What Part Number 50074580 Is and Why It Matters
Part number 50074580 is a blade assembly replacement for Bush Hog rotary cutters — the spinning drum with blades that does the actual cutting. When your cutter stops cutting cleanly, leaves uncut swaths, or the blades are visibly bent or chipped, this part is what you replace. It's not a small blade; it's the entire rotating assembly that holds multiple cutting blades.
Bush Hog is a brand owned by AGCO Corporation and makes rotary mowers used on farms, estates, and roadsides. The 50074580 assembly fits specific Bush Hog models, so confirming your machine's model number before ordering prevents buying the wrong part.
Replacing a worn blade assembly restores cutting performance and prevents the cutter from tearing grass or leaving ragged edges. A dull or damaged assembly also makes the engine work harder, burning more fuel and wearing out faster.
Key Takeaways
- Part number 50074580 is a complete blade assembly, not individual blades, and fits only certain Bush Hog rotary cutter models.
- You can find this part through Bush Hog dealers, online farm equipment suppliers, and sometimes used equipment resellers.
- The price varies by supplier and whether you buy new or used, but budget for both the part and any shipping or installation labor if you don't install it yourself.
- Installation requires removing the old assembly and bolting the new one in place — a task most owners can do with basic tools, though some prefer to have a dealer handle it.
- Keeping your model number and serial number handy makes ordering faster and ensures you get the correct part the first time.
How to Confirm Your Bush Hog Model Uses This Part
The 50074580 assembly fits specific Bush Hog models, and ordering the wrong part wastes time and money. Start by locating your machine's model and serial number — usually stamped on a metal plate welded to the frame near the hitch or on the side of the cutter deck.
Write down both the model number and serial number, then contact a Bush Hog dealer in your area or call AGCO's customer service line. Tell them your model and serial number and ask whether 50074580 is the correct blade assembly for your machine. Many dealers can look this up in seconds and confirm the fit. If you know the year your cutter was made, include that too — it helps narrow down the exact assembly you need.
You can also check your owner's manual if you still have it; the parts diagram usually lists the blade assembly by part number. If you've lost the manual, Bush Hog publishes many of them online through farm equipment documentation sites.
Where to Buy Part Number 50074580
Bush Hog blade assemblies are sold through several channels. Authorized Bush Hog dealers carry them in stock or can order them; they're the safest choice because they verify the part fits your model before you buy. Dealers also often offer installation service if you don't want to do it yourself.
Online farm equipment suppliers like Tractor Supply, Messick's, and Hy-Capacity stock this part and ship nationwide. Prices vary between retailers, so comparing a few quotes before ordering saves money. Some suppliers offer free shipping on orders over a certain amount.
Used equipment resellers and salvage yards sometimes have blade assemblies from machines being parted out. A used assembly costs less but may have less blade life remaining, so inspect it carefully or ask the seller how many hours it has been used.
What to Expect When You Order
Once you've confirmed the part number and found a supplier, ordering is straightforward. You'll need your model number, and the supplier will ask for your shipping address and payment method. Delivery time depends on whether the part is in stock; most dealers ship within one to three business days.
The part itself is heavy — a blade assembly weighs 30 to 50 pounds depending on the model — so shipping costs vary by distance and supplier. Some retailers include shipping in the price; others calculate it at checkout. Budget for this when comparing prices.
When the part arrives, inspect it for damage during shipping. If it arrives bent, cracked, or with missing bolts, contact the supplier when ready for a replacement or refund. Keep the original packaging in case you need to return it.
Installing the New Blade Assembly Yourself
If you're comfortable working on farm equipment, you can install the 50074580 assembly yourself with basic hand tools — usually a socket set, wrenches, and a jack or lift. The job takes one to two hours for someone with experience.
Start by raising the cutter deck safely with a jack and securing it with jack stands — never work under a machine held only by a jack. Remove the bolts holding the old blade assembly to the deck using the correct socket size; take a photo before you start so you remember the bolt pattern. Lift the old assembly out carefully and set it aside.
Position the new assembly under the mounting holes, align the bolt holes, and insert the bolts hand-tight first. Then tighten them in a crisscross pattern — like tightening wheel lugs — to may support even pressure. Tighten to the torque specification listed in your owner's manual if you have a torque wrench; if not, tighten firmly but don't over-tighten, which can strip threads.
Lower the cutter deck slowly and check that the new assembly spins freely by hand. Start the engine and run it at low speed for a minute to make sure everything sounds normal before you mow.
Having a Dealer Install the Part
If you prefer not to install the assembly yourself, a Bush Hog dealer or local farm equipment shop can do it for you. Labor costs vary by location and shop, but expect to pay between $75 and $150 for installation alone, plus the cost of the part.
Call ahead and ask the shop how long the job takes and whether they have the part in stock or need to order it. Some shops can install it the same day if you drop the cutter off in the morning. Ask whether they'll dispose of your old assembly or return it to you — some shops charge a small core fee if you want to keep it.
Having a professional install it also means they'll check other parts of the cutter while it's on the lift, catching wear or damage you might miss.
Cost Factors and Budgeting
The price of part number 50074580 varies based on where you buy it and whether it's new or used. New assemblies from dealers typically cost between $200 and $400, depending on the supplier and your location. Online retailers may offer lower prices, sometimes $150 to $300, but factor in shipping.
Used assemblies cost less — often $75 to $150 — but you're buying whatever blade life remains. If the blades are already half-worn, you'll need to replace them again sooner.
If you're having a dealer install it, add labor costs to the part price. If you're installing it yourself, your only costs are the part and any tools you need to buy. A basic socket set costs $30 to $60 if you don't already own one.
Frequently Asked Questions
How do I know if my blade assembly is actually worn out?
If your cutter leaves uncut strips of grass, tears grass instead of cutting it cleanly, vibrates more than usual, or the blades are visibly bent or chipped, the assembly needs replacement. You can also inspect the blades by hand — if they're dull or damaged, replacement is due.
Can I replace just the blades instead of the whole assembly?
Some Bush Hog models allow you to replace individual blades, but many require replacing the entire assembly. Check your owner's manual or ask a dealer whether blades are sold separately for your model. If they are, replacement blades cost less than a full assembly.
What if I order the part and it doesn't fit my cutter?
Contact the supplier when ready and explain the issue. Most retailers accept returns within 30 days if the part is unused and in original packaging. Keep your receipt and the original box. If a dealer sold you the wrong part, they usually replace it at no charge.
How often do blade assemblies need replacing?
It depends on how often you mow and what you're cutting. Mowing thick brush or rocky ground wears blades faster than mowing open pasture. Most owners replace the assembly every two to four years of regular use, though heavy use may require replacement annually.
Is there a difference between new and used blade assemblies?
A new assembly has full blade life and comes with a warranty from the manufacturer. A used assembly costs less but may have worn blades, meaning you'll replace it sooner. Buy used only if the seller can tell you the hours of use and the blades look sharp.