Nidec LSA 49.1 Installation And Maintenance Manual

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Nidec LSA 49.1 Installation And Maintenance Manual Manual pdf 15 page image

2017.12 / p15Electric Power GenerationInstallation and maintenanceLSA 49.1Low Voltage Alternators - 4 pole3007 en -4.6 - Dismantling, reassemblyDuring the warranty period, thisoperation should only be carried out inan approved workshop or in our factory,otherwise the warrantymay be invalidated.Whilst being handled, the machineshould remain horizontal (rotor notlocked in position). Check how much themachine weighs before choosing thelifting method.• Tools requiredTo fully dismantle the machine, werecommend using the tools listed below:- 1 ratchet spanner + extension- 1 torque wrench- 1 set of flat spanners: 8 mm, 10 mm, 18 mm- 1 socket set: 8, 10, 13, 16, 18, 21, 24, 30 mm- 1 puller (U35) / (U32/350)• Screw tightening torqueSee section 5.4.• Access to diodes- Open the air intake grille (51).- Disconnect the diodes.- Disconnect the diodes using an ohmmeteror a battery lamp.- Remove the surge suppressor (347).- Remove the 6 “H” mounting nuts for thediode bridges on the support.- Change the fitted caps, respecting thepolarity.• Access to connections and theregulation systemAccess directly by removing the box lid (48)or the AVR access door (466).• Replacing the NDE bearing onalternators connected to a diesel engine- Remove the lid of the protective cover (48)and the AVR inspection door (466).- Disconnect the AVR.- Take off the panels (367 and 368) and thegrilles (254 and 255).- Disconnect the stator connections (T1 toT12).- Remove the neutral link (278).- Take out the connector link assembly (281+ 279).- Take out the connection plate assembly(281 + 270).- Remove the rear cross-member (269) andthe rear panel (365).- Remove the air intake grille (51).- Remove the 4 bearing thrust screws (78).- Remove all 4 screws (37).- Take out the bearing (36).- Remove the ball bearing (70) using a pullerwith a central screw (see fig. below).- Check the state of the “O” ring (349) and, ifnecessary, change it.- Fit the new bearing, after heating it byinduction at approximately 80°C.WARNINGReplace the dismantled bearing with anew one.WARNING