A Feed Mixer Gearbox is the core mechanical component in a feed mixing vehicle, responsible for transmitting power from the tractor's Power Take-Off (PTO) to the mixing augers inside the wagon. It precisely controls the rotational speed and torque delivered to the augers, ensuring efficient and uniform blending of various feed ingredients like hay, silage, grains, and supplements. A robust and reliable gearbox is critical for achieving a consistent Total Mixed Ration (TMR), which is fundamental for livestock health and farm productivity.
Raydafon Group has engineered its feed mixer gearboxes to meet the rigorous demands of modern farming. Our commitment to precision and durability sets our products apart.
The following tables detail the standard specifications for the Raydafon Group feed mixer gearbox series. Exact specifications may vary based on model and mixer size.
| Model Series | Max Input Power (HP) | Max Input Torque (Nm) | Standard PTO Speed (rpm) | Gear Ratio Range | Output Speed Range (rpm) |
|---|---|---|---|---|---|
| FMG 200 | 80 - 120 | 850 | 540 / 1000 | 1:1.5 to 1:4.2 | 130 - 360 |
| FMG 300 | 120 - 180 | 1250 | 540 / 1000 | 1:1.8 to 1:4.5 | 120 - 300 |
| FMG 450 | 180 - 250 | 1850 | 1000 | 1:2.2 to 1:5.0 | 100 - 220 |
| FMG 600 | 250 - 350 | 2600 | 1000 | 1:2.5 to 1:5.5 | 90 - 180 |
| Parameter | Specification |
|---|---|
| Housing Material | High-tensile cast iron (GGG-50) or fabricated steel plate |
| Gear Type | Case-hardened and precision-ground helical gears (Standard on FMG 300+), Hardened spur gears (FMG 200) |
| Bearings | Heavy-duty tapered roller bearings on input and output shafts |
| Seals | Double-lip radial shaft seals with grit guards; Labyrinth seals on optional extended shafts |
| Lubricant Type | SAE 80W-90 GL-5 Gear Oil |
| Lubricant Capacity | 2.5 - 6.5 liters (varies by model) |
| Input/Output Shafts | Splined shafts, heat-treated for wear resistance |
| Weight (Approx.) | 85 kg - 220 kg |
The Raydafon Group feed mixer gearbox is designed to power a variety of mixer types and sizes, essential for different farm scales.
Q: How often should I change the oil in my Raydafon feed mixer gearbox?
A: For optimal performance and longevity, we recommend an initial oil change after the first 50 hours of operation to remove any break-in wear particles. Subsequently, change the gear oil every 500 operating hours or at least once per feeding season, whichever comes first. Always check for contamination or moisture and change more frequently if operating in particularly dusty or wet conditions.
Q: My gearbox is getting excessively hot to the touch. What could be the problem?
A: Overheating is a serious concern. Primary causes include: 1) Incorrect or degraded oil: Check oil level and quality. Old or wrong viscosity oil loses its lubricating and cooling properties. 2) Overloading: Consistently overfilling the mixer or mixing overly dense material strains the gearbox. 3) Bad bearings or worn gears: Increased internal friction generates heat. 4) Misalignment: A misaligned PTO shaft creates excessive load. Stop use immediately, allow it to cool, and inspect for these issues.
Q: Can I use a 1000 rpm PTO on a gearbox rated for 540 rpm?
A: Absolutely not. This is a critical safety and mechanical issue. Using a higher input speed than rated will dramatically increase the gearbox's internal speed and torque, leading to catastrophic failure, gear tooth breakage, and bearing seizure. Always match the tractor's PTO speed setting to the gearbox's specified input speed. Some Raydafon models are dual-rated (540/1000) and have a selector; ensure it is set correctly.
Q: What is the warranty on a Raydafon Group feed mixer gearbox, and what does it cover?
A: Raydafon Group offers a standard 24-month or 2000-hour warranty (whichever occurs first) on materials and workmanship against defects. The warranty covers failures of gears, bearings, and shafts under normal operating conditions. It does not cover damage resulting from improper installation, lack of maintenance (like not changing oil), misuse, overloading, PTO mismatch, or accidental damage. Always retain your purchase documentation.
Q: How do I identify the correct replacement gearbox for my old feed mixer?
A: You will need several key measurements: 1) Input Shaft: Number of splines and diameter. 2) Output Shaft(s): Configuration (single or double), diameter, spline/keyway details. 3) Gear Ratio: Determine by marking input and output shafts and counting rotations. 4) Housing Dimensions: Bolt hole pattern (center-to-center distance), overall shape, and mounting footprint. 5) Original Model Number: If visible. Providing these details to a Raydafon Group dealer ensures a perfect match.
Q: Is it normal for a new gearbox to have some initial noise?
A: A slight "break-in" period with minimal operational noise is normal as gears and bearings settle. However, loud grinding, knocking, or whining sounds are not normal. These indicate potential issues like improper lubrication, misalignment, or a manufacturing defect. Monitor the noise level during the first few hours. If unusual sounds persist or intensify, stop operation and contact your supplier or Raydafon Group technical support.
Q: What maintenance can I perform myself to extend gearbox life?
A: Regular owner maintenance is crucial. 1) Daily: Visually inspect for oil leaks before and after use. Feel the housing for abnormal heat. Listen for unusual sounds. 2) Weekly: Check the oil level via the sight glass or dipstick. 3) Seasonally/Per Schedule: Perform complete oil changes. Tighten mounting bolts to specified torque. Grease any external fittings (e.g., on PTO shaft). Inspect and replace worn input/output shaft seals if leaking. Keep the gearbox clean from caked-on feed and dirt.
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