gearbox in your combined tillage machine<\/strong> is a precision power conversion device. Let us trace the energy pathway:<\/p>\nInput: Capturing PTO Energy<\/h3>\n
Power enters through a precision-machined splined coupling accepting 540 RPM (1-3\/8″) or 1000 RPM (1-3\/4″) PTO output. The input shaft rides on spherical roller bearings selected specifically for the load profile of multi-function tillage applications.<\/p>\n
Transformation: The Gear Train<\/h3>\n
Inside the housing, precisely meshed straight bevel gears convert PTO high-speed input into modified speed and amplified torque for the multi-shaft output. The combined tillage gearbox is a multi-output unit that simultaneously drives discs, tines, and packer rollers from a single PTO input. Positioned centrally on the implement frame, it distributes power to each working element through separate gear trains. Gear tooth profiles are case-hardened to HRC 58-62 and precision-ground, achieving 96-98% mechanical efficiency.<\/p>\n
Output: Driving the Multi-Shaft Output<\/h3>\n
The gearbox output shaft connects directly to the combined tillage machine’s multi-shaft output, delivering torque-multiplied power for productive multi-function tillage. The output coupling is machined to precise tolerances for responsive, zero-backlash power delivery.<\/p>\n
Protection: Sealing & Lubrication<\/h3>\n
A multi-layer protection system extends service life: grey cast iron housing resists impact and corrosion, VITON FKM lip seals block contaminants, mineral 85W-90 GL-4 maintains hydrodynamic film on all surfaces, and a breather vent equalizes pressure during temperature changes.<\/p>\n
🔁 Direct Interchange \u2014 Combined Tillage Gearbox Compatibility<\/h2>\n
The following OEM references are included as a fitment guide. We are independent manufacturers with no affiliation to the brands listed.<\/em><\/p>\nNotre Combined Tillage agricultural gearbox<\/strong> is a verified drop-in replacement for these brands and models:<\/p>\n\n- TYM:<\/strong> Mk-III, 292S, F-549 \u2014 ✅ dimensionally verified<\/li>\n
- Mitsubishi:<\/strong> Type 14A, 532X, G2.9 \u2014 ✅ dimensionally verified<\/li>\n
- Solis:<\/strong> K-306, Mk-II, Series 598 \u2014 ✅ dimensionally verified<\/li>\n
- Grimme:<\/strong> G5.5, G-238, Type 66K \u2014 ✅ dimensionally verified<\/li>\n
- ISEKI:<\/strong> G2.5, Model 9106, Mk-V \u2014 ✅ dimensionally verified<\/li>\n
- Merlo:<\/strong> Type 24F, D-246, 393T \u2014 ✅ dimensionally verified<\/li>\n<\/ul>\n
Inventaire des pi\u00e8ces de rechange<\/h3>\n
Complete parts availability for the Combined Tillage gearbox: bearing kits, seal kits, matched gear sets, shaft assemblies, and full rebuild kits. Standard parts ship within 24-48 hours.<\/p>\n
🎯 Combined Tillage Gearbox Sizing Guide \u2014 Get the Right Fit First Time<\/h2>\n
Use this step-by-step guide to identify the exact gearbox model for your combined tillage machine. Click each step for detailed instructions.<\/p>\n\nStep 1: Required multi-shaft output Speed<\/summary>\n\n
Comment:<\/strong> Refer to your combined tillage machine manufacturer’s manual for the recommended multi-shaft output operating speed<\/p>\nPourquoi c'est important\u00a0:<\/strong> Associ\u00e9 \u00e0 la vitesse de la prise de force, cela d\u00e9finit le rapport de transmission exact dont votre bo\u00eete de vitesses a besoin.<\/p>\n<\/div>\n<\/details>\n\nStep 2: Operating Environment<\/summary>\n\n
Comment:<\/strong> Assess exposure to dust, moisture, chemicals, and temperature extremes in your typical multi-function tillage conditions<\/p>\nPourquoi c'est important\u00a0:<\/strong> D\u00e9termine le degr\u00e9 d'\u00e9tanch\u00e9it\u00e9 appropri\u00e9, le rev\u00eatement de surface et les sp\u00e9cifications du mat\u00e9riau du bo\u00eetier<\/p>\n<\/div>\n<\/details>\n\nStep 3: Working Hours per Season<\/summary>\n\n
Comment:<\/strong> Estimate your annual operating hours for the combined tillage machine to determine appropriate service life rating<\/p>\nPourquoi c'est important\u00a0:<\/strong> Les op\u00e9rations \u00e0 forte cadence justifient des sp\u00e9cifications haut de gamme pour les roulements et les engrenages afin d'obtenir le co\u00fbt horaire le plus bas.<\/p>\n<\/div>\n<\/details>\n\nStep 4: Rotation Direction<\/summary>\n\n
