Gorman-Rupp Pump 64K31-B

Lubrication — Oil Lubricated Bearings

Refill the bearing housing with clean oil

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

Change the oil more frequently if necessary

Refer to special instructions in Body Cover Replacement if replacement is needed.

Install a new body cover gasket.

Use a soft-faced mallet to tap the body cover into place on the dowel pins.

Secure the body cover with the attaching hardware.

Are the dowel pins fully seated into the body cover?

Return the pump to the factory if body cover replacement is required.

Install a new body cover gasket.

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

Inspect lubricant for evidence of rust

Inspect lubricant for moisture condensation

Is the lubricant suitable for current temperature conditions?

Consult factory or lubricant supplier for recommended oil grade in cold weather conditions

Shaft and Bearing Removal and Disassembly

Is there evidence of wear or damage on the shaft and bearings?

Place a drip pan under the bearing housing before removing the shaft and bearings.

Remove the oil cup and drain the bearing cavity if equipped with oil-lubricated bearings.

Disengage the attaching hardware and remove components

Use an arbor or hydraulic press to remove the oil seal from the bearing cap.

Tap the shaft and assembled bearings from the bearing housing using a block of wood.

Remove the oil seal from the bearing housing if equipped with one.

Clean and inspect the bearings in place.