Steering Wheel H 067.027

Steering Wheel H 067.027 of ZM-60/60A Steering System

The H 067.027 steering wheel is the primary manual control element for the direction of movement, which came standard on classic ZM-60, ZM-60A series grain loaders and their early modifications. In the general kinematic layout of the undercarriage, this massive part performs the function of a primary lever — it directly accepts the operator's muscular effort and transmits it to the vertical sprocket shaft (ZP 01.330), which turns the unit's front wheel strut via a chain drive.

Manufactured using gray cast iron casting methods (SCH 20), this steering wheel is distinguished by its significant weight (3.7 kg) and high spatial rigidity. This massive design allows it to withstand constant torsional (twisting) loads without deformation while maneuvering the heavy grain loader on the threshing floor area.

The main engineering feature of the original classic design is the mounting method of the steering wheel onto the sprocket shaft. Unlike modern modernized versions (where a keyway is used), the cast iron H 067.027 steering wheel features a smooth bore and is fixed to the sprocket shaft using a through metal pin. It is this connection that absorbs all operational loads when turning the wheels; however, because the factory pin frequently worked under shear from constant jerks and quickly crushed, many farms modified this assembly independently — the through hole was re-drilled for a stronger clamping bolt (usually M10), or a full-fledged keyway was milled in the steering wheel hub for a stiffer and more reliable torque transmission without backlashes.

Technical Specifications of Steering Wheel H 067.027

• Catalog number: H 067.027
• Manufacturing material: Gray cast iron SCH 20 (in accordance with GOST 1412-79)
• Product weight: 3.7 kg
• Mounting seat type: Smooth hub with a through hole
• Application: Classic ZM-60 and ZM-60A grain loaders

Structurally, the H 067.027 steering wheel is a massive cast product with a classic shape featuring a rim and spokes for a comfortable grip by the operator's hands. The use of gray cast iron (SCH 20) provides the part with high spatial rigidity and considerable weight (3.7 kg), which partially acts as a flywheel, helping to smooth out jerks and overcome the resistance of the heavy wheel base during turns. However, cast iron has a significant natural drawback — brittleness; therefore, from accidental hard impacts or dropped tools, the spokes or the rim of the steering wheel can easily crack. Considering this, custom homemade steering wheels welded from steel pipes or rods, which are more resistant to impact deformations, or modifications with an increased outer diameter acting as a larger lever to reduce the machine operator's physical effort, can often be found on threshing floors.

Analyzing the operational shortcomings of the classic pin mount and the brittleness of old cast iron casting, Zavod Moroza abandoned the use of part H 067.027 in the design of modern modernized grain loaders (ZM-60U, ZM-90U, and ZM-120U series) — we introduced the reinforced steering wheel OVI 01.022.006, borrowed from the design of heavy grain cleaners OVS-25, and now this part is characterized by significantly higher strength and better ergonomics.

The main kinematic advantage of the new steering wheel lies in its modified hub, which works in tandem with our modernized sprocket shaft ZP 01.330. Here, instead of a smooth hole for a weak pin, the mounting seat of the OVI steering wheel features a full-fledged keyway for a standard 8x7x50 key. Thanks to this key connection, which takes on the entire torque, the new steering assembly is completely free of parasitic backlashes, does not fear sharp jerks during maneuvering, and is capable of withstanding extreme torsional loads without ovalizing the central hole into an ellipse.

Related Steering Assembly Parts

For a full repair of the classic grain loader's steering system, aside from the H 067.027 steering wheel itself, an overhaul of adjacent contact parts is typically required. The main list of related spare parts includes:

• Sprocket shaft ZP 01.330
• Cotter pins
• Clamping bolts with nuts

Given the multi-year operating history of classic ZM-60 machines, any variations in how this assembly is executed can be found on real threshing floors. Because the original factory pin frequently failed to withstand extreme torsional jerks and worked under shear, machine operators massively modified the steering columns using improvised tools. In practice, the holes in the hub and shaft were often re-drilled for thicker bolts, additional reinforcing bushings were welded on, or attempts were even made to rigidly weld the cast iron steering wheel to the steel sprocket shaft. This is precisely why, when ordering a new steering wheel, it is essential to consider the actual condition of the mounting seat on your unit, as a standard smooth hub bore may no longer fit a worn or altered axle.

Understanding the specifics of restoring old equipment, Zavod Moroza is capable of performing any individual turning and milling modifications on the H 067.027 steering wheel to suit your farm's needs. If the shank of your sprocket shaft is already modified, we can bore out the central hole of the steering wheel to a non-standard diameter or re-drill the transverse channels to an enlarged repair size for the clamping bolt. Moreover, for a radical reinforcement of the old assembly, we offer to mill a full-fledged keyway in the hub of the classic cast iron steering wheel — this will allow you to achieve a rigid connection and permanently eliminate steering backlashes without altering the external appearance of the wheel.

Buy Steering Wheel H 067.027 for ZM-60 Steering System

You can purchase the classic cast iron H 067.027 steering wheel for ZM-60 and ZM-60A grain loaders directly from Zavod Moroza. We manufacture these parts in compliance with technological standards for gray cast iron casting (SCH 20), ensuring the necessary rigidity and mass of the steering wheel to overcome undercarriage resistance during maneuvering on the threshing floor.

By ordering this part directly from the manufacturer, you gain the opportunity for its individual adaptation. Contact our sales department for component selection — we know the design of these assemblies with all their peculiarities and understand that on machinery with many years of service, the factory mounting seat has often already been altered by operators. Depending on the condition of your steering column, we can ship both a standard steering wheel with a smooth hub for the factory axle-pin and perform the necessary turning and milling work — re-drilling the hole for a repair clamping bolt or milling a full-fledged keyway to eliminate backlashes.

Furthermore, if your steering system (steering wheel and sprocket shaft) has critical wear, our specialists will help you select parts for a complete transition to the modern standard. We can outfit your order with a new modernized sprocket shaft and the reinforced OVI 01.022.006 steering wheel, allowing you to reliably assemble the unit on a rigid key connection and restore maximally predictable handling to the unit.