SPECIAL MECHANICAL SEALS: Extra care should be taken in the repair of these pumps. Be sure to read and follow all special instructions supplied with your pump.

SPECIAL INFORMATION MAINTENANCE

“Special Requirements for Reverse Rotation” 1. 2. Viking pumps are positive displacement pumps and must be provided with some sort of pressure protection. This may be a relief valve mounted directly on the pump, an inline pressure relief valve, a torque-limiting device, or a rupture disk, or other method. There are relief valve options available on those pump models designed to accept a relief valve. Options may include a return to tank relief valve. “Assembly” details on page 7.Shaft rotation determines which port is suction and which is discharge. Viking LVP pumps have internal casing/head lubrication lines. Ensure these lines are setup correctly prior to operation. See ROTATION: NOTE: Pump can be operated in reverse direction for short duration at low differential pressure to clean/flush out lines.3. Viking LVP pumps are clockwise rotation (from shaft to end) standard, but they operate well in a clockwise or counterclockwise rotation, with some simple rearrangement of parts. The relief valve and internal plugs must be rearranged for counterclockwise rotation. See section, page 7. PRESSURE RELIEF VALVES: If pump rotation is to be reversed during operation, pressure protection must be provided on both sides of the pump. 4. The relief valve adjusting screw cap must always point towards suction side of pump. If pump rotation is reversed, remove pressure relief valve and turn end for end or use external pressure relief means. 5. Pressure relief valves cannot be used to control pump flow or regulate discharge pressure.For additional information on pressure relief valves, refer to Technical Service Manual TSM000 and Engineering Service Bulletin ESB-31.

DANGER !

Before opening any Viking pump liquid chamber (pumping chamber, reservoir, relief valve adjusting cap fitting, etc.) Be sure:1. That any pressure in the chamber has been completely vented through the suction or discharge lines or other appropriate openings or connections.2. That the driving means (motor, turbine, engine, etc.) has been “locked out” or made non-operational so that it cannot be started while work is being done on pump. 3. That you know what liquid the pump has been handling and the precautions necessary to safely handle the liquid. Obtain a material safety data sheet (MSDS) for the liquid to be sure these precautions are understood.Failure to follow above listed precautionary measures may result in serious injury or death.

SUGGESTED REPAIR TOOLS: 1. Soft headed industrial hammer The following tools must be available to properly repair series LVP pumps. These tools are in addition to standard mechanics’ tools such as open- end wrenches, pliers, screwdrivers, etc. Most of the items can be obtained from an industrial supply house. 2. Allen wrenches (some mechanical seals and set collars) 3. Brass bar 4. Arbor press Series LVP pumps are designed for long, trouble-free service life under a wide variety of application conditions with a minimum of maintenance. The following points will help provide long service life.Pumps that are mounted directly to the motor will need to be removed from the mounting bracket to perform mechanical seal maintenance or replacement. CLEANING PUMP: Keep the pump as clean as possible. This will facilitate inspection, adjustment, and repair work. STORAGE: If pump is to be stored, or not used for six months or more, the pump must be drained and a light coat of light oil must be applied to all internal pump parts.Apply grease to the pump shaft extension. Viking suggests rotating pump shaft by hand one complete revolution every 30 days to circulate the oil. Tighten all pump assembly bolts before putting the pump in service after being stored.
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