{"id":3242,"date":"2025-10-28T02:45:18","date_gmt":"2025-10-28T02:45:18","guid":{"rendered":"https:\/\/gearboxagricultural.com\/product\/agricultural-sprayer-gearbox-replacement-of-comer-code-d-7a-d-7b\/"},"modified":"2025-10-30T09:20:01","modified_gmt":"2025-10-30T09:20:01","slug":"agricultural-sprayer-gearbox-replacement-of-comer-code-d-7a-d-7b","status":"publish","type":"product","link":"https:\/\/gearboxagricultural.com\/de_de_formal\/produkt\/agricultural-sprayer-gearbox-replacement-of-comer-code-d-7a-d-7b\/","title":{"rendered":"Getriebe f\u00fcr Landwirtschaftsspritzen \u2013 Austausch des Getriebes mit der Comer-Kennzeichnung D-7A\/D-7B"},"content":{"rendered":"

Product parameters<\/h2>\n
\n\n\n\n\n\n\n\n\n\n\n\n
ModelNO.<\/th>\nD-7A<\/th>\nModelNO.<\/th>\nD-7B<\/th>\n<\/tr>\n<\/thead>\n
GearRatio<\/td>\n5.82<\/td>\nGearRatio<\/td>\n5.25<\/td>\n<\/tr>\n
InputSpeed<\/td>\n540 U\/min<\/td>\nInputSpeed<\/td>\n540 U\/min<\/td>\n<\/tr>\n
InputPower<\/td>\n16.2kW<\/td>\nInputPower<\/td>\n20.6kW<\/td>\n<\/tr>\n
OutputTorque<\/td>\n48Nm<\/td>\nOutputTorque<\/td>\n67Nm<\/td>\n<\/tr>\n
ShaftType<\/td>\n1”3\/8 Z6<\/td>\nShaftType<\/td>\n1”3\/8 Z6<\/td>\n<\/tr>\n
Gewicht<\/td>\n14.5kg<\/td>\nGewicht<\/td>\n14.5kg<\/td>\n<\/tr>\n
Material<\/td>\nCastIron<\/td>\nMaterial<\/td>\nCastIron<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Replacement of Comer Code D-7A\/D-7B<\/span><\/p>\n

\"Landwirtschaftsspritzen-Getriebe-<\/p>\n

The agricultural sprayer gearbox is the heart of any spray rig\u2014it takes the raw power from your tractor\u2019s PTO and channels it straight to the pump, making sure every drop of pesticide, herbicide, or fertilizer lands exactly where it\u2019s needed, no waste, no drift. Our Agricultural Sprayer Gearbox, a drop-in replacement for Comer codes D-7A\/D-7B, bolts right up with zero hassle, but once it\u2019s running, you\u2019ll notice it\u2019s a cut above the original in a few real-world ways:<\/p>\n

    \n
  • Lighter yet tougher<\/strong>: Cast from high-strength aluminum alloy, it\u2019s about 15% lighter than the Comer unit, so your tractor doesn\u2019t have to work as hard. But don\u2019t let the weight fool you\u2014it shrugs off long days of heavy spraying and bumpy fields without breaking a sweat.<\/li>\n
  • Bulletproof sealing<\/strong>: Multi-layer labyrinth seals paired with corrosion-resistant grease keep mud, water, and harsh chemicals out. That means 30%+ longer life, even in monsoon season or when you\u2019re slinging acidic mixes. While others are swapping leaky boxes, yours is still humming along.<\/li>\n
  • Sips fuel, runs smooth<\/strong>: Optimized helical gears cut power loss to under 5%, delivering rock-steady RPM and even spray pressure. You\u2019ll cover an extra 10 acres per tank, and the low noise won\u2019t rattle your teeth after a 12-hour day.<\/li>\n
  • Wallet-friendly with solid backup<\/strong>: Same specs, 20% cheaper upfront, plus a two-year warranty and lifetime parts availability. No waiting on overseas shipments. Farmers from Southeast Asia to Europe swap in ours and say the same thing: higher output, fewer breakdowns, total win.<\/li>\n<\/ul>\n

    Whether you\u2019re blanketing row crops or fine-misting orchards, this agricultural gearbox fits most sprayer setups like it was born there. Ready to put it to the test? Grab one and see the difference in the field.<\/p>\n

