Drive-Side Shaft Support Assembly for SICOMA MAO 3000/2000

This complete Shaft Support Assembly Kit is arranged to perform a total restoration of the Drive Side (Motor Side) bearing and sealing group on SICOMA MAO 3000/2000 Twin Shaft Concrete Mixers.

When it's mounted, it will be positioned at the critical interface between the mixing tank and the gearbox (reducer). This assembly operates under high torque and vibration in ready-mix concrete production since the kit comes with one of the most complete packages that includes many sicoma spare parts.

Designed for heavy-duty batching plant maintenance, this overhaul set includes all OEM-quality components required to align the shaft, support radial loads, and—most importantly—prevent concrete slurry from contaminating the expensive gearbox and main bearing. Using this comprehensive kit ensures all wear parts are replaced simultaneously, resetting the "maintenance clock" of the twin shaft concrete mixer.

Kit Contents: What’s in the box?:

(Note: This kit is specific to the Drive Side of the MAO 3000/2000 series. Parts differ from Non-Drive and MAO 1500 models.

• 1x CRO52 – Main Shaft Bearing (Spherical Roller Type, e.g., 23122 CC)
• 1x Drive Side Front Flange Cover – (Model Specific Interface)
• 1x 0529G0006B1 – Vulkandisk (Yellow Elastic Wiper/Damper)
• 1x SCAB-600-230 – Blue Intermediate Seal (Dust Ring)
• 1x MOB08 – Intermediate Bushing (Shaft Sleeve)
• 1x MOSA14 – Protective Bearing Block (Grease Ported)
• 1x MOSAP10 – Main Bearing Housing (Support)
• 1x 0228G0008L1 – Bearing Outer Cover (Flanged)
• Set: Complete Static O-Ring Set (SCAB-400-239, PA124, PA125, PA126)

Component Insights & Functions:

• CRO52 – Main Shaft Bearing: This heavy-duty spherical roller bearing 23122 CC, sits on the drive side. It handles the shaft's weight and the huge torque reaction forces from the gearbox. Its self-aligning capability is crucial for compensating for minor shaft deflections during heavy mixing loads.
• Drive Side Front Flange Cover: This is the primary anchor point that bolts the entire bearing assembly to the mixer tank on the motor side. It is reinforced to handle the vibration transmitted from the drive train.
• 0529G0006B1 – Vulkandisk (Elastic Disc): This polyurethane disc works like a vibration isolator. It takes in high-frequency shock loads from the mixing arms so they don’t harm the gearbox. It helps the transmission's output shaft avoid damage from stress by reducing these forces.
• SCAB-600-230 – Blue Intermediate Seal: Acting as the "First Responder" against contamination, this blue wiper seal prevents abrasive grit and concrete slurry from reaching the delicate inner oil seals. On the drive side, keeping this area clean is vital to prevent slurry from migrating toward the gearbox seals.
• MOB08 – Intermediate Bushing (Shaft Sleeve): This hardened steel sleeve acts as a sacrificial wear surface. It allows the seals to run on a replaceable part rather than grooving the expensive main drive shaft, significantly reducing long-term repair costs for the concrete mixer.
• MOSA14 – Protective Bearing Block: The foundation of the assembly is a huge 16.1kg ductile iron structure. It includes built-in grease ports, which direct lubrication straight into the sealing labyrinth. This sets up a protective grease barrier stopping anything from getting inside.
• MOSAP10 – Main Bearing Housing: The rigid steel enclosure that secures the CRO52 bearing in its precise axial position. It ensures the bearing race does not spin within the housing under high torque conditions.
• 0228G0008L1 – Bearing Outer Cover: This flanged cover applies the necessary axial clamping force to the entire sealing stack. It also houses additional air purge or grease connections, ensuring the drive-side seals remain pressurized.
• Static O-Rings (Set): A complete set of green and black elastomeric rings designed to seal the metal-to-metal interfaces between housings, ensuring no static leakage occurs even under vibration.

Technical snapshot

• Mixer Model: SICOMA MAO 3000/2000 (Heavy-Duty Series)
• Position: Drive Side (Motor / Gearbox Side)
• Operation: Complete Drive-End Overhaul
• Compatibility: Strictly for Drive Side (Not for Non-Drive)

Why replacement matters?:

Failure on the Drive Side is doubly expensive because it puts the Gearbox (Reducer) at risk.

• Gearbox Threat: If seals fail, concrete slurry can bypass the bearing and enter the gearbox output seals, destroying the transmission.
• Bearing Seizure: Contaminated grease leads to bearing failure, which can lock the shaft and overload the electric motor.
• Operational Risk: Misalignment here causes vibration that damages the entire drivetrain of the central mixing plant.

What to check before ordering:

This kit is a vital component in our Sicoma Twin Shaft Concrete Mixer Spare Parts inventory.

• Exclusive Fitment: This kit is made to fit the Drive Side of the SICOMA MAO 3000/2000. It does not work with the Non-Drive side or with smaller mixers like the MAO 1500.
• Recommendation: Cross-checking against the mixer serial number in the Sicoma spare parts catalogue is mandatory. Drive side flanges often differ from Non-Drive flanges due to gearbox mounting requirements.

Installation notes:

• Procedure: Complete disassembly is required. Ensure the shaft surface where the gearbox connects is protected during work.
• Alignment: Critical on the drive side. The housing must be perfectly centered to ensure the gearbox input shaft aligns with the mixer shaft.
• Bearing Fit: Install the CRO52 using induction heating or a professional press. Do not use force, as this can damage the bearing raceways.
• Lubrication: Pre-grease all seals (Vulkandisk, Blue Seal) to prevent dry friction during the first rotation.
• For critical maintenance, installation should be performed by a qualified technician.