SECTION 3 - CHASSIS & TURNTABLE
3-112
– JLG Lift –
3121160
Lockoff Solenoid
The lockoff solenoid is used to reduce the possibility of
backfires. The EPM controls the opening and closing of
the lockoff so that as a shutdown is commanded, the lock-
off is closed, but the ignition system continues to operate
to burn off unburned fuel in the manifold. This will cause
longer than usual start times, because the manifold must
fill up with fuel again before the engine will fire. This will
also cause the engine to run for one to two seconds after
ignition is turned off.
Megajector Diagnostic Code Descriptions
The following diagnostic codes are specific to the mega-
jector. They will be displayed on the analyzer if the JLG
Control System senses a fault dealing with the megajec-
tor. Refer to Section 6 - JLG Control System for more infor-
mation concerning the Control System.
DTC 353
- Megajector delivery pressure higher than
expected. This code will set if the difference between the
Megajector actual pressure and the Megajector com-
manded pressure is greater than 4.00 inches (10.1 cm) of
H
2
O.
a. Fuel Supply
- Check fuel supply pressure at the
megajector inlet fitting. Fuel supply pressure on
LPG applications should be between 3-5" (7.6-
12.7 cm) H
2
O.
b. Lockoff Solenoid
- Check the lockoff to make
sure it is sealing when closed. If it is not com-
pletely sealing, it could allow pressure creep in
the fuel system.
c. Reference Line
- Make sure the reference line is
in place between the Megajector and the carbu-
retor balance port. Make sure the hose is not
kinked or restricted in any way and has no holes
in it.
d. Regulator
- Observe the regulator with the
engine running to see if it is icing up. If it’s icing
up, refer to Engine Cooling System below.
e. Engine Cooling System
- Make sure the engine
cooling system is operating properly and there
are no air locks in the system. Make sure the
engine is operating at the proper temperature.
Check the coolant hoses at the regulator and
make sure they are both warm to verify proper
coolant circulation.
If the fuel system is operating properly, the Megajector
has an internal failure and must be replaced.
DTC 354
- Megajector delivery pressure lower than
expected. This code will set if the difference between the
Megajector actual pressure and the Megajector com-
manded pressure is less than -4.00 inches (10.1 cm) of
H
2
O.
a. Fuel Supply
- Check fuel supply pressure at the
megajector inlet fitting. Fuel supply pressure on
LPG applications should be between 3-5" (7.6-
12.7 cm) H
2
O.
b. Fuel System Hoses
- Make sure all fuel system
hoses are in good condition. They should be
clamped tight, free from kinks with no cuts,
pinches, etc.
c. Lockoff Solenoid
- Check the lock off to make
sure it is opening properly. If it is not opening
completely, it could cause low fuel pressure.
d. Reference Line
- Make sure the reference line is
in place between the Megajector and the carbu-
retor balance port. Make sure the hose is not
kinked or restricted in any way and has no holes
in it.
e. Regulator
- Observe the regulator with the
engine running to see if it is icing up. If it’s icing
up, refer to Engine Cooling System below.
f. Engine Cooling System
- Make sure the engine
cooling system is operating properly and there
are no air locks in the system. Make sure the
engine is operating at the proper temperature.
Check the coolant hoses at the regulator and
make sure they are both warm to verify proper
coolant circulation.
If the fuel system is operating properly, the Megajector
has an internal failure and must be replaced.
DTC 355
- Megajector comm. lost. This codes will set if
the communication (CAN link) between the Megajector
and the EPM is not present.
a. CAN Circuits
- Check CAN circuits for continuity
and shorts to power or ground and for proper
connections.
If the CAN circuits are ok and all wiring connections are
good, the Megajector has an internal failure and must be
replaced.
DTC 361
- Megajector voltage supply high.
a. Voltage
- Check battery voltage. If the voltage at
the battery is greater than 18 volts, either the
charging system or the megajector is faulty.
Содержание 740A
Страница 1: ...Service and Maintenance Manual Models 740A 740AJ P N 3121160 January 8 2013 ...
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Страница 20: ...xviii JLG Lift 3121160 LIST OF TABLES TABLE NO TITLE PAGE NO This page left blank intentionally ...
