Kohler 350-500REOZJ, 350-500REOZJB Industrial Generator Sets Wiring Diagrams (tp6797)

These Kohler 350–500REOZJ/REOZJB industrial generator sets usually sit in plant rooms, hospitals, data centers, or outdoor enclosures, backing up critical loads when the grid drops. This wiring-diagram manual is what I grab when I need to trace circuits, figure out connector logic, or confirm a harness repair before we ever hit the start button. If, for example, the set won’t take a start signal from the transfer switch, I use this to follow the control wiring from the terminals, through each connector, to the controller and safety devices.

Applications & Use Cases

• Trace control and sensing wires to isolate a no-start or no-crank condition.
• Verify correct wire routing and pin locations after replacing or extending a harness.
• Continuity-test safety and shutdown circuits to confirm they’re wired in the right sequence.
• Identify connector IDs and color codes so you don’t cross leads during retrofits.
• Plan clean add-ons (remote start, monitoring) without overloading or bypassing critical circuits.

FAQ

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

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

Q: Is it worth printing parts of it?

A: I usually print the key diagrams I’m using that day and mark test points and readings directly on them.

Safety Note

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

Kohler 350-500REOZJ, 350-500REOZJB Industrial Generator Sets Index:

• Front Cover
• ProductIdentificationInformation
• Introduction/ServiceAssistance
• WiringDiagramReferenceCharts
• Controller Identification
• ADV-5875
• ADV-7999
• ADV-8000
• ADV-8001
• ADV-8493
• ADV-8749
• ADV-9078
• GM72449
• GM77987
• GM77988
• GM77989
• GM78246
• GM78247
• GM94439
• GM105806
• Back Cover

Kohler