Cornell Pump Company Pump 12NHG28

3200-992 Cutter Modification Kit — Adjusting

Ensure all safety precautions are in place

Disconnect external connections to gain access to suction inlet of pump

Isolate and lockout all power to the pump and motor

Remove the coupling guard for manual rotation of the pump

Loosen cap screws holding stationary cutter plate to volute casing or suction cover

Bottom out the stationary cutter plate to the rotating cutter ring

Set stationary cutter plate to rotating cutter ring clearance between .010"-.020" using adjustable set screws

Ensure the pump is not operating before starting the oil change.

Check the serial number plate for a 'K' to confirm oil lubrication.

Locate the drain plug at the bottom of the frame.

Place a suitable container under the drain plug to collect old oil.

Remove the drain plug and allow the oil to completely drain out.

3200-901 Lubrication Instructions — Grease Lubricated Frame Pumps (Frame sizes 2-5-11 and EM309)

Enter the total running time between regreasing (hours)

Enter the approximate amount of grease per line fitting (cubic inches)

Select the grease used for these bearings

Remove plastic cover from zerk fittings and ensure cleanliness

Use hand-operated grease gun and pump grease into each bearing cavity

Ensure surplus grease goes through the bearing into the center part of the frame

Ensure grease and fittings are absolutely clean

3200-901 Lubrication Instructions — Grease Lubricated Frame Pumps (Frame sizes 6-7-8-16)

3200-902 Lubrication Instructions — Oil Lubricated Frame Pumps (F5K)

Verify frame size and oil capacity

Is the oil renewal interval within 3-4 months?

Measure the bearing frame temperature at the drain connection

Select the oil type based on temperature

Add oil through the pipe plug opening at the top of the housing

Fill oil to the level indicated on the side of the housing

Ensure no dirt and moisture entered during oil addition

Is the oil level maintained when pump is not operating?

3200-326 Startup Checklist — Instructions for Pumps with Balance Line and Wear Rings

Is the wear ring clearance within acceptable limits?

Inspect balance lines for obstructions

Check balance lines for pinching, bending, or corrosion

Replace wear rings if clearance exceeds .03" per side

Replace balance lines if pinched, bent, or corroded