ZM-120U Rear Travel Assembly (Travel Differential Complete with Wheels)

ZM-120U Rear Travel Assembly (Travel Differential Complete with Wheels)

The travel differential complete with wheels (ZM-120U rear travel assembly complete with pneumatic wheels) is a fully assembled, factory-centered, and adjusted ready-to-use rear running axle designed to provide self-propelled movement, easy maneuverability, and a "smooth ride" for ZM-120U and ZMB-120U grain throwers, as well as compatible ZM-60U and ZM-90U modifications. This unit implements a gearless kinematic scheme-it mounts onto the rear section of the machine frame and operates via an independent drive gearmotor through a chain drive.

Unlike the base version without wheels, this supply package includes a complete traction and running gear set, specifically two assembled R13 automotive pneumatic wheels (featuring stamped Tavria rims, 155/70 R13 tires, internal inner tubes, and bolted mounting flanges). Delivering the axle in maximum factory configuration represents the most rational turnkey solution-enabling rapid replacement of the entire rear travel system or complete modernization of legacy machinery without requiring superfluous welding, turning, or adjustment work in the workshop.

Technical Specifications and Composition of the Complete ZM-120 Rear Travel Assembly

• Assembly catalog number - ZM120 06.100.000-05 (complete with pneumatic wheels)
• Application - ZM-120U, ZM-60U, ZM-90U self-propelled grain throwers and ZMB-120U / ZMB-90U hopper loaders featuring gearmotors, as well as complete running gear retrofit kits
• Running base type - two-wheeled mobile running axle on R13 automotive pneumatic wheels
• Drive mechanism - independent gearmotor gearless drive via a ZM120 01.460.05-05 chain sprocket
• Composition of the complete running axle:
  
  1. Central differential oil drum (ZM120 06.100.001) - a sealed steel housing featuring cast-iron covers, an M16 threaded drain plug (OVB 6023), and filled with transmission oil
  2. Planetary bevel gear group - ZP 07.609 steel cross, hardened ZP 07.608 pins, ZM 07.605 planet gears (z=17, module m=3.5) with ZM 07.105 (25x32x45) and ZM 07.105-01 (25x32x20) cermet bushings
  3. Driven half-axle gears - two ZM 07.603-05 bevel gears (z=28, m=3.5) with a set of shims to eliminate axial play
  4. Power shaft line - left long half-axle (ZM120 06.120.001-05), short right half-axle (ZM120 06.110.001-05), connecting flange (ZM120 06.140.000), VAZ elastic damper coupling (2101-2202120), and right shaft (ZM120 06.130.001)
  5. Bearing supports - 4 ball bearings 180206 (housed in side drum covers), 2 external cast-iron housings with covers (H 026.058 + H 026.163) featuring 11206 spherical double-row bearings, and a UCP206 pillow block housing bearing
  6. Complete wheel group (kit) - R13 stamped steel rims (Tavria 3x98 mm bolt pattern), 155/70 R13 pneumatic tires, R13 automotive inner tubes (UK-13), rim clamping mounting flanges, ZM120 06.150.000 hubs (flanges), and ZM120 06.100.009 retaining lock plates.
  
  
• Country of manufacture - Ukraine

Kinematic and Operational Advantages of the Upgraded ZM-120 Rear Travel System

Combining an axle differential mechanism with a pneumatic wheel base guarantees comprehensive reliability, superior comfort, and convenience when operating agricultural machinery:

1. "Smooth Ride" and Vibration Damping
   R13 pneumatic tires absorb dynamic shocks significantly better than legacy solid rubber bands. They easily negotiate technological thresholds and threshing floor irregularities, reduce rolling resistance during maneuvering, and pass more gently over spilled grain piles, minimizing grain damage.
2. Smooth Stepless Control from the Gearmotor
   By eliminating legacy multi-speed gearboxes with two rigid gears, the ZM-120 rear travel system driven by a gearmotor ensures smooth starts without jerking. Simultaneously, the bevel differential positioned on the axle automatically matches wheel angular speeds during turns, eliminating the need to manually toggle cam half-clutches.
3. Two-Stage Shock Load Damping
   The rubber-metal elastic VAZ coupling (2101-2202120) dampens torsional vibrations from the chain drive, while external spherical 11206 bearings housed in H 026.058 supports self-align during micro-deflections of the frame while traveling over uneven ground.
4. Protected Sealed Assembly
   The planetary mechanism operates within an oil bath of transmission fluid inside the central drum. Dual 30x52 mm shaft oil seals and ZM120 06.100.007 clamping covers isolate the cermet bushings and bevel gears from the abrasive impact of grain dust.

Modernization Features and Compatibility with Various Generations of Machinery

Purchasing the ZM-120 rear travel assembly fully assembled with wheels completely eliminates component incompatibility risks during repairs or retrofitting. However, when selecting, it is important to consider that grain throwers from previous production years utilized distinct design layouts, such as Ø 500 mm rubberized wheels with cam disengagement half-clutches, or an output line featuring two elastic couplings. In this modern axle, the differential is positioned directly on the axle, and the wheels lack half-clutches since they operate in tandem with a gearmotor.

If you are restoring an aggregate using individual replacement parts, these structural differences must be taken into account. Nonetheless, ordering a complete running axle with pneumatic wheels allows even a legacy ZM-60 to be converted to a modern "smooth ride" base-the new axle mounts onto standard frame mounting locations without requiring additional modifications.

Associated Assemblies and Spare Parts for Maintaining the ZM-120U Rear Travel System

At Zavod Moroza, you can order both the complete ZM-120 rear travel system with wheels and individual components for routine maintenance:

• Complete R13 pneumatic wheel with flange (rim + tire + inner tube + mounting flange)
• Travel differential without wheels (ZM120 06.100.000-05)
• Central differential drum (ZM120 06.100.001)
• Complete cross spider assembly (ZP 07.110.000) or bare cross spider (ZP 07.609)
• Sprocket with cover (ZM120 01.460.05-05) and side cast-iron covers
• Complete right shaft assembly (ZM120 06.130.000) with elastic coupling
• Shim sets and bearing assemblies (180206, 11206, UCP206)

Beyond standard factory execution, Zavod Moroza offers special modifications of the rear travel system tailored to elevated loads or non-standard tasks of your enterprise. Specifically, we manufacture reinforced shafts and half-axles from high-strength alloy steel grades featuring supplementary heat treatment to operate under extreme torsional loads. Furthermore, differential customization with a reinforced chain drive featuring increased pitch and high-strength sprockets and drive chains is available, substantially boosting assembly service life during intensive operations. If your enterprise utilizes an alternative proprietary wheel base, we provide adaptation for alternative bolt patterns by manufacturing mounting flanges tailored to custom rims or alternative wheel dimensions.

Transitioning from a legacy self-propelled gearbox to a modern scheme featuring a gearmotor and axle differential raises numerous questions for machine operators-ranging from gear ratio and motor power selection to frame integration and chain drive selection. Specialists at Zavod Moroza possess extensive practical experience in retrofitting grain throwers across various production years. We can select and supply a fully compatible running axle and gearmotor or provide detailed consultation regarding installation and assembly adjustment. Contact us with any inquiries-we will help you modernize your equipment competently without wasting time and resources.

Buying the ZM-120U Rear Travel System with Axle Differential and Wheels from Zavod Moroza

Regardless of whether you are executing a major replacement of a damaged axle or comprehensively upgrading your grain thrower's running system with a gearless drive transition, ordering the rear travel assembly complete with pneumatic wheels directly from Zavod Moroza ensures you receive a factory unit completely ready for operation, featuring strict geometric precision and total component compatibility.

Have doubts concerning axle compatibility with your grain thrower frame or wish to clarify configuration details? Leave a request on our website or call our engineers. We possess deep expertise in the structural nuances of machinery across different production years and will assist in selecting the optimal solution with prompt order dispatch directly from the manufacturer's warehouse!