Comment:<\/strong> Determine whether the multi-shaft output on your combined tillage machine requires clockwise or counter-clockwise output when viewed from the drive end<\/p>\nPourquoi c'est important\u00a0:<\/strong> Un sens de rotation incorrect endommagera l'outil ou ne produira aucun travail utile.<\/p>\n<\/div>\n<\/details>\n\nStep 5: Mounting Bolt Pattern<\/summary>\n\n
Comment:<\/strong> Measure the bolt hole positions, centre distances, and overall envelope on your combined tillage machine’s gearbox mounting flange<\/p>\nPourquoi c'est important\u00a0:<\/strong> Permet une installation directe par boulonnage, sans aucune fabrication ni plaque d'adaptation.<\/p>\n<\/div>\n<\/details>\n\nStep 6: Torque Demand<\/summary>\n\n
Comment:<\/strong> Calculate the peak torque your multi-function tillage application generates \u2014 including shock loads from obstacles or material variations<\/p>\nPourquoi c'est important\u00a0:<\/strong> La bo\u00eete de vitesses doit supporter le couple maximal sans d\u00e9clencher la protection contre les surcharges en fonctionnement normal.<\/p>\n<\/div>\n<\/details>\n\nStep 7: Output Shaft Type<\/summary>\n\n
Comment:<\/strong> Identify the coupling type on your combined tillage machine \u2014 keyed, splined, flanged, or hollow bore<\/p>\nPourquoi c'est important\u00a0:<\/strong> Mismatched outputs require costly adapter couplings and introduce potential failure points<\/p>\n<\/div>\n<\/details>\n\ud83d\udca1 Conseil de pro\u00a0:<\/strong> For fastest service, email us the old gearbox part number (if visible), your tractor brand and model, and your combined tillage machine manufacturer and model. Our engineers will confirm the exact match and provide a quotation within one business day.<\/p>\n![\"Agricultural](\"http:\/\/mowergearbox.top\/wp-content\/uploads\/2026\/03\/agricultural-gearbox-5.webp\")
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🔧 Technician’s Installation Manual \u2014 Combined Tillage Gearbox<\/h2>\n
Follow these instructions for a successful installation of your new Combined Tillage gearbox. Correct installation is critical for achieving maximum service life and warranty coverage.<\/p>\n\nStep 1: Fill With Lubricant<\/summary>\n\n
Retirez le bouchon de remplissage et ajoutez lentement l'huile de bo\u00eete de vitesses recommand\u00e9e jusqu'au rep\u00e8re de niveau. Utilisez la viscosit\u00e9 sp\u00e9cifi\u00e9e dans la documentation de la bo\u00eete (g\u00e9n\u00e9ralement SAE 80W-90 GL-5 ou \u00e9quivalent). Remettez le bouchon de remplissage en place et serrez-le \u00e0 la main, puis \u00e0 l'aide d'une cl\u00e9. V\u00e9rifiez que le bouchon de mise \u00e0 l'air libre est propre et d\u00e9gag\u00e9.<\/p>\n<\/div>\n<\/details>\n\nStep 2: Position & Secure New Gearbox<\/summary>\n\n
Carefully lift the new Combined Tillage gearbox into position on the mounting flange, aligning all bolt holes. Insert mounting bolts hand-tight first, confirming proper alignment. Once all bolts are started, torque them in a star (cross) pattern to the value specified in the installation manual. Verify the gearbox sits flush against the frame with no gaps.<\/p>\n<\/div>\n<\/details>\n\nStep 3: Remove Old Gearbox<\/summary>\n\n
Disconnect the PTO driveline from the gearbox input shaft. Support the gearbox weight with a floor jack or overhead hoist (typical weight: 15-70 kg depending on model). Remove all mounting bolts in a criss-cross pattern to relieve clamping stress evenly. Carefully lower the old gearbox and set it aside.<\/p>\n<\/div>\n<\/details>\n\nStep 4: Connect Output to multi-shaft output<\/summary>\n\n
Attach the gearbox output shaft to the combined tillage machine’s multi-shaft output drive coupling. For keyed connections, align the keyway and slide the coupling on, then secure with the retaining bolt and torque to specification. For splined outputs, apply anti-seize to the splines and verify full engagement before locking.<\/p>\n<\/div>\n<\/details>\n\nStep 5: Test Run & Break-In<\/summary>\n\n
