Screw ZP 01.070 (without daisy wheel) + Nut ZP 01.101

Screw ZP 01.070 (without daisy wheel) with Nut ZP 01.101 for ZM-60U/90U/120U

The repair kit, consisting of the basic power screw ZP 01.070 (in a version without a ratchet wheel — daisy wheel) and the special support nut ZP 01.101, forms a reliable screw pair for the front travel height adjustment mechanism. This tandem of parts is designed for our modernized ZM series (ZM-60U, ZM-90U, ZM-120U) and ZMB series (ZMB-90U, ZMB-120U) grain loaders, but it is also perfectly compatible with classic units. It acts as the main power assembly that bears the weight of the front frame of the unit. Interacting through trapezoidal threads, the screw and nut convert torque from the manual drive into vertical linear movement of the strut, allowing the operator to adjust the working clearance of the feeders above the surface or put the grain loader into transport position.

Supplying the screw pair in this configuration is a rational engineering solution in cases where the old ratchet wheel is still fully functional (or you have spares), but the threaded part of the mechanism is already worn out. Replacing the parts as a pair ensures proper initial thread engagement, eliminates play, and prevents jamming when lifting a heavy frame. The "bare" screw is supplied with a prepared upper shank, which allows you to neatly transfer and weld on your existing daisy wheel, maintaining the mechanism's functionality without unnecessary expenditure on drive structural components.

Technical Specifications of the Screw (without daisy wheel) and Nut Kit

• Kit contents: Power screw ZP 01.070 (without daisy wheel), special support nut ZP 01.101
• Compatibility: ZM-60U, ZM-90U, ZM-120U, ZMB-90U, ZMB-120U + classic ZM
• Working thread type: Trapezoidal (self-locking)
• Shaft material: High-strength structural steel
• Nut material: Anti-friction grey cast iron (base) or steel (optional)
• Screw execution: Prepared for independent daisy wheel mounting

The reliability and durability of the lifting mechanism are determined by the quality of the threaded connection. This kit uses a deep trapezoidal thread, which is capable of effectively withstanding significant axial loads from the mass of the massive unit. In addition to high load-bearing capacity, this profile provides reliable self-locking — the grain loader frame is stably held at the set height without the need for unnecessary movements or additional locking elements, eliminating the risk of sudden feeder lowering during intensive work.

The factory standard provides for the use of a steel screw paired with a cast iron nut — this combination creates an effective friction pair where the graphite inclusions in the cast iron structure act as a natural dry lubricant. This allows the screw mechanism to operate smoothly even with minimal lubrication, which is a critical advantage in high-dust conditions. An excess of heavy greases (such as Litol or grease) on an exposed thread quickly absorbs sand and dust, turning into an abrasive paste that destroys metal, so a cast iron base is the most practical. However, for farms where equipment travels over broken ground and is subjected to harsh vibrations or impacts, we offer the manufacture of a reinforced steel nut. In such a case, to prevent seizing of the "steel-on-steel" pair, the inner surface of the nut can be equipped with special grooves — they accumulate grease and hold it directly in the thread contact zone, isolating it from external dust.

A feature of this repair kit is the empty upper screw shank, which is supplied without a welded "daisy wheel." Such a format leaves the machine operator complete freedom of action — you can cut off and transfer your old or unique ratchet wheel to the new shaft (if its teeth do not have critical wear or if you have a suitable supply), or mount a specific "steering wheel" or non-standard lever during custom machine modernization (such cases also occur on farms). The main rule for independent welding is to ensure strict perpendicularity of the part relative to the shaft axis to prevent axial runout and misalignment during subsequent drive operation.

Related Components for Assembly

Since the basic screw ZP 01.070 is supplied as a "bare" threaded shaft without drive elements, corresponding contact hardware is needed for full restoration of the front travel adjustment mechanism. Engineering practice shows that wear in this assembly is comprehensive in nature, so installing a new power shaft requires mandatory inspection of the following adjacent parts:

• Ratchet wheel Z-9 (daisy wheel)
  The toothed ring that must be welded or mounted onto the upper shaft shank.
• Special nut ZP 01.101
  The screw's working pair. It is recommended to order it together with the shaft so that the new trapezoidal thread perfectly matches and does not abrade against the worn internal threads of an old cast iron or steel nut.
• Handle ZP 01.060
  For heavy new-generation units, an elongated straight version of the lever is used, which requires less muscular effort from the operator.
• Pawl ZP 01.401
  The reversible element of the ratchet for transmitting rotational torque.
• Front travel forks
  Outer guide box (ZP 01.050) and inner moving strut (ZP 01.040).
• Support elements and fasteners
  Thrust ball bearing 8104 GOST 520-2002 (absorbs lower axial load), retaining rings, locking pins, and grease nipples.

The classic factory standard provides for a rigid non-detachable connection — the ratchet wheel is mounted in the upper part of the screw shank using a spatial jig and reliably welded. However, service realities on the threshing floor sometimes dictate their own requirements, so for farms aiming to simplify maintenance, we offer the manufacture of shafts with a detachable mounting seat. Instead of a standard round base for the weld seam, the upper part of the screw can be milled with a keyway, a square profile, or a special hexagonal seat. In such a configuration, the daisy wheel is simply placed onto the shank geometry and fixed from above with a cap bolt or locking pin. This engineering solution turns the replacement of a worn ratchet or sprocket into an elementary operation — the operator only needs to unscrew one bolt with a regular wrench to remove the part. This eliminates the need for an angle grinder to cut off old seams or a welding machine directly on a dusty threshing floor. If, during operation, the unit begins to experience extreme torsional loads on uneven terrain, such a profile connection can always be welded along the joint contour, creating an ultra-durable monolithic assembly.

Buy Screw Pair ZP 01.070 (Bare) and ZP 01.101 (Nut)

Zavod Moroza is an enterprise where the production of agricultural machinery and spare parts is inextricably linked with live agricultural practice. We study in detail how assemblies wear out in real conditions under the influence of abrasive grain dust and the constant pressure of a massive frame with corresponding operational vibrations. Purchasing a basic screw pair (bare screw without a ratchet in a set with a new nut) is the most technically sound and rational step if the elements of your old manual drive (daisy wheel, handle, pawl) still retain their working life and are suitable for use. Receiving a tandem of parts from one manufacturer, you choose perfectly matched trapezoidal thread engagement, which guarantees the absence of jamming or initial play during operation. At the same time, the upper shaft shank undergoes precise geometric preparation, providing you with an ideal base for independently welding your own daisy wheel without any angular misalignment.

To prevent prolonged equipment downtime, we always keep a necessary reserve of ready-made screw pairs in stock, the dimensions of which ensure 100% compatibility with grain loaders of different generations and production years. If your unit has undergone non-standard modernizations, has a modified frame, or an increased wheelbase, our production capacities allow us to promptly machine a power shaft of individual length and adapt the special nut to specific mounting parameters.

Contact our sales department to select components — we are experts in the kinematics of lifting systems and will help you choose optimal parts taking into account the design features of your specific unit. Order verified factory parts to quickly return the mechanism to its original ease of adjustment and ensure stable holding of the machine's working height under any load.