Bare Front Travel Screw ZM-60 (ZP 01.070)

Bare Front Travel Screw ZM-60 (ZP 01.070)

The front travel screw ZP 01.070 (in the basic "bare" configuration, without the star wheel) is the central power rod of the front travel position adjustment mechanism (ZP 01.020) of the ZM-60 series grain loaders and their numerous modifications. This part acts as the main supporting link of the lifting assembly and is directly responsible for taking on the mass of the entire front section of the unit during the vertical movement of the inner yoke (ZP 01.040) with the support wheel. Interacting with a special nut (ZP 01.101) or a special bearing housing in some modifications, this threaded shaft serves as the foundation for mounting the ratchet drive, which converts the effort from the handle into a smooth vertical movement of the frame. The presence of a functional screw allows the operator to adjust the height of the front section of the unit as accurately as possible, ensuring perfect alignment of the scraper feeders with the surface of the threshing floor.

Design features of the screw ZP 01.070 without a star wheel

The front travel screw ZP 01.070 in its basic configuration is a massive steel shaft designed for high and constant axial loads. The main working zone of the part is the rod with a cut trapezoidal thread - it is precisely this thread profile that provides the high load capacity of the assembly and creates a self-braking effect, which prevents spontaneous unwinding of the mechanism under the weight of the unit. To manufacture this part at the Zavod Moroza, high-quality round rolled stock made of high-strength steel is used. The main distinguishing feature of this item is the absence of a welded ratchet wheel (star wheel), where the upper part of the shaft is left smooth and fully prepared for independent installation of the ratchet. Such a solution allows saving on repairs if your old ratchet wheel still has intact working teeth and is suitable for reuse, or if you plan to install a non-standard drive.

From the perspective of the mechanics of the ZM-60 lifting assembly, this threaded rod performs the function of a power intermediary between the operator and the support wheel. In the classic structural scheme, the installed shaft works in pair with a special nut (ZP 01.101) securely fastened to the upper platform of the outer yoke. After you equip the upper part of the screw with a ratchet and begin to transmit torque from the handle, the part will execute translational movement through the thread of the nut - its lower base freely passes through the hole in the flange of the inner yoke (ZP 01.040), resting on it via corresponding adapter elements - thrust washers, bearings, or bushings (depending on the version of the unit). The principle of height adjustment is based on direct pressure - moving downward, the screw pushes away the inner leg with the wheel, which forces the front frame of the grain loader to rise. Conversely, when the shaft is unscrewed upward, the pressure on the support weakens, and the massive part of the machine smoothly sags under the action of gravity.

Repair features related to the screw ZP 01.070 without a star wheel

When buying a basic lifting screw ZP 01.070 without a welded ratchet, it should be considered that its installation involves additional welding work. Choosing such a "bare" part is absolutely justified if your old ratchet wheel remains undamaged and suitable for reuse, or if you purchase it as a separate spare part. At the same time, it is important to remember that renewing only the power shaft rarely solves all the problems of a worn-out mechanism - the greatest attention is required by the contact pair, where screwing a new trapezoidal thread into an old, loosened nut will lead to accelerated wearing of the profile on the fresh metal. For a high-quality and durable restoration of the system, we offer a complete list of necessary spare parts:

• Ratchet wheel (star wheel) Z-9
• Special nut ZP 01.101
• Handle ZP 01.060
• Safety pawl ZP 01.401
• Yokes (outer ZP 01.050 and inner ZP 01.040)
• Support hardware (bushings, thrust washers, or bearings)
• Small consumables (locking cotter pins, grease nipples, fixing pins, and standard fasteners)

The flexibility of our product range allows us to satisfy any repair needs. If you have the appropriate equipment and skills for accurate centering and independent welding of the star wheel, buying separate basic elements will be an excellent way to save money. At the same time, for farms seeking to minimize equipment downtime and guaranteed avoidance of misalignments during welding, screws with a ratchet already welded in a jig, as well as fully assembled units with all necessary attachments, are always available in the catalogue of the Zavod Moroza.

Synchronous replacement of adjacent parts of the mechanism is the best way to restore the original factory kinematics to the grain loader. Such an approach significantly saves time on servicing the unit and, at the same time, reliably protects new spare parts from the destructive impact of play that remains in old joints.