Страница 35: ...SECTION 1 SPECIFICATIONS 3121160 JLG Lift 1 15 Figure 1 4 Torque Chart SAE Fasteners Sheet 1 of 3 ...
Страница 36: ...SECTION 1 SPECIFICATIONS 1 16 JLG Lift 3121160 Figure 1 5 Torque Chart SAE Fasteners Sheet 2 of 3 ...
Страница 37: ...SECTION 1 SPECIFICATIONS 3121160 JLG Lift 1 17 Figure 1 6 Torque Chart SAE Fasteners Sheet 3 of 3 ...
Страница 38: ...SECTION 1 SPECIFICATIONS 1 18 JLG Lift 3121160 Figure 1 7 Torque Chart METRIC Fasteners Sheet 1 of 3 ...
Страница 39: ...SECTION 1 SPECIFICATIONS 3121160 JLG Lift 1 19 Figure 1 8 Torque Chart METRIC Fasteners Sheet 2 of 3 ...
Страница 40: ...SECTION 1 SPECIFICATIONS 1 20 JLG Lift 3121160 Figure 1 9 Torque Chart METRIC Fasteners Sheet 3 of 3 ...
Страница 50: ...SECTION 2 GENERAL 2 10 JLG Lift 3121160 Figure 2 2 Engine Operating Temperature Specifications Ford 4150548 E ...
Страница 51: ...SECTION 2 GENERAL 3121160 JLG Lift 2 11 Figure 2 3 Engine Operating Temperature Specifications GM 4150548 E ...
Страница 52: ...SECTION 2 GENERAL 2 12 JLG Lift 3121160 NOTES ...
Страница 109: ...SECTION 3 CHASSIS TURNTABLE 3121160 JLG Lift 3 57 Figure 3 39 Swing Hub ...
Страница 111: ...SECTION 3 CHASSIS TURNTABLE 3121160 JLG Lift 3 59 Figure 3 40 Swing Brake Assembly Ausco Prior to S N 0300068040 ...
Страница 123: ...SECTION 3 CHASSIS TURNTABLE 3121160 JLG Lift 3 71 Figure 3 43 Swing Drive Hub Fairfield S N 0300068040 to Present ...
Страница 135: ...SECTION 3 CHASSIS TURNTABLE 3121160 JLG Lift 3 83 Figure 3 48 Rotary Coupling Port Location ...
Страница 138: ...SECTION 3 CHASSIS TURNTABLE 3 86 JLG Lift 3121160 A B D D B C Figure 3 51 Auxiliary Pump Sheet 1 of 2 ...
Страница 153: ...SECTION 3 CHASSIS TURNTABLE 3121160 JLG Lift 3 101 Figure 3 54 EFI Component Location ...
Страница 156: ...SECTION 3 CHASSIS TURNTABLE 3 104 JLG Lift 3121160 Figure 3 55 ECM EPM Identification ECM EPM ...
Страница 167: ...SECTION 3 CHASSIS TURNTABLE 3121160 JLG Lift 3 115 Figure 3 59 Deutz EMR 2 Troubleshooting Flow Chart ...
Страница 168: ...SECTION 3 CHASSIS TURNTABLE 3 116 JLG Lift 3121160 Figure 3 60 Deutz EMR 2 Vehicle Side Connection Diagram ...
Страница 169: ...SECTION 3 CHASSIS TURNTABLE 3121160 JLG Lift 3 117 Figure 3 61 Deutz EMR 2 Engine Side Connection Diagram Sheet 1 of 2 ...
Страница 170: ...SECTION 3 CHASSIS TURNTABLE 3 118 JLG Lift 3121160 Figure 3 62 Deutz EMR 2 Engine Side Connection Diagram Sheet 2 of 2 ...
Страница 171: ...SECTION 3 CHASSIS TURNTABLE 3121160 JLG Lift 3 119 Figure 3 63 EMR 2 Engine Plug Pin Identification ...
Страница 172: ...SECTION 3 CHASSIS TURNTABLE 3 120 JLG Lift 3121160 Figure 3 64 EMR 2 Vehicle Plug Pin Identification ...
Страница 173: ...SECTION 3 CHASSIS TURNTABLE 3121160 JLG Lift 3 121 Figure 3 65 EMR2 Fault Codes Sheet 1 of 5 ...
