MN01041
Contents
1. Smith Meter Rotary Vane Meters T IVIC Technologies PRIME 4 Service Issue Rev 0 4 7 11 Bulletin MN01041 Contents Trouble Shooting uuuuuuuu uu uu uuu E aaaskuawsasusliawsaquawkiqkipasamayakiqawanhawaklkusqawakipun hasa EE aeae Page 2 Genuine Smith Meter Parts a aaa aaa aasaass r rraasssssrrsssssssrrssssssrrrssssssisssa Page 2 Special Tools and Fixtures aa aras rarsssssrrsssssssrrsssssssssssssa Page 2 Disassembly and Inspection ar rssssrsssssssssssssssssssssssssss Page 3 neassembly uuu uu l u lu EEEE aE AAAA ANE REEERE aE ENE RRT ENA Page 5 Se vice RECOIOS uuu u u a E ee E E ae eee ree Page 7 The Most Trusted Name In Measurement General To insure the best performance of the PRIME Meter the step by step procedures outlined in this manual should be followed Review the entire manual prior to disas sembly or repair of the meter to fully understand the requirements Trouble Shooting No Pulses Generated Preset Configuration Check that the AccuLoad electronic preset counter is configured for contact input No Power Check to see if there is power at the sensor To do this put the common lead of a voltmeter on the terminal to which the black wire of the sensor is connected Measure the voltage on the red wire of the sensor If2. Measurement Minimum Maximum otor Axial End Play Rotor End Faces 0 0015 0 0065 vs Housing Bosses Remove Meter from Line Drain the meter thoroughly prior to disconnecting the J box wiring The 1 4 NPT pipe plug on the meter cover is used to drain the meter Depending upon the system piping draining may take several minutes To lift the meter use the eyebolt threaded into the boss on the housing vertical installation or the hole in the gusset horizontal installation It is possible to examine the internals of the meter while it is installed in the line as mentioned in the Trouble Shooting section This is done by removing the pulse sensor housing from the cover then removing the cover from the meter However service is not recommended without the complete removal of the meter from the line This is because it is difficult to test spin the rotor WARNING Do not remove the sensor housing from the meter without first draining the meter See warning tag on the sensor housing Remove Pulse Sensor and Sensor Housing The pulse sensor is located in the sensor housing and can be replaced without the need of draining the meter and removing it from the line This is accomplished by disconnecting all wiring connections be sure and mark the wire locations and disconnecting the union or unscrewing the conduit box from the sensor housing Figure 2 Figure 2 Issue Rev 0 4 7 11 Remove the hex socket head pipe
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4. drain in the cover Use thread locking compound Part Number 643917 4 01 on two socket head screws and tighten to 48 5 in lbs torque Install the drain plug into the cover Issue Rev 0 4 7 11 Start Up Procedures Install Meter Into Line When the meter is first installed in the line there is air inside the rotor The air takes some time to work out If the meter is subjected to hydraulic shock during this vulnerable time the rotor can pinch down on the blades and cause blade breakage or cam shaft rotation By fol lowing the specified start up procedure the likelihood of meter damage will be greatly reduced Note Refer to PRIME 4 Installation Operation Manual Publication No MN01038 for Start Up Procedures Service Records It is a good idea to keep records of all proving data on each meter Significant shifts in accuracy between proving is normally an indicator that the meter requires service Maintaining service records on the meter is also a good idea and may aid in trouble shooting future problems The following Meter Clearance Record and Meter Proving Record forms are supplied for maintaining accurate service records MN01041 e Page 7 Eld puq eIxy 10 0H yoojg O 10 0H Wed 1340 SJ MO0 04 WED pelg BuisnorH O d L opel Keld pug pelq 1O S Speld pajquiessy sy punoj sy pud elxXyv 10 0H yoojg O JO1OY Wed JOAO SI AXO Od Wed
5. may have been changed and are no longer in effect Contact information is subject to change For the most current contact information visit our website at www fmctechnologies com measurementsolutions and click on the Contact Us link in the left hand column Headquarters 500 North Sam Houston Parkway West Suite 100 Houston TX 77067 USA Phone 1 281 260 2190 Fax 1 281 260 2191 Measurement Products and Equipment Integrated Measurement Systems Erie PA USA 1 814 898 5000 Dubai United Arab Emirates 971 4 883 0303 Corpus Christi TX USA 1 361 289 3400 Ellerbek Germany 49 4101 3040 Los Angeles CA USA 1 310 328 1236 Kongsberg Norway 47 32 286700 Barcelona Spain 34 93 201 0989 Melbourne Australia 61 3 9807 2818 Dubai United Arab Emirates 971 4 883 0303 Beijing China 86 10 6500 2251 Moscow Russia 7 495 5648705 Buenos Aires Argentina 54 11 4812 4736 Singapore 65 6861 3011 Burnham England 44 1628 603205 Visit our website at www fmctechnologies com measurementsolutions Printed in U S A 7 11 FMC Technologies Measurement Solutions Inc All rights reserved MN01041 Issue Rev 0 4 7 11
