CH&E 6400 Cast Iron 2″ Diaphragm Pump & Repair Parts

The CH&E 6400 Cast Iron 2 inch Diaphragm Pump is a heavy-duty, self-priming pump built for operators who need strength, durability, and consistent output in demanding field conditions. Its solid cast iron housing delivers superior resistance to wear, impact, and abrasion, making it the preferred choice over aluminum alternatives in applications where the pump is exposed to continuous heavy use, aggressive fluids, or rough handling on tough job sites.

The CH&E 6400 Series handles clean water, muddy water, light slurries, and solids-laden fluids without requiring manual priming between cycles. It is designed to run dry indefinitely without internal damage and automatically re-primes when seepage reappears, making it a dependable solution for seepage dewatering, septic tank cleaning, industrial waste pumping, marine tank applications, small wellpoint systems, and dewatering in sandy, muddy, or debris-filled water.

The 6400 Series is also compatible with Magnum Power Products Mud Hog and Generac Magnum MCP diaphragm pump configurations, including the MCP 6437 and MCP 6438. Ken’s Distributing Company stocks the complete range of genuine CH&E 6400 Series cast iron repair parts. Contact Kendisco at 800-575-1935 for part availability, current pricing, and expert technical support.

Key Features of the CH&E 6400 Cast Iron 2″ Diaphragm Water Pump

• Cast iron housing for maximum strength, wear resistance, and impact durability
• 2 inch inlet and outlet ports for efficient, controlled fluid transfer
• Self-priming diaphragm design for fast, reliable startup without manual priming
• Runs dry indefinitely without damage to internal components
• Automatically re-primes when seepage reappears
• Handles clean water, muddy water, slurries, and solids-laden fluids
• Multiple diaphragm material options for broad fluid and chemical compatibility
• Compatible with gas engine, electric motor, and hydraulic motor drive configurations
• Simple, low-maintenance design engineered to reduce operational downtime

Applications and Industries Served

The CH&E 6400 Cast Iron 2 inch diaphragm pump is trusted across a wide range of industries and job site environments where durability and consistent output are critical. Common applications include:

• Construction: Trench dewatering, foundation drainage, and controlled site water management
• Mining: Pit dewatering and abrasive slurry transfer in continuous-duty operations
• Industrial: Industrial waste pumping, process water handling, and plant maintenance
• Municipal: Bypass pumping and sewer maintenance operations
• Marine: Marine tank pumping and bilge water removal
• Sanitation: Septic tank cleaning and waste fluid transfer
• Agricultural: Wellpoint systems and field drainage in demanding conditions
• Emergency Response: Flood cleanup and storm water removal in sandy or muddy conditions

6400 Series vs. 5400 Series: Cast Iron vs. Aluminum

The CH&E 6400 and 5400 Series are both 2 inch diaphragm pumps that share the same internal drivetrain and mechanical components. The primary difference is the housing material. Choosing between cast iron and aluminum depends on your operating environment, duty cycle, and portability requirements.

CH&E 6400 Cast Iron 2″ Diaphragm Water Pump Repair Parts List

The following parts reference covers all serviceable components in the CH&E 6400 Series Cast Iron 2″ diaphragm water pump. Use the part numbers below to identify and order the correct replacement components for your pump configuration.

Wetted-End and Fluid-Handling Components

Diaphragm Options

The CH&E 6400 Cast Iron 2 inch diaphragm pump is available with five diaphragm material options. Selecting the correct material for your fluid type and operating environment is essential for maximizing diaphragm service life and maintaining consistent pump output.

Pump Frame and Mechanical Components

Gear Case Components

Bearings and Seals

Drive Adapter and Pinion Options

The CH&E 6400 Cast Iron 2 inch diaphragm pump is compatible with gas engine, electric motor, and hydraulic motor drive configurations. Select the correct adapter and pinion combination for your drive type and shaft specification.

Compatible Magnum Power Products and Generac Magnum MCP Models

The CH&E 6400 Series repair parts are compatible with the following Magnum Power Products Mud Hog and Generac Magnum MCP diaphragm pump configurations. If you service any of these models, the parts listed on this page apply directly to your pump.

