Dishwasher Pump and Motor Casing Assembly (LG OEM)

Description

Genuine LG OEM Dishwasher Pump and Motor Casing Assembly – Part ABT72989206

Complete pump casing assembly including motor, impeller, seals, and housing. Fixes poor draining and grinding noise. Lay DW on its side to replace.

Part Number: ABT72989206

Replaces: PS12579574

Always verify compatibility using your appliance model number before ordering.

LG Dishwasher Pump Casing Assembly (Part # ABT72989206): Restore optimal water pressure, powerful wash spray coverage, and quiet circulation to your kitchen with this Genuine OEM LG Dishwasher Pump Casing Assembly. Measuring 8.03″ L x 5.98″ W x 5.91″ H and weighing 2.04 lbs, this heavy-duty molded housing component encases and protects the main wash circulation pump, heater element connections, and impeller housing beneath the dishwasher tub.

Mounted directly on the underside sump mechanism, this assembly directs high-pressure water flow from the circulation pump through the lower, middle, and upper wash arm conduits. By maintaining tight internal seals and precise fluid dynamics, it ensures that wash water is continuously reheated and pressurized throughout every stage of the cleaning cycle.

If this part fails, its internal impeller seals can wear out, the plastic casing can warp or crack, or debris can score the housing chamber. This leads to common operating issues, including dishes remaining dirty after a cycle, low or inconsistent water pressure to the spray arms, loud squealing, grinding, or whirring noises during operation, or water leaking from underneath the motor sump area.

Quick Info Compatibility: Precision-engineered for modern LG, LG Studio, and Sears Kenmore / Kenmore Elite built-in dishwashers. Advanced Features: Reinforced heat-resistant polymer casing, integrated stainless steel heating element plate header, high-flow manifold outlets, and precision internal shaft sealing ring. Fixes Common Issues: Resolves poor cleaning/spray performance, loud high-pitched squealing or grinding motor sounds, low water circulation pressure, and under-tub leaks near the main pump. Difficulty: Intermediate. A standard DIY replacement requiring basic tools (1/4″ nut driver, screwdrivers, and pliers), taking approximately 30 to 60 minutes to complete.

💡 Critical Diagnosis & Prevention Tip: Before installing the new pump casing assembly, inspect the internal impeller cavity for debris and check for shaft seal wear! Pro Tip: Over time, fine glass shards, hard water scale, or plastic fragments can bypass the tub filter screen and become trapped inside the pump casing. This creates drag on the impeller, causing high-pitched squealing or grinding noises and eventually burning out the shaft seal. Replacing the housing with this complete OEM pump casing assembly (ABT72989206) eliminates internal water bypass and restores whisper-quiet operation.

Step-by-Step Replacement Guidelines

1. Preparation: Turn off electrical power to the dishwasher at your home’s main breaker panel for safety, turn off the hot water shut-off valve, and disconnect the drain hose and water supply lines under the sink.

2. Pull the Appliance Out: Remove the mounting screws securing the dishwasher to the cabinet counter, then carefully pull the unit completely out and lay it on its back on a protective blanket.

3. Access the Main Pump Assembly: Remove the lower pan/bottom cover to gain full access to the circulation pump assembly attached to the central sump.

4. Remove the Old Casing Assembly: Disconnect the wiring harness plugs and heating element terminals. Loosen the hose clamps and mounting screws securing the pump casing to the sump body, then carefully pull the old assembly free.

5. Install the New Pump Casing: Align the new OEM ABT72989206 pump casing assembly onto the mounting shaft and sump connections. Tighten all retaining screws and hose clamps securely, reconnect the electrical terminal plugs and heater leads, set the unit upright, reconnect plumbing and power, and run a test wash cycle.