MX-P-3000/150m Bronze

Common issues

• Hydraulic drive motor leakage at the shaft seal - oil ingress into cargo is a contamination and pollution risk
• Line-shaft bearing wear from misalignment or cargo contamination
• Cavitation damage to the impeller during stripping or low tank level operation
• Corrosion/erosion of bronze wetted parts with aggressive or high-water-content cargoes
• Blocked or restricted suction strainer/bellmouth from cargo residue or scale
• Vibration from worn line-shaft bearings or a bent shaft after grounding or impact damage
• Hydraulic system contamination causing erratic pump speed control

Inspection checklist

• Check hydraulic oil condition and leak-test the pump top/shaft seal before and after cargo operations
• Verify pump performance (flow/discharge pressure) against the cargo plan at a known duty point
• Inspect line-shaft bearings for wear/play where accessible at dry-dock or pump removal
• Check the strainer/bellmouth for obstruction or damage
• Confirm vibration levels against baseline, especially during stripping or low-level running
• Test remote start/stop, speed control and emergency stop from the cargo control room
• Inspect the deck seal/gland for hydraulic and cargo leakage
• Verify earthing/bonding and ESD trip function

Service intervals

Typical wear limits

Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.

Critical spares

• Line-shaft bearing set (bronze/composite bearings)
• Mechanical shaft seal at the hydraulic motor interface
• Impeller and wear ring set
• Hydraulic drive motor seal kit
• Deck seal assembly

Safety

• Loss of containment at the deck seal or shaft is a major spill and fire/explosion risk - part of why it is tied into the vessel's ESD system
• Hydraulic oil leakage into cargo can contaminate the product and create pollution liability
• Work on submerged cargo pumps involves tank entry - full gas-free and enclosed-space entry procedure required
• Static bonding must be confirmed before handling flammable cargoes

Class survey

Cargo pumps and their ESD/remote control functions are surveyed as part of the tanker cargo system survey and Continuous Survey Machinery; class expects a satisfactory operational test, confirmation of the ESD trip, and evidence of hydraulic oil condition monitoring given the contamination risk to cargo.