Start the tractor and engage the PTO at low RPM (approximately 300 RPM). Listen carefully for any grinding, whining, knocking, or clicking sounds. Run at low speed for 15-20 minutes, monitoring the gearbox housing temperature by hand (carefully). Check for oil leaks at all seals and the mounting interface. Gradually increase to full operating speed.<\/p>\n<\/div>\n<\/details>\n\nStep 6: Prepare the Mounting Surface<\/summary>\n\n
Clean the mounting flange on the combined tillage machine frame with a wire brush and solvent, removing all old sealant, rust, and debris. Inspect the mounting surface for cracks, stripped threads, or warping. Chase any damaged bolt threads with a tap. Apply a thin film of anti-seize compound to the mounting face if specified.<\/p>\n<\/div>\n<\/details>\n\nStep 7: Drain & Document Old Gearbox<\/summary>\n\n
Rep\u00e9rez le bouchon de vidange de la bo\u00eete de vitesses existante et placez un r\u00e9cipient de r\u00e9cup\u00e9ration en dessous. Retirez le bouchon et laissez l'huile s'\u00e9couler compl\u00e8tement. Examinez l'huile afin de d\u00e9tecter la pr\u00e9sence de particules m\u00e9talliques ou une d\u00e9coloration pouvant indiquer une usure interne. Notez la r\u00e9f\u00e9rence de l'ancienne bo\u00eete de vitesses, le diam\u00e8tre des boulons de fixation et les dimensions de l'arbre pour r\u00e9f\u00e9rence.<\/p>\n<\/div>\n<\/details>\n
\u26a0 Important :<\/strong> Always consult the specific installation manual shipped with your Combined Tillage gearbox for model-specific torque values and procedures.<\/p>\n🔎 Diagnostic Checklist \u2014 Combined Tillage Gearbox<\/h2>\n
Use this diagnostic reference to identify and resolve common Combined Tillage gearbox issues in the field. Most problems can be diagnosed and addressed without removing the gearbox from the combined tillage machine.<\/p>\n\n\u26a0 Bruit de grincement ou de sifflement anormal<\/summary>\n\n
Cause probable :<\/strong> Lubrifiant insuffisant ou huile de qualit\u00e9 inad\u00e9quate<\/p>\nAction recommand\u00e9e\u00a0:<\/strong> Vidangez l'huile et v\u00e9rifiez l'absence de particules m\u00e9talliques. Remplissez-la avec l'huile de la viscosit\u00e9 appropri\u00e9e. Si le bruit persiste apr\u00e8s la vidange, une inspection des roulements ou des engrenages est n\u00e9cessaire. Contactez l'assistance technique pour obtenir des instructions de r\u00e9fection.<\/p>\n<\/div>\n<\/details>\n\n\u26a0 Fuite d'huile au niveau des joints d'arbre<\/summary>\n\n
Cause probable :<\/strong> Un niveau d'huile trop \u00e9lev\u00e9 cr\u00e9e une pression interne excessive.<\/p>\nAction recommand\u00e9e\u00a0:<\/strong> V\u00e9rifiez et corrigez d'abord le niveau d'huile\u00a0: un exc\u00e8s d'huile est une cause \u00e9tonnamment fr\u00e9quente de fuites au niveau du joint. Nettoyez ou remplacez le bouchon de reniflard. Si le niveau d'huile est correct et que le reniflard est d\u00e9gag\u00e9, le joint est us\u00e9 et doit \u00eatre remplac\u00e9 \u00e0 l'aide de notre kit de joints.<\/p>\n<\/div>\n<\/details>\n\n⚠ Output Shaft Stops Turning While Input Rotates<\/summary>\n\n
Cause probable :<\/strong> Stripped gear teeth or broken gear<\/p>\nAction recommand\u00e9e\u00a0:<\/strong> Check the overload protection device first \u2014 this is the most likely cause if the gearbox was recently subjected to a sudden overload. Replace the shear bolt or reset the slip clutch per the manual. If overload protection is intact, the gearbox has internal damage and requires professional service.<\/p>\n<\/div>\n<\/details>\n\n\u26a0 Vibrations excessives pendant le fonctionnement<\/summary>\n\n
Cause probable :<\/strong> Joints de cardan us\u00e9s dans la transmission<\/p>\nAction recommand\u00e9e\u00a0:<\/strong> First check all mounting bolt torques \u2014 vibration frequently loosens fasteners, which then amplifies the vibration. Next, inspect the PTO driveline U-joints for wear or binding. Verify driveline angles are within specification. Finally, check the output coupling to the multi-shaft output for wear or damage.<\/p>\n<\/div>\n<\/details>\n\n\u26a0 La bo\u00eete de vitesses produit un claquement m\u00e9tallique lors de l'engagement de la prise de force.<\/summary>\n
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