ZP 01.625 Reverse Half-Axle Assembly with Cam Clutch and Wheel

ZP 01.625 Reverse Half-Axle Assembly with Cam Clutch and Wheel

The reverse half-axle assembly complete with a disengagement mechanism and wheel is an independent running gear drive unit responsible for transmitting torque from the self-propelled gearbox to the left driving wheel of ZM-60, ZM-60A grain throwers, and their modifications. The unit mounts to the machine frame using two H 026.058 cast-iron bearing housings, combining traction delivery with the ability to quickly disengage the wheel drive during transport or maneuvering on the threshing floor.

The structural foundation of this assembly unit is a 30 mm diameter steel ZP 01.625 shaft, which mounts a complete set of drive, support, and control components: the ZP 01.340 drive sprocket with a ZP 01.646 safety shear pin, the sliding ZP 01.102 cam half-clutch with a ZP 01.631 latch, the ZM 01.180 cam hub featuring NEN 400003 cermet bushings, 11206 spherical bearings within sealed housings, and a ZPT 1.6.2 rubber-tired wheel (400 mm) secured to the hub flange.

Purchasing an individual left half-axle assembly with a wheel is a practical solution for localized running gear damage when only the drive side of the rear axle fails. Supplying the unit in a calibrated factory-built configuration eliminates the need to press in cermet bushings separately, adjust cam clearances, or mount the wheel in the workshop—the assembled block bolts directly to the frame via housing feet and connects promptly to the drive chain.

Technical Specifications of the Assembled ZP 01.625 Reverse Half-Axle

• Assembly designation: ZP 01.625 Reverse Half-Axle Assembly (Left drive half-axle with cam clutch and wheel)
• Application: ZM-60, ZM-60A (in classic asymmetric setups) or as a modernization kit for symmetric running gear upgrades (similar to our ZM-60U and ZM-90U models)
• Drive shaft: ZP 01.625 shaft (30 mm bore diameter, Steel 35 structural steel) featuring milled clutch slots, a latch detent pocket, and holes for cotter pins and a shear pin
• Support assemblies: 2 cast-iron bearing housings H 026.058 (Sch 20) with mounting feet for bolted frame attachment
• Bearings: Spherical double-row bearings 11206 (1207K + H207 tapered adapter sleeve set) — 2 pcs.
• Seals and protection: Through cast-iron covers H 026.163 with clamped reinforced lip seals (30x52 mm oil seals) — 2 pcs., alongside grease fittings for lubrication
• Drive sprocket: ZP 01.340 (Z=25, pitch t=19.05 mm for PRL-19.05 chain) featuring a 30 mm smooth bore and a ZP 01.646 safety shear pin
• Wheel hub: Cam-type cast-iron hub ZM 01.180 with two pressed-in cermet bushings NEN 400003 (30x40x20 mm) for free rotation when the drive is disengaged
• Drive disengagement mechanism: Cast-iron cam half-clutch ZP 01.102, heavy-duty spring ZP 01.626, support washer ZM 01.435, spacer ring 30 ZM 01.623, and complete latch assembly ZP 01.631
• Running wheel: 1 rubber-tired wheel ZPT 1.6.2 (400 mm diameter, 6 mm steel disk, pressed-on bandless IZ 2162 tire) complete with M12 mounting bolts securing it to the hub flange

The complete drive-and-safety chain of the half-axle builds around the steel ZP 01.625 shaft, where milled slots allow the ZP 01.102 cam half-clutch to slide smoothly longitudinally during drive uncoupling. In operational mode, the ZP 01.626 heavy-duty spring presses the clutch against the ZM 01.180 hub, transferring torque from the ZP 01.340 sprocket to the wheel. The smooth sprocket fit on the shaft combined with the ZP 01.646 shear pin establishes a calculated emergency link—if wheel rotation jams, the shear pin fails first, shielding the self-propelled gearbox gears from destructive loads.

The dual-support bearing base with seals rests upon two H 026.058 cast-iron housings. The double-row spherical 11206 bearings install into bored seats, compensating for shaft deflection and minor misalignments in the frame's geometric plane during installation. Thanks to the through H 026.163 covers fitted with 30x52 mm oil seals, lubricant is reliably retained within the housings while abrasive grain dust is blocked from reaching the raceways.

Transitioning to a Symmetric Drive Layout (Running Gear Modernization)

The classic rear drive of ZM-60 grain throwers was built on an asymmetric layout where the left half-axle featured a ZP 01.102 clutch while the right (the ZP 01.627 shaft) remained blind. The primary drawback of this setup is that during machine towing, the blind right wheel continues to spin, forcibly driving internal gears and differential satellites inside the gearbox, creating extra resistance and accelerating gear wear.

Installing two identical ZP 01.625 half-axle assemblies with clutches and wheels allows an easy conversion of the reverse gear to a modern symmetric layout (as implemented on our newer ZM-60U and ZM-90U machines). In this configuration, the operator disengages the travel mechanisms on both sides—both ZM 01.180 cam hubs enter free-rolling mode on the NEN 400003 cermet bushings, entirely uncoupling the wheel base from the drive mechanism. This approach completely removes parasitic load from the self-propelled gearbox during towing and ensures effortless maneuvering of the grain thrower across the work site.

