Installation Operation and Maintenance Manual

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TroubleshootingTroubleshootingOperation troubleshootingSymptom Cause RemedyThe pump is not deliveringliquid.The pump is not producingthe rated flow or head.The pump starts and thenstops pumping.The bearings are runninghot.The pump is noisy orvibrates.The pump is not primed.The suction line is clogged.The impeller is clogged.The shaft is rotating in the wrong direction.The foot valve or suction pipe opening is notsubmerged enough.The suction lift is too high.The vent line is not connected.The gasket or O-ring has an air leak.The stuffing box has an air leak.The impeller is partly clogged.The clearance between the impeller and thepump casing is excessive.The suction head is not sufficient.The impeller is worn or broken.The pump was not primed properly.The suction line has air or vapor pockets.The suction line has an air leak.The pump and driver are not aligned properly.The lubrication has not been applied properly.The lubrication is not cooled properly.The pump and driver are not aligned properly.The impeller is partly clogged.The impeller or shaft is broken or bent.The foundation is not rigid.The bearings are worn.The suction or discharge piping is not anchoredor properly supported.The pump is cavitating.Re-prime the pump and check that the pump andsuction line are full of liquid.Remove the obstructions.Back-flush the pump in order to clean the impeller.Change the rotation. The rotation must match thearrow on the bearing housing or pump casing.Consult an ITT representative for the propersubmersion depth. Use a baffle in order toeliminate vortices.Shorten the suction pipe.Connect the vent line to expel air.Replace the gasket or O-ring.Replace or readjust the packing or the mechanicalseal.Back-flush the pump in order to clean the impeller.Adjust the impeller clearance.Make sure that the suction-line shutoff valve isfully open and that the line is unobstructed.Inspect and replace the impeller if necessary.Re-prime the pump and check that the pump andsuction line are full of liquid.Rearrange the piping in order to eliminate airpockets.Repair the leak.Realign the pump and driver.Check the lubricant for suitability and level.Check the cooling system.Realign the pump and driver.Back-flush the pump to clean the impeller.Replace the impeller or shaft as necessary.Tighten the hold-down bolts of the pump andmotor or adjust the stilts.Replace the bearings.Anchor the suction or discharge piping asnecessary according to recommendations in theHydraulic Institute Standards Manual.Locate and correct the system problem.116 Model 3796 i-FRAME Installation, Operation, and Maintenance Manual
Symptom Cause RemedyThere is excessive leakage The packing gland is not adjusted properly. Tighten the gland nuts.from the stuffing box.The stuffing box is not packed properly. Check the packing and repack the box.The motor requiresexcessive power.The mechanical-seal parts are worn.The mechanical seal is overheating.The shaft sleeve is scored.The discharge head has dropped below therated point and is pumping too much liquid.The liquid is heavier than expected.The stuffing-box packing is too tight.Rotating parts are rubbing against each other.The impeller clearance is too tight.Replace the worn parts.Check the lubrication and cooling lines.Machine or replace the shaft sleeve as necessary.Install a throttle valve. If it does not help, then trimthe impeller diameter.If this does not help, then consult an ITTrepresentative.Check the specific gravity and viscosity.Readjust the packing. If the packing is worn, thenreplace the packing.Check the parts that are wearing for properclearances.Adjust the impeller clearance.Troubleshooting (Continued)Alignment troubleshootingSymptom Cause RemedyHorizontal (side-to-side) alignment cannotbe obtained (angular or parallel).The driver feet are bolt-bound.The baseplate is not leveled properly andis probably twisted.Assembly troubleshootingSymptom Cause RemedyThere is excessive shaft end play.The internal clearance of the bearingsexceeds the recommended amount.The snap ring is loose in the bearinghousinggroove.Loosen the pump's hold-down bolts, andslide the pump and driver until youachieve horizontal alignment.1. Determine which corners of thebaseplate are high or low.2. Remove or add shims at theappropriate corners.3. Realign the pump and driver.Replace the bearings with a bearing ofthe correct type.Re-seat the snap ring.There is excessive shaft and sleeve runout. The sleeve is worn. Replace the sleeve.There is excessive bearing-frame flangerunout.The shaft is bent.The shaft is bent.Replace the shaft.Replace the shaft.The flange of the bearing frame is distorted. Replace the bearing-frame flange.There is excessive frame-adapter runout. There is corrosion on the frame adapter. Replace the frame adapter.There is excessive seal chamber or stuffingboxcover runout.There is excessive vane-tip runout of theimpeller.The adapter-to-frame gasket is not seatedproperly.The seal chamber or the stuffing-box coveris not properly seated in the frame adapter.There is corrosion or wear on the sealchamber or stuffing-box cover.The vane is bent.Re-seat the frame adapter and makesure that the adapter-to-frame gasketis seated properly.Re-seat the seal chamber or stuffingboxcover.Replace the seal chamber or stuffingboxcover.Replace the impeller.Model 3796 i-FRAME Installation, Operation, and Maintenance Manual 117
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Goulds PumpsInstallation, Operation
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Table of ContentsImpeller-clearance
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Introduction and SafetyIntroduction
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Introduction and Safety (Continued)
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Transportation and Storage (Continu
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Product DescriptionProduct Descript
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Product Description (Continued)Cove
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Product Description (Continued)Tabl
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InstallationInstallationPreinstalla
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Installation (Continued)Piping chec
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Installation (Continued)Liquid sour
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Installation (Continued)Example: Di
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Installation (Continued)d) Make sur
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Installation (Continued)76152341. U
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Installation (Continued)Baseplate-l
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Installation (Continued)WhenPeriodi
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Installation (Continued)1. Set the
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Installation (Continued)C-face adap
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Commissioning, Startup, Operation,
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MaintenanceMaintenanceMaintenance s
Page 68 and 69: Maintenance (Continued)Regrease the
Page 70 and 71: Maintenance (Continued)Packed stuff
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Page 74 and 75: Maintenance (Continued)Clean surfac
Page 76 and 77: Maintenance (Continued)5. Remove th
Page 78 and 79: Maintenance (Continued)3. Remove th
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Page 84 and 85: Maintenance (Continued)2. Loosen th
Page 86 and 87: Maintenance (Continued)Surface insp
Page 88 and 89: Maintenance (Continued)444Figure 24
Page 90 and 91: Maintenance (Continued)Bearing fits
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Page 94 and 95: Maintenance (Continued)372T 113A 40
Page 96 and 97: Maintenance (Continued)a) Coat the
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Page 100 and 101: Maintenance (Continued)4. Check the
Page 102 and 103: Maintenance (Continued)333AINPRO la
Page 104 and 105: Maintenance (Continued)Seal the sha
Page 106 and 107: Maintenance (Continued)c) Install t
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Page 110 and 111: Maintenance (Continued).030101For m
Page 112 and 113: Maintenance (Continued)100351418100
Page 114 and 115: Maintenance (Continued)Table 18: Ma
Page 116 and 117: Maintenance (Continued)Table 22: Lu
Page 120 and 121: Troubleshooting (Continued)i-ALERT
Page 122 and 123: Parts Listings and Cross-Sectional
Page 132: Other Relevant Documentation or Man
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Installation Operation and Maintenance Manual

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