Format: PDF (Printable Document)
File Language: English
File Pages: 60
File Size: 4.82 MB (Speed Download Link)
Brand: Kohler
Model: 20-500REOZT Industrial Generator Sets
Book No: tp6898
Type of Document: Wiring Diagrams
$ 40
These Kohler 20–500REOZT industrial generator sets usually sit in plant rooms, hospitals, or outdoor enclosures, kicking in when the main power drops. This wiring-diagram manual is what I’d grab to trace circuits, confirm connector logic, and make sure a harness repair or retrofit is actually correct before I re-energize the set. For example, if the generator won’t start after a control panel swap, this is what I’d use to follow the start circuit from the controller, through each plug, all the way to the engine interface.
Applications & Use Cases
FAQ
Q: Can I use this on a tablet at the set?
A: Yes, the diagrams are usable on a tablet; zooming in helps you read pin labels and follow wire numbers right at the machine.
Q: Is it worth printing parts of this?
A: Many techs print just the specific diagrams they need and mark them up with test results and harness notes in the field.
Safety Note
Always isolate generator power sources and verify zero energy before probing or disconnecting any wiring.
Wiring Diagram Cross-Reference
Generator Set
Model No. Hz
Generator Set
Spec No. Controller
20REOZT 60 GM86774-GA1
Decision-Makerr 1000
40REOZT 60 GM86774-GA2
60REOZT 60 GM86874-GA1
100REOZT 60 GM86874-GA1
125REOZT 60 GM63142-GA2
150REOZT 60 GM63142-GA3
200REOZT 60 GM63142-GA4
275REOZT 60 GM63144-GA1
500REOZT 60 GM63144-GA3 Decision-Makerr 4000
20–60REOZT Wiring Diagrams Reference
Controller Description 20REOZT Page 40REOZT Page 60REOZT Page
Decision-Makerr 1000 Controller
Wiring Diagram
Controller and card 31635–050801 7 31635–050801 7 31635–050801 7
Direct current bus 31635–051001 9 31635–051001 9 31635–051001 9
Power and reading 31635–053701 10 31635–054301 11 31635–054301 11
Measurement card 31635–055202 12 31635–055202 12 31635–055202 12
Predisposition automatic position 31635–056001 13 31635–056001 13 31635–056001 13
Retention fuel tank level 31635–067101 14 31635–067101 14 31635–067101 14
Voltage adjustment 31635–071001 15 31635–071001 15 31635–071001 15
Ground protection relay 31635–078002 16 31635–078002 16 31635–078002 16
Relay setting not applicable — 31635–218301 30 31635–218301 30
Grounding system 31635–228801 39 31635–230401 40 31635–230401 40
Power and sensing–wiring diagram 31635–244002 41 31635–244202 42 31635–244302 43
Power and sensing–voltage connections 31635–244602 44 31635–244802 45 31635–244902 46
Electrical engine wiring not applicable — not applicable — 31607–541611 47
Standard engine wiring 31635–KPS01 52 31635–KPS01 52 31635–KPS02 53
Accessory Connections
Block heater and battery charger GM70468- 48 GM70468- 48 GM70469- 49
100–275REOZT Wiring Diagrams Reference
Controller Description 100REOZT Page 125–200REOZT Page 275REOZT Page
Decision-Makerr 1000 Controller
Wiring Diagram
Controller and card 31635–050801 7 31635–050801 7 31635–050801 7
Voltage bus not applicable — not applicable — 31635–050902 8
Direct current bus 31635–051001 9 31635–051001 9 31635–051001 9
Power and reading 31635–053701 10 31635–053701 10 31635–053701 10
Measurement card 31635–055202 12 31635–055202 12 31635–055202 12
Predisposition automatic position 31635–056001 13 31635–056001 13 31635–056001 13
Retention fuel tank level 31635–067101 14 31635–067101 14 31635–067101 14
Voltage adjustment 31635–071001 15 31635–071001 15 31635–071001 15
Ground protection relay 31635–078002 16 31635–078002 16 31635–078002 16
Supplementary engine wiring 31635–083001 17 31635–083001 17 31635–083001 17
Relay setting 31635–218301 30 31635–218301 30 31635–218301 30
Power and sensing–wiring diagram 31635–219001 31 31635–219501 33 31635–219801 34
Power and sensing–voltage connections 31635–219301 32 31635–219301 32 31635–219901 35
Speed adjustment 31635–223401 37 31635–223401 37 31635–223401 37
Standard engine wiring 31635–224201 38 31635–224201 38 31635–224201 38
Grounding system 31635–230401 40 31635–230401 40 31635–230401 40
Electrical engine wiring–sheet 1 31635–KPS03 54 31635–KPS03 54 31635–KPS04 55
Electrical engine wiring–sheet 2 31635–KPS05 56 31635–KPS05 56 31635–KPS05 56
Accessory Connections
Block heater and battery charger GM70469- 49 GM70469- 49 GM70470- 50
500REOZT Wiring Diagrams Reference
Controller Description 500REOZT Page
Decision-Makerr 4000 Controller
Wiring Diagram
Controller basic board 31635–124401 18
Electrical engine wiring 31635–204804 19
Predisposition automatic position 31635–205201 20
Voltage bus 31635–205703 21
External emergency stop 31635–205802 22
Analog output board 31635–206201 23
Retention fuel tank level 31635–207403 24
Power and reading 31635–209901 25
Voltage adjustment 31635–211801 26
Power and sensing–wiring diagram 31635–212301 27
Ground protection relay 31635–212701 28
Controller basic board–wiring harness 31635–213201 29
Relay setting 31635–218301 30
Power and sensing–voltage connections 31635–221001 36
Grounding system 31635–230401 40
Accessory Connections
Block heater and battery charger GM70479- 51