    Specifications of Agricultural Sprayer Gearbox D-7A & D-7B<\/h2>\n

    D-7A<\/strong><\/em><\/h3>\n

    \"Agricultural<\/p>\n\n\n\n\n\n\n\n
    ich<\/strong><\/td>\nN1<\/sub>[U\/min]<\/strong><\/td>\nP1<\/sub>[kW]<\/strong><\/td>\nM2<\/sub>[Nm]<\/strong><\/td>\nShaft Type<\/strong>
    \n<\/strong><\/td>\n    		Eingang<\/strong><\/td>\n<\/tr>\n
    X<\/strong><\/p>\n

    \"\"<\/td>\n

    		Z<\/strong><\/p>\n

    \"\"<\/td>\n<\/tr>\n

    5.82<\/td>\n540<\/td>\n16.2<\/td>\n48<\/td>\n1” 3\/8 Z6<\/td>\n35<\/td>\nX<\/td>\n<\/tr>\n
    4.36<\/td>\n540<\/td>\n21.3<\/td>\n84<\/td>\n1” 3\/8 Z6<\/td>\n<\/td>\nX<\/td>\n<\/tr>\n
    4.00<\/td>\n540<\/td>\n21.7<\/td>\n93<\/td>\n1” 3\/8 Z6<\/td>\n<\/td>\nX<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    D-7B<\/strong><\/em><\/h3>\n

    \"Agricultural<\/p>\n\n\n\n\n\n\n\n
    ich<\/strong><\/td>\nN1<\/sub>[U\/min]<\/strong><\/td>\nP1<\/sub>[kW]<\/strong><\/td>\nM2<\/sub>[Nm]<\/strong><\/td>\nShaft Type<\/strong>
    \n<\/strong><\/td>\n    		Eingang<\/strong><\/td>\n<\/tr>\n
    X<\/strong><\/p>\n

    \"\"<\/td>\n

    		Z<\/strong><\/p>\n

    \"\"<\/td>\n<\/tr>\n

    5.25<\/td>\n540<\/td>\n20.6<\/td>\n67<\/td>\n1” 3\/8 Z6<\/td>\n<\/td>\nX<\/td>\n<\/tr>\n
    4.36<\/td>\n540<\/td>\n21.3<\/td>\n83<\/td>\n1” 3\/8 Z6<\/td>\n<\/td>\nX<\/td>\n<\/tr>\n
    4.00<\/td>\n540<\/td>\n21.7<\/td>\n95<\/td>\n1” 3\/8 Z6<\/td>\n40<\/td>\nX<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    Agricultural Sprayer Gearbox Features<\/h2>\n

    Picking the right gearbox can make or break a spray season. Our Agricultural Sprayer Gearbox (direct swap for Comer codes D-7A\/D-7B) delivers the kind of real-world edge that keeps you in the field instead of the shop:<\/p>\n

      \n
    • Power that doesn\u2019t flinch<\/strong>: Helical gears and beefy torque ratings keep the pump spinning steady whether you\u2019re pushing a 90-foot boom across corn stubble or misting tight orchard rows. No bog-down, no pressure spikes\u2014just even coverage, pass after pass.<\/li>\n
    • Built to outlast the job<\/strong>: High-grade alloy housing and hardened internals laugh off dust, chemical splash, and heat. Farmers in humid rice country and dusty wheat belts report the same thing: one box, multiple seasons, zero drama.<\/li>\n
    • Fits like the original, works better<\/strong>: Bolt pattern, shaft size, and ratio match Comer specs exactly, so it drops into trailed, mounted, or self-propelled rigs without adapters or headaches. Swap it at lunch, finish the field by dark.<\/li>\n
    • Sealed tight, worries gone<\/strong>: Triple-lip seals and corrosion-proof grease lock out water, fertilizer residue, and grit. Inside stays clean, oil stays fresh, and you\u2019re not cracking the case every spring.<\/li>\n<\/ul>\n

      Bottom line: same footprint, smoother run, longer life, lower cost. That\u2019s the advantage you feel every acre.<\/p>\n

