Viking Pump LS4124A

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 old oil

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

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

Record the maximum pressure shown on the gauge

Tighten the locknut and replace the cap gasket and valve cap

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

Check end clearance with feeler gauge between idler and rotor faces, if possible

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

Gather necessary tools and materials, including Light Refrigeration Oil.

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.

Apply multi-purpose grease, NLGI # 2, to all lubrication fittings using a hand gun

Ensure grease is applied slowly

Apply lubricating fluid compatible with the process fluid to O-Pro™ seals

Check compatibility of grease with standard grease thickener types using Engineering Service Bulletin ESB-515

Contact Viking Pump® representative for specific lubrication questions