Universality and compatibility of the basic screw ZP 01.070

Unlike many other elements of the grain loader, which were constantly modernized by various enterprises, the lifting power shaft has always remained a maximally universal part. Thanks to the classic dimensions and calibrated pitch of the trapezoidal thread, our basic blank seamlessly fits the overwhelming majority of ZM-60 machines of any production year. The upper part of the screw is perfectly designed for a standard 9-tooth ratchet wheel (Z-9), which guarantees the integration of the part into both old Soviet units and modern models.

However, the operation of equipment in actual farms is often accompanied by non-standard modifications. If atypical large-diameter support wheels are installed on your grain loader or the geometry of the front frame was changed during previous repairs, the standard reach of the screw may simply not be enough for the proper lowering of the feeders to the surface. For such cases, the specialists of the Zavod Moroza are ready to promptly manufacture a part with individual parameters. We can alter the overall length of the shaft (make it longer or shorter), and also use even more reinforced grades of steel for operation under extreme loads. In any case, you receive a high-quality part that will perfectly fit your specific machine configuration.

Main causes of premature wear of the screw ZP 01.070

The natural wear of the lifting screw is most often caused by the harsh operating environment, because the trapezoidal thread works under the constant pressure of the massive frame, while grain dust, mixing with the working lubricant, forms a harsh abrasive paste. With every rotation of the handwheel, this mixture grinds away the metal on the screw threads and inside the nut, and when the thread profile becomes critically thin, the mechanism may lose its self-braking capability, and the front section of the machine begins to lower spontaneously during operation. This also results in the feeders dropping below a safe level and their rubber scrapers beginning to rub against the concrete or asphalt of the threshing floor - such contact accelerates the destruction of the rubber and entails a more expensive repair of the pickup assembly.

A significant percentage of critical damage is attributed to the human factor and the application of excessive force, when, for example, the movable front travel yokes jam due to wall deformation, and operators attempt to solve the problem by force. Using a long metal pipe as an additional lever to turn the mechanism is a classic mistake on the threshing floor, which as a result, instead of the desired lifting of the frame, bends the axis of the steel shaft or completely strips the remaining threads.

During the manufacturing of screws at the Zavod Moroza, we use wear-resistant steel grades designed for intense friction. However, if your old shaft is already bent in a bow or its threads are completely stripped, attempting to restore it in garage conditions is useless. It is impossible to straighten the axis geometry with a sledgehammer, and attempts to build up metal on the old thread will never restore the correct trapezoidal pitch. Purchasing a new factory-made part remains the only reliable solution that will return smooth movement to the mechanism and ensure stable holding of the set height during the operation of the unit.

Buy basic front travel screw ZP 01.070 for ZM-60 at the Zavod Moroza

As a direct manufacturer of a wide range of agricultural machinery components, the Zavod Moroza strictly controls the production quality of every power part. The creation of the basic lifting shaft begins with the careful selection of durable rolled steel, after which a deep trapezoidal thread with perfect adherence to the specified pitch is formed on lathes. Since this item is supplied without a ratchet, its upper part undergoes precise geometric preparation, where you receive a flat surface fully ready for welding work, which will allow you to mount your own ratchet wheel (star wheel) as evenly and without misalignments as possible.

To minimize equipment downtime on the threshing floor, we always keep a sufficient quantity of basic ZP 01.070 screws in stock. Manufacturing according to authentic blueprints ensures their absolute interchangeability with the mechanisms of ZM-60 grain loaders of any production year. Along with serial production, our capabilities allow us to fulfill custom requests - if your unit has undergone modifications (has a re-welded frame or atypical support wheels), the plant's specialists will promptly machine a power shaft of non-standard length to the configuration of your specific machine. When planning a repair, definitely take into account the basic rule of mechanics - for the durable operation of the assembly, a new screw should be installed at least in pair with a new special nut (ZP 01.101).

Contact the specialists at the Zavod Moroza for technical support - we will help you figure out the repair nuances of your specific unit modification, assemble the optimal kit of spare parts, and promptly carry out the shipment. All this so that the equipment can return to full operation as quickly as possible and you can easily and quickly set the correct alignment of the feeders.