Viking Pump H4124A

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?

Initial Bearing Housing Adjustment

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

Final Bearing Housing Adjustment

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

If possible, check end clearance with feeler gauge between idler and rotor faces

Remove valve cap covering the adjusting screw

Loosen locknut on the adjusting screw

Install a pressure gauge in the discharge line

Turn the adjusting screw to adjust pressure setting

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 locknut and replace cap gasket and valve cap

Remove any visible debris from the pump exterior

Was the pump exterior wiped down with a clean cloth?

Clean the pump casing thoroughly

Inspect and clean grease fittings

Is the pump free of dirt and grease?

Note any areas that require further cleaning or attention

Ensure pump, drive, and motor were properly aligned during assembly

Recheck alignment after pump unit installation

Check pump ports for proper position and squareness

Shim or move the pump as required

Ensure piping is not forced to line up with ports

Flexible Coupling Alignment Check

Remove any coupling guards or covers

Check alignment of coupling halves using a straightedge