Leroy-Somer — Reassembly PLS 315 motors
Repair & overhaul · Motor assembly
From a Leroy-Somer service manual — check it applies to your exact model before use.
Before you start
- MAKE SURE the fan is facing the right way
Procedure
- See section 6.1 before reassembly
- Insert inner retainers (33) and (53) with preloading springs (59) and a little grease
- Fit the new bearings (30 and 50) on the shaft
- Insert rotor (3) into stator (1) taking every precaution not to knock the winding
- Use rods to maintain grease nipple position; check preloading springs are properly installed
- Mount NDE shield (6) then mount mobile valve (56) with seal (54) and support (388)
- Mount outer NDE bearing retainer (52) with screws (62), grease drain hole at the bottom
- Mount DE shield (5) then mount mobile valve (35) with seal (39) and support (386)
- Mount shield seals with grease: (54) NDE, (39) DE
- Mount outer DE bearing retainer (32) with screws (40), grease drain hole at the bottom
- Place tie rods (14) and protective cover feet (380), tighten nuts diagonally
- Install fan key and mount fan (7) facing the right way
- Check free rotation, replace cover (13), grease nipple (64) and extension (65)
- Fill new grease per table, tighten nuts diagonally to torque, replace key (21)
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Tighten tie rods diagonally to recommended torque (section 6.1)
Source: Leroy-Somer service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.