• Magnum Power Products Mud Hog MCP 6437
• Magnum Power Products Mud Hog MCP 6438
• Magnum Power Products Mud Hog MCP 6411-1
• Magnum Power Products Mud Hog MCP 6411-3
• Generac Magnum MCP 6437
• CH&E 6411 Diaphragm Pump
• CH&E 6437 Diaphragm Pump
• CH&E 6438 Diaphragm Pump
• CH&E 6515 Series (shared drivetrain components)

Maintenance and Service Guidance

Regular inspection and timely replacement of wear components keeps the CH&E 6400 Cast Iron 2 inch diaphragm pump performing reliably across extended service cycles. The cast iron construction is highly durable, but the fluid-handling components require consistent attention, particularly in abrasive or continuous-duty pumping conditions.

• Inspect the diaphragm and flapper assemblies after every 250 hours of operation or when pump output drops noticeably
• Select the diaphragm material that matches your fluid type. Use Viton for chemical applications, Rubber or Neoprene for abrasive dewatering, Buna-N for petroleum-based fluids, and TPE for potable water service
• Check the connecting rod bearing and grease fitting at each scheduled service interval
• Inspect the oil seal and O-ring around the gear case for signs of leakage or deterioration
• Verify the correct drive adapter and pinion are installed for your engine or motor configuration before servicing the drivetrain
• Flush the pump thoroughly with clean water after handling abrasive, chemical, or solids-laden fluids
• Store the pump with the diaphragm in a relaxed position to extend its service life between deployments
• Confirm all fasteners are correctly torqued after any disassembly or component replacement

Frequently Asked Questions

What is the CH&E 6400 Cast Iron 2″ diaphragm pump used for?

The CH&E 6400 Cast Iron 2 inch diaphragm pump is used for seepage dewatering, construction site drainage, mining pit dewatering, septic tank cleaning, industrial waste pumping, marine tank applications, small wellpoint systems, and dewatering in sandy, muddy, or debris-filled water. Its cast iron housing and self-priming, dry-run-safe design make it a reliable choice for continuous-duty and abrasive pumping applications.

What is the difference between the CH&E 6400 and 5400 Series?

Both the CH&E 6400 and 5400 Series are 2 inch diaphragm pumps that share the same internal drivetrain and mechanical components. The 6400 Series uses a cast iron housing for maximum durability and wear resistance in continuous-duty and abrasive environments. The 5400 Series uses an aluminum housing, making it lighter and better suited to applications where the pump is frequently relocated between job sites. Where operating conditions are demanding and long-term durability is the priority, the 6400 Series is the stronger choice.

Can the CH&E 6400 Series pump run dry without damage?

Yes. The CH&E 6400 Cast Iron 2 inch diaphragm pump is designed to run dry indefinitely without internal damage. It also automatically re-primes when seepage reappears, making it a dependable choice for intermittent flow conditions common in seepage dewatering and wellpoint applications.

What diaphragm materials are available for the CH&E 6400 cast iron pump?

Five diaphragm materials are available: Neoprene for general-purpose water handling, Buna-N for petroleum-based fluids, TPE for potable water and food-grade applications, Rubber for abrasive slurry and dewatering work, and Viton for aggressive chemical and solvent applications. Matching the diaphragm material to your fluid type directly affects pump service life and reliability between scheduled service intervals.

Is the CH&E 6400 Series compatible with electric motor and hydraulic motor drives?

Yes. The CH&E 6400 Cast Iron 2 inch diaphragm pump is compatible with gas engine, electric motor, and hydraulic motor drive configurations. The correct adapter and pinion must be selected for each drive type. Use part P4856 for gas engine applications and part P4857 for electric motor configurations.

Are the CH&E 6400 Series repair parts compatible with Magnum Power Products and Generac Magnum MCP pumps?

Yes. The CH&E 6400 Series repair parts are compatible with Magnum Power Products Mud Hog MCP 6437, MCP 6438, MCP 6411-1, and MCP 6411-3 configurations, as well as the Generac Magnum MCP 6437. If you service any of these models, the parts listed on this page apply directly to your pump.

Where can I buy genuine CH&E 6400 Series cast iron repair parts?

Ken’s Distributing Company stocks the complete range of genuine CH&E 6400 Series Cast Iron repair parts, including diaphragms, flapper assemblies, bearings, seals, gear case components, and drive adapters. Call Kendisco at 800-575-1935 or contact us online for part availability, pricing, and technical support on all 6400 Series components.

Related CH&E Diaphragm Pump Parts

• CH&E 5400-6400 Repair Parts | 2″ Diaphragm Pump Parts Breakdown
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