Shaft Support Housing (Non-Drive) – SICOMA MAO 3000/2000 – MOSA13

The Shaft Support MOSA13 is an integral part of the Non-Drive Side (the side opposite the motor) shaft system on the SICOMA MAO 3000/2000 Twin Shaft Concrete Mixer. This sicoma spare part is designed to handle constant vibrations during ready-mix concrete production, and the MOSA13 plays two key roles essential to the mixer's durability.

First, it holds the main shaft bearing a spherical roller type like 23122, within a precise bore to support heavy radial loads. Second, it ensures the multi-stage sealing group stays aligned on a single axis. This solid structure plays a crucial role in keeping concrete slurry out during the intense work of batching plant operations.

Technical snapshot:

• Part code: MOSA13
• Application: SICOMA MAO 3000/2000 Twin-Shaft Concrete Mixer
• Position: Non-Drive Side (Opposite Motor Side)
• Material: High-strength Steel (Cast/Machined)
• Structure: A Widely-flanged for a rigid connection to the concrete mixer's tank.
• Machining: Inner diameters (ID) and sealing faces are machined to tight tolerances to maximize bearing service life.

Abbreviations:

• ID / OD: Inner Diameter / Outer Diameter

Why replacement matters?:

The housing dictates the geometry of the entire rotating assembly.

• Structural Failure: Loss of integrity (cracking) or wear in the internal bearing bore leads to immediate shaft misalignment.
• Bearing Spin: If the bearing's outer race begins to spin within a worn housing, the geometry is destroyed.
• Sealing Collapse: This renders the sealing elements useless, causing grease loss and allowing concrete slurry to invade the bearing zone.
• Result: Catastrophic damage to the shaft and costly downtime for the concrete mixer.

What to check before ordering:

As a critical component in our Sicoma Twin Shaft Concrete Mixer Spare parts inventory, correct identification is vital.

• Specific Design: The MOSA13 is designed specifically for the Non-Drive Side of MAO 3000/2000 series mixers.
• Compatibility Alert: It is not compatible with the Drive-Side housing or the MOSAP10 housing found on smaller mixers (like the MAO 1500).
• Recommendation: Verify the position (Non-Drive) and check the mixer serial number against the OEM catalogue.

Installation notes:

• To install the support you may need:
  • GRA30 Grain Espander M6 / L = 16 mm / UNI 5923: 1 pcs.
  • VB074 Screw TCEI M24x50 / 8.8 / UNI 5931: 6 pcs.
• Alignment: The housing requires an alignment that is perfectly square to the mixer tank.
• Surface Prep: Debris compromises this fit. Hence, mating surfaces require a finish that is spotless and burr-free to seat correctly.
• Bearing Fit: The bearing should never be hammered directly.
• Torque Strategy: The bolts securing the housing must be torqued in a criss-cross (star) pattern to distribute stress evenly across the flange.
• For critical maintenance, installation should be performed by a qualified technician.