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MDKBU
Onan MDKBU Service Manual
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California
Proposition 65 W
arning
Diesel engine exhaust and some of its constituents are known
to the State of California to cause cancer
, birth defects, and
other reproductive harm.
Redistribution or publication of this document,
by any means, is strictly prohibited.
2
4
Table of Contents
Table of Contents
4
Section Page
5
Safety Precautions
8
Introduction
10
About this Manual
10
Model Identification
10
Control Panel
12
Remote Control and Monitoring
12
Local Control Panel
12
Digital Display
14
Operation
20
Fuel
20
Engine Oil
20
Engine Coolant
20
Batteries
20
Fire Extinguisher Port
21
Pre-Start Checks
22
Priming the Fuel System
22
Starting the Genset
22
Stopping the Genset
22
Emergency Stop
22
Loading the Genset
23
Load Operation
24
Resetting Line Circuit Breakers
24
Connecting to Shore Power
24
Cold Temperature Operation
25
Care of New or Re-Built Engine
25
Exercising the Genset
25
Storing the Genset
25
Periodic Maintenance
26
General Inspection
27
Maintaining the Battery and Battery Connections
27
Checking Engine Oil Level
28
Changing Engine Oil and Filter
28
Draining/Replacing Fuel Filters
31
Maintaining the Engine Cooling System
32
Genset Control
40
Overview
40
Genset Controller
40
Digital Display
44
Control Switch (S4)
44
Emergency Stop Switch (CB1)
44
DC Circuit Breaker (CB2)
44
Master Hour Meter (M11)
44
Engine Oil Pressure Sender (E1)
45
Engine Coolant Temperature Sender (E2)
45
Raw Water Flow Switch (S6)
46
High Exhaust Temperature Switch (S5)
47
Low Coolant Level Switch (S3)
47
Governor Actuator (A12)
48
Glow Plug Relay (K3)
48
Starter Relay (K4)
48
Ground Isolation Relay (K9)
48
Network Interface Module (NIM)
49
Bonding for Electrostatic Discharge Control
51
Engine and Accessories
52
Major Engine Service
52
Engine Sensors
52
Governor Actuator
52
Exhaust Manifold
53
Fuel System
55
Glow Plugs
55
Starter
57
Ground Isolation Relay K9
57
Battery Charging Alternator
57
Raw Water Pump
57
Generator
58
Overview
58
Testing Generator
59
Disassembly
66
Reassembly
67
Reconnecting the Generator
67
Line Circuit Breakers
67
To Change Frequency
67
To Adjust Voltage
67
Reconfiguring Voltage and Frequency
68
As Manufactured
68
Reconnection Label
68
Changing Frequency
68
Reconnecting Generator
68
Adjusting Voltage Using Optional Digital Display
69
Adjusting Voltage Using Control Switch
69
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Onan MDKBU Specifications
General
Brand
Onan
Model
MDKBU
Category
Portable Generator
Language
English
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