ZP 01.220 Reverse Gear Assembly (Classic Asymmetric, Without Wheels)

ZP 01.220 Reverse Gear Assembly (Classic Asymmetric, Without Wheels)

The ZP 01.220 reverse gear assembly without wheels is a fully integrated mechanical running gear unit designed for installation on classic serial ZM-60 grain throwers. The assembly mounts to the lower elements of the machine's frame using four cast-iron H 026.058 bearing housings and is responsible for receiving torque from the self-propelled gearbox and transmitting it to the driving hubs.

The primary feature of this configuration is the exclusion of the ZPT 1.6.2 running wheels and M12 wheel mounting bolts from the package—the assembly ships retaining both hubs (the cam-type ZM 01.180 and the blind ZM 01.104), which feature standardized 4-hole flange bolt patterns. This option is an economically sound solution for farming operations where existing steel disks and tires retain their service life, or when installing upgraded 500 mm wheels or pneumatic tires is planned. Supplying pre-assembled half-axles with bearings, sprockets, and clutches enables a complete reverse gear overhaul without expenses for unnecessary tire rubber.

Technical Specifications of the ZP 01.220 Reverse Gear (Classic Asymmetric, Without Wheels)

• Assembly designation: ZP 01.220 reverse gear (configuration without wheels)
• Application: ZM-60 (classic serial machines with asymmetric drive)
• Drive layout: Asymmetric (left half-axle features a drive disengagement mechanism; right half-axle is blind)
• Shaft bore diameter: 30 mm
• Shaft material: Structural carbon steel (Steel 35)
• Support assemblies: 4 cast-iron housings H 026.058 (Sch 20) with mounting feet for bolted frame attachment
• Bearing kit: Spherical double-row bearings 11206 (1207K + H207 tapered adapter sleeve set) — 4 pcs.
• Bearing chamber seals: Through cast-iron covers H 026.163 with fitted reinforced lip seals (30x52 mm oil seals) — 4 pcs.
• Drive sprockets: Z=25, pitch t=19.05 mm (for PRL-19.05 roller chain): left sprocket ZP 01.340 features a 30 mm smooth bore secured with a ZP 01.646 safety shear pin; right sprocket ZP 01.360 mounts on an 8x7 mm prismatic key with an M10 set screw.
• Hubs with blank flanges: Left hub is a cam-type ZM 01.180 hub with two internal cermet bushings NEN 400003 for free rotation on the shaft; right hub is a blind ZM 01.104 hub with a flat face secured by the ZP 14.502 locking plate.
• Drive disengagement mechanism: Cam half-clutch ZP 01.102, heavy-duty spring ZP 01.626, support washer ZM 01.435, and complete latch assembly ZP 01.631.
• Wheel set inclusion: Excluded (this assembly ships without ZPT 1.6.2 wheels and without M12 wheel bolts).

The asymmetric kinematic layout relies on two specialized 30 mm diameter half-axles. The left ZP 01.625 shaft features milled slots for sliding the ZP 01.102 cam half-clutch, a detent pocket for the ZP 01.631 latch pin, and radial holes for the ZM 01.435 washer cotter pins and the ZP 01.340 sprocket shear pin. The right ZP 01.627 half-axle contains two extended keyways and a milled longitudinal pad for the ZP 14.502 locking plate. This classic layout ensures a permanent rigid drive for the right wheel alongside the capability to manually disengage the left wheel during transport.

The support group built on four H 026.058 housings absorbs the static weight of the grain thrower's rear section and dynamic loads encountered while traveling across the threshing floor. The double-row 11206 bearings self-align within the housings via spherical raceways, compensating for minor shaft deflections or deviations in the frame's mounting surfaces. To protect against abrasive grain dust, each housing is bored and machined to accommodate a 30x52 mm reinforced lip seal and is closed off with an H 026.163 through cast-iron cover.

The calibrated disengagement assembly ships with precise clearances verified between the cams of the ZP 01.102 half-clutch and the ZM 01.180 hub. The ZP 01.626 heavy-duty spring generates calculated tension to maintain clutch engagement under load, while the small ZP 01.628 latch spring holds it in the idle position during towing. The ZP 01.646 shear pin on the left sprocket serves as a controlled safety link that shears during wheel jams, protecting the self-propelled mechanism from damage.

