Big Bale Specialists · In-house manufactured

Baler parts built to outlast the OEM.

Name: Hesston / MF Big Square Baler Parts
Brand: Maize Corporation
Availability: InStock

Twenty-one wear parts and upgrade kits we cut, weld, hard-face and heat-treat in Maize, Kansas. From Rasspe knotter heads customers prove out against the OEM at a fraction of the cost, to the perforated feeder pan that stops rocks before they trip the stuffer, to a slacker spring with 50 percent more rate for heavier twine.

Hesston 4750 to 4910 MF 2150 to 2290 Case IH 8570 to 8590 AGCO 7333 to 7444 Challenger LB33 to LB44 Challenger 2250 to 2290

Get a Quote Call 888.722.8710

Green tractor towing a New Holland small square bale wagon loaded with fresh green hay bales in a Southern US pasture, a wooden barn behind the treeline

50%

more spring rate on the heavy upper slacker

Jump to a system

Customer favorites

The three kits producers come back for.

Higher-cycle wear points where a smart aftermarket build genuinely lifts a big square operation.

Yellow round baler dropping a fresh round bale beside a green John Deere tractor at the edge of a wooded pasture

Pickup Reel

Double Cam Reel Kit

Converts single-cam pickup to double for a smoother lift. Two-piece tine bars, center support bearings, left and right cam tracks with followers. Template included.

Hesston 4750, 4755, 4900, early 4910 · Case IH 8570, 8575, 8580, early 8590

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Yellow round baler behind a green John Deere tractor working freshly cut hay across a golden pasture with a farmhouse in the distance

Pickup Reel

Five-Bar Reel Kit

Adds a fifth tine bar so the pickup keeps up on light windrows at high ground speeds. Ships as a full conversion for a four-bar reel.

MF 2150 to 2290 · AGCO 7433, 7434, 7444 · Challenger LB33-B to LB44-B, 2250 to 2290

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Green John Deere 864 round baler wrapping a fresh round bale in a US hay field at golden hour

Knotter

Knotter Blower Kit

Keeps the knotter area clear of crop buildup so you cut miss ties. Retrofit for balers that did not come factory equipped with a knotter blower.

Hesston 4750 to 4910 · Case IH 8570 to 8590

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In-house manufactured · Kansas

Every wear point on a Hesston big square, in one catalog.

Do not see the model? Call. Fifty seasons in and we still cover most of them.

Packer Crank

Packer Crank Update Kit

Same segmented packer-crank design that runs on the 2100 and 2200 series MF balers. Longer life, lower maintenance, better serviceability.

Hesston 4750 to 4910 · Case IH 8570 to 8590

Complete Packer Crank Assembly

Fully built packer-crank assemblies for the 2100 and 2200 series AGCO 3x4 and 4x4 balers. Ships ready to hang.

MF 2170 to 2290 · AGCO 7434, 7444, 2170, 2190 · Challenger LB34-B, LB34-BXD, LB44-B, 2270 to 2290

Hard-Faced Packer Crank Fingers

Contact face is hard surfaced for wear resistance and longer service life between rebuilds.

Fits Hesston and MF big square packer-crank assemblies. Call to confirm your build.

Pickup Reel

Complete Pickup Assembly

Fully assembled pickups for the 2100 and 2200 series MF balers. One line item, ready to bolt on.

MF 2150 to 2290 · AGCO 7433, 7434, 7444 · Challenger LB33-B to LB44-B, 2250 to 2290

Heavy-Duty Square Pickup Tines

Square rod instead of round. More durable and better at pulling the crop in on tough windrows.

Hesston 4550 to 4910 · Case IH 8520 to 8590 · MF 1835 to 2290 · AGCO 2150 to 7444 · Challenger LB33 to 2290

Replacement Wrapper Tab

Wrapper tab that welds onto the pickup reel frame in place of the failed one.

Fits Hesston / MF big square pickup-reel frames. Call to confirm your build.

Knotter

Rasspe Knotter Heads

Direct replacement for all AGCO big square knotter heads. Tight tolerances, chromatized or galvanized parts for longer service life. Customer-proven to outperform OEM at a fraction of the cost.

All AGCO big square balers · Finish: chromatized or galvanized

Twine System

Twine Tube Kits

Guides twine all the way up to the tensioner rollers so it stops running off the side.

Hesston 4750 to 4910 · Case IH 8570 to 8590 · MF 2150 to 2290 · AGCO 7333 to 7444 · Challenger LB33 to 2290

Improved Twine Finger Rods and Bolt-on Rod Ends

Heat-treated twine finger rod that resists bending. Stable connection for finer adjustment, less wear and cut miss ties.

