Kohler — Generator Reassembly - Static Models (RY)
Repair & overhaul
From a Kohler service manual covering: 10/15RMOY, 15/17.5ROY, 15RMY, 22.5-47.5ROZ, 22.5/32.5RZ. Check it applies to your exact model before use.
Applies to: Kohler 15RMY
Before you start
- If brush retainer wire is not removed, voltage regulator will be damaged when generator is started.
- Improper brush-to-slip ring alignment may contribute to exciter voltage regulator failure and excessive ring wear.
Procedure
- Clean stub shaft taper and paint with copper-graphite or other anti-sieze compound.
- Lift rotor assembly onto taper and replace thru bolt. Torque thru bolt to 50 ft. lbs. (6.92 Kgm).
- Slide stator into position making sure stator mounting lines up with holes in frame.
- Replace tolerance ring in end bracket with a new one (replace every time end bracket is removed).
- Position end bracket on stator; bump snugly with a rubber mallet. Replace hardened washers and four long overbolts. Torque overbolts to 260 in. lbs. (2.99 Kgm).
- Cradle stator with lifting straps and raise with hoist. Remove wood block(s) and return generator to normal position. Replace vibro-mount bolts and equipment ground strap.
- Replace base tray. Feed stator leads up through large grommet; brush and speed sensor leads through small grommet.
- Remount speed sensor. Turn rotor to position sensing lobe directly below speed sensor. Use a feeler gauge to set air gap to 0.020 in. (0.508 mm).
- Remove retainer wire from brush holder allowing brushes to contact slip rings.
- Replace end panel and enclosure side panels.
- Complete reassembly by reversing the controller removal procedure and refer to the appropriate wiring diagram in Section 5.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Thru bolt torque 50 ft. lbs. (6.92 Kgm)
- Overbolt torque 260 in. lbs. (2.99 Kgm)
- Speed sensor air gap 0.020 in. (0.508 mm)
Full service-parts list: Kohler 15RMY →
Source: Kohler 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.