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KEEN INDUSTRIAL PUMP CO. Inc.471 E State Route 250 East, Ashland, Ohio 44805PH: 419-903-0160 FX: 419-207-8031INSTALLATION AND SERVICE INSTRUCTIONSAND REPAIR PARTS LIST FOR 5-20HP TWO-STAGECENTRIFUGAL PUMPS (Using Urea Grease)P/N O&M-KI-TSC-UR1

High Capacity, High Pressure, Two Stage Centrifugal Pump-- Pump Unit Only-- Base Mounted, Direct Connected-- Base Mounted, Direct Connected, Complete W/MotorLocationThe pump should be located in an easily accessible place as close to the liquid source as possible. It should beinstalled in a clean, dry, well ventilated place, allowing room to inspect and service pump and driver.FoundationThe pump should be bolted securely to a rigid foundation, either concrete or steel. The 2” N.P.T. Suction can berotated at 180 degree intervals to 2 different positions. As standard, the suction will be on the right side when facingthe pump end. The 1 ½” N.P.T. Discharge can be rotated at 45 degree intervals to 8 different positions. As standard,the discharge will point up.Direct connected pumps should always be mounted in a horizontal position on a level foundation. It is the bestpractice on permanent installations to grout the baseplate in place, this is particularly important with the largermotors. The unit should be set in place with wedges under each corner, near the foundation bolts. Adjust wedgesand foundation bolts until the baseplate is level, in proper relation to the piping so the flexible coupling halves arealigned. About ¾” should be allowed under the baseplate for grouting. The foundation bolts should be drawn upevenly until snug. When the alignment is correct, grout the unit in place. Do not tighten foundation bolts or connectpiping until grout is thoroughly set.AlignmentDirect connected units are accurately aligned at the factory but all baseplates are flexible to some extent, andtherefore, must not be relied upon to maintain the factory alignment. A flexible coupling is intended to take care ofonly slight misalignment. Therefore the pump and driver must be carefully aligned at the installation. Parallelalignment can be checked by placing a straight edge across the coupling halves. It must rest evenly on both halves atfour positions spaced at approximately 90 degree intervals around the coupling. Angular alignment can be checkedwith a feeler gauge between the coupling halves at four points at approximately 90 degree intervals around thecoupling. The coupling halves are positioned on the shafts so there is a gap of 3/32” between the jaw of one half andthe body of the other half.On belt driven units the pump and driver shafts should be parallel; the pulleys or sheaves must be aligned also. Thiscan be checked by placing a long straight edge or tight string across the edges of the pulley or sheaves. The pulley orsheave on both pump and driver should be mounted as close to the bearing housing as possible to minimize theoverhang, allowing sufficient clearance for rotor and play.Belt DrivesAvoid a vertical drive on flat belt drives; an angle of 45 degrees or less between the line of shaft centers and thehorizontal is desirable. Normally the belt speed should not exceed 5000 feet per minute and the pulley ratio shouldnot exceed 5 to 1. The distance between the shaft centers should be at least twice the diameter of the larger pulley.Wide, single ply flat belts are preferable to double ply belts due to the lower bearing pressures that result. Adjustbelt tension just tight enough to prevent slippage; excess tension unnecessarily loads the bearings. V-belts do notrequire as much tension as flat belts.PipingPipes must line up and not be forced into position by unions. Piping should be independently supported near thepump so that no strain will be placed on the pump casing. Where any noise is objectionable, pump should beinsulated from the piping with rubber connections. Always keep pipe size as large as pump tapings or larger, anduse a minimum number of fittings to reduce friction losses.2

