Opis
Product parameters
| Model nr. | D-7A | Model nr. | D-7B |
|---|---|---|---|
| GearRatio | 5.82 | GearRatio | 5.25 |
| InputSpeed | 540 obr./min | InputSpeed | 540 obr./min |
| Moc wejściowa | 16.2kW | Moc wejściowa | 20.6kW |
| OutputTorque | 48Nm | OutputTorque | 67Nm |
| ShaftType | 1”3/8 Z6 | ShaftType | 1”3/8 Z6 |
| Waga | 14.5kg | Waga | 14.5kg |
| Tworzywo | CastIron | Tworzywo | CastIron |
Replacement of Comer Code D-7A/D-7B
The agricultural sprayer gearbox is the heart of any spray rig—it takes the raw power from your tractor’s PTO and channels it straight to the pump, making sure every drop of pesticide, herbicide, or fertilizer lands exactly where it’s 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’s running, you’ll notice it’s a cut above the original in a few real-world ways:
- Lighter yet tougher: Cast from high-strength aluminum alloy, it’s about 15% lighter than the Comer unit, so your tractor doesn’t have to work as hard. But don’t let the weight fool you—it shrugs off long days of heavy spraying and bumpy fields without breaking a sweat.
- Bulletproof sealing: 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’re slinging acidic mixes. While others are swapping leaky boxes, yours is still humming along.
- Sips fuel, runs smooth: Optimized helical gears cut power loss to under 5%, delivering rock-steady RPM and even spray pressure. You’ll cover an extra 10 acres per tank, and the low noise won’t rattle your teeth after a 12-hour day.
- Wallet-friendly with solid backup: 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.
Whether you’re 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.
Specifications of Agricultural Sprayer Gearbox D-7A & D-7B
D-7A
| I | N1[obr./min] | P1[kW] | M2[Nm] | Shaft Type |
Wejście | |
| X
|
Z
|
|||||
| 5.82 | 540 | 16.2 | 48 | 1” 3/8 Z6 | 35 | X |
| 4.36 | 540 | 21.3 | 84 | 1” 3/8 Z6 | X | |
| 4.00 | 540 | 21.7 | 93 | 1” 3/8 Z6 | X | |
D-7B
| I | N1[obr./min] | P1[kW] | M2[Nm] | Shaft Type |
Wejście | |
| X
|
Z
|
|||||
| 5.25 | 540 | 20.6 | 67 | 1” 3/8 Z6 | X | |
| 4.36 | 540 | 21.3 | 83 | 1” 3/8 Z6 | X | |
| 4.00 | 540 | 21.7 | 95 | 1” 3/8 Z6 | 40 | X |
Agricultural Sprayer Gearbox Features
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:
- Power that doesn’t flinch: Helical gears and beefy torque ratings keep the pump spinning steady whether you’re pushing a 90-foot boom across corn stubble or misting tight orchard rows. No bog-down, no pressure spikes—just even coverage, pass after pass.
- Built to outlast the job: 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.
- Fits like the original, works better: 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.
- Sealed tight, worries gone: Triple-lip seals and corrosion-proof grease lock out water, fertilizer residue, and grit. Inside stays clean, oil stays fresh, and you’re not cracking the case every spring.
Bottom line: same footprint, smoother run, longer life, lower cost. That’s the advantage you feel every acre.
Main Components of the Agricultural Sprayer Gearbox
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’s the lineup of parts that make it tougher, quieter, and cheaper to run.
The Shell – Aluminum That Takes a Beating
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.
Helical Gears – Smooth Power, Less Fuss
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.
Bearings
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’s it—no midday squeals, no seized shafts in the summer heat. This means you’ll get consistent performance day in and day out, even in the toughest conditions.
Seals
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.
Oil Bath That Works for You
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’s simple, efficient, and hassle-free.
PTO Shaft Compatibility & Options
PTO Shaft Integration
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’re 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.
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.
