Viking Pump AS4197

Danger! Before opening any Viking pump liquid chamber (pumping chamber, reservoir, relief valve adjusting cap fitting, etc.) be sure:

Pressure in the chamber has been completely vented through the suction or discharge lines, or other appropriate openings or connections.

The driving means (motor, turbine, engine, etc.) has been “locked out” or made non-operational, so that it cannot be started while work is being done on pump.

You know what liquid the pump has been handling and the precautions necessary to safely handle the liquid. Obtain a material safety data sheet (MSDS) for the liquid to be sure these precautions are understood.

Failure to follow above listed precautionary measures may result in serious injury or death.

When installing graphite bushings, extreme care must be taken to prevent breaking. Carbon graphite is a brittle material and easily cracked. If cracked the bushing will quickly disintegrate. Using a lubricant and adding a chamfer on the bushing and the mating part will help in installation.

A press was used for installation.

Did not stop pressing operation until bushing is in proper position, starting and stopping will result in cracked bushing.

Danger! Before opening any Viking pump liquid chamber (pumping chamber, reservoir, relief valve adjusting cap fitting, etc.) be sure:

Pressure in the chamber has been completely vented through the suction or discharge lines, or other appropriate openings or connections.

The driving means (motor, turbine, engine, etc.) has been “locked out” or made non-operational, so that it cannot be started while work is being done on pump.

You know what liquid the pump has been handling and the precautions necessary to safely handle the liquid. Obtain a material safety data sheet (MSDS) for the liquid to be sure these precautions are understood.

Failure to follow above listed precautionary measures may result in serious injury or death.

Loosen two screws in face of thrust bearing assembly.

If shaft cannot be rotated freely, turn thrust bearing assembly counter clockwise until shaft cannot be turned easily.

While turning rotor shaft, rotate thrust bearing assembly clockwise until noticeable drag occurs (this is zero end clearance).

Danger! Before opening any Viking pump liquid chamber (pumping chamber, reservoir, relief valve adjusting cap fitting, etc.) be sure:

Pressure in the chamber has been completely vented through the suction or discharge lines, or other appropriate openings or connections.

The driving means (motor, turbine, engine, etc.) has been “locked out” or made non-operational, so that it cannot be started while work is being done on pump.

You know what liquid the pump has been handling and the precautions necessary to safely handle the liquid. Obtain a material safety data sheet (MSDS) for the liquid to be sure these precautions are understood.

PRESSURE ADJUSTMENT If a new spring is installed or if pressure setting of pressure relief valve is to be changed from that which the factory has set, the following instructions must be carefully followed.

Carefully remove valve cap, which covers adjusting screw. Loosen locknut, which locks adjusting screw so pressure setting will not change during operation of pump.

Install pressure gauge in discharge line for actual adjustment operation.

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

With discharge line closed at a point beyond pressure gauge, gauge will show maximum pressure valve will allow while pump is in operation.

Warning: Ensure the pump is turned off and disconnected from power source before cleaning.

Is the pump disconnected from power source?

Upload a photo of the cleaned pump