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GC18S-2
Daewoo GC18S-2 User Manual
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Service Manual
G420E/G424E Tier
LP Engine
Lift Trucks
G15S-2, G18S-2, G20SC-2
GC15S-2, GC18S-2, GC20SC-2
With G420E Tier
LP Engine
G20E-3, G25E-3, G30E-3, G32E-3
GC20E-3, GC25E-3, GC30E-3, GC32E-3
with G424E Tier
LP Engine
SB4136E00
Jun.
2004
2
Table of Contents
Default Chapter
2
Important Safety Information
2
Table of Contents
6
Working with Lpg Equipment
8
Chapter 0 Lpg and Lpg Fuel Tanks
9
LPG Fuel Supply
9
LPG Fuel Tanks
10
Installing LPG Fuel Tanks
10
LPG Fuel Tank Components
11
Fuel Gauge
11
Service Valve
11
Quick Disconnect Coupling
12
Filler Valve
12
Chapter 1 Engine Specification
13
Indication of Engine Serial Number
13
Specifications(G420E)
14
Specifications(G424E)
15
Chapter 2 MI-04 Lpg System Operational Overview
16
MI-04 General Description
16
MI-04 LP Fuel Filter
18
Fuel Lock-Off (Electric)
18
N-2001 Regulator/Converter
19
N-2001 Theory of Operation
20
MI-04 N-CA55-500TR Mixer
21
N-CA55-500-TR Air/Fuel Mixer Theory of Operation
21
MI-04 Electronic Throttle
23
MI-04 Fuel Trim Valve
24
Heated Exhaust Gas Oxygen Sensor (HEGO)
25
SECM (General Description)
26
SECM (Fuel Management)
26
Catalytic Muffler
27
SECM (Load/Speed Management)
28
MI-04 Ignition Management
30
Chapter 3 MI- 04 Maintenance Schedule
31
Recommended Maintenance Schedule
31
Test Fuel System for Leaks
31
Inspect Engine for Fluid Leaks
31
Inspect Vacuum Lines and Fittings
31
Inspect Electrical System
31
Inspect Acceleration Pedal Operation
32
Check Coolant Level
32
Inspect Coolant Hoses
32
Inspect Battery System
32
Inspect Ignition System
32
Replace Spark Plugs
32
Replace LP Fuel Filter Element
33
Testing Fuel Lock-Off Operation
34
Pressure Regulator/Converter Testing and Nspection
34
Fuel Trim Valve Inspection (FTV)
34
Inspect Air/Fuel Valve Mixer Assembly
34
Inspect for Intake Leaks
35
Inspect Throttle Assembly
35
Checking the TMAP Sensor
35
Inspect Engine for Exhaust Leaks
35
Replace Oxygen Sensor
35
Maintenance Schedule
36
Maintenance Schedule Continued
37
Chapter 4 MI-04 Lp Basic Troubleshooting
38
Basic Troubleshooting
38
Chapter 5 MI-04 Lp Advanced Diagnostics
45
Advanced Diagnostics
45
Reading Diagnostic Fault Codes
45
Displaying Fault Codes (DFC) from SECM Memory
46
Clearing Fault (DFC) Codes
46
Fault Action Descriptions
46
Fault List Definitions
47
Codes)
49
Table A. MI-04 Diagnostic Fault Codes (Flash Codes)
49
Chapter 6 MI-04 Electrical Connections
61
Electrical Connections
62
Resistance Checks
63
Voltage Checks
64
Chapter 7 N2001 Pressure Regulator /Converter
65
Removal and Installation of N2001 LP Regulator/Converter
65
Hose Connections
66
N2001 Removal Steps
67
N2001 Regulator Disassembly Steps
68
N2001 Disassembled Service
70
Chapter 8 N-Ca55-500Tr Air/Fuel Mixer
71
Removal and Installation of the N-CA55-500TR Mixer
71
N-CA55-500TR Mixer Removal Steps
72
N-CA55-500TR Disassembly and Service
73
N-CA55-500TR Disassembled Service
75
Installing the Mixer/Throttle Assembly
76
Chapter 9 Test and Adjustments
79
N2001 Service Testing
79
Primary Stage Test Hardware
80
Primary Stage Pressure Test
80
N-CA55-500TR Service AVV (Air Valve Vacuum) Testing
82
Ignition Timing Adjustment
83
Idle Mixture Adjustment
86
Chapter 10 Service Tool Kit
88
Service Tool Kit
88
4
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Daewoo GC18S-2 Specifications
General
Brand
Daewoo
Model
GC18S-2
Category
Engine
Language
English
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