Nidec Leroy-Somer PLSES Series Installation & Maintenance

Also see for Leroy-Somer FLSES Series: Commissioning and maintenance guide

Nidec Leroy-Somer PLSES Series Installation & Maintenance Manual pdf 46 page image

46Installation and maintenance - Three-phase induction motors4850 en - 2018.11 / fPLS/PLSES MOTORS12 - PLS/PLSES MOTORS12.1 - PLS/PLSES 180 LG/LGU200 M/L/LP/LU/LR, 225 MR motors12.1.1 - Dismantling- Remove the screws (27) and grease nipple (64), then take offthe cover (13).- Pull out the fan (7) using a hub remover or 2 diametricallyopposed levers, using the shield (6) for support, then removethe fan key or pin.- Take out the key (21).- Unscrew the tie rods (14) then remove them.- Unscrew the DE bearing retainer (33) fixing screws (40) andNDE bearing retainer (53) fixing screws (62), and removethem.- Using a bronze drift, remove the shields (5 and 6) by tappinggently on the shield bosses. Recover the preloading washer(59).- Remove the circlip (38) and if necessary the circlip (60) (motorwith roller bearing).- Remove the rotor (3) from the stator (1) at the drive end,taking care not to touch the winding with the inner bearingretainer. Take out the bearings (30) and (50) using a bearingremover, while protecting the end of the shaft extension with awasher. Take care not to knock the running surfaces of theshaft.- The bearings are removed either separately or with thebearing retainers; to avoid damaging the bearing retainers,heat the inner bearing retainer to make it easier to dismantle(the bearing should be discarded).12.1.2 - Reassembly- See section 6.1 before reassembly.- Insert the inner bearing retainer (33) at the rotor drive end andthe inner bearing retainer (53) at the non drive end.- Fit the new bearings on the shaft, see section 6.1 on mountingbearings.- Insert the rotor (3) in the stator (1) taking every precaution notto knock the winding.- Screw a rod with the same thread diameter as the screws (40)and (62) into one of the tapped holes of the bearing retainers(33) and (53) to maintain the position of the grease nipple whenrefitting the shields (5 and 6).- Position the preloading washer (59) with a small amount ofgrease at the back of the bearing cage of the NDE shield (6),then remount the NDE shield (6) by positioning it on the stator.- Fit the shield (5) taking care to position the bearing retainer(33) correctly.- Place the tie rods (14) in position and tighten the nutsdiagonally up to the recommended torque (see section 6.1).- Fix the bearing retainers (33) and (53) with their own screws(40) and (62).- Mount the shield seals with grease: (54) for the non drive end,(39) for the drive end.- Install the fan key or pin.- Mount the fan (7) using a drift to bed it into position.MAKE SURE it is facing the right way!- Check that the rotor turns freely by hand (that there is no axialplay if there is a locked end shield).- Replace the cover (13) and fix it with the screws (27).- Replace the grease nipple (64).- Fill with new grease: the quantity is indicated in the tableopposite.Turn the shaft by hand during greasing.- Replace the key (21).PLS/PLSES 180 LG/LGU200 M/L/LP/LU/LRstandard bearingsNDE DE59 53 533 4066254 50 30 38 39PLS/PLSES 225 MRstandard bearingsNDE DE59 53 533 4066254 50 30 38 39PLS/PLSES 180 LG/LGU200 M/L/LP/LU/LR - 225 MRdrive end roller bearingsNDE DE53 533 4066254 5060 30 38 39Bearing g6212 Z 316214 606312 or NU312 906313 or NU313 936314 or NU314 140(Weight valid for POLYREX EM103 grease with immaculatelyclean grease track + bearing seat + drain holes).