Full Contents of the Left ZP 01.625 Half-Axle Kit (With Clutch and Wheel)

Drive Shaft and Disengagement Components:

• Reverse shaft ZP 01.625 (30 mm diameter, featuring cotter pin holes, slots, and latch detent recess)
• Cam half-clutch ZP 01.102 (featuring four cams and side lever handles)
• Heavy-duty spring ZP 01.626 and stamped 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 or ring)
• Spacer ring kit 30 ZM 01.623 (complete with VM10 set screw and 50P spring ring)

Drive Group:

• Drive sprocket ZP 01.340 (Z=25, pitch t=19.05 mm for PRL-19.05 roller chain)
• Safety shear pin ZP 01.646 and two thrust retaining rings 6511 019

Hub and Bearing Supports:

• Cam-type wheel hub ZM 01.180 with a square flange
• Pressed-in cermet bushings NEN 400003 (2 pcs., 30x40x20 mm dimensions)
• Cast-iron bearing housings H 026.058 on mounting feet — 2 pcs.
• Spherical double-row bearings 11206 with H207 tapered adapter sleeves — 2 pcs.
• Cast-iron through-type bearing covers H 026.163 — 2 pcs.
• Reinforced lip seals (30x52 mm oil seals) — 4 pcs.
• Grease zerks for supplying lubricant to housing chambers

Wheel Unit:

• Rubber-tired wheel ZPT 1.6.2 (400 mm diameter, 6 mm steel disk, pressed-on bandless IZ 2162 tire) or reinforced 500 mm wheel
• M12 mounting bolts with nuts and washers for securing the wheel to the hub flange

Depending on the grain thrower's manufacturing year and producer, the 30 mm drive shaft itself may feature notable structural nuances. Original blueprints specify a short keyway for sliding the ZP 01.102 half-clutch, but in practice, it is often milled extended to ensure smooth longitudinal clutch travel during disengagement. Additionally, some shafts may lack the spherical latch detent pocket, feature varying groove locations for 6511 019 retaining rings, or possess different radial hole diameters for the ZM 01.435 washer cotter pins.

Standardly, the ZP 01.340 sprocket mounts onto a smooth shaft surface without a keyway and secures via a "soft" ZP 01.646 shear pin acting as a transmission fuse. If a wheel jams, the shear pin fails first, protecting the self-propelled gearbox from gear breakage. However, due to bore enlargement or frequent shear failures from peak loads, farming operations often bore out sprockets to accept a key or hardened pin. Zavod Moroza manufactures both classic shear-pin sprockets and keyed versions engineered with calculated strength thresholds to eliminate play while preserving gearbox protection.

The classic ZP 01.631 latch featured a smooth small ZP 01.629 button that frequently slipped from greasy hands when trying to pull the clutch, prompting widespread field replacements with welded T-handles or wing nuts. At Zavod Moroza, we have incorporated this feedback—repair kits feature buttons with deep knurled threading, while modern grain throwers (ZM-60U, ZM-90U) replace the button with a massive metal ring that is easy to catch even while wearing thick work gloves.

The flange of the ZM 01.180 cam hub serves as a universal mounting pad: classic ZM-60 machines typically mount a 400 mm ZPT 1.6.2 rubber-tired wheel to this half-axle. Meanwhile, modernized ZM-60U and ZM-90U grain throwers accommodate reinforced 500 mm wheels (sourced from OVS-25 cleaners) on the same hub, increasing ground clearance and improving machine mobility across uneven threshing floors.

Our manufacturing facilities enable us to supply standardized serial half-axle assemblies as well as adapt any of their components to match modified machinery. If your machine previously had re-machined shafts, altered bushing dimensions, or custom disks, we can rebore the ZM 01.180 hub for the correct bearing, manufacture a shaft with the required hole positioning, or source custom fasteners.

Buying the Assembled ZP 01.625 Reverse Half-Axle

Zavod Moroza's multi-year experience is founded on ongoing, practical collaboration with engineers and machine operators at agricultural enterprises across Ukraine. Analyzing grain thrower operations on threshing floors and the causes of field repairs, we have navigated every evolutionary stage of this equipment—from classic Soviet ZM-60 models to current ZM-60U, ZM-90U, and ZM-120U series. Practice demonstrates that the most effective engineering solution for fully protecting the self-propelled gearbox during towing is transitioning to a symmetric running gear featuring dual cam clutches and reinforced, larger-diameter wheels.

At the same time, we fully recognize that for many farms, the most rational step remains targeted repairs of the classic asymmetric running gear, where specifically the left drive half-axle fails. Purchasing the ZP 01.625 half-axle in a complete assembly with a cam clutch and wheel is the fastest and most dependable way to overhaul the drive side of your ZM-60 or ZM-60A running gear. You receive a factory-calibrated unit featuring precisely dialed-in clearances between the ZP 01.102 half-clutch and ZM 01.180 hub cams, exact spring tensions, professionally pressed-in NEN 400003 cermet bushings, installed 11206 bearings, and a secured ZPT 1.6.2 wheel.

Supplying the assembled block eliminates the need for complex workshop fitting, bushing pressing, or uncoupling clearance adjustments—the unit mounts directly to the frame via the H 026.058 housing mounting feet and connects immediately to the drive chain. Contact our sales department for consultation—we will help select the exact configuration matching your grain thrower's specific type and condition, organizing prompt delivery to quickly restore your machinery to full working order.