Carter Mechanical Fuel Pump System M6626 Instruction Manual

1. Introduction

This manual provides essential information for the safe and effective installation, operation, and maintenance of your Carter Mechanical Fuel Pump System, model M6626. Designed with over 100 years of OE experience, Carter Fuel Systems products are engineered for quiet operation, durability, resistance to contamination, and ease of installation. Please read this manual thoroughly before proceeding with any procedures.

2. Package Contents

Verify that all components are present before beginning installation:

• Carter Mechanical Fuel Pump System (M6626)
• Mounting Gasket (if applicable)
• Installation Hardware (if applicable)

Figure 2.1: Overview of the Carter Mechanical Fuel Pump System M6626, including the main pump unit and a new gasket.

3. Vehicle Compatibility

The Carter Mechanical Fuel Pump System M6626 is compatible with a wide range of vehicles. Please ensure your vehicle's make, model, and year are listed below for proper fitment:

• Buick: Skylark (1977-1979)
• Chevrolet: Blazer (1973), K5 Blazer (1975-1986), C10 (1976-1986), C10 Suburban (1973-1986), C20 (1976-1987), C20 Suburban (1973-1986), C30 (1976-1986), Camaro (1977-1987), Caprice (1973-1986), El Camino (1971-1987), B60 B6P042 (1985-1989), G10 (1976), G20 (1976), G30 (1976), Impala (1973-1985), K10 (1975-1985), K10 Suburban (1975-1977), K20 (1975-1977), K20 Suburban (1975-1977), K30 (1977), Laguna (1973-1976), C10 Pickup (1973), Malibu (1973-1982), Monte Carlo (1972-1976), Nova (1972-1979), P10 (1975-1978), P20 (1980-1987), P30 (1975-1988), R30 (1987-1988), C15 (1982-1985), C35 (1983-1990), C50 (1985-1990), C20 Pickup (1973), C60 (1985-1990), C30 Pickup (1973), P30 Van (1974), Chevelle (1972-1973), P60 (1983-1988), Bel Air (1973-1975)
• GMC: B6000 B6P042 (1985-1989), C15/C1500 Pickup (1973), C15/C1500 Suburban (1973-1974), C25/C2500 Pickup (1973), C25/C2500 Suburban (1974), P35/P3500 Van (1974), P6000 (1985-1988), C1500 (1979-1986), C1500 Suburban (1979-1986), C2500 (1979-1986), C2500 Suburban (1979-1986), C3500 (1979-1986), K1500 (1984-1985), R3500 (1987-1988), C15 (1976), C15 Suburban (1975-1978), C25 (1976), C25 Suburban (1975-1976), C35 (1976), Caballero (1979), G25 (1976), Jimmy (1973-1977), K15 (1975-1977), K15 Suburban (1975-1977), K25 (1975-1977), K25 Suburban (1975-1977), K35 (1977), P25 (1976), P2500 (1983-1987), P35 (1975-1978), P3500 (1979-1988), Sprint (1974-1976), C5000 (1985-1990), C6000 (1985-1990)
• Oldsmobile: Custom Cruiser (1977), Delta 88 (1977), Omega (1977-1979)
• Pontiac: Firebird (1979-1987), Phoenix (1977-1979)

4. Safety Information

WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.

Always observe the following safety precautions when working with fuel systems:

• Wear appropriate personal protective equipment (PPE), including safety glasses and gloves.
• Ensure the vehicle is cooled down and the battery is disconnected before starting work.
• Work in a well-ventilated area, away from open flames or ignition sources.
• Have a fire extinguisher readily available.
• Properly dispose of any spilled fuel or contaminated materials.
• If you are unsure about any step, consult a qualified automotive technician.

5. Installation Instructions

Installation of the Carter Mechanical Fuel Pump M6626 typically involves replacing an existing mechanical fuel pump. While the process is generally straightforward, specific steps may vary depending on your vehicle's make and model. It is recommended to consult your vehicle's service manual for detailed, model-specific instructions.

5.1. Preparation

1. Park the vehicle on a level surface and engage the parking brake.
2. Disconnect the negative terminal of the vehicle's battery.
3. Relieve fuel system pressure according to your vehicle's service manual.
4. Place a drain pan beneath the fuel pump area to catch any residual fuel.

5.2. Removal of Old Fuel Pump

1. Carefully disconnect the fuel lines (inlet and outlet) from the old fuel pump. Be prepared for some fuel leakage.
2. Remove the mounting bolts securing the fuel pump to the engine block.
3. Gently pull the old fuel pump away from the engine. Note the orientation of the pump and the fuel lines for reinstallation.
4. Remove any old gasket material from the mounting surface on the engine block. Ensure the surface is clean and smooth.

Figure 5.1: Side view of the fuel pump, highlighting the mounting flange and lever arm that interacts with the engine's camshaft.

5.3. Installation of New Fuel Pump

1. Apply a thin layer of RTV sealant or a suitable gasket adhesive to both sides of the new gasket (if not pre-applied).
2. Position the new gasket onto the fuel pump's mounting flange.
3. Carefully align the new Carter M6626 fuel pump with the mounting holes on the engine block. Ensure the pump's lever arm engages correctly with the camshaft eccentric.
4. Install the mounting bolts and tighten them evenly to the manufacturer's specified torque. Do not overtighten.
5. Reconnect the fuel lines to the appropriate inlet and outlet ports on the new fuel pump. Ensure connections are secure and leak-free.

Figure 5.2: Top view of the fuel pump, illustrating the inlet and outlet connections for fuel lines. Ensure proper connection to prevent leaks.

5.4. Post-Installation Check

1. Reconnect the negative battery terminal.
2. Start the engine and check for any fuel leaks around the pump and fuel line connections.
3. Allow the engine to run for a few minutes to ensure proper fuel delivery and pressure.
4. Turn off the engine and re-check for leaks after the system has been pressurized.

6. Operation

The Carter Mechanical Fuel Pump M6626 operates by converting the rotational motion of the engine's camshaft into a reciprocating motion that drives a diaphragm within the pump. This action creates suction to draw fuel from the fuel tank and then pushes it under pressure to the carburetor. The pump is designed for smooth and powerful fuel transfer, ensuring consistent fuel supply to the engine.

Being located outside the fuel tank, this mechanical pump offers enhanced protection from corrosion and exposure to contaminants, contributing to its durability and reliable performance.

7. Maintenance

Regular inspection of your fuel pump and associated components can help ensure long-term reliability:

• Visual Inspection: Periodically check the fuel pump and fuel lines for any signs of leaks, cracks, or damage.
• Connection Integrity: Ensure all fuel line connections remain tight and secure.
• Fuel Filter: Regularly replace your vehicle's fuel filter according to the manufacturer's recommendations to prevent contaminants from reaching the fuel pump and carburetor.
• Mounting Security: Verify that the fuel pump remains securely mounted to the engine block.

8. Troubleshooting

If you experience issues with your fuel system, consider the following common troubleshooting steps:

If troubleshooting steps do not resolve the issue, consult a certified mechanic.

9. Specifications

10. Warranty and Support

The Carter Mechanical Fuel Pump System M6626 comes with a reassuring 12-month limited warranty. This warranty covers defects in materials and workmanship under normal use and service.

For warranty claims, technical assistance, or further support, please contact Carter Fuel Systems customer service through their official website or authorized distributors. Keep your purchase receipt as proof of purchase.