The Gorman‑Rup Pump GRP33-07B

Ensure the valve is in a safe state for maintenance

Gather necessary tools and materials

Apply water-resistant grease to the lip seal, O-ring, and plunger rod before reassembly

Add water-resistant grease through the grease fitting weekly

Is the valve sticking or operating erratically?

If valve sticks or operates erratically

Apply a liberal amount of water-resistant grease to the plunger rod using a small brush

Clean Pressure Relief Valve if equipped

Inspect, Clean, Adjust, Repair or Replace as Necessary

Inspect, Clean, Adjust, Repair or Replace as Necessary

Inspect, Clean, Adjust, Repair or Replace as Necessary

Inspect, Clean, Adjust, Repair or Replace as Necessary

Review all SAFETY information in Section A.

Familiarize yourself with the manual.

Disconnect or lock out the power source to ensure the pump remains inoperative.

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.