Viking Pump Q4124A

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

Place a container under the reservoir to catch old oil

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

Check if the reservoir is completely empty

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

Place a container under the reservoir to catch the old oil

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

Check for any metal particles or contaminants in the drained oil

Measure one pint of Light Refrigeration Oil

Select the oil type based on temperature conditions

Verify the oil quantity for each Viking reducer size

Drain the old oil from the Viking reducer

Refill with new lubricant to the proper level

Is the oil filled to the proper level for the selected size?

Ensure initial packing adjustment is done carefully

Is the packing gland over-tightened?

Does the inspection reveal the need for packing gland adjustment?

Does the inspection reveal the need for packing replacement?

Contact Viking Pump® representative for Engineering Service Bulletin ESB-521 regarding repacking pump