Wiring Diagrams
Industrial Generator Sets
Models:
25--150REZG
Controllers:
Decision-Makerr 3000
Decision-Makerr 550
Decision-Makerr 3+
TP-6712 4/10a
Product Identification Information
Product identification numbers determine service parts.
Record the product identification numbers in the spaces
below immediately after unpacking the products so that
the numbers are readily available for future reference.
Record field-installed kit numbers after installing the
kits.
Generator Set Identification Numbers
Record the product identification numbers from the
generator set nameplate(s).
Model Designation
Specification Number
Serial Number
Accessory Number
Accessory Description
Engine Identification
Record the product identification information from the
engine nameplate.
Manufacturer
Model Designation
Serial Number
Controller Identification
Record the controller description from the generator set
operation manual, spec sheet, or sales invoice.
Controller Description
Introduction
This manual provides wiring diagrams for the
25--150REZG generator sets equipped with one of the
following controllers:
D Decision-Makerr 3000
D Decision-Makerr 550
Information in this publication represents data available
at the time of print. Kohler Co. reserves the right to
change this publication and the products represented
without notice and without any obligation or liability
whatsoever.
D Decision-Makerr 3+ (40--150REZG)
Service Assistance
For professional advice on generator set power
requirements and conscientious service, please contact
your nearest Kohler distributor or dealer.
D Consult the Yellow Pages under the heading
Generators—Electric.
D Visit
the Kohler Power Systems website at
KohlerPower.com.
D Look at the labels and stickers on your Kohler product
or review the appropriate literature or documents
included with the product.
D Call toll free in the US and Canada 1-800-544-2444.
D Outside the US and Canada, call the nearest regional
office.
Headquarters Europe, Middle East, Africa
(EMEA)
Kohler Power Systems
3 rue de Brennus
93200 Saint Denis
France
Phone: (33) 1 49 178300
Fax: (33) 1 49 178301
China
North China Regional Office, Beijing
Phone: (86) 10 6518 7950
(86) 10 6518 7951
(86) 10 6518 7952
Fax: (86) 10 6518 7955
East China Regional Office, Shanghai
Phone: (86) 21 6288 0500
Fax: (86) 21 6288 0550
India, Bangladesh, Sri Lanka
India Regional Office
Bangalore, India
Phone: (91) 80 3366208
(91) 80 3366231
Fax: (91) 80 3315972
Japan, Korea
North Asia Regional Office
Tokyo, Japan
Phone: (813) 3440-4515
Fax: (813) 3440-2727
Latin America
Latin America Regional Office
Lakeland, Florida, USA
Phone: (863) 619-7568
Fax: (863) 701-7131
Asia Pacific
Power Systems Asia Pacific Regional Office
Singapore, Republic of Singapore
Phone: (65) 6264-6422
Fax: (65) 6264-6455
TP-6712 4/10
Introduction
3
Wiring Diagrams
Use the Wiring Diagram Cross-Reference chart to
determine the wiring diagram version number for a
given model number and spec number. Then find that
version number, the controller type, and the alternator
type on the Wiring Diagrams Reference chart to
determine the wiring diagram numbers for your unit.
Refer to Controller Identification for controller type
identification, if necessary.
Wiring Diagram Cross-Reference
Generator Set Model No.
Hz
Generator Set Spec No.
Wiring Diagram Version No.
