ISO 9001 Certified…
Harvestore Branded™ parts are engineered and manufactured to strict tolerances so they will perform under extreme conditions. Harvestore Branded service parts manufactured at the DeKalb, Ill., plant are created under processes that meet Quality Standards of ISO 9001 Certification. Only Engineered Storage Products’ authorized dealers have direct access to the complete line of factory specified Harvestore Branded value-priced service parts.

Parts you can count on…

Economizer Chain
The name really says it all. The Economizer chain brings traditional Harvestore Branded parts quality to a very competitively priced cutter chain. It's designed without cotter pins and offers a 100 percent, 12-month/400-hour warranty. Your authorized dealer can give you more information and show you how the Economizer compares with other Harvestore Branded cutter chains.

Harvestore Branded Hooks
There are two styles of hooks. Standard Model 74 hooks were used prior to the introduction of the Goliath II unloader, and offer durability and value. Olympic hooks are 20 percent longer and 30 percent wider than the Model 74 versions, and use a hardened carbon steel pusher bar for more aggressive digging and conveying action. All are forged and welded (not cast) in a welding fixture for proper placement.
NOTE: A full set of hooks is critical for efficient unloader operation. Equally important is the location and sequence of the hooks. Rely on your authorized dealer to help you select the hooks best suited to your operation.

Arm Support Wheels
These heavy-duty arm support wheels are designed to complement a new generation of high-tech floor coverings. Made with a new wear-resistant material, the arm support wheels have 33 percent greater width than previous versions, and an increased depth of hardness for longer service life.

Cutter Arm Outer Sprocket Assembly
The sprocket is made of high quality, tractor-class ductile iron. Teeth are induction hardened for a uniform, consistent surface hardness. The outer case is hardened to a specific depth to create resistance to micro fractures and embrittlement. All raised surfaces are machined smooth to reduce wear and increase service life. In addition to using conventional oil seals to keep out dust and dirt, these sprocket assemblies also use mechanical Labyrinth Seals machined into the sprocket body. These seals “step” into both top and bottom retainers to create 90-degree turns to exclude foreign matter while prolonging grease and bearing life.
CAUTION: Partial replacement of wearing parts is false economy. Do not re-use old sprocket retainers or other worn components.

Pawls
Pawls are often called the “workhorses” of the chain unloader. Pawls must mate exactly with the unloader’s bidirectional ratchet wheel for predictable arm advance and consistent feed delivery. They are manufactured with the same high quality steel and fabrication processes used in Harvestore Branded gears. Attention to details that enhance strength and precision leads to more consistent delivery, less wear and longer part life.

Center Sprocket Assembly
This sprocket’s exacting geometry is the result of years of research into the realm of “material relief”. The design implements a tooth depth and width configuration that helps prevent forage from building up between the cutter chain bushings and sprocket teeth. (Excessive build-up can cause the chain to ride off the sprocket.) Made of high quality, tractor-class ductile iron, the center sprocket is, like the cutter arm sprocket, heat-treated. In addition to using conventional oil seals to keep out dust and dirt, these sprocket assemblies also use mechanical Labyrinth Seals. These seals “step” into an inner sleeve to create 90-degree turns to exclude foreign matter while prolonging grease and bearing life.

Gears, Shafts and Pinions
These gears, shafts and pinions are all fabricated from heat treatable, high quality steel. Gears are machined twice to meet American Gear Manufacturer’s Association tolerances. The first machining comes before each unit is thoroughly hardened, and before the teeth are case hardened, to create much harder, more durable contact surfaces. Parts are then machined a second time, and ground to final tolerances. Because of the attention to strict tolerances and smooth wear surfaces, friction is reduced, extending the overall life of the part.

Cutter Arm Chain Guide
The chain guide is designed to reduce cutter arm wear. These guides are fabricated in a welding fixture so that all angles and dimensions are precise and accurately maintained. Made of abrasion resistant steel throughout, they maintain alignment and resist excess wear for a longer period of time than those made of lesser quality steel. Corners are chamfered to help the chain slide smoothly, a feature that also extends the life of the chain and cutter arm.

Marathon Cutter Chain
Marathon cutter chain is available in three styles: Marathon cutter chain with alloy steel bushings; Marathon SS cutter chain with stainless steel bushings; and Marathon RSS cutter chain, a rebuildable design using stainless steel bushings. Each version features three components: sidebars, bushings and pins. Each component has unique metallurgical requirements for balanced durability and strength.

Cutter Chain Bushings/Pins
As the chain’s hooks dig into compacted forage, the load carried to the hooks is transferred to the bushings as they make contact with the sprocket and are pulled through the forage. Bushings are subjected to repeated stress (wear and corrosion). Marathon alloy steel bushings are case hardened to a specific depth while retaining their ductility. SS and RSS stainless steel bushings are heat treated to a high level of hardness all the way through. Closer pin-to-bushing tolerances — the result of improved tooling — keeps the chain tight and working smoothly.

Cutter Chain Sidebars
Marathon cutter chain features sidebars with a full round bushing design for improved stress distribution and a full contact press fit between the bushing and the sidebar. Extra material on the sidebar means better wear — initial strength around the bushing is 30 percent more than tests show are necessary. Sidebars are heat treated to increase hardness to also increase wear resistance.

Welding the same every time . . .
Fixture welding is a key element in both construction and unloader performance.

Welding Fixtures
These high-tech welding fixtures are used to produce precise welds on such products as cutter arms, backbones, discharge housings, hooks and chain guides. Parts assembled piece-by-piece cannot compare in terms of structural integrity or fit.
Caution!
Using the wrong part, or a part not engineered to meet the demands of the job, jeopardizes the entire operation of your silo and/or unloader. One poor part can cause a domino-effect that can lead to costly downtime. And, using the right tools in the maintenance process can be just as important — the wrong tool can damage otherwise good parts.