SECTION 3 - CHASSIS & TURNTABLE
3-198
3121234
3.29 GM ENGINE LPG FUEL SYSTEM DIAGNOSIS
Fuel System Description
To maintain fuel and emission control on the LPG fuel system
the Engine Control Units (ECM) relies on numerous engine
sensor and output data from the Electronic Pressure Regulator
(EPR). The ECM will then determine the target fuel calibration
and command the EPR to reposition the voice coil to the
proper position which, subsequently reposition the secondary
lever in the pressure regulator to maintain proper control. The
EPR and ECM will continue to communicate back and forth
during normal operation.
In the event that the EPR fails to communicate or the Commu-
nications Area Network (CAN) cable fails to transmit data the
regulator will operate in an open loop configuration. As the air
valve vacuum in the mixer venturi is communicated to the sec-
ondary chamber of the regulator the secondary diaphragm
will be drawn in a downwards motion. This downward motion
will cause the secondary lever to open thus allowing more fuel
to enter the mixer.
In the (LPR) the fuel is vaporized and the pressure reduced in
two stages. The first stage reduces the pressure to approxi-
mately 1.0 to 3.0 psi (6.8 to 20.6 kPa). The second stage
reduces the pressure to approximately negative 1.5" of water
column.
The fuel is then drawn from the secondary chamber of the LPR
by the vacuum generated by air flowing through the mixer.
This vacuum signal is also used to generate lift for the mixer air
valve. This vacuum signal is most commonly referred to as air
valve vacuum. In the mixer, the fuel mixes with the air entering
the engine. This air/ fuel mixture is then drawn into the engine
for combustion.
Diagnostic Aids
This procedure is intended to diagnose a vehicle operating on
LPG. If the vehicle will not continue to run on LPG, refer to
Hard Start for preliminary checks. Before proceeding with this
procedure, verify that the vehicle has a sufficient quantity of
fuel and that liquid fuel is being delivered to the LPR. Also,
ensure that the manual shut off valve on the LPG tank is fully
opened and that the excess flow valve has not been activated.
Tools Required:
• 7/16 Open end wrench (for test port plugs)
• DVOM (GM J 39200, Fluke 88 or equivalent).
• 12 volt test light
Diagnostic Scan Tool
• Diagnostic Display tool.
Pressure Gauges
• IMPCO ITK-2 Test kit
• Water Column Gauge / Manometer (GM 7333-6 or equiva-
lent).
• 0-10 PSI Gauge
Test Description
The numbers below refer to step numbers on the diagnostic
table.
5. This step determines if the LPR requires replacement
6. This step determines if the problems are in the mechanical
side of the Pressure Regulator or the Electronic Voice Coil
10. This step determines if the Mixer requires replacement
14. This step determines if the Lock Off requires replacement
17. This step determines if the Fuel Filter requires replacement.
Figure 3-130. EPR Assembly
Содержание 680S
Страница 1: ...Service and Maintenance Manual Model 680S Prior to SN 0300189341 P N 3121234 December 05 2017 AS NZS...
Страница 2: ......
Страница 48: ...SECTION 2 GENERAL 2 10 3121234 Figure 2 1 Engine Operating Temperature Specifications Deutz 4150548 E...
Страница 49: ...SECTION 2 GENERAL 3121234 2 11 Figure 2 2 Engine Operating Temperature Specifications Ford 4150548 E...
Страница 50: ...SECTION 2 GENERAL 2 12 3121234 Figure 2 3 Engine Operating Temperature Specifications Caterpillar 4150548 E...
Страница 51: ...SECTION 2 GENERAL 3121234 2 13 Figure 2 4 Engine Operating Temperature Specifications GM 4150548 E...
Страница 52: ...SECTION 2 GENERAL 2 14 3121234 NOTES...
Страница 55: ...SECTION 3 CHASSIS TURNTABLE 3121234 3 3 This page left blank intentionally...
Страница 86: ...SECTION 3 CHASSIS TURNTABLE 3 34 3121234 Figure 3 25 Assembly Tools Bearing Cone Pressing B Bearing...
Страница 87: ...SECTION 3 CHASSIS TURNTABLE 3121234 3 35 Figure 3 26 Assembly Tools Bearing Cone Pressing A Bearing...
Страница 88: ...SECTION 3 CHASSIS TURNTABLE 3 36 3121234 Figure 3 27 Assembly Tools Bearing Cup Pressing A B Bearings...