Страница 174: ...SECTION 3 CHASSIS TURNTABLE 3 122 JLG Lift 3121160 Figure 3 66 EMR2 Fault Codes Sheet 2 of 5 ...
Страница 175: ...SECTION 3 CHASSIS TURNTABLE 3121160 JLG Lift 3 123 Figure 3 67 EMR2 Fault Codes Sheet 3 of 5 ...
Страница 176: ...SECTION 3 CHASSIS TURNTABLE 3 124 JLG Lift 3121160 Figure 3 68 EMR2 Fault Codes Sheet 4 of 5 ...
Страница 177: ...SECTION 3 CHASSIS TURNTABLE 3121160 JLG Lift 3 125 Figure 3 69 EMR2 Fault Codes Sheet 5 of 5 ...
Страница 236: ...SECTION 4 BOOM PLATFORM 4 20 JLG Lift 3121160 Figure 4 7 Boom Valve and Limit Switches Location 0271989 A ...
Страница 237: ...SECTION 4 BOOM PLATFORM 3121160 JLG Lift 4 21 Figure 4 8 Transportation Switch Installation CE Only 0258384 A ...
Страница 238: ...SECTION 4 BOOM PLATFORM 4 22 JLG Lift 3121160 Figure 4 9 Tower Power Track Installation Sheet 1 of 2 ...
Страница 239: ...SECTION 4 BOOM PLATFORM 3121160 JLG Lift 4 23 Figure 4 10 Tower Power Track Installation Sheet 2 of 2 ...
Страница 244: ...SECTION 4 BOOM PLATFORM 4 28 JLG Lift 3121160 Figure 4 14 Rotator Assembly HELAC ...
Страница 276: ...SECTION 4 BOOM PLATFORM 4 60 JLG Lift 3121160 THIS SENSOR ON NON ADE MACHINES ONLY Figure 4 21 UMS Sensor Location ...
Страница 277: ...SECTION 4 BOOM PLATFORM 3121160 JLG Lift 4 61 ADE MACHINES NON ADE MACHINES Figure 4 22 UMS Module Location ...
Страница 286: ...SECTION 4 BOOM PLATFORM 4 70 JLG Lift 3121160 NOTES ...
Страница 307: ...SECTION 5 HYDRAULICS 3121160 JLG Lift 5 21 Figure 5 17 Variable Displacement Pump Rexroth ...
Страница 316: ...SECTION 5 HYDRAULICS 5 30 JLG Lift 3121160 NOTES ...
Страница 319: ...SECTION 6 JLG CONTROL SYSTEM 3121160 JLG Lift 6 3 Figure 6 2 ADE Block Diagram ...
Страница 325: ...SECTION 6 JLG CONTROL SYSTEM 3121160 JLG Lift 6 9 Figure 6 8 Analyzer Flow Chart Version 5 X Software Sheet 2 of 4 ...
Страница 328: ...SECTION 6 JLG CONTROL SYSTEM 6 12 JLG Lift 3121160 Figure 6 11 Control Module Location ...
Страница 374: ...SECTION 6 JLG CONTROL SYSTEM 6 58 JLG Lift 3121160 NOTES ...
Страница 381: ...SECTION 7 BASIC ELECTRICAL INFORMATION SCHEMATICS 3121160 JLG Lift 7 7 Figure 7 11 Connector Installation ...
Страница 400: ...SECTION 7 BASIC ELECTRICAL INFORMATION SCHEMATICS 7 26 JLG Lift 3121160 Figure 7 34 Hydraulic Schematic Sheet 1 of 6 ...
Страница 402: ...SECTION 7 BASIC ELECTRICAL INFORMATION SCHEMATICS 7 28 JLG Lift 3121160 Figure 7 36 Hydraulic Schematic Sheet 3 of 6 ...
Страница 404: ...SECTION 7 BASIC ELECTRICAL INFORMATION SCHEMATICS 7 30 JLG Lift 3121160 Figure 7 38 Hydraulic Schematic Sheet 5 of 6 ...
Страница 406: ...SECTION 7 BASIC ELECTRICAL INFORMATION SCHEMATICS 7 32 JLG Lift 3121160 NOTES ...
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