Special Bolt ZP 01.602 of Front Travel ZM-60/60A

Special Bolt ZP 01.602 of the Grain Loader Front Travel

The special bolt ZP 01.602 is a structural element of the classic front travel suspension of the ZM-60/60A grain loaders. In the kinematic scheme of the contour-following mechanism, its main technical task is to reliably fix the working direction of the spring ZP 01.603. Working in a single assembly with the movable wheel axle ZP 01.601 and metal support plates ZP 01.403, this special fastener ensures the correct operation of the shock-absorbing block. By keeping the elastic elements in the required working position, the bolt guarantees that the suspension will stably and predictably absorb dynamic loads from the unevenness of the threshing floor area, protecting the unit's load-bearing frame and its assemblies.

Design Features of the Special Front Travel Bolt

• Catalogue number: ZP 01.602
• Part type: Special bolt
• Material: High-quality structural steel (St. 3ps)
• Working surface diameter: 20 mm
• Thread parameters: M12
• Quantity per unit: 2 pcs. (symmetrically on the left and right side)

The special bolt ZP 01.602 has a specific geometry that differs from standard hardware. Visually, the part is a massive metal rod that is clearly divided into a long, smooth working surface with a diameter of 20 mm and a short threaded part. A special technological groove for the spring is also provided on the body of the bolt.

The design of the part is calculated for harsh operating conditions and constant dynamic loads. The smooth working part is responsible for fixing the working direction of the spring, holding it in the correct position during compression and expansion, while the threaded part (with an M12 metric thread) serves for rigid and reliable fastening of the bolt to the unit's axle using a standard nut of the corresponding strength class.

Since the front travel of the grain loader operates in an open environment where abrasive grain dust and moisture are always present, steel with high strength and wear resistance indicators is used to manufacture the bolt. This guarantees a long service life of the part without deformations, bending, or critical abrasion of the working surface even under intensive operation of the machine.

Practical Operating Experience Associated with the Bolt ZP 01.602

In practice, it is precisely the special bolt ZP 01.602 that often becomes the cause of the biggest headache for machine operators during the maintenance of the undercarriage. Working in an open assembly, the M12 threaded connection is constantly exposed to moisture and aggressive grain dust, and over time the nut rusts (seizes) dead to the bolt. In addition, due to constant dynamic loads and the action of the abrasive, the smooth working surface of the part gradually wears out and loses its geometry. When the time comes to replace sagging springs, disassembling this rusted assembly with standard wrenches becomes almost problematic; mechanics have to disassemble the entire front travel, cut the bolts off with a grinder, or burn them out with a gas torch.

Having encountered such a problem once, many farms usually make a radical decision during the next repair - they simply refuse to restore this contour-following mechanism - they cut off the problematic bolts ZP 01.602, throw away the springs, and leave the axle to rigidly rest on the yoke. This saves time but deprives the massive frame of the unit of any shock absorption.

Understanding these operational difficulties, our engineers propose to completely move away from outdated threaded fasteners and finicky spring blocks - our new development - the two-wheel front travel - operates on the basis of a fail-safe pendulum system (balancer). In this modern design, the special bolts ZP 01.602 are no longer needed at all. The new mechanism perfectly works out the unevenness of the threshing floor, evenly distributes the weight over two wheels, and has no open fastening assemblies that could rust or jam. Thus, if you are tired of fighting rusty bolts and disassembling undercarriage parts every season, you have a great opportunity to solve this problem forever by replacing the old assembly with a modern and durable balancer system as part of our 2-wheel front travel.

Buy the Special Bolt ZP 01.602 for ZM-60 at the Zavod Moroza

Despite the obvious advantages of modern springless systems, the classic suspension design still remains the base one for many farms. If you have decided to preserve and restore the original contour-following mechanism, the Zavod Moroza offers reliable special bolts ZP 01.602 manufactured from high-quality steel with strict adherence to the geometry of the smooth working surface and the M12 thread parameters.

Timely replacement of worn or rusted fasteners guarantees the correct fixation of the springs and returns the undercarriage to its original efficiency. Since the parts of this open assembly wear out evenly, during a major overhaul we strongly recommend carrying out a comprehensive replacement - along with the bolts, it is worth updating the springs ZP 01.603 themselves, the metal support plates ZP 01.403, and, if necessary, the axle ZP 01.601. Such an approach guarantees the correct geometry of the suspension and will save mechanics from the need to repeatedly disassemble the assembly, which is especially important in the middle of the hot season.

Contact our technical specialists! We will help you promptly complete your order with all the necessary parts for a reliable classic repair, or provide comprehensive consultation on switching to the reinforced two-wheel front travel.