Available PTO Shaft Options
- To meet a variety of farming needs, we also offer a range of PTO shafts, including:
- Standard PTO Shafts: Perfect for general agricultural use with reliable power transfer.
- Heavy-Duty PTO Shafts: Designed for tougher conditions and higher load applications, including use with large sprayers or other high-torque machinery.
- Adjustable PTO Shafts: Ideal for applications that require varying lengths or custom configurations to fit specific sprayer setups.
- PTO Shaft Assemblies with Quick Disconnect: For easy attachment and detachment, saving time during equipment swaps.
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.
Pairing the Perfect Pump with Your Agricultural Sprayer Gearbox
The pump is the muscle that turns gearbox spin into spray pressure. Pick the wrong one and you’re either starving the booms or blowing seals. Here’s the field-tested way to spec a pump that bolts up to our Agricultural Sprayer Gearbox and keeps the chemical flowing smooth.
Know Your Flow & Pressure Sweet Spot
Check the boom label or crop plan:Corn fungicide on 90-ft booms? You’ll need 40–60 GPA at 8 MPH → ~120 GPM @ 40 PSI.
Orchard air-blast? 200 GPA fine mist → 25 GPM @ 150 PSI.
Grab the gearbox tag: our D-7A/D-7B spins 540 RPM clean. Match pump displacement so it hits target pressure at 80–90% of PTO speed—leaves headroom and saves fuel.
Match the Shaft & Mount—Zero Fabrication
Input shaft: 1-3/8″ 6-spline, same as the gearbox output.
Mounting flange: 4-bolt SAE pattern, 5.5″ bolt circle.
Popular drop-ins:Hypro 9303C (centrifugal, 140 GPM @ 540)
Ace FMC-150 (piston, 50 GPM @ 1000 PSI)
Udor Zeta 170 (diaphragm, 45 GPM @ 560 PSI)
All three bolt straight on—no adapters, no welding.
Pick the Pump Type for Your Job
Centrifugal – Cheap, high volume, low pressure. Great for liquid fertilizer or big-boom herbicides.
Diaphragm – Handles wettable powders, no shaft seal to leak. Rice country favorite.
Piston – High pressure for tree crops or weed burners. Takes a beating in dusty wheat stubble.
Add Smarts That Save Downtime
Pressure relief valve – Factory-set 10% above max; dumps to tank instead of popping hoses.
Quick-fill port – 2″ camlock; fills a 1,000-gal tank in under 4 minutes.
Anodized housing – Laughs at anhydrous splash; still shiny after three seasons.
Size It for Real-World Dirt
Filter first: 50-mesh screen before the pump, 100-mesh at the booms. Keeps nozzles happy.
Hose diameter: 1-1/4″ suction, 1″ pressure side—zero cavitation at full tilt.
Winter prep: Drain plug + antifreeze loop; 10 minutes in fall, zero cracked housings in spring.
We also Offer Other Agricultural Gearboxes
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:
Często zadawane pytania
How does this agricultural sprayer gearbox replace the Comer D-7A/D-7B?
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.
How does the gearbox improve spraying efficiency?
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.
How reliable are the seals and overall durability of the gearbox?
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.
What pumps are compatible with this gearbox?
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.
Opinie klientów
⭐⭐⭐⭐⭐ Antonio López, Farm Equipment Manager, AgroTech Solutions, Spain
We’ve 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’ve 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!
⭐⭐⭐⭐⭐ 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’re covering more ground with less fuel. Couldn’t be happier with this upgrade.
⭐⭐⭐⭐⭐ Marco Rossi, Equipment Manager, EcoSpray Services, Italy
Switched to this gearbox after several issues with the original Comer model. Installation was straightforward, and it’s been running flawlessly. The noise reduction is a huge plus, and we’re already seeing better fuel efficiency. This gearbox is built to last and can handle heavy-duty spraying without skipping a beat.
⭐⭐⭐⭐⭐ Liam O’Connor, Maintenance Supervisor, Emerald Farms, Ireland
We’ve been using this sprayer gearbox for several months now, and it’s 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!
