Please make sure you have completed all the required fields. See Fig. 0000003229 00000 n
When constructed properly, overall vibrations can be substantially reduced because of the damping effect of the foundation mass. Tolerance table offers guidelines How accurate should alignment be? Watch this quick video we put together about Setting Pump Bases. Tolerances are provided in a system of Alignment Quality Grades. Found inside – Page 231If the shaft is beyond this tolerance, particularly if runout approaches or goes ... Oil Pump Alignment Methodologies Oil pump alignment is frequently out ... Two decades ago, John Piotrowski conferred upon the field an unprecedented tool: the first edition of This advantage should not be an excuse to neglect shaft alignment. Any condition where less than perfect surface contact is made between the underside of the machine’s feet and the surface of the base plate, or frame, is called soft foot. I quickly stated that they would let you obtain an average of 0.003” on the alignment. Alignment Tolerances. For horizontal systems, the process is carried out in two stages: Normally, a pump is fixed to its base and this is secured to a rigid foundation. We have been asked to align a fire sprinkler pump tomorrow. Found inside – Page 26Third , I took it back to the dealer that I had align the front end the first time . ... You've already overdone the wheel alignment tolerance bit . Later the unit is moved from the truck or warehouse/staging area to the foundation, consequently any semblance of an acceptable alignment tolerance is placed in jeopardy. These can allow sensitive height adjustment but can be prone to rusting or binding. A proper alignment will include aligning the pump shaft to the motor shaft in both the horizontal and vertical planes. Found inside – Page 35-96NEW DREDGE PUMPS . the installation of the dredge pumps , Sun could not join ... was not in alignment with the starboard dredge pump ; that Sun could have ... After grouting is completed, final alignment should be checked to be sure it is within allowable tolerances. ROTALIGN touch is the first laser shaft alignment tool fully designed to meet the requirements of industrial IoT with RFID, Wi-Fi, and cloud data transfer. Shaft to Shaft Axial Alignment Tolerances . The pumps provide reliable operation in a variety of applications, including hydronic heating andRead more 0000010453 00000 n
The correct nominal alignment Found insideSection 1. Fundamentals -- section 2. Basic data -- section 3. Practical -- section 4. Materials -- section 5. Characteristics -- section 6. Operation -- section 7. Types -- section 8. Application of larger power -- section 9. General. Shims can be bought commercially in a range of sizes and thicknesses or can be homemade, as required. Found inside – Page 147Use a dial indicator and reverse indication for parallel and angular coupling alignment (Figure 20.1). The tolerances shall be within 10.005 in. for both ... With the ALIGNMENT RELIABILITY CENTER 4.0 software, work orders may be sent via the cloud to a mobile ROTALIGN touch unit anywhere in the world. Failure to properly align a motor to the pump … Found inside – Page 3-33Another thing to look for is alignment pins to align the casing. ... If a pump is built using sealants it must be machined within a very fine tolerance. We went back to the laser alignment tool, and the transmitter/detectors were completely still. Vertical positioning adjustments involve the insertion of shims under the feet of a motor or pump, taking care to maintain good contact with the base. Found inside – Page 99As a general rule, the installation tolerances are • 1/8 inch in any direction of ... The pump package should not be leveled or aligned by tightening bolts. Found inside – Page 396Misalignment causes between 50 and 70% of all pump-bearing failures, so the purchaser may want to use stricter alignment tolerance and a laser indicator to ... 4. 0000010308 00000 n
I guess another important point to make would be that you only get one chance to level the baseplate. After it is grouted, that's it. It would help... Is your pump part of that group? In this case, the tables give consideration to the most commonly occurring machine types, their speed and, in certain cases, their coupling type. 5.8.1 Minimum continuous recommended flow. Acceptable alignment tolerances are a function of shaft speed, coupling type/geometry, and the distance between the driver and pump shaft ends. When a driver like an electric motor or a turbine is coupled to a pump, generator, or any other piece of equipment, it is essential that the shafts of the two pieces are aligned. Any misalignment can cause damage to the pump, motor and, indeed, the coupling. 5. 5 products. Found inside – Page 45Pump shafts operate within a limited eccentricity tolerance. A vertical, shaft-driven pump will not operate in a well that is not aligned but will operate ... When aligning a high-energy centrifugal pump to its driver (typically a large electric motor or a steam turbine), many variables must be taken into account to determine the acceptable tolerance, including speed, rated power, coupling design, spacer length and the end-users expectation for service life. Found inside – Page 416 8 10 12 14 16 18 20 Tolerance —. Fig . 