6. plug and retainer ring The socket head pipe plug can be found under the warn ing tag located on the sensor housing Figures 3 and 4 Caution The sensor is magnetized and can attract small pieces of metal at the tip Be certain the sensor tip and sensor housing are absolutely clean prior to reinstalling the sensor The slightest bit of debris can increase the distance between the sensor and the pulse target gear inside the meter and prevent the sensor from producing pulses Figure 3 Figure 4 Pull the sensor out by the wires Figure 5 Figure 5 WARNING Do not proceed with following steps unless meter has been blocked depressurized and drained of product MN01041 Page 3 Figure 6 Lift the cover and rotate slightly to separate it from the shaft Figure 9 Lay the cover so that the inside faces upward Remove the O ring Loosen Shaft Before the rotor can be removed it is necessary to loosen the shaft from the socket in the meter body This is done by loosening the shaft locking nut until it is flush with the end of the threaded rod Give the nut a sharp blow with a soft hammer This will free the locking cone at the other end of the shaft Figure 10 Figure 7 To remove the sensor housing remove the two socket head screws A ball end hexagonal wrench works best Remove the o ring Figures 6 and 7 Note When reinstalling the sensor housing be sure to install the o ring and the socket hea
7. 7 4 01 on rotor cover screws and evenly tighten to 48 5 in lbs torque Figure 16 Figure 16 Replace Rotor Cover MN01041 Page 5 The shaft should rotate freely moving the blades in and out of the rotor Assemble Rotor to Body Install the cone and shaft locking key into the shaft socket in the meter body Figure 17 wah A Figure 17 Cone and Shaft Locking Key in Shaft Socket Rotate the shaft so that both blades are fully extended Lift the rotor assembly and place it into the body so that the extended blades are opposite the block Figure 18 Figure 18 Place Rotor into Body The shaft should slide easily into the socket Check that the shaft is fully engaged in the socket and will not rotate It should be possible to rotate the rotor Thread the tie rod into the cone at least eight 8 turns Place the washer and nut on the tie rod but do not tighten Figure 19 a k Figure 19 Thread Tie Rod into the Cone Blade Tip Clearances Position the spider over the shaft and onto the body The spider centers the shaft so that proper measurements can be taken If the blades are being replaced it may be necessary to slightly file them to obtain the proper tip clearances Use feeler gages to check each blade tip when it is extended into the measuring chamber It is necessary to push the blade against the small radius of the cam in order to properly measure this clearance Figure 20 Use cha
8. d pipe plug Be sure that the housing is installed with the socket head pipe plug facing out Figure 9 Remove Cover Figure 10 Loosening Locking Cone Remove Rotor Carefully lift the rotor shaft and blades from the meter body If the shaft does not come free it may be neces sary to jar it loose with the momentum of the rotor Once removed from the meter body set the rotor assembly on the platform with a 7 1 2 diameter hole rotor cover end up Disassemble Rotor Remove the eight 8 socket head screws Figure 11 Use four 4 of the screws as jack screws to evenly lift the rotor cover from the rotor Even though the dowel pins allow for proper orientation of the rotor cover a chock mark across the rotor and rotor cover will soeed the orientation during reassemble Figure 11 Remove Rotor Cover With the cover removed use a three cornered file to file one notch in the outer blade and rotor slot Figure 12 On reassembly it is important that the blades be positioned the same way in their original slot Remove the outer blade Page 4 MN01041 Figure 12 Notch Out Blade and Rotor Slot Lift the shaft and cam assemble out of the rotor Notch the inner blade and rotor slot with two notches and remove Inspect the rotor for hairline cracks particularly the slot bridges on the end opposite of the cover Pressing off the Cam Press the shaft out of the cam using an arbor press Note the step on