Страница 89: ...SECTION 3 CHASSIS TURNTABLE 3121234 3 37 Figure 3 28 Assembly Tools Seal Pressing...
Страница 90: ...SECTION 3 CHASSIS TURNTABLE 3 38 3121234 Figure 3 29 Assembly Tools Spacer Brake Disc Installation...
Страница 91: ...SECTION 3 CHASSIS TURNTABLE 3121234 3 39 Figure 3 30 Assembly Tools Brake Retaining Ring Installation...
Страница 139: ...SECTION 3 CHASSIS TURNTABLE 3121234 3 87 Figure 3 62 Swing Hub Prior to SN 0300134352...
Страница 143: ...SECTION 3 CHASSIS TURNTABLE 3121234 3 91 Figure 3 64 Swing Brake...
Страница 196: ...SECTION 3 CHASSIS TURNTABLE 3 144 3121234 Figure 3 82 Rotary Coupling Port Location Prior to SN 0300137913 5 1660303 B...
Страница 205: ...SECTION 3 CHASSIS TURNTABLE 3121234 3 153 This page left blank intentionally...
Страница 206: ...SECTION 3 CHASSIS TURNTABLE 3 154 3121234 Figure 3 89 Generator Troubleshooting Circuit Diagram Sheet 1 of 2...
Страница 207: ...SECTION 3 CHASSIS TURNTABLE 3121234 3 155 Figure 3 90 Generator Troubleshooting Circuit Diagram Sheet 2 of 2...
Страница 208: ...SECTION 3 CHASSIS TURNTABLE 3 156 3121234 Figure 3 91 Generator Electrical Circuit Diagram...
Страница 209: ...SECTION 3 CHASSIS TURNTABLE 3121234 3 157 Figure 3 92 Power Board PC1 Electrical Circuit Diagram...
Страница 210: ...SECTION 3 CHASSIS TURNTABLE 3 158 3121234 Figure 3 93 Power Board PC2 Electrical Circuit Diagram Sheet 1 of 2...
Страница 211: ...SECTION 3 CHASSIS TURNTABLE 3121234 3 159 Figure 3 94 Power Board PC2 Electrical Circuit Diagram Sheet 2 of 2...
Страница 224: ...SECTION 3 CHASSIS TURNTABLE 3 172 3121234 Figure 3 103 EMR 2 Engine Side Equipment...
Страница 225: ...SECTION 3 CHASSIS TURNTABLE 3121234 3 173 Figure 3 104 Deutz EMR 2 Troubleshooting Flow Chart...
Страница 226: ...SECTION 3 CHASSIS TURNTABLE 3 174 3121234 Figure 3 105 Deutz EMR 2 Vehicle Side Connection Diagram...
Страница 227: ...SECTION 3 CHASSIS TURNTABLE 3121234 3 175 Figure 3 106 Deutz EMR 2 Engine Side Connection Diagram Sheet 1 of 2...
Страница 228: ...SECTION 3 CHASSIS TURNTABLE 3 176 3121234 Figure 3 107 Deutz EMR 2 Engine Side Connection Diagram Sheet 2 of 2...
Страница 229: ...SECTION 3 CHASSIS TURNTABLE 3121234 3 177 Figure 3 108 EMR 2 Engine Plug Pin Identification...
Страница 230: ...SECTION 3 CHASSIS TURNTABLE 3 178 3121234 Figure 3 109 EMR 2 Vehicle Plug Pin Identification...
Страница 231: ...SECTION 3 CHASSIS TURNTABLE 3121234 3 179 Figure 3 110 EMR2 Fault Codes Sheet 1 of 5...
Страница 232: ...SECTION 3 CHASSIS TURNTABLE 3 180 3121234 Figure 3 111 EMR2 Fault Codes Sheet 2 of 5...
Страница 233: ...SECTION 3 CHASSIS TURNTABLE 3121234 3 181 Figure 3 112 EMR2 Fault Codes Sheet 3 of 5...
Страница 234: ...SECTION 3 CHASSIS TURNTABLE 3 182 3121234 Figure 3 113 EMR2 Fault Codes Sheet 4 of 5...
Страница 235: ...SECTION 3 CHASSIS TURNTABLE 3121234 3 183 Figure 3 114 EMR2 Fault Codes Sheet 5 of 5...
