Kohler 15REOZK, 60REOZK, 20REOZK-C, 30REOZK4, 40REOZK4, 48REOZK4, 80REOZJ4, 150REOZJ4 Industrial Generator Sets Wiring Diagrams (tp6924)

These Kohler industrial generator sets usually sit in plant rooms, hospitals, or outdoor enclosures, picking up the load when utility power drops. This wiring-diagram manual is what I reach for when I need to trace circuits, confirm connector pinouts, and verify harness work on these specific REOZK/REOZJ4 units. If, for example, the set won’t start from the remote panel after a control-box repair, this is what I use to follow the signal from the switch, through each connector, right to the controller.

Applications & Use Cases

• Track wire routing between the generator, control panel, sensors, and remote interfaces after a harness replacement.
• Isolate a no-crank or no-start condition by continuity-testing the start/stop and safety-shutdown circuits.
• Verify correct connector logic when installing a new controller or retrofitting monitoring equipment.
• Confirm proper grounding and shielding paths to chase down nuisance trips or erratic sensor readings.
• Check terminal IDs before crimping, splicing, or sealing repaired sections of loom.

FAQ

Q: Can I use this on a tablet at the set?

A: Yes, it’s handy zoomed in on a tablet so you can read pin labels right at the control box.

Q: Is it worth printing parts of it?

A: Many techs print the diagrams they use most and laminate them for quick reference in the generator room.

Safety Note

Always lock out all power sources and verify zero voltage before opening panels or testing any wiring.

Kohler 15REOZK, 60REOZK, 20REOZK-C, 30REOZK4, 40REOZK4, 48REOZK4, 80REOZJ4, 150REOZJ4 Industrial Generator Sets Index:

Wiring Diagram Cross-Reference Chart
Generator
Set Model
Number Hz
Generator Set
Spec Number
Wiring
Diagram
Group
Number
15REOZK 60 GM89099-GA1
20REOZK 60 GM87379-GA1 1
30REOZK 60 GM91476-GA1
40REOZK 60
GM91435-GA1 2
GM98968-GA1 3
50REOZK 60
GM91435-GA2 2
GM98968-GA2 3
60REOZK 60
GM91435-GA3 2
GM98968-GA3 3
20REOZK-C 60 GM102740-SA1, -SA2 4
30REOZK4 60 GM90409-GA1
5
40REOZK4 60 GM90408-GA1
48REOZK4 60 GM97345-GA1 6
80REOZJ4 60
GM99314-GA1 7
GM103586-GA1 8
100REOZJ4 60
GM99314-GA2 7
GM103586-GA2 8
125REOZJ4 60
GM94803-GA2 9
GM103587-GA1 10
150REOZJ4 60
GM94803-GA1 9
GM103587-GA2 10

Kohler