Special Nut ZP 01.101 for Front Travel of ZM-60U/90U/120U

Special Nut ZP 01.101 for Front Travel of ZM-60U/90U/120U and ZMB

The special nut ZP 01.101 is a massive support element with an internal trapezoidal thread, which acts as the main stationary power base in the height adjustment mechanism of the modern two-wheel front travel system for ZM series (ZM-60U, ZM-90U, ZM-120U) and ZMB series (ZMB-90U, ZMB-120U) grain loaders, and is also compatible with classic ZM-60/60A models. In the kinematic scheme of the strut, this part is rigidly mounted to the frame and the upper horizontal platform of the outer fork ZP 01.050, becoming a reliable pivot point for the massive lifting screw ZP 01.070.

This assembly bears the entire static and dynamic axial load from the weight of the front frame during the machine's working height adjustment. Thanks to the precisely calibrated internal thread profile, the nut forms an effective self-locking connection with the screw. This ensures smooth movement of the inner strut with the wheelbase and reliably fixes the set clearance of the front of the unit, completely eliminating the risk of spontaneous sagging due to operational vibrations on the threshing floor. Although the part has been optimized for the increased mass of new-generation equipment, it retains the standardized mounting geometry, making it absolutely universal and suitable for the repair or modernization of classic grain loaders from previous years.

Technical Specifications of the Special Nut ZP 01.101

• Catalog Number: ZP 01.101
• Application: ZM-60U, ZM-90U, ZM-120U, ZMB-90U, ZMB-120U (compatible with ZM-60/60A)
• Working thread type: Internal trapezoidal (for screw ZP 01.070)
• Base material: Grey anti-friction cast iron SCh 20 (weight 3.3 kg)
• Reinforced material: Structural carbon Steel 45 (weight 3.5 kg)
• Mounting: 4 through-holes for tension bolts (standard M10x80)
• Quantity per unit: 1 pc.

The engineering geometry of the ZP 01.101 nut is designed to account for the complex spatial loads generated by the massive two-wheel strut of modern grain loaders. The part has a special centering collar that fits tightly and without misalignment into the corresponding platform hole — this design solution allows the four tension bolts to be relieved of transverse (radial) forces that arise during the swaying of the steel screw while the machine is operating or moving. Additionally, the nut housing features a technical groove that acts as a lubricant reservoir — the thick grease applied there gradually coats the internal trapezoidal threads, ensuring smooth operation of the screw pair.

Since modern ZM-U and ZMB series models have become heavier than their predecessors, the choice of material for the support nut is a critical factor in its durability. The base version is traditionally cast from grey cast iron SCh 20, where its undeniable advantage lies in excellent anti-friction properties — graphite inclusions in the cast iron structure act as a natural dry lubricant, which prevents galling on the steel screw even under conditions of irregular maintenance. However, cast iron is a brittle metal and remains vulnerable to harsh dynamic impacts transmitted to the strut during transport of the heavy unit over uneven ground or when crossing warehouse thresholds. For such extreme operating conditions, a reinforced modification made from monolithic Steel 45 bar stock is manufactured. The steel nut does not crack under heavy shocks but requires stricter adherence to lubrication regimes to prevent thread "seizing" due to direct steel-on-steel friction; the reinforced part features additional lubrication channels for convenient greasing.

Related Components for Support Nut ZP 01.101

The special nut ZP 01.101 works in close kinematic connection with other position adjustment mechanism elements. During its replacement or strut inspection, according to the modern two-wheel unit's scheme, the following contact parts must be checked:

• Outer fork ZP 01.050 (load-bearing structural component)
• Screw ZP 01.070 (power shaft forming the working screw pair)
• Sprocket ZP 01.402 (located in the upper part of the front travel)
• Thrust bearing 8104 GOST 520-2002 (absorbs axial loads)
• Fastening elements (M10x40 bolts for rigid fixation of the part to the platform)

Over decades of grain loader production by various plants, and after numerous repairs directly on farms, the support base design has received various configurations. In the classic factory layout, the special nut is mounted on the upper platform; however, in practice, alternative engineering solutions are encountered, such as a massive cast bearing housing with an internal trapezoidal thread cut for the guide screw. Variability also applies to the outer fork platform itself — it can be made as a standard open platform or in reinforced versions where the entire connection assembly is integrated with a welded protective casing. Such a casing isolates the mechanism from external influence but requires attention when selecting the dimensions of a new part or tools for tightening fasteners. Given such a wide spectrum of factory and "garage" engineering variations, before replacing the nut, it is worth carefully checking the configuration of the mounting seat, as the mounting holes for M10x40 bolts on your frame may have non-standard coordinates and may require individual adaptation for proper centering of the screw pair.

Buy Special Nut ZP 01.101 from Zavod Moroza

Zavod Moroza offers farmers a rational approach to restoring lifting mechanisms, manufacturing special nuts ZP 01.101 with a deep understanding of how this part works under load on modern threshing floors. You have the option to choose the classic version made of grey anti-friction cast iron (SCh 20), which, thanks to graphite inclusions, ensures perfectly smooth sliding of the screw's trapezoidal threads, or you can order a reinforced steel modification (Steel 45). The steel nut is an excellent choice for farms with rough ground surfaces — it is guaranteed to withstand the harshest dynamic impacts during unit transport and is equipped with additional lubrication channels for easy greasing.

We understand perfectly that every grain loader gains its own repair history over years of operation, so the mounting platforms of outer forks often differ from factory standards. That is why our production capabilities allow us not only to promptly ship serial spare parts from a constant warehouse reserve but also to flexibly adapt the part to your realities. If necessary, our engineers will change the diameter of the lower centering collar, precisely adjust the coordinates of the four mounting holes to fit your frame, or machine a completely unique support assembly, saving you from the need to cut or reweld the machine's load-bearing structure.

Contact our sales department to select components — we are experts in the design nuances of grain loader lifting systems from various generations and manufacturers, and we will help you select a part that will flawlessly fit into its place. Order a reliable support base directly from the manufacturer to return the original ease of adjustment to your manual drive and guarantee stable maintenance of your grain loader's working height without any sagging.