SECTION 3 - CHASSIS & TURNTABLE
3-140
– JLG Lift –
3121160
Diagnostic Aids
This procedure is intended to diagnose a vehicle operat-
ing on LPG. If the vehicle will not continue to run on LPG,
refer to Hard Start for preliminary checks. Before proceed-
ing with this procedure, verify that the vehicle has a suffi-
cient 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
equivalent).
• 0-10 PSI Gauge
Test Description
The numbers below refer to step numbers on the diagnos-
tic table.
5. This step determines if the LPR requires replacement
6. This step determines if the problems are in the mechan-
ical 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 replace-
ment
17. This step determines if the Fuel Filter requires replace-
ment.
Summary of Contents for 740A
Page 1: ...Service and Maintenance Manual Models 740A 740AJ P N 3121160 January 8 2013 ...
Page 2: ......
Page 52: ...SECTION 2 GENERAL 2 12 JLG Lift 3121160 NOTES ...
Page 109: ...SECTION 3 CHASSIS TURNTABLE 3121160 JLG Lift 3 57 Figure 3 39 Swing Hub ...
Page 135: ...SECTION 3 CHASSIS TURNTABLE 3121160 JLG Lift 3 83 Figure 3 48 Rotary Coupling Port Location ...
Page 153: ...SECTION 3 CHASSIS TURNTABLE 3121160 JLG Lift 3 101 Figure 3 54 EFI Component Location ...
Page 156: ...SECTION 3 CHASSIS TURNTABLE 3 104 JLG Lift 3121160 Figure 3 55 ECM EPM Identification ECM EPM ...
Page 173: ...SECTION 3 CHASSIS TURNTABLE 3121160 JLG Lift 3 121 Figure 3 65 EMR2 Fault Codes Sheet 1 of 5 ...
Page 174: ...SECTION 3 CHASSIS TURNTABLE 3 122 JLG Lift 3121160 Figure 3 66 EMR2 Fault Codes Sheet 2 of 5 ...
Page 175: ...SECTION 3 CHASSIS TURNTABLE 3121160 JLG Lift 3 123 Figure 3 67 EMR2 Fault Codes Sheet 3 of 5 ...
Page 176: ...SECTION 3 CHASSIS TURNTABLE 3 124 JLG Lift 3121160 Figure 3 68 EMR2 Fault Codes Sheet 4 of 5 ...
Page 177: ...SECTION 3 CHASSIS TURNTABLE 3121160 JLG Lift 3 125 Figure 3 69 EMR2 Fault Codes Sheet 5 of 5 ...
Page 244: ...SECTION 4 BOOM PLATFORM 4 28 JLG Lift 3121160 Figure 4 14 Rotator Assembly HELAC ...
Page 286: ...SECTION 4 BOOM PLATFORM 4 70 JLG Lift 3121160 NOTES ...
Page 307: ...SECTION 5 HYDRAULICS 3121160 JLG Lift 5 21 Figure 5 17 Variable Displacement Pump Rexroth ...
Page 316: ...SECTION 5 HYDRAULICS 5 30 JLG Lift 3121160 NOTES ...
Page 319: ...SECTION 6 JLG CONTROL SYSTEM 3121160 JLG Lift 6 3 Figure 6 2 ADE Block Diagram ...
Page 328: ...SECTION 6 JLG CONTROL SYSTEM 6 12 JLG Lift 3121160 Figure 6 11 Control Module Location ...
Page 374: ...SECTION 6 JLG CONTROL SYSTEM 6 58 JLG Lift 3121160 NOTES ...
Page 406: ...SECTION 7 BASIC ELECTRICAL INFORMATION SCHEMATICS 7 32 JLG Lift 3121160 NOTES ...
Page 407: ......