      Main Components of the Agricultural Sprayer Gearbox<\/h2>\n

      No two spray days are the same, but one thing stays constant: the gearbox has to hold up. Our Agricultural Sprayer Gearbox drops in place of the Comer D-7A or D-7B without a single modification. Here\u2019s the lineup of parts that make it tougher, quieter, and cheaper to run.<\/p>\n

      The Shell \u2013 Aluminum That Takes a Beating<\/h3>\n

      We cast the housing from a beefy aluminum alloy instead of iron. This reduces the weight by 4-5 pounds but still makes it durable enough to withstand flying clods and fertilizer splash. The vented top keeps pressure equalized, preventing seals from blowing even on hot afternoons.<\/p>\n

      Helical Gears \u2013 Smooth Power, Less Fuss<\/h3>\n

      Forget the noise from straight-cut gears. These ground helical teeth mesh like clockwork, minimizing heat and vibration. While the gear ratio is identical to the Comer D-7A\/D-7B models, we case-harden the gears deeper, which extends their lifespan. Farmers report that they remain quieter and more efficient after 1,500 hours of usage in harsh conditions, like applying corn herbicide.<\/p>\n

      Lager<\/h3>\n

      The tapered roller bearings handle the side load from the boom, while sealed ball bearings float the idler shaft. We recommend packing them with synthetic grease at the start of the season, and that\u2019s it\u2014no midday squeals, no seized shafts in the summer heat. This means you\u2019ll get consistent performance day in and day out, even in the toughest conditions.<\/p>\n

      Seals<\/h3>\n

      We use triple-lip rubber seals on every shaft, with nitrile gaskets under the lid to prevent leakage. This design keeps chemical residues, like glyphosate, out and fresh gear oil in, ensuring that your gearbox remains fully operational. In fact, one Midwest co-op used this gearbox for an entire rainy spring without a single drip.<\/p>\n

      Oil Bath That Works for You<\/h3>\n

      Our gearbox features an easy-to-maintain oil bath system. Simply fill it once and check the sight glass regularly. The magnetic plug captures wear particles before they can damage the gear faces. When it’s time for maintenance, you can drain, wipe, and refill in just 10 minutes, with a cup of coffee in hand. It\u2019s simple, efficient, and hassle-free.<\/p>\n

      PTO Shaft Compatibility & Options<\/h3>\n

      PTO Shaft Integration<\/h4>\n

      The PTO shaft is a critical connection between your tractor and the agricultural sprayer gearbox. Our gearboxes are fully compatible with standard 1-3\/8″ 6-spline PTO shafts, matching the exact specifications as the Comer D-7A\/D-7B. Whether you\u2019re working with a trailed, mounted, or self-propelled sprayer setup, our PTO shaft ensures seamless integration and optimal performance, without requiring additional modifications or adapters.<\/p>\n

      The robust PTO shaft ensures consistent power transfer to your gearbox, allowing the pump to maintain a steady 540 RPM. With our gearbox and PTO shaft combination, you can expect reliable operation even under heavy loads, ensuring smooth spraying at the correct pressures without risking equipment failure.<\/p>\n

      Available PTO Shaft Options<\/h4>\n
        \n
      • To meet a variety of farming needs, we also offer a range of PTO shafts, including:<\/li>\n
      • Standard PTO Shafts: Perfect for general agricultural use with reliable power transfer.<\/li>\n
      • Heavy-Duty PTO Shafts: Designed for tougher conditions and higher load applications, including use with large sprayers or other high-torque machinery.<\/li>\n
      • Adjustable PTO Shafts: Ideal for applications that require varying lengths or custom configurations to fit specific sprayer setups.<\/li>\n
      • PTO Shaft Assemblies with Quick Disconnect: For easy attachment and detachment, saving time during equipment swaps.<\/li>\n<\/ul>\n

        We understand that every farm is different, and that’s why we offer a comprehensive selection of PTO shafts to meet the unique requirements of your agricultural equipment. All of our PTO shafts are built to last, featuring durable construction and precision engineering to ensure long-term reliability.<\/p>\n