11 Centrifugal - compressor train ( Bars ... The pump was restarted and vibration level and alignment monitored . This provides not only proof of final condition, but allows a starting point and historical data for the future. It is a 90 hp diesel engine with an idle speed of 1875 and a running speed of 1750 which is coupled by a Woods 11HS coupling that uses a Hytrel sleeve. When completing an installation, make sure each nut and bolt is tightened properly. Rigid couplings are generally used on vertical pumps; most horizontal pumps use flexible couplings. Found insidePump/Motor Alignment – Alignment of pump to drive motor splines needs to held to tight tolerances. Considerations are tolerance stickups, relative motion ... Shaft alignment kits are available starting at approximately $600.00. 3. Portable alignment positioners simplify the entire process including vertical, horizontal transverse and horizontal axial movements but are only cost effective for larger systems. Alignment Tolerances An alignment tolerance allows the alignment to be within an acceptable range of misalignment that does not affect the machine's ability to rotate properly. For alignment tools, customers may consult the following specialists (company names are linked): SKF. The latter can be either metallic or elastomeric. The suggested alignment tolerances shown here are general values based upon experience and general industry standards and should not be exceeded. 0000009394 00000 n
Part 2 of this standard provides definitions of terminology unique to the alignment of machinery that has been in common use among engineers and technicians working in the field. It is important to correct soft foot problems before tackling shaft alignment issues. 7. This tolerance is probably too close for general purpose pumps, but if one always aligns to this, the next time it is checked, one will be able to see if there have been settling foundations, pipestrain, poorly adjusted pipe hangers, etc. The publication also ponders on high speed pumps, double-case pumps, hydraulic power recovery turbines, and shaft design and axial thrust. The book is a valuable source of data for pump designers, students, and rotating equipment engineers. 51. At ANSI (American National Standards Institute) in the USA, work has been conducted for some time aimed at standardising alignment tolerances for axially coupled machines. Found inside – Page vShaft Alignment Handbook: Second Edition, Revised and Expanded, John Piotrowski 99. Computer-Aided Design of Polymer-Matrix Composite Structures, ... 0000002088 00000 n
Make a record of the final alignment tolerance on an alignment form or data sheet. 0000005019 00000 n
Unless more Overtime is the goal, make sure your alignment tool has both short flex and spacer shaft tolerances. Hot See Fig. By G.S.Crisi Date 03-04-2013 22:36. The pumps are engineered for exceptional performance and rugged durability. Similar solutions have been provided in hydraulic pump applications. For alignment tools, customers may consult the following specialists (company names are linked): SKF. The Importance of Shaft Alignment. Tight Tolerances: Pump Piping Nozzle Loads Can Impact Reliability. By Yoseline Minero Villegas. Found inside – Page 444This coupling and shaft must be in very close alignment or vibration will occur ... If two shafts are aligned to within tolerance while the motor and driven ... For more information about alignment or other pump issues, please feel free to contact Chemac via email at chemac@chemacinc.com or by calling us at 1-201-934-3300 or toll free at 1-800-217-8677 (USA & Canada). Bell & Gossett’s complete line of in-line and base-mounted centrifugal pumps and circulators can handle virtually any HVAC requirement. Elastomeric couplings are not suitable for use at high temperatures or in some chemical environments where they may be subject to degradation. All types of machines having shafts as an integral part of their structure, experience problems related to shaft alignment. Shaft alignment is a method or procedure by which shafts of machines such as motors and turbines are connected to a generator or pump in proper alignment. Found insideProduction tolerances being what they are, the alignment between the engine and ... to self-align with the engine's crankshaft and the transmission pump. 55. 0000001088 00000 n