Страница 264: ...SECTION 3 CHASSIS TURNTABLE 3 212 3121234 NOTES...
Страница 285: ...SECTION 4 BOOM PLATFORM 3121234 4 21 This page left blank intentionally...
Страница 286: ...SECTION 4 BOOM PLATFORM 4 22 3121234 Figure 4 7 Boom Assembly Cutaway Sheet 1 of 2 10 15 12 6 9...
Страница 333: ...SECTION 4 BOOM PLATFORM 3121234 4 69 Figure 4 25 Load Sensing Device...
Страница 336: ...SECTION 4 BOOM PLATFORM 4 72 3121234 NOTES...
Страница 402: ...SECTION 5 BASIC HYDRAULICS INFORMATION SCHEMATICS 5 66 3121234 Figure 5 100 Fault logic Troubleshooting...
Страница 403: ...SECTION 5 BASIC HYDRAULICS INFORMATION SCHEMATICS 3121234 5 67 Figure 5 101 Fault logic Troubleshooting...
Страница 404: ...SECTION 5 BASIC HYDRAULICS INFORMATION SCHEMATICS 5 68 3121234 Figure 5 102 Fault logic Troubleshooting...
Страница 407: ...SECTION 5 BASIC HYDRAULICS INFORMATION SCHEMATICS 3121234 5 71 This page left blank intentionally...
Страница 410: ...SECTION 5 BASIC HYDRAULICS INFORMATION SCHEMATICS 5 74 3121234 Figure 5 105 Hydraulic Schematic Sheet 3 of 8 SHEET 2...
Страница 412: ...SECTION 5 BASIC HYDRAULICS INFORMATION SCHEMATICS 5 76 3121234 Figure 5 107 Hydraulic Schematic Sheet 5 of 8 SHEET 3...
Страница 414: ...SECTION 5 BASIC HYDRAULICS INFORMATION SCHEMATICS 5 78 3121234 Figure 5 109 Hydraulic Schematic Sheet 7 of 8 SHEET 4...
Страница 416: ...SECTION 5 BASIC HYDRAULICS INFORMATION SCHEMATICS 5 80 3121234 NOTES...
Страница 423: ...SECTION 6 JLG CONTROL SYSTEM 3121234 6 7 Figure 6 2 ADE Block Diagram...
Страница 445: ...SECTION 6 JLG CONTROL SYSTEM 3121234 6 29 Figure 6 6 Analyzer Flow Chart Prior to Version 5 X Software Sheet 4 of 4...
Страница 447: ...SECTION 6 JLG CONTROL SYSTEM 3121234 6 31 Figure 6 8 Analyzer Flow Chart Version 5 X Software Sheet 2 of 4...
Страница 461: ...SECTION 6 JLG CONTROL SYSTEM 3121234 6 45 1 1001103667 Y Figure 6 22 Ground Control Module Sheet 1 of 3...
Страница 462: ...SECTION 6 JLG CONTROL SYSTEM 6 46 3121234 1 1001103667 Y Figure 6 23 Ground Control Module Sheet 2 of 3...
Страница 463: ...SECTION 6 JLG CONTROL SYSTEM 3121234 6 47 1 1001103667 Y Figure 6 24 Ground Control Module Sheet 3 of 3...
Страница 464: ...SECTION 6 JLG CONTROL SYSTEM 6 48 3121234 CONNECTOR 1001141138 D Figure 6 25 Platform Control Module Sheet 1 of 2...
Страница 465: ...SECTION 6 JLG CONTROL SYSTEM 3121234 6 49 CONNECTOR 1001141138 D Figure 6 26 Platform Control Module Sheet 2 of 2...
Страница 480: ...SECTION 6 JLG CONTROL SYSTEM 6 64 3121234 NOTES...
Страница 491: ...SECTION 7 BASIC ELECTRICAL INFORMATION SCHEMATICS 3121234 7 11 Figure 7 15 Connector Installation...
Страница 526: ...SECTION 7 BASIC ELECTRICAL INFORMATION SCHEMATICS 7 46 3121234 Figure 7 54 Electrical Schematic GM Sheet 1 of 2 SHEET 1...
Страница 528: ...SECTION 7 BASIC ELECTRICAL INFORMATION SCHEMATICS 7 48 3121234 NOTES...
Страница 529: ......