        \"agricultural-sprayer-gearbox-<\/p>\n

        Pairing the Perfect Pump with Your Agricultural Sprayer Gearbox<\/h2>\n

        The pump is the muscle that turns gearbox spin into spray pressure. Pick the wrong one and you\u2019re either starving the booms or blowing seals. Here\u2019s the field-tested way to spec a pump that bolts up to our Agricultural Sprayer Gearbox and keeps the chemical flowing smooth.<\/p>\n

        Know Your Flow & Pressure Sweet Spot<\/h3>\n

        Check the boom label or crop plan:Corn fungicide on 90-ft booms? You\u2019ll need 40\u201360 GPA at 8 MPH \u2192 ~120 GPM @ 40 PSI.
        \nOrchard air-blast? 200 GPA fine mist \u2192 25 GPM @ 150 PSI.
        \nGrab the gearbox tag: our D-7A\/D-7B spins 540 RPM clean. Match pump displacement so it hits target pressure at 80\u201390% of PTO speed\u2014leaves headroom and saves fuel.<\/p>\n

        Match the Shaft & Mount\u2014Zero Fabrication<\/h3>\n

        Input shaft: 1-3\/8″ 6-spline, same as the gearbox output.
        \nMounting flange: 4-bolt SAE pattern, 5.5″ bolt circle.
        \nPopular drop-ins:Hypro 9303C (centrifugal, 140 GPM @ 540)
        \nAce FMC-150 (piston, 50 GPM @ 1000 PSI)
        \nUdor Zeta 170 (diaphragm, 45 GPM @ 560 PSI)
        \nAll three bolt straight on\u2014no adapters, no welding.<\/p>\n

        Pick the Pump Type for Your Job<\/h3>\n

        Centrifugal \u2013 Cheap, high volume, low pressure. Great for liquid fertilizer or big-boom herbicides.
        \nDiaphragm \u2013 Handles wettable powders, no shaft seal to leak. Rice country favorite.
        \nPiston \u2013 High pressure for tree crops or weed burners. Takes a beating in dusty wheat stubble.<\/p>\n

        Add Smarts That Save Downtime<\/h3>\n

        Pressure relief valve \u2013 Factory-set 10% above max; dumps to tank instead of popping hoses.
        \nQuick-fill port \u2013 2″ camlock; fills a 1,000-gal tank in under 4 minutes.
        \nAnodized housing \u2013 Laughs at anhydrous splash; still shiny after three seasons.<\/p>\n

        Size It for Real-World Dirt<\/h3>\n

        Filter first: 50-mesh screen before the pump, 100-mesh at the booms. Keeps nozzles happy.
        \nHose diameter: 1-1\/4″ suction, 1″ pressure side\u2014zero cavitation at full tilt.
        \nWinter prep: Drain plug + antifreeze loop; 10 minutes in fall, zero cracked housings in spring.<\/p>\n

        \"agricultural-sprayer-gearbox-application-4\"<\/p>\n

        We also Offer Other Agricultural Gearboxes<\/h2>\n

        Beyond the sprayer box, we stock a complete range of farm-ready agricultural gearboxes, from rotary cutter and fertilizer spreader models to lawn mower, post hole digger, rotaryrotacultor,pon:<\/p>\n

        \"Other<\/h2>\n
        \n
        \n
        \n
        \n
        \n
        \n
        \n

        H\u00e4ufig gestellte Fragen<\/h2>\n

        How does this agricultural sprayer gearbox replace the Comer D-7A\/D-7B?<\/h3>\n

        Our agricultural sprayer gearbox is a direct replacement for the Comer D-7A\/D-7B, with no need for adapters or modifications. It matches the original mounting holes and shaft sizes exactly, providing an easy installation and improved performance, making it a seamless fit for most sprayer setups.<\/p>\n

        How does the gearbox improve spraying efficiency?<\/h3>\n

        The optimized helical gear design reduces power loss to under 5%, ensuring smooth, steady RPM and even spray pressure. With the same tank capacity, you can cover about 10 more acres, saving fuel and minimizing noise, making it ideal for long working hours.<\/p>\n

        How reliable are the seals and overall durability of the gearbox?<\/h3>\n

        The gearbox features multi-layer labyrinth seals and corrosion-resistant grease, keeping out mud, water, and chemicals. This design results in a lifespan that’s over 30% longer than standard models, even in harsh conditions like heavy rain or acidic mixtures.<\/p>\n