(3) becomes-[1 81 csc0(L P 2 cot20 + L2)1/2]2 (4) The alignment tolerance in the horizontal direction can be expressed as Fig. Only 7% of measured machines today fall within acceptable alignment tolerances. Enter the dimensions from sensors to the coupling and to the machinery feet into the laser system (Figure 1). View the machine from the pump end, zero the indicators on the left, and then rotate and read on the right. The book is Reference material on rotating machinery basics, pump overhaul, mechanical seals, basic vibration, and shaft alignment. Make sure that you always view the pump from the same direction in order for … Found inside – Page vShaft Alignment Handbook: Second Edition, Revised and Expanded, John Piotrowski 99. Computer-Aided Design of Polymer-Matrix Composite Structures, ... Most major belt and pulley manufacturers specify these tolerance alignment values. I later double checked this and determined I was wrong. "The only correct way to express shaft alignment tolerances is in terms of alignment conditions at the coupling" per Heinz P. Bloch, a top Alignment Authority, as published in the December issue of PUMPS & SYSTEMS. The maximum shaft Related Papers. Various devices are available for measuring alignment offsets: feeler gauges, callipers, dial indicators and laser alignment tools. A NEW SHAFT ALIGNMENT TECHNIQUE B.C. Check the shaft run-out for bent shafts and loose bearings (maximum of 0.1 mm (0.004”) for 0 – 1500 RPM and 0.050 mm (0.002”) for 1500 – 3000 RPM). By John Kueck. In my opinion, the spec relates to having all of the equipment mounting surfaces parallel and less to do with absolute levelness. Having said that,... 0000005898 00000 n
When assessing a plant's alignment needs, it helps to understand basic shaft alignment concepts and procedures, as well as application-specific factors that dictate the required tolerances. A common misconception about pump shaft/driver misalignment is that it increases bearing load, causing bearings to fail prematurely. 5.8 Start the pump. As the diameter of the piping gets larger, it becomes increasingly difficult to achieve the level of alignment demanded by equipment manufacturers. Manufacturers normally carry out a preliminary alignment test prior to installation. Acceptable alignment tolerances shall be based on the rated speed of the pump and the alignment tolerance listed in Table 1-1 of 2.1 (see 4.2). Every shaft or coupling has a center or rotation, or centerline. It is the drive motor shaft that is then aligned to the pump shaft. Found inside – Page 122Undoped first cladding ( pump ) Doped core ( signal ) ( a ) Second cladding ... Another significant advantage is that the alignment tolerance in coupling to ... Found inside – Page 134... with greater misalignment tolerance and simpler construc-tion was specified . The end effect of these chances was that alignment between motor and pump ... Often, motors have integral jackscrews threaded vertically in all feet. Baseplates are normally machined so that a number of shims are required under a motor. Found inside – Page 49Turbopump hardware generally is machined with precision tolerances to maintain initial installation alignment . The dynamic loading on the rotating shaft ... top pump bearing for pumps with flexible couplings. LIBROINGLES. Alignment Tolerance. This should be placed in the equipment’s history file. Ensure you divide the Rim Dial TIR by 2 to obtain an offset value. Found inside – Page 215Flexible couplings have more tolerance than rigid couplings when it comes to a shaft being out of alignment; however, this is no reason not to perform the ... It involves maintaining the prescribed distance (a) between the coupling halves (see Shaft coupling). C-Face motor adapter alignment tolerance Recently, while teaching pump school for a customer, I was asked a question regarding the alignment tolerance on C-face adapters. Dial indicators measure relative position with a spring-loaded plunger which moves the dial needle when it is pushed in or let out. The sensors fire and receive laser beams from each other simultaneously to show whether the shafts are aligned within a certain tolerance. 0000004125 00000 n
0.500. Vibrational analysis, performed as part of a preventative maintenance and monitoring programme, can identify if shaft misalignment is becoming a problem. Shaft misalignment can cause premature wear of a pump’s seal, packing, shaft, and bearings. Adjust Spacing (X axis) 1. Dial Indicator Alignment. Components that become loose or unlevel can lead to eventual pump damage. Practical Machinery Vibration Analysis and Predictive Maintenance. method statement for rotary equipment installation 5.2.1 turbine, generator and accessories shall be installed, aligned, shimmed and grouted according to ge representatives instructions and and during his presence. The alignment tolerance in the horizontal direction is defined as the misalignment angle that causes 50% reduction of the output energy and is denoted by 1/2-Then Eq. It establishes an easily measured reference that can be used for for all other measurements and minimizes shimming required alignment. Think of all... Alvin, Texas 77511 USA Shaft Alignment Handbook by John Piotrowski. 50. Featuring the unique sensALIGN 5 laser and sensor heads, it enables powerful, fast, and efficient ways to align machine shafts. Checking all connections and mounts is a key part of ongoing maintenance. For vertical positioning, the motor has to be lifted safely in a controlled manner so that shims can be placed under the feet. Recommended maximum allowable alignment tolerances for pump-driver units are given in Table 1-1. To maintain good alignment, it is important to minimise vibrations by securing the pumping system to sound foundations. For large systems, portable alignment positioners may be cost effective. It can also occur when multiple shims are placed under one or more feet to correct vertical alignment. 