Viking Pump RS327A

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

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 the pump is not running and all power to drive the pump is locked out

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

Rotate the bearing housing clockwise until it cannot be turned anymore

Ensure the rotor is all the way forward and touching the head

Make a mark on the outside diameter of the bearing housing and a corresponding mark on the bearing bracket

Rotate the bearing housing counter clockwise past the mark by 6.09 in. (155 mm) or 9.09 in. (231 mm)

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

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.

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.

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.