Suction PipingSuction pipe should be direct and as short as possible. It should be at least one size larger than suction inlet tapping,which would make it 2 ½” minimum. It should have a minimum of elbows and fittings. The piping should be laidout so that it slopes upward to pump without dips or high points so that air pockets are eliminated. The highestpoint in the suction piping should be the pump inlet except where liquid flows to the pump inlet under pressure. Afoot valve can be used to keep pump primed. Where liquid flows to the pump, it may be desirable to use a checkvalve in the suction line or discharge line to keep pump primed.To prevent air from being drawn into suction pipe due to a suction whirlpool, the foot valve should be submerged atleast three feet below the low water level. The suction pipe must be tight and free of air leaks or pump will notoperate properly. 75 psi Maximum suction pressureDischarge PipingDischarge piping should never be smaller than pump tapping and should preferably be one size larger. A gate valveshould always be installed in discharge line to serve as a shut-off or throttling valve if capacity is not correct. Toprotect the pump and foot valve from water hammer and to prevent backflow, a check valve should be installed inthe discharge line between the pump and the gate valve. 300 psi Maximum discharge pressureElectrical ConnectionsBe sure motor wiring is correct for voltage being used. Always use a separate fused switch / circuit breaker for thepump, and wire of sufficient size to keep voltage drop to a maximum of 5%. All motors, unless provided with builtin overload protection, must be protected with an overload switch, either manual or magnetic. This switch to besupplied by customer. Never install a pump without proper overload protection. Check local code requirements.PrimingThe pump must be primed before starting. Be sure pump case is filled with water before operating. The mechanicalshaft seal must never run dry. Remove the three top ¼” pipe plugs (27) while priming (one in each camber) toassure that all air is evacuated. The three individual chambers of the pump and the suction piping must becompletely filled before starting the motor. If pump does not start immediately, stop and reprime.RotationThe pump must run in direction of arrow on pump case. Three phase motors may run either direction so if rotationis wrong when first starting motor, interchange any two line leads to change direction.StartingWith all piping connected to the pump and the unit tightened down in place, check the alignment. If misalignment isapparent after grout has set, it must be corrected by placing shims under pump or driver. If the alignment is correctand the pump turns freely by hand, the unit is ready to start after it is primed.It is good practice to close the discharge valve when starting the pump as it puts less starting load on the motor.When the pump is up to operating speed, open the discharge valve to obtain desired capacity or pressure. Do notallow the pump to run for long periods with the discharge valve tightly closed. If the pump runs for an extendedperiod of time without liquid being discharged, the liquid in the pump case can get extremely hot.StoppingBefore stopping pump, close the discharge valve. This will prevent water hammer and is especially important onhigh head pumps. A properly installed check valve will perform the same function.Mechanical Seal LubricationThe pump is provided with an oil chamber which lubricates the seal face of the mechanical seal. The oil level shouldbe checked every 50 hours. Fill cavity through the oil cup (item 30) with S.A.E. No. 30 oil.NOTE: If the suction bracket is rotated to a different position, the oil cup must be removed and rotated so it willremain in a vertical position.3

Bearings – LubricationLubricate electric motor bearings in accordance with the manufacturer’s instructions.Pump bearings are sealed one side, open one side ball bearings that are lubricated by grease in the bearing bracket.Normally, these bearings require no further attention. This grease cavity must not be overloaded and should not befilled more than about half full. Shell Dolium R, Dolium BRB and Stamina RL2 are equivalent greases to be used.GREASES USED MUST BE FROM THE “UREA” FAMILY, PLOYUREA OR DIUREA.DO NOT USE LITHIUM BASE GREASE AS IT WILL CAUSE PREMATURE BEARING FAILURE.DO NOT MIX UREA AND LITHIUM GREASES !!!If, due to unusual operation conditions, it becomes necessary to revitalize the grease, proceed as follows:1. Remove bearings and shaft. (See instructions on “To Replace Bearings”)2. Clean out cavity between bearings.3. Replace bearings and pump shaft. NOTE: Bearing open sides should face in toward grease cavity with sealsfacing out.4. Fill cavity about ½ full (approx. ½ pound or ½ tube) of grease outlined above through top ¼” NPT.Bearing greases are usually a mixture of a thickener base, referred to chemically as soap, emulsified with alubricating oil, usually mineral or vegetable based. The soap base merely acts to keep the oil in suspension.When moving parts of the bearing come in shear contact with the grease, a small quantity of the oil will adhereto the bearing surfaces.The oil is picked up by the bearing (and removed from the grease) is gradually