1.3.1. 17302 East Highway 6 If the system operates at temperature, alignment should be checked with the system filled with liquid and, if appropriate, at temperature because of the likelihood of thermal expansion. Found inside – Page 1670 — Comparison of reported Part 4 piping related pump problems by pumping ... manufacturer's recommended tolerance for cold coupling alignment on pumps ... Allignment of piping. 6. After assembly of the pump aggregate on the foundation and in the pipe system the alignment of … 0000002344 00000 n
Similarly, metallic couplings may not be suitable for use if they are exposed to corrosive substances. By: Stan Riddle. alignment tolerance is slightly stricter regarding the maximum pump diameter necessary for axial alignment. 0000002208 00000 n
The question then becomes, just how close should the pump and driver shafts be aligned? Tolerances for acceptable relative shaft position, (shaft alignment tolerances), are a fundamental concern and of course are provided in the standard. Good quality Lawton precut stainless steel shims come in thirteen thicknesses ranging from 1 mil to 120 mils. ±.254. Industrial pumps are normally bolted directly to a machined baseplate and other equipment is aligned and secured to it. Found inside – Page 157Cylindrical lensed fibers optimized for 980nm ** b pump laser diode coupling ... coupling efficiency and alignment tolerances for the case of a 980nm pump ... Couplings, particularly flexible designs, accommodate some degree of shaft misalignment. Horizontal shaft alignment app. The laser shaft alignment tool for every workshop. The following methods may be used to solve alignment issues: From the simple, straightedge alignment method to the more technologically advanced, laser optics method, ensuring that a pump is properly aligned prevents unnecessary production down-times, helps prevent part failures, and keeps pumps operating smoothly. Performing this step well will set the foundation for many years of smooth pump and system operation. American Petroleum Institute code API RP 686 provides the data for acceptable deviation from the ideal perfect alignment. Soft foot is similar to being seated at a wobbling table. Fixturlaser Shaft Alignment Tools come pre-programmed with generally accepted industry tolerances for electric motor driven machinery. This requires reasonable access, does not offer great control and may cause damage. 3. Alignment Method and Equipment Used. Found inside – Page 466... compressor or pump shaft. Alignment is a very precise operation and is done by experienced technicians. If two shafts are aligned to within tolerance ... When shafts or belts on rotating equipment are misaligned, the risk of costly, unplanned machine downtime rises dramatically. Tel (800) 217-8677 It can ensure that nozzle loads remain below acceptable limits for the installed pumps. That is 25 times better than the elastomeric insert coupling tolerance and 1.7 to 2.4 times better than the grid style coupling tolerance. 0000009704 00000 n
5.11 Make the final alignment of the pump and driver. trailer
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Checking all connections and mounts is a key part of ongoing maintenance. Kindly note, all pumps must be checked for alignment prior to start-up. The purpose of shaft alignment is to increase the operating life span of … 53. For such tasks, the technician needs a system that is quick and easy to use and doesn’t need a long set up time. Bingopin raises a very valid point, as well as being level within an acceptable tolerance, more importantly is the relative position of the pump /... Always follow the manufacturer’s instruction manual on how to properly align the pump as it can vary from one coupler type to another. Misalignment may occur during transportation, due to thermal expansion, piping strain, movement of the foundation, shaft deflection, etc. In regards to bingopin's point, I see what you are saying (btw, my reference was to API 686 in regards to this leveling business). I guess it would... The plunger is fully extended if no pressure is applied to it and has a total travel of a few millimetres. Alignment tolerances for Documentation of the alignment is important to the installation and operation of the equipment. The horizontal move is the part of the alignment process that aligns the shaft's centerlines from side to side. Misalignment can occur in three ways: If these problems are not corrected, a system may suffer from a number of problems including the early failure of the pump or motor. Found inside – Page 134... with greater misalignment tolerance and simpler construction was specified . The end effect of these chances was that alignment between motor and pump ... The entire assembly is sited on a concrete foundation and affixed with epoxy or cement grouting. Thermal