Viking Positive Displacement Pump QS4124B

Ensure all safety measures are in place before starting

Insert length of hardwood or brass through port opening to keep shaft from turning

Bend up tang of lockwasher and remove locknut and lockwasher from shaft

Loosen set screws and remove bearing housing assembly from bracket

Ensure correct spacer coupling gap for pump size

Remove half round rings under inner spacer collar from shaft (K, KK, L, LQ, LL, and LS sizes only)

Loosen gland nuts and remove T-bolts securing the O-Pro™ Barrier

Select the appropriate oil type based on temperature

Verify the oil quantity for each reducer size

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

Drain the old lubricant after 100 hours of operation

Select the oil type based on temperature conditions

Verify the oil quantity for each size

Drain existing oil from the reducer

Refill with the selected oil type to the proper level

Is the lubricant level correct after refill?

Ensure initial packing adjustment is done carefully

Is the packing gland over-tightened?

Does the inspection reveal need for packing gland adjustment?

Does the inspection reveal need for packing replacement?

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

Ensure pressure in the chamber is completely vented through appropriate openings or connections.

Lock out or make non-operational the driving means (motor, turbine, engine, etc.).

Identify the liquid the pump has been handling and understand the necessary safety precautions.

Obtain and review the material safety data sheet (MSDS) for the liquid.

Mark valve and head before disassembly to ensure proper reassembly.

Measure and record length of extension of adjusting screw.