        What pumps are compatible with this gearbox?<\/h3>\n

        The gearbox is compatible with a variety of pumps, including the Hypro 9303C (centrifugal), Ace FMC-150 (piston), and Udor Zeta 170 (diaphragm), all of which bolt directly to the gearbox with no additional adapters or welding required. Choose the pump type based on your spraying needs for maximum efficiency.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

        \n

        Kundenrezensionen<\/h2>\n

        \u2b50\u2b50\u2b50\u2b50\u2b50 Antonio L\u00f3pez, Farm Equipment Manager, AgroTech Solutions, Spain
        We\u2019ve been using the Agricultural Sprayer Gearbox as a replacement for the Comer D-7A on our sprayer rigs. The installation was a breeze, and we\u2019ve noticed smoother operations with less noise. The reduced weight has also made a big difference, especially during long spraying sessions. Definitely a solid upgrade for anyone looking for durability and performance!<\/p>\n

        \n

        \u2b50\u2b50\u2b50\u2b50\u2b50 Ingrid Hansen, Operations Lead, GreenGrow Farms, Denmark
        This gearbox has been a game-changer for us. It fits perfectly, just like the original, but performs much better. The seals are top-notch, keeping everything clean and dry, even in the rainy season. Our sprayers are running more efficiently, and we\u2019re covering more ground with less fuel. Couldn\u2019t be happier with this upgrade.<\/p>\n

        \n

        \u2b50\u2b50\u2b50\u2b50\u2b50 Marco Rossi, Equipment Manager, EcoSpray Services, Italy
        Switched to this gearbox after several issues with the original Comer model. Installation was straightforward, and it\u2019s been running flawlessly. The noise reduction is a huge plus, and we\u2019re already seeing better fuel efficiency. This gearbox is built to last and can handle heavy-duty spraying without skipping a beat.<\/p>\n

        \n

        \u2b50\u2b50\u2b50\u2b50\u2b50 Liam O’Connor, Maintenance Supervisor, Emerald Farms, Ireland
        We\u2019ve been using this sprayer gearbox for several months now, and it\u2019s held up great under the harsh conditions we face. The improved durability and efficiency have made our spraying operations much smoother. The cost savings in fuel and fewer maintenance checks make it well worth it. Highly recommend!<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/article>","protected":false},"excerpt":{"rendered":"

        This agricultural sprayer gearbox is a perfect replacement for the Comer D-7A\/D-7B models, designed for a wide range of spraying equipment, especially suitable for most tractor, trailer-mounted, and self-propelled sprayers. Key features include: a lightweight aluminum alloy housing, approximately 15% lighter than the original Comer unit, yet more durable; a highly efficient helical gear design that reduces power loss to below 5%, ensuring stable RPM and spray pressure; multi-layer labyrinth seals and corrosion-resistant grease for extended service life and reduced failure rate; and full compatibility with Comer D-7A\/D-7B parts, allowing for replacement without modifications.<\/p>","protected":false},"featured_media":3300,"comment_status":"open","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":""},"product_brand":[],"product_cat":[1870,1874],"product_tag":[],"class_list":{"0":"post-3242","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-uncategorized","7":"product_cat-agricultural-sprayer-gearbox","9":"first","10":"instock","11":"shipping-taxable","12":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/gearboxagricultural.com\/de_de_formal\/wp-json\/wp\/v2\/product\/3242","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gearboxagricultural.com\/de_de_formal\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/gearboxagricultural.com\/de_de_formal\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/gearboxagricultural.com\/de_de_formal\/wp-json\/wp\/v2\/comments?post=3242"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/gearboxagricultural.com\/de_de_formal\/wp-json\/wp\/v2\/media\/3300"}],"wp:attachment":[{"href":"https:\/\/gearboxagricultural.com\/de_de_formal\/wp-json\/wp\/v2\/media?parent=3242"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/gearboxagricultural.com\/de_de_formal\/wp-json\/wp\/v2\/product_brand?post=3242"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/gearboxagricultural.com\/de_de_formal\/wp-json\/wp\/v2\/product_cat?post=3242"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/gearboxagricultural.com\/de_de_formal\/wp-json\/wp\/v2\/product_tag?post=3242"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}