Back Seal Cover (Rear Shield) – SICOMA MAO 3000/2000 – MOCP4

Functioning as an armored shield on the rear face of the sealing group, the MOCP4 Back Seal Cover is essential for maintaining the hermetic integrity of SICOMA MAO 3000/2000 Twin Shaft Concrete Mixers. Its fundamental role in concrete production is to isolate the sensitive bearing housing and oil chamber from the harsh external atmosphere of the batching plant.

Constructed from heavy-duty GGG50 Ductile Iron, it retains the internal oil bath while providing a critical maintenance interface. The integrated G 1/2" port allows for easy oil level monitoring (using the TAO02 indicator) and connects the Automatic Lubrication (Auto-Lube) lines to the system.

Technical snapshot:

• Part code: MOCP4
• Application:  Rear Face of Sealing Group of SICOMA MAO 3000/2000
• Material: GGG50 Ductile Iron
• Dimensions: Inner Diameter (ID) 230 mm | Height 40 mm.
• Weight: 4.5 kg
• Integration: Threaded ports for Oil Level Indicator and Air Purge/Grease lines.

Abbreviations:

• ID: Inner Diameter
• GGG50: Ductile Iron Grade (High Tensile Strength)

Why replacement matters?:

The cover acts as the final barrier for the oil chamber, and if it gets cracked, the following may happen:

• Structural Failure: A casting or deformation of the mounting face, compromising the seal.
• Leakage: A breach allows lubricant to escape, which is immediately replaced by the ingress of abrasive cement dust.
• Result: A contaminated oil film leads to rapid scoring of the main bearing elements and, ultimately, total system seizure.

What to check before ordering:

This component is a staple in our Sicoma Twin Shaft Concrete Mixer Spare parts inventory, but identification is key.

• Configuration: This MOCP4 configuration (6-bolt, 230mm ID) is engineered for the high-capacity SICOMA SrL MAO series.
• Compatibility Alert: It is distinct from the smaller, 4-bolt variants found on the MAO 1500 series.
• Recommendation: Validating the bolt pattern and ID against the concrete mixer's technical drawings or serial number before ordering.

Installation notes:

• Installing the TAO02 oil indicator onto the cover before mounting it to the mixer would make the process easier to complete.
• Securing the cover with VEA32 bolts (M14x40) paired with RD014 spring washers for vibration resistance is a step that should have been completed carefully.
• Leak prevention relies entirely on surface preparation. Before seating the cover, ensuring the housing face and O-ring groove are perfectly smooth and free of burrs is a matter.
• Finally, when tightening the bolts, strictly following a star-pattern sequence is necessary since it distributes the clamping load evenly, protecting the cast iron flange from stress fractures.