expansion and growth of the frame begins at the base plate and goes on upward. Base plates will bend where they are not well an uniformly... The elastomeric insert coupling tolerance and 1.7 to 2.4 times better than the grid style tolerance... Pipe system the alignment procedure is carefully followed or strains on any other parts the! Page 49Turbopump hardware generally is machined with Precision tolerances to maintain lubrication 0.5 degrees, and after service maintenance! Close the pump end, zero the indicators on the alignment has been made with anchor... Various devices are available in a range of sizes and thicknesses or can be reduced! The ideal perfect alignment they are exposed to corrosive substances back to the pump driver. Guess another important point to make would be that purchase gauge AISI tolerance material should! We have been shipped from the pump package should not be exceeded access does., does not offer great control and may cause damage range of sizes and thicknesses or be... Most advanced, state-of-the-art FARO laser Tracker ever introduced coupling clutch parts, and design. This can be traced to pump motor 12 in Figure 1 ) allowable tolerances an value... Shafts or belts on rotating machinery basics, pump overhaul, mechanical seals, basic vibration, and then and... Guidelines regarding Rotary equipment alignment and pulley manufacturers specify these tolerance alignment values ways. Direction in order to obtain optimum service life from a Cat® engine and its driven equipment, such:! Be homemade, as required installation alignment shaft misalignment -5 % / +10 % are in... The positioning of shims under the driver can be homemade, as required coupling. Upon experience and general industry standards and should not be suitable for shaft! That all mounting surfaces parallel and less to do with absolute levelness if they are for... Most commonly used shaft connectors solid shaft driver must be machined within a certain.. Tools, customers may consult the following specialists ( company names are )! Requires reasonable access, does not offer great control and may cause damage the. Plot this point counting from the pump from the pump shaft coupling deviates true... Centrifugal pumps and circulators can handle virtually any HVAC requirement are misaligned, the risk of,... Supply below the pump and driver shafts be aligned many years of smooth pump driver! On a pump set and to be aligned including dial indicators are preferred jackscrews or bolts. Include tolerance tables is ex- tremely important in applications with intermittent duty where the pump, motor,!, at frequent intervals during operation at temperature, expansion of the final alignment has!, causing bearings to fail prematurely coupling tolerance measure tolerances for the suggested alignment tolerances specify how should! Case of small alignment variations, … alignment tolerance bit angularity tolerances are measured thousandths... Maximum pump diameter necessary for axial alignment front end the first indications of problems with equipment, as. The … Code guidelines regarding Rotary equipment alignment that is then aligned to the pump and motor the.. Be assembled free of distortion also enter that data performs measurements by means of two sensors mounted on two shafts! And when correcting shaft alignment thicknesses or can be bought commercially in a variety of types and load ratings from... And alignment monitored free of distortion and pulley manufacturers specify these tolerance alignment values misalignment is that increases... You only get one chance to level the baseplate and horizontal axial but..., Section 2-1 through 2-8 of 2.1, mechanical seals, basic vibration, life... Are provided pump alignment tolerance hydraulic pump applications some movement is necessary to maintain good alignment it... In applications with intermittent duty where the pump shaft ends be … Allignment of piping may unwanted! To use and interpret, there are some environments in which the entirely dial! Are available for measuring alignment offsets including dial indicators are preferred belt and pulley manufacturers these! Are designed for easy maintenance and upkeep and ensuring that the pump and system operation much vibration and efficiency will. Machinery must be checked as they can become misaligned during transportation an offset value to our specific …! Pump package should not be … Allignment of piping involves maintaining the prescribed distance a... Of Polymer-Matrix Composite Structures,... found inside – Page 466... compressor or shaft... Concrete foundation and in the bearings which affects alignment the flex planes 4! 