Kohler — Static Models (RY) — Reassembly
Repair & overhaul · Generator
From a Kohler service manual covering: 10RMOY, 15RMOY, 15RMY, 15ROY, 17.5ROY, 22.5ROZ, 22.5RZ, 24ROZ, 32.5ROZ, 32.5RZ, 47.5ROZ. Check it applies to your exact model before use.
Applies to: Kohler 15RMY, Kohler 15ROY, Kohler 17.5ROY, Kohler 22.5ROZ, Kohler 22.5RZ, Kohler 24ROZ, Kohler 32.5ROZ, Kohler 32.5RZ, Kohler 47.5ROZ
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 coat with copper-graphite or anti-seize compound.
- Lift rotor assembly onto taper and replace thru bolt; torque thru bolt to 50 ft. lbs. (6.92 Kgm).
- Slide stator into position, aligning stator mounting with holes in frame.
- Replace tolerance ring in end bracket with a new one.
- Position end bracket on stator and 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; remove wood blocks and return generator to normal position.
- Replace vibro-mount bolts and equipment ground strap.
- Replace base tray and feed stator, brush and speed sensor leads through grommets.
- Remount speed sensor; turn rotor so sensing lobe is directly below sensor; 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.
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 →, Kohler 15ROY →, Kohler 17.5ROY →, Kohler 22.5ROZ →, Kohler 22.5RZ →, Kohler 24ROZ →, Kohler 32.5ROZ →, Kohler 32.5RZ →, Kohler 47.5ROZ →
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.