Viking Pump M4124A

Remove valve cap covering the adjusting screw

Loosen locknut on the adjusting screw

Install a pressure gauge in the discharge line

Adjust the pressure setting by turning the adjusting screw

Close the discharge line beyond the pressure gauge

Limit the operation time to prevent rapid temperature rise

Ensure the pump is turned off and isolated from the power source

Gather necessary tools and materials, including Light Refrigeration Oil and a container for old oil

Check if the reservoir is empty before starting the procedure

Place a container under the reservoir to catch the old oil

Open the drain plug and allow the old oil to completely drain out

Ensure the pump is turned off and isolated from the power source.

Gather necessary tools and materials, including Light Refrigeration Oil compatible with Neoprene seal.

Place a suitable container under the reservoir to catch the old oil.

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

Measure one pint of Light Refrigeration Oil.

Select the oil type based on temperature conditions

Verify the oil quantity for each Viking reducer size

Fill the Viking gear reducer with the correct type and quantity of oil before start-up

Drain the old lubricant after 100 hours of operation

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

Rotate the bearing housing in a clockwise direction until it cannot be turned any more

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

Make another mark on the pump bracket per 'Table 4' on page 14

Rotate the bearing housing in a counter clockwise direction until the mark on the outside diameter of the bearing housing lines up with the second mark on the pump bracket