 10 bar
- Application quantity: 200 – 600 l/ha
- Filters:
- Suction filter: 7.8 cm diameter, 16.5 cm length, 225.00 cm² screen area, 0.36 mm mesh width
- Filter on filling hose: 17.5 cm diameter, 6.0 cm length, 329.87 cm² screen area, 1.00 mm mesh width
- Press filter: 5.0 cm diameter, 21.0 cm length, 192.00 cm² screen area, 0.25 mm mesh width
- Hydraulic System:
- Hydraulic oil: HLP 46 (ISO VG 46; DIN 51 524 T.2)
- Required pressure in tractor hydraulics: 160 bar
- Maximum permissible pressure: 200 bar
- Pressure limit valves: Factory set to 150 bar (not adjustable)
- Braking System: Available with compressed air brake (manual brake force regulator) or hydraulic braking system. Maximum permissible speed 25 km/h or 40 km/h depending on system.
- Dimensions (approximate):
- Length (L): 5300-6300 mm
- Width (W): 2600-3000 mm
- Height (H): 3300-3700 mm
- Weights (empty/maximum):
- Axle load: 2700-2800 kg / 5800-7850 kg
- Drawbar load: 250 kg / 1750 kg
- Gross weight: 2950-2950 kg / 7550-9550 kg
- Noise Level: Under 70 dB (A) in operation.
Usage Features:
- Operation Terminal: Electronic control via ISOBUS operation terminals (LEMKEN CCI 1200, CCI-200, CCI-50 recommended). Enables data transfer via USB stick.
- Multifunction Handle: Simplifies operation with 24 functions, including spraying, part-width section control, and boom operation.
- Part-width Section Box CCI A 20: Extends the operation terminal for electrical part-width section valves, simplifying operation and enabling nesting treatment.
- Nozzles: Accommodates various nozzle types with different volumetric flows, spray patterns, and drop sizes. Edge nozzles are available for sharp-edged treatment.
- Drop Hoses: Intended for liquid fertilizer application directly onto the ground, minimizing foliage burning.
- Chemical Inductor: Allows pouring spraying agents into the main tank, with features for agitator nozzle, edge moistening, and canister flushing.
- Automatic Filling Stop: With TANK-Control, the filling process stops automatically once the pre-selected quantity is reached.
- External Filling Connection: Allows pumping water or ready-mixed spraying fluid from external tanks.
- Intake Connection: For pumping water or ready-mixed spraying fluid into the main tank, with a maximum suction depth of 2.5 m.
- Safety Features: Equipped with safety devices, including protection against unauthorized use (K80, traction loop, cross shaft locks).
Maintenance Features:
- Regular Checks: Daily checks of oil level, tire pressure, and hydraulic connections.
- Maintenance Intervals: Detailed schedule for lubrication, checking, replacing, adjusting, and oil changes for various components (e.g., joints, traction loop, parking support, ropes, axles, lift mast, boom, pumps, filters).
- Lubrication: Grease nipples and open lubrication points require multi-purpose grease. Piston rods require acid-free grease. Pumps require 15W40 oil.
- Filter Cleaning: Suction and pressure filters must be cleaned regularly to prevent clogging and ensure smooth operation.
- Pump Maintenance: Annual maintenance by qualified personnel includes checking the pump, changing membranes, and changing oil. Pressure accumulator pressure should be checked after 50 operating hours.
- Braking System Maintenance: All braking system maintenance must be carried out by specialist workshops or trained technicians.
- Cleaning: Comprehensive cleaning procedures for the main tank, piping system, nozzles, and external surfaces after each use, season, or before wintering. Includes specific instructions for cleaning empty canisters and rinsing the chemical inductor.
- Antifreeze: Procedures for draining antifreeze before use and treating fluid-carrying parts with biodegradable antifreeze for winter storage.
- Qualified Personnel: Many maintenance and repair tasks require qualified, trained, and instructed personnel.
- Environmental Protection: Emphasizes proper disposal of materials and operating supplies in line with environmental regulations.
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