broken down by oxidation orlost to evaporation, centrifugal force, etc. The bearing cannot function properly unless this supply of oil keepsup with thedemand as the grease will oxidize or the oil in the grease may be depleted.Grease life cannot be measured accurately since such factors as speed, load, humidity, type of service andfrequency of lubrication all have to be considered. In applications where elevated temperatures, high speed,severe dirt, high humidity or other extreme conditions are encountered, particularly with open type bearings,accelerated deterioration of the grease may occur. In such cases, periodic inspection during the first few monthsof operation will provide the required frequency of re-lubrication.All grease should be free from dirt, abrasive matter, moisture, acid or alkali.Old grease should always be replaced with new grease during overhaul.Ball bearings are important for pump life and must be given proper care to allow reasonable life. Lack ofknowledge or proper maintenance frequently results in a service call that should have been avoided.ONLY POLYUREA / DIUREA BASE GREASES ARE TO BE USED TO LUBRICATE THESE PUMPS.THE FOLLOWING LIST REPRESENTS SEVERAL RECOMMENDED UREA BASE GREASES: SHELL – DOLIUM RSHELL – DOLIUM BRBSHELL – STAMINA RL2CHEVRON – SRI GREASE NLGI 2CHEVRON – BLACK PEARL NLGI 2EXXON – POLYREXPHILIPS – POLYTACTEXACO – POLYSTAR RB4

FreezingCare should be taken to prevent the pump from freezing during cold weather. It may be necessary, when thereis any possibility of this, to drain the pump when not in operation.Three individual chambers must be drained. These chambers include the suction (seal bracket) and the firstand second stage impeller chambers.A. To drain the suction chamber, remove the ¼ pipe plugs (27) that are in the bottom position, unless thesuction pipe is pointing down. If this is the case, drainage means must be provided in suction piping leadingto the pump.B. To drain the first and second stage impeller chambers, remove the two ¼” pipe plugs which are in thelower position of the case and the 1/8” pipe plug in the crossover casting.To Remove and Replace Worn Impeller and Wearing RingsTo service pump, the suction and discharge piping must first be disconnected.A. Remove back plate (25). Remove impeller cap screw (17) and washer in outer impeller eye. Remove tapbolts which hold volute case (21) to bracket (7). With two large screwdrivers on opposite sides of volutecase, pry evenly and carefully to get volute case and outer impeller off. Care must be exercised to avoidbending pump shaft. In the event that the impeller is extremely difficult to pull, it can be expanded bywarming with a torch. Be careful not to get it really hot. Then, before it has time to conduct heat to shaft,the impeller can be pried off with two screwdrivers, as described previously.B. Remove Inner impeller (13) using two screwdrivers and heat, if necessary. Be careful not to get shaft hot.Remove snap ring (12). Slide old seal (11) off shaft. Remove tap bolts (5) holding bracket (7) to bearingbracket (1) and pull bracket off shaft. Remove old floating seat and seat cup from bracket.C. Make sure the synthetic seat cup of the new seal is tight against the shoulder of the floating seat, withrounded edge at the rear to facilitate insertion. The seal is assembled this way when shipped. Wipe thelapped sealing face of the floating seat perfectly clean and oil face with a clean, light oil.D. Oil outer surface of the seat cup, using light oil (not grease) and push this assembly in the cavity of thebracket, seating it firmly and squarely. If necessary to use a piece of tubing to push it in, bear on the outeredge of the floating seat, never on the lapped sealing face.E. Replace lip seal (2) and lubricate oil seal face with S.A.E. No. 30 oil. Clean and oil the surface of the shaftwith a light oil. Make sure slinger (10) is in place. Bolt (30 ft-lbs) bracket (less impellers) back on thebearing bracket, being careful not to strike floating seat with shaft Wipe the face of the sealing washerperfectly clean, and oil with a clean light oil. It is extremely important that only clean oil be used on thesealing faces. Any dirt whatsoever may cause seal failure. Put the sealing washer and bellows assembly onthe shaft. Be sure sealing washer is in proper position. The notches on the washer should mate with lugs onthe retainer. Use a sleeve of proper diameter to slide assembly into place. Note: When sliding seal assemblyon the shaft, be sure to press only on tail sections of bellows and driving band. A smooth sleeve of about 19/32” diameter (1/32” larger than shaft), with a wall thickness of about ½”