Kohler 30-125RZG, 50RZGB Fast-Response2 Industrial Generator Sets Wiring Diagrams (tp6098)

These Kohler Fast-Response2 industrial generator sets usually sit in plants, hospitals, or data centers, kicking in when the main power drops. This wiring diagram set is what I’d keep on the cart any time I’m chasing control issues or cleaning up someone else’s harness work. It lets you trace every circuit from the generator end to the control cabinet so you can confirm you’ve got the right wire in the right cavity before you ever power up. For example, if the set won’t transfer or start after a controller swap, this is what I’d use to verify each connector pin and prove continuity through the harness.

Applications & Use Cases

• Trace wire routing from sensors, relays, and breakers back to the control panel after damage or modifications.
• Isolate faults when you’re blowing fuses or losing a signal, by matching wire colors, IDs, and connector locations.
• Verify harness repairs after splicing or replacing sections, using the diagrams as a continuity-testing roadmap.
• Check connector logic before retrofitting controls or adding monitoring devices, so signals land on the correct pins.
• Plan clean routing for replacement looms to avoid chafing, heat, and electrical interference.

FAQ

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

A: Yes, it works well digitally; you can zoom in on connector callouts and follow circuits without carrying a stack of paper.

Q: Is it worth printing parts of it?

A: I’d print the diagrams you use most, slip them in plastic sleeves, and mark test points or repaired circuits with a pen.

Safety Note

Always lock out the generator and verify zero voltage before probing any wiring or opening connectors.

Kohler 30-125RZG, 50RZGB Fast-Response2 Industrial Generator Sets Index:

Wiring Diagram Cross-Reference
Generator Set
Model No. Hz
Generator Set
Spec No.
Wiring Diagram
Version No.
30RZG 50/60 GM13685-GA1, 4, 7, 10 1-1 or 1-2
30RZG 50/60 GM22383-GA1, 7, 10 1-3
35RZG 50/60 GM13685-GA2, 5, 8, 11 1-1 or 1-2
35RZG 50/60 GM22383-GA2, 8, 11 1-3
45RZG 50/60 GM13685-GA3, 6, 9, 12 1-1 or 1-2
45RZG 50/60 GM22383-GA3, 9, 12 1-3
50RZG 50/60 GM13686-GA1, 3, 5, 7 1-1 or 1-2
50RZGB 50/60 GM21302-GA1, 5, 7 4-1
60RZG 50/60 GM13686-GA2, 4, 6, 8 1-1 or 1-2
60RZG 50/60 GM21302-GA2, 6, 8 1-3
80RZG 50/60 GM13934-GA1, 2, 3, 4 2-1 or 2-2
100RZG 50/60 GM13934-GA5, 6, 7, 8 2-1 or 2-2
125RZG 50/60 GM20568-GA1, 2, 3, 4 3-1

Kohler