25REZG
50/60
GM69415-GA1,3,5,7,9,11
1
30REZG
50/60
GM69415-GA2,4,6,8,10,12
1
40REZG
50/60
GM66092-GA1,3,5
2
45REZG
50/60
GM66092-GA2,4,6
2
50REZG
50/60
GM66910-GA1,2,3
3
60REZG
50/60
GM66911-GA1,2,3
3
80REZG
50/60
GM66590-GA1,3,9
3
100REZG
50/60
GM66590-GA2,4,10
3
125REZG
50/60
GM65362-GA1,2,5
3
150REZG
50/60
GM64060-GA1
3
25/30REZG Wiring Diagrams Reference
Controller Description
Decision-Makerr 550 Controller
Point-to-Point Wiring Diagram
Sheet 1
Sheet 2
Sheet 3
Schematic Diagram
Sheet 1
Sheet 2
Sheet 3
Accessory Connections
Accessories
Remote Annunciator Kit
Decision-Makerr 3000 Controller
Point-to-Point Wiring Diagram
Sheet 1
Sheet 2
Sheet 3
Schematic Diagram
Sheet 1
Sheet 2
Accessory Connections
Accessories
Alternator Reconnections
4-Lead
12-Lead
4
Wiring Diagrams
Version 1
Page
GM63941A-D
GM63941B-D
GM63941C-D
28
29
30
ADV-7600A-D
ADV-7600B-D
ADV-7600C-D
11
12
13
GM16088A-H
GM16088B-H
26
27
GM73379A-A
GM73379B-A
GM73379C-A
45
46
47
ADV-7834A-A
ADV-7834B-A
21
22
GM67191-A
34
ADV-5875A-L
ADV-5875B-L
9
10
TP-6712 4/10
40/45REZG Wiring Diagrams Reference
Controller Description
Decision-Makerr 550 Controller
Point-to-Point Wiring Diagram
Sheet 1
Sheet 2
Sheet 3
Schematic Diagram
Sheet 1
Sheet 2
Sheet 3
Accessory Connections
Accessories
Remote Annunciator Kit
Decision-Makerr 3000 Controller
Point-to-Point Wiring Diagram
Sheet 1
Sheet 2
Sheet 3
Schematic Diagram
Sheet 1
Sheet 2
Accessory Connections
Accessories
Decision-Makerr 3+ Controller
Point-to-Point Wiring Diagram
Sheet 1
Sheet 2
Sheet 3
Schematic Diagram
Sheet 1
Sheet 2
Accessory Connections
Accessories
Remote Annunciator Kit
Alternator Reconnections
4-Lead
12-Lead
TP-6712 4/10
Version 2
Page
GM63941A-D
GM63941B-D
GM63941C-D
28
29
30
ADV-7600A-D
ADV-7600B-D
ADV-7600C-D
11
12
13
GM16088A-H
GM16088B-H
26
27
GM73379A-A
GM73379B-A
GM73379C-A
45
46
47
ADV-7834A-A
ADV-7834B-A
21
22
GM67191-A
34
GM63942A-D
GM63942B-D
GM63942C-D
31
32
33
ADV-7601A-C
ADV-7601B-C
14
15
328912A-H
328912B-H
48
49
ADV-5875A-L
ADV-5875B-L
9
10
Wiring Diagrams
5
50--150REZG Wiring Diagrams Reference
Controller Description
Decision-Makerr 550 Controller
Point-to-Point Wiring Diagram
Sheet 1
Sheet 2
Sheet 3
Schematic Diagram
Sheet 1
Sheet 2
Sheet 3
Accessory Connections
Accessories
Remote Annunciator Kit
Decision-Makerr 3000 Controller
Point-to-Point Wiring Diagram
Sheet 1
Sheet 2
Sheet 3
Sheet 4
Schematic Diagram
Sheet 1
Sheet 2
Sheet 3
Accessory Connections
Accessories
Decision-Makerr 3+ Controller
Point-to-Point Wiring Diagram
Sheet 1
Sheet 2
Sheet 3
Schematic Diagram
Sheet 1
Sheet 2
Accessory Connections
Accessories
Remote Annunciator Kit
Alternator Reconnections
4-Lead
12-Lead
6
Wiring Diagrams
Version 3
Page
GM70545A-C
GM70545B-C
GM70545C-C
38
39
40
ADV-7737A-B
ADV-7737B-B
ADV-7737CB
16
17
18
GM16088A-H
GM16088B-H
26
27
GM72401A-B
GM72401B-B
GM72401C-B
GM72401D-B
41
42
43
44
ADV-7861A-B
ADV-7861B-B
ADV-7861C-B
23
24
25
GM67191-A
34
GM70544A-C
GM70544B-C
GM70544C-C
35
36
37
ADV-7738A-B
ADV-7738B-B
19
20
328912A-H
328912B-H
48
49
ADV-5875A-L
ADV-5875B-L
9
10
TP-6712 4/10
Controller Identification
Decision-Makerr 3000 Controller
Decision-Makerr 550 Controller
Decision-Makerr 3+, 16-Light Controller
TP-6712 4/10
Controller Identification
7
Notes
8
Controller Identification
TP-6712 4/10
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10
Wiring Diagrams
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12
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14
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16
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18
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20
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24
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26
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KOHLER CO. Kohler, Wisconsin 53044
Phone 920-565-3381, Fax 920-459-1646
For the nearest sales/service outlet in the
US and Canada, phone 1-800-544-2444
KohlerPower.com
TP-6712 4/10a
E 2009, 2010 by Kohler Co. All rights reserved.
Kohler Power Systems
Asia Pacific Headquarters
7 Jurong Pier Road
Singapore 619159
Phone (65) 6264-6422, Fax (65) 6264-6455