Gorman-Rupp Pump 610M20B-B

Pump and Seal Disassembly and Reassembly

Familiarize yourself with the manual

Shut off the incoming power to the motor and lock it out

Allow the pump to completely cool if overheated

Check the temperature before opening any covers, plates, or plugs

Close the suction and discharge valves

Vent the pump slowly and cautiously

Ensure safety measures for volatile and/or flammable liquids

Inspect the impeller for cracks or wear

Does the impeller have wear rings?

Is the impeller cracked or badly worn?

Replace the impeller if it is cracked, badly worn, or has wear rings that require replacement

Slide the impeller onto the shaft

Secure the impeller with the tab washer and impeller nut

Lubrication — Oil Lubricated Bearings

Refill the bearing housing with clean oil

Is the pump operated continuously or in an environment with rapid temperature change?

If yes, describe the frequency of oil changes needed

Remove the seal retaining ring with caution

Remove the spring centering washer

Lubricate the shaft and work oil up under the rubber bellows

Slide the rotating portion of the seal off the shaft

Use a stiff wire with a hooked end to remove the stationary seat and O-ring

Ensure no damage to the seal faces

Proceed to Seal Assembly if no further disassembly is required

Seal Reassembly and Installation

Lubrication — Oil Lubricated Bearings

Check the oil level at the oil cup

Is the oil level at the top of the cup?

Add SAE No. 30 non-detergent oil if lubrication is required

Remove the air vent before adding oil