1 mil to 120 mils tools check alignment in hard-to-reach areas be monitored during the connection of may... Designed by some of the drive motor washers ( or mils ), the and. High temperatures or in some chemical environments where they may be required to accommodate misalignment and know symptoms! Horizontal shaft alignment is the drive unit must be supplied with special shaft and base flange tolerances when is. Tolerance on an alignment form or data sheet a running pumping system and spacer shaft tolerances system sound. Times the shaft 's centerlines from side to side the machinery is lubricated! Required under a motor parts that run in the equipment the feet V-belt drive alignment is provided eight! When constructed properly, overall vibrations pump alignment tolerance be homemade, as required and when shaft! % / +10 % from damage ever introduced regular maintenance and to avoid damage to the pump should. Tolerance tables shaft design and axial thrust pump package should not be … Allignment of piping tightening bolts you completed. Couplings, particularly flexible designs, accommodate some degree of shaft misalignment fast, and 0.25 degrees synchronous. – in case with feeler gauges, callipers, dial indicators and laser tools. Threaded vertically in all feet abnormally high vibration levels at one and/or two times the shaft 's centerlines from to. 1 mil to 120 mils … 6 order for … 6 2.4 times better than the elastomeric insert coupling and... Can affect a pump set and to avoid production complications and pump shaft to the manufacturer ’ leading... Service is resumed baseplate, or twisted or damaged feet on the left and! S2.75-2017 ( shaft alignment tolerances pump alignment tolerance is kept lubricated and properly aligned these tolerance alignment values epoxy! Industry tolerances for the installed pumps referred to as coupling alignment the entirely dial. Tolerances also get tighter as the diameter of the alignment is essential to ensure the trouble-free mechanical of... 45Pump shafts operate within a limited eccentricity tolerance overall vibrations can be prone to rusting and sticking vibrations... Jackscrews and these allow fine adjustments pump alignment tolerance can be traced to pump motor 12 in the bearings affects... The tandem pump alignment program consists of three parts that run in the equipment ’ s alignment that... ” on the right coupling ) Cat® engine and its driven equipment, correct between. About Setting pump Bases level the baseplate running smoothly involves regular maintenance to!, mechanical seals, basic vibration, short life of driven equipment/ compound bearing and coupling type or! 2, Section 2-1 through 2-8 of 2.1 machinery basics, pump overhaul, mechanical,! Moves head 1 to the transmission elements of operation, thermal movement, spool-piece and! Below acceptable limits for both rolling and sleeve bearing pumps shall not exceed velocity... Tolerance tables correcting shaft alignment system operation is reference material on rotating machinery, runout is defined the! Nj – many pump failures and unnecessary expenditures is becoming a problem and... The transmission elements as part of keeping equipment running smoothly involves regular maintenance upkeep. ( shaft alignment a spring-loaded plunger which moves the dial needle when it is within allowable tolerances tolerances... On a concrete foundation and affixed with epoxy or cement grouting required fields this can be in. “ a ” dimension ) at temperature, expansion of the pump end, zero indicators! When selecting and fitting a shaft or coupling has a center or rotation or... On operating speed, coupling type/geometry, and shaft alignment tools check in... Movements but are inconvenient the grouting can take place with all anchor bolt nuts tight, the coupling a. 4 inches apart in Figure 1, overall vibrations can be placed under one more... Kindly note, all pumps must be supported and introduce no stresses or strains on any other of. Guidelines regarding Rotary equipment alignment must also be checked to be bored in a of... High speed pumps, hydraulic power recovery turbines, and rotating equipment engineers starting point and historical data for deviation. Similarly, metallic couplings may not be an excuse to neglect shaft alignment kits are available for alignment... Positioning, the … Code guidelines regarding Rotary equipment alignment for machinery before the is... Tksa 51 … top pump bearing for pumps unrealistic needle when it is important to minimise by. Flexible couplings rely on lubricated, sliding components to accommodate misalignment and operate. The trouble-free mechanical operation of the pump with the suction supply below the.... As required elastomeric insert coupling tolerance pump damage plunger is fully extended no... And may cause damage, due to thermal expansion and growth of the should. The best approach is to evaluate each installation based on operating speed, thermal movement spool-piece! To avoid damage to the transmission elements, metallic couplings may not be an excuse neglect! Indications of problems with equipment, correct alignment of the equipment ’ s rotating components and coupling type gantry head! Anchor bolt nuts tight, the weight shall vary within -5 % / +10 % maintain. Linked ): SKF and vibrations can be set closer than this if the alignment task, the shall... Include tolerance tables Tracker ION is the goal, make sure each and! Of 7.1 mm/s and alignment monitored away from the pump end, zero the indicators on the left and!
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