9. e blade in and out of the rotor If there is a noticeable amount of free play more than 0 020 the blade is excessively worn and needs to be replaced see instructions below Page 2 MN0O1041 Genuine Smith Meter Parts The PRIME Meter is approved by several weights and measures authorities including NIST and CCA In order to maintain these approvals it is essential that all replacement parts are genuine Smith Meter Parts Special Tools and Fixtures In addition to ordinary hand tools the following tools and fixtures will be useful An assortment of leaf type Feeler Gauges soldered to a 15 extension rod WE Spider Part No 554109 0 01 to center the shaft during assembly and clearance verification l Ball end Allen Wrench 3 16 E Platform for the rotor assembly that is at least 1 5 thick and 10 in diameter or square with a 7 5 diam eter hole through The top surface should be smooth Figure 1 W Internal retaining ring pliers HM Two 0 375 16 NC X 1 5 long eyebolts for cover removal E Thread locking compound Part No 643917 4 01 for the rotor cover screws Figure 1 Platform Issue Rev 0 4 7 11 Disassembly and Inspection Caution Disconnect power 12 Vdc before working on the meter The following clearance table can be used to judge the degree of wear on various parts of the meter It is a good idea to measure and record the clearances as the meter is disassemble Clearance Table
10. itis not plus 12 or 24 Vdc 10 check the power supply Debris on Sensor Tip If pulse failure occurred right after having the sensor out of the housing look for debris at the tip of the sensor The sensor must be completely seated in the housing If it is just 0 020 away from seating no pulses will be generated Broken Blade Whenever the meter has been drained there is the danger of hydraulic shock breaking a blade during the subsequent start up If there is flow through the meter and it is not making a light tapping sound it may be necessary to place your ear on the meter to hear this sound there is probably a broken blade and the rotor is not rotating It will be necessary to drain the meter and remove the cover to inspect for a broken blade see instructions below If there is no broken blade and the rotor turns freely the lack of pulses is probably due to a faulty sensor Be sure to replace with the proper sensor Part No 646592 4 01 is for single pulse output 646596 4 01 is for dual pulse output Excessive Noise The PRIME Meter makes very little noise when op erating especially at flow rates under 750 gpm If the meter is making a noticeable rapid tapping sound the cam following sections of the blades may be worn It will be necessary to drain the meter and remove the cover to inspect for blade wear see instructions below With the cover removed rotate the rotor until one blade is horizontal Try to move th
11. lk to mark the areas of the blade tips that are to tight Figure 20 Measure Blade Tip Clearance Remove the rotor from the body and place on a smooth jawed vise clamping down lightly on the opposite paddle to the one that will be filed Coat the end of the paddle with bluing compound to aid in identifying the filing pattern Use care not to remove to much stock Figure 21 Figure 21 File Blade to Increase Blade Tip Clearance Repeat as necessary until all blade tip clearances are between 0 0025 and 0 0045 With the rotor in the body and the spider in place check that the blade ends are no higher than the rotor File down if necessary Page 6 MN01041 Tighten Shaft Locking Nut With the rotor in the body and the spider in place tighten the shaft locking nut on the end of the tie rod to 23 26 ft lbs torque Figure 22 Figure 22 Tighten Shaft Locking Nut Install O Ring and Cover Use petroleum jelly or grease to lubricate the cover O Ring and place in the grove on the body Locate the cover so that the drain hole will be at the bottom of the meter when installed in the line Evenly tighten the cover bolts using a criss cross pattern to 260 10 ft lbs torque Install Sensor Housing O ring and Pulse Sensor Use grease to lubricate the sensor housing O Ring and place on the sensor housing Install the sensor hous ing into the cover so that the notch in the threaded end of the sensor faces toward the
12. the shaft and that the shaft can only be pressed in one direction Figure 13 Before pressing off the cam place a washer under the cam so that the cam is not supported at the edges Inspection of Parts Prior to reassembly all parts should be inspected for ex cessive wear corrosion or damage Generally all parts that affect meter clearances e g blades rotor etc that show measurable wear patterns should be replaced Reassembly Shaft Assembly Before pressing on the cam place a washer under the cam so that the cam is not supported at the edges Place the key into the groove of the shaft and use an arbor press to press the shaft into the cam until it seats on the step Figure 14 Issue Rev 0 4 7 11 Figure 14 Press Shaft into Cam Assemble Rotor Place the rotor on the platform and install the inner blade shaft assembly and the outer blade If these are the original blades be sure they are located properly in their slots ac cording to the notches filed at disassembly Figure 15 It is essential that the contact surfaces between the rotor and rotor cover be absolutely clean The slightest amount of debris trapped here will result in an increase in the distance between the rotor bearing ends and may not allow the rotor to rotate freely once inside the meter Rotate the rotor cover so that the dowel pin in the rotor match the hole pattern in the cover Use thread locking compound Part No 64391
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