Wanner Engineering Pump G-25-I

Measure the inlet pressure or vacuum with a gauge

Is the vacuum at the pump inlet exceeding 7 in. Hg (180 mm Hg)?

Check the inlet piping system for blockages if vacuum exceeds 7 in. Hg

Check if the pump inlet is located above the supply tank

Replenish the fluid supply if too low

Ensure the pump is turned off and cooled down

Gather necessary tools and materials for oil change

Remove the drain plug cap (34) at the bottom of the pump

Ensure all oil and accumulated sediment have drained out

Inlet and Outlet Valve Inspection

Replace worn spring retainer (16)

Is the valve spring (14) shorter than a new spring?

Replace the valve spring (14) if shorter

Replace excessively worn valve poppet (13)

Inspect valve seat (12) for wear and replace if necessary

Install a new O-ring (11) on the valve seat (12)

Clean valve ports and shoulders with emery cloth

Ensure all safety precautions are taken for safe handling of the fluid being pumped.

Provide adequate catch basins for fluid drainage.

Use appropriate plumbing from drain ports when flushing the pump and system with antifreeze.

Shutdown Procedure During Freezing Temperatures

Adjust the discharge pressure regulating valve to minimum pressure.

Drain supply tank and open any draincocks in system piping to collect drainage.

Remove plug (4) from manifold and collect drainage.

Ensure the pump is turned off and cooled down

Gather necessary tools and materials for oil change

Remove the drain plug cap (34) at the bottom of the pump

Ensure all oil and accumulated sediment have drained out

Record the oil viscosity in cST