Viking Pump N324EH

Ensure all pressure in the chamber has been vented through appropriate openings or connections.

Lock out or make non-operational the driving means to prevent starting during maintenance.

Identify the liquid handled by the pump and understand necessary safety precautions.

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

Remove any circulation tubing connected to the seal gland.

Loosen setscrews on the seal collar to free the cartridge seal from the shaft.

Remove the two gland nuts and slide the cartridge seal out through the bearing housing opening.

Ensure all pressure in the chamber has been vented through appropriate openings or connections.

Lock out or make non-operational the driving means to prevent accidental start-up.

Identify the liquid handled by the pump and understand necessary safety precautions. Obtain and review the material safety data sheet (MSDS).

Mark head and casing to ensure proper reassembly.

Remove nuts from head using jackscrews to back head away from casing.

Use a hoist or cribbing to support head during removal.

Remove head gasket, idler, and bushing assembly.

Mark valve and head before disassembly to ensure proper reassembly

Measure and record length of extension of adjusting screw

Loosen locknut and back out adjusting screw until spring pressure is released

Remove bonnet, spring guide, spring and poppet from valve body

Clean and inspect all parts for wear or damage

Carefully remove valve cap, which covers adjusting screw.

Loosen locknut to unlock adjusting screw.

Install a pressure gauge in discharge line for actual adjusting operation.

Record the initial pressure reading from the gauge.

Turn adjusting screw in to increase pressure and out to decrease pressure.

Record the adjusted pressure reading from the gauge.

Bracket and Bushing Installation

Install bracket bushing with lubrication groove at 12:00 o’clock position if applicable.

Refer to Installation of Carbon Graphite Bushings if using carbon graphite.

Install bracket and bushing assembly on the casing ensuring proper alignment with locating pin.

Coat rotor shaft assembly with light oil and insert into bracket bushing.

Coat idler pin with light oil and place idler and bushing on idler pin in head.

Refer to Installation of Carbon Graphite Bushings if using carbon graphite.