Hesston 4750 to 4910 · Case IH 8570 to 8590 · MF 2150 to 2290 · AGCO 7333 to 7444 · Challenger LB33 to LB44

Twine Finger with Bearing

Sealed bearing replaces the bushing. Bolts on using the existing hardware.

Hesston 4750 to 4910 · Case IH 8570 to 8590 · AGCO 7333, 7430 · Challenger LB33, LB34, LB44

Heavy Upper Slacker Spring

Fifty percent more spring rate. Best when you are running heavier twines.

Fits Hesston / MF big square upper slacker positions. Call to confirm your build.

Feeder Pan

Perforated Feeder Pans

Lets dirt and rocks fall through before the crop enters the pre-forming chamber. Prevents stuffer trip-door jams, buildup in the compression chamber and unwanted material in the finished bale.

Hesston 4750 to 4910 · Case IH 8570 to 8590 · MF 2150 to 2290 · AGCO 7333 to 7444 · Challenger LB33 to 2290

Stuffer

Replacement Stuffer Crank Shaft

Replacement shaft that welds into the existing clutch arm.

Fits Hesston / MF big square stuffer clutch arms. Call to confirm your build.

Stuffer Arm Cam Bearing Mount Repair Kit

Weld-in bearing mount plates that replace the worn, oversized bearing-stud holes.

Fits Hesston / MF big square stuffer arm assemblies. Call to confirm your build.

Bale Chamber

Plastic Slides

Fills the lower corners along the length of the bale chamber. Stops material buildup when you are baling corn stover.

MF 2170, 2170XD, 2190, 2270, 2270XD, 2290 · AGCO 7434, 7444, 2170, 2190 · Challenger LB34-B, LB34-BXD, LB44-B, 2270 to 2290

Hitch

Cat 4 Hitch Kits

Everything needed to hook a baler to a John Deere tractor with a Category 4 drawbar.

John Deere tractors with Category 4 drawbar

3x3 Hitch Update Kit

Updates the early 3x3 baler hitches to the more robust ball design found on Hesston 4760 balers.

Early 3x3 Hesston big square balers

Electronics

First-Generation Baler ISO Conversion Kit

ISO electronic conversion for all Dynalco-controlled large square balers. Easy install using the existing main harness.

All Dynalco-controlled large square balers

Rasspe knotter heads that outperform OEM at a fraction of the cost.

Customer proven. Same day shipped from Maize, Kansas.

Fitment

What we cover, at a glance.

System	Hesston	MF	Case IH	AGCO	Challenger
Packer crank	4750 to 4910	2170 to 2290	8570 to 8590	7434, 7444, 2170, 2190	LB34-B, LB34-BXD, LB44-B, 2270 to 2290
Pickup reel	4750 to 4910	2150 to 2290	8570 to 8590	2150 to 7444	LB33 to LB44, 2250 to 2290
Knotter (Rasspe)	all AGCO-knotter balers	all AGCO-knotter balers	n/a	all big square	all big square
Twine system	4750 to 4910	2150 to 2290	8570 to 8590	7333 to 7444	LB33 to LB44
Feeder pan	4750 to 4910	2150 to 2290	8570 to 8590	7333 to 7444	LB33 to 2290
Bale chamber	n/a	2170 to 2290	n/a	7434, 7444, 2170, 2190	LB34-B, LB44-B, 2270 to 2290
Hitch	Early 3x3, Cat 4	n/a	n/a	n/a	n/a
Electronics (ISO)	Dynalco controlled	Dynalco controlled	Dynalco controlled	Dynalco controlled	Dynalco controlled

Do not see your model? Call. We probably still cover it.

Common Hesston / MF questions.

Good to know

Yes. The Hesston / MF catalog covers Hesston 4750 through 4910, MF 2150 through 2290, Case IH 8570 through 8590, AGCO 7333 through 7444 and Challenger LB33 through LB44 and 2250 through 2290. Call with the exact model and year and we confirm the fitment before we ship.

They are a direct-fit replacement for all AGCO big square knotter heads, produced to tight tolerances with chromatized or galvanized parts. Customer proven to outperform OEM at a fraction of the cost, but they are aftermarket, not factory-supplied.

Orders placed by the afternoon cutoff go out same day by UPS, FedEx or motor carrier from Maize, KS. Weekend orders ship Monday.

Yes. Fifty seasons of Hesston, MF, Case IH, AGCO and Challenger history means we usually know a workaround, even for early 3x3 balers and out-of-catalog stuffer arm builds.

Both. We ship complete packer crank and pickup assemblies ready to bolt on, single components like twine fingers or slacker springs, and weld-in repair kits for the stuffer arm cam bearing mount.

One phone number, fifty seasons

Have the model number? We ship the part.

Send the fitment. We confirm and ship the same day.

Get a Quote Call 888.722.8710