ZM 01.435 Washer

ZM 01.435 Washer for Reverse Gear Mechanism

The ZM 01.435 washer is a support element of the ZP 01.220 reverse gear control assembly used on both classic ZM-60 grain throwers and modernized new-generation machines such as the ZM-60U and ZM-90U. In the overall kinematic drive scheme of the running wheels, this part works in direct conjunction with the jaw clutch disconnection mechanism.

The primary engineering purpose of the washer is to provide a rigid base for supporting and securing the ZP 01.626 power spring. During operation on the threshing floor, when the operator needs to disengage the wheel drive for safe unit towing or, conversely, engage working travel, the clutch spring undergoes constant cycles of compression and extension. The ZM 01.435 washer effectively absorbs this axial load, fixing the spring in place, providing a flat surface for its operation, and preventing accidental shifting or tilting along the working shaft.

Technical Specifications of the ZM 01.435 Washer

• Catalog number: ZM 01.435
• Application: ZM-60, ZM-60A, ZM-60U, ZM-90U
• Installation assembly: Rear drive ZP 01.220 (jaw clutch mechanism)
• Part type: Special stamped support washer
• Quantity: 2 or 4 pcs. (depending on modification)
• Material: Sheet steel (St3)
• Weight: 0.067 kg

Unlike standard flat hardware, the ZM 01.435 washer is a specialized stamped component featuring a complex volumetric shape. Its profile incorporates a distinct stamping that forms a specialized "seat" (cup) for secure support of the ZP 01.626 power spring. This geometry ensures that the terminal coil of the spring remains precisely centered and does not slip during constant compression cycles. Another critical feature is the inner hole of the washer: it is not perfectly round, but instead features an internal protrusion (tooth or "lock"). This element rigidly fixes the washer onto the shaft groove, preventing parasitic rotation around the axis when engaging or disengaging the wheel drive.

The quantity of such washers required per unit varies and depends directly on the generation of your grain thrower:

• On classic models (older ZM-60 and ZM-60A), the reverse gear mechanism is asymmetric. Because the self-propelled gearbox utilizes a differential, the disconnection jaw clutch with its spring assembly is mounted on only one half-axle. Consequently, according to the catalog, exactly 2 ZM 01.435 washers are used for proper maintenance of this assembly.
• On modernized new-generation machines (ZM-60U and ZM-90U), the kinematics were improved. To ensure reliable and safe towing without the risk of damaging the gearbox, the half-axles were made symmetric—meaning jaw clutch mechanisms with springs are now installed on both wheels (left and right). Due to the complete duplication of these assemblies, a modern unit requires a total of 4 ZM 01.435 washers.

Associated Parts of the ZM 01.435 Washer

Within the kinematics of the wheel drive disconnection assembly (jaw clutch), the ZM 01.435 washer operates in close mechanical interaction with several other elements. During troubleshooting or repair of this mechanism, the condition of the following adjacent parts must be inspected alongside the washer:

• Clutch spring ZP 01.626 (the primary power spring resting directly in the washer cup)
• Half-clutch ZM 01.102 (the moving control component with jaws)
• Latch ZP 01.631, button ZP 01.629, and small spring ZP 01.628 (components of the manual clutch locking mechanism)
• Bushing ZP 01.632 (guide for the latch button)
• Reverse gear shaft (the main half-axle of the unit where the washer is secured via a groove)

The half-clutch locking mechanism is frequently subject to modifications performed directly on farms. Due to the loss of small original components (cotter pins, latches, or buttons) in field conditions, operators often resort to makeshift repairs—welding custom stoppers, boring out shafts to alternative diameters, cutting new keyways, or installing non-standard springs (stiffer, wider, or longer) found on hand. As a result of such interventions, a standard factory washer may fail to fit properly, or its internal locking tooth may fail to align with altered shaft geometries.

The specialists at Zavod Moroza are fully aware of these operational nuances and the consequences of field modifications. Thanks to our flexible manufacturing capabilities, we are not limited to selling standard spare parts alone. If the wheel disconnection assembly on your grain thrower has been altered, we can easily adapt the washer geometry to fit your specific custom setup.

If necessary, we can manufacture a part with a deeper or wider stamping (cup) to securely support a non-standard spring, expand the central bore, or alter the shape and position of the internal locking tab to match a unique shaft groove. We are ready to accommodate any structural changes on your machine and produce the exact part needed for a flawless fit and trouble-free operation of the reverse gear mechanism!

Buying the ZM 01.435 Washer for Grain Throwers

Repair and maintenance practice shows that wear on wheel disconnection mechanism components is often comprehensive. If prolonged heavy use or previous makeshift modifications have damaged the mounting seats, we recommend considering the purchase of a complete ZP 01.220 rear-drive assembly or ordering individual pre-assembled half-axles—allowing for the rapid restoration of factory kinematics without wasting labor on fitting and restoring individual worn elements.

However, if the geometry of the main shaft remains undamaged, targeted replacement of the stamped ZM 01.435 support washer paired with a new ZP 01.626 power spring is the most technically and economically rational step. Purchasing this component directly from Zavod Moroza guarantees precise centering of the spring assembly and secure fixation on the shaft groove without parasitic play or slippage.

Contact our sales department for technical consultation and order processing. We will analyze your machine's mechanical configuration and accurately select the required quantity of washers and associated components. Choose precise engineering parts from the manufacturer to ensure restored drive control and reliable performance from your equipment's running gear.