Full Contents of the ZP 01.220 Reverse Gear Kit (Without Wheels)

Left Half-Axle Assembly (With Drive Disengagement Mechanism):

• Reverse shaft ZP 01.625 (30 mm bore, with holes, keyways, and latch detent pocket).
• Drive sprocket ZP 01.340 (Z=25, 19.05 mm pitch, configured for shear pin).
• Safety shear pin ZP 01.646 and thrust retaining rings 6511 019.
• Cam half-clutch ZP 01.102.
• Heavy-duty spring ZP 01.626 and support washer ZM 01.435.
• Latch assembly ZP 01.631 complete (guide bushing ZP 01.632, small spring ZP 01.628, release button ZP 01.629).
• Cam-type wheel hub ZM 01.180 (featuring a 4-hole square flange).
• Pressed-in cermet bushings NEN 400003 (2 pcs.).
• Spacer ring kit 30 ZM 01.623 (complete with VM10 set screw and 50P spring ring).

Right Half-Axle Assembly (Rigid Drive):

• Reverse shaft ZP 01.627 (featuring locking plate pad and keyways).
• Drive sprocket ZP 01.360 (Z=25, 19.05 mm pitch, for 8x7 mm key and M10 set screw).
• Blind wheel hub ZM 01.104 (with flat face and 4-hole square flange).
• Locking plate ZP 14.502 with two M8x16 mounting bolts and spring washers.

Support and Bearing Group (For Both Half-Axles):

• Cast-iron bearing housings H 026.058 on mounting feet — 4 pcs.
• Spherical double-row bearings 11206 with H207 tapered adapter sleeves — 4 pcs.
• Through cast-iron bearing covers H 026.163 — 4 pcs.
• Reinforced rubber lip seals (30x52 mm oil seals) — 8 pcs.
• Grease zerks for supplying lubricant to bearing chambers.

The asymmetric reverse gear configuration was engineered for serial Soviet-designed ZM-60 grain throwers manufactured by various plants over many years. Throughout their operational lifespan, these machines underwent periodic factory modifications, and within agricultural repair shops, the unit frequently underwent improvised retrofits. Consequently, grain throwers operating today feature variations in shaft geometry, fixation methods, and hub bolt hole spacing.

The classic asymmetric layout provided drive disengagement solely on the left side, designed for single-speed gearboxes with internal differentials. However, even in this setup, during machine towing, the right wheel continues to spin via the blind ZM 01.104 hub, idling the differential satellite and bevel gears inside the gearbox, which creates extra resistance and causes gear wear. To fully unload the self-propelled mechanism, farms frequently perform a modernization—discarding the blind ZM 01.627 shaft and ZM 01.104 hub to convert the reverse gear to a symmetric layout featuring two ZP 01.625 cam half-axles and dual ZP 01.102 clutches.

Additionally, the shafts in parts from different production years exhibit minor differences—the catalog keyway for the clutch was originally manufactured short, whereas later it began to be milled longer to facilitate smoother travel. Fixation elements also vary (ranging from the classic ZM 01.629 button to custom levers or modern rings) alongside cast-iron hub profiles.

The specialists at Zavod Moroza possess deep practical expertise in manufacturing and servicing running gear for grain throwers of all generations and modifications. We are thoroughly familiar with all structural nuances of these assemblies, including the consequences of previous repairs or field conversions. Our in-house foundry and machining facilities allow us to produce strictly standardized components based on original blueprints to preserve the classic asymmetric drive as well as flexibly adapt parts or supply fully pre-assembled turnkey units tailored to your machinery's unique specifications.

Buying the ZP 01.220 Reverse Gear Assembly (Without Wheels) from Zavod Moroza

Zavod Moroza's multi-year experience is founded on an ongoing, practical dialogue with engineers and machine operators at agricultural enterprises. Observing grain thrower operations under diverse conditions, we have navigated every evolutionary stage of this equipment—from classic ZM-60s to modern ZM-60U, ZM-90U, and ZM-120U series—enabling us to develop our own modernized reverse gear options featuring a symmetric drive and reinforced wheel base.

Purchasing the ZP 01.220 reverse gear assembly without wheels is a rational way to restore the mechanical components of your ZM-60's rear axle without overpaying for new wheel rims and tires. You receive a factory-calibrated unit complete with ready half-axles, installed 11206 bearings, oil seals, an adjusted clutch, and grease zerks for convenient lubrication. Upon request, we can perform initial factory lubrication of the bearing chambers before dispatch. For commissioning, you simply need to bolt the bearing housings to the frame, secure existing wheels to the hub flanges, and tension the drive chains.

Supplying the assembled unit eliminates the need for complex workshop fitting work, pressing bearings onto tapered sleeves, or adjusting component clearances in the shop. Contact our sales department for consultation—we will help select the exact configuration matching your grain thrower's parameters and organize prompt delivery to restore full operational capability to your machinery in the shortest possible time.