Desmi H Series Operation And Maintenance Instructions

Contents

Desmi H Series Operation And Maintenance Instructions Manual pdf 7 page image

______________________________________________________________________________DESMI Pumping Technology A/S 7Tagholm 19400 Nørresundby – DenmarkTel: +45 96 32 81 11 Fax: +45 98 17 54 99E-mail: desmi@desmi.comwww.desmi.com5. DISMANTLING5.1 ACCESS TO IMPELLER AND SHAFT SEALRemove Allen screws (22), which hold the shaft seal cover to the pump casing, and pull thebearing housing to remove the complete bearing housing with impeller, bearings, and shaft.5.2 DISMANTLING SHAFT SEALRemove nut (6). Pull off the impeller. Remove Allen screws (19), which hold the bearinghousing to the shaft seal cover, pull shaft seal cover and bearing housing apart, by whichshaft seal and water deflector are pulled off the shaft.5.3 DISMANTLING SEATPress out the seat from behind the shaft seal cover.5.4 DISMANTLING SHAFT WITH BEARINGSBefore dismantling the shaft with bearings, remove the sunk key (16). The shaft can now bepulled out of the bearing housing allowing inspection of the bearings.5.5 INSPECTIONWhen the pump has been dismantled, check the following parts for wear and damage:- Sealing ring/impeller: Max. clearance 0.4-0.5 mm measured in radius.- Shaft seal/shaft seal cover: Check the seat for flatness and cracks.Check the rubber parts for elasticity.- Bearings: Replace in case of wear and noise.6. ASSEMBLING6.1 FITTING SEALING RING IN PUMP CASINGWhen fitted, the sealing ring is to bear against the shoulder of the pump casing.