Viking Pump H1224A

Ensure pressure in the chamber is completely vented

Lock out or make non-operational the driving means

Obtain and understand the MSDS for the liquid handled by the pump

Mark head and casing before disassembly

Remove nuts and capscrews from head

Use jack bolts to back head away from casing

Tilt top of head back when removing to prevent idler from falling

Ensure pressure in the chamber is completely vented through appropriate openings or connections.

Lock out or make non-operational the driving means (motor, turbine, engine, etc.).

Obtain and understand the material safety data sheet (MSDS) for the liquid handled by the pump.

Removal: Cartridge Mechanical Seal

Insert brass or plastic bar through port opening between rotor teeth to keep shaft from turning.

Bend up tang of lockwasher and remove locknut and lockwasher from shaft using a spanner wrench.

Loosen two set screws in the face of the bearing housing and remove the bearing housing assembly from the bracket.

Remove the pair of half round rings under the inner spacer collar from the shaft (AK, AL, K, KK, L, LQ, LL, LS sizes only).

Perform initial packing adjustment carefully

Ensure packing gland is not over-tightened

Inspect for need of packing gland adjustment or replacement

Contact Viking Pump® representative for Engineering Service Bulletin ESB-521 if needed

Check for occasional packing adjustment to maintain slight leakage

Determine if leakage can be reduced by gentle tightening

Ensure pressure in the chamber is completely vented through appropriate openings or connections.

Lock out or make non-operational the driving means (motor, turbine, engine, etc.).

Identify the liquid the pump has been handling and understand the necessary safety precautions.

Obtain and review the material safety data sheet (MSDS) for the liquid.

Carefully remove valve cap covering the adjusting screw.

Loosen locknut to allow pressure setting adjustment.

Install a pressure gauge in the discharge line.

Ensure pressure in the chamber is completely vented

Lock out or make non-operational the driving means

Identify the liquid the pump has been handling

Obtain and understand the material safety data sheet (MSDS) for the liquid

Loosen the two set screws in the outer face of the bearing housing

Rotate the bearing housing clockwise until it cannot be turned anymore

Mark the outside diameter of the bearing housing and the pump bracket