SECTION 3 - CHASSIS & TURNTABLE
3-142
– JLG Lift –
3121160
13
1. Turn OFF the ignition.
2. Disconnect the LPL connector.
3. Install a test light between the pins of the LPL connector.
4. Crank the engine. The test light should illuminate.
Does the test light illuminate?
- -
Go to Step 14
Go to Step 16
14
Using a DVOM, check the resistance of the low pressure lock-off (LPL).
Is the resistance within the specified range?
12
W
- 16
W
Go to Step 15
Go to Step 23
15
1. Turn the ignition OFF.
2. Close the manual shut-off valve on the LPG tank.
CAUTION: When disconnecting LPG fuel lines, liquid LPG may be present. Per-
form this step in a well ventilated area.
3. Loosen the fuel inlet hose fitting at the inlet of the LPL.
Was fuel present when the fitting was loosened?
- -
Go to Step 23
Go to Step 17
16
1. Turn OFF the ignition.
2. Connect the test light to chassis ground and probe pin A of the LPL connector.
3. Crank the engine. The test light should illuminate.
Does the test light illuminate?
- -
Go to Step 20
Go to Step 21
17
1. Remove the LPG fuel filter / LPL.
2. Remove the filter from the LPL.
3. Empty the contents of the inlet side of the LPG fuel filter onto a clean surface.
4. Inspect the contents of the LPG fuel filter for an excessive amount of foreign
material or water. If necessary, locate and repair the source of contamination.
5. Verify the LPG fuel filter is not restricted or plugged.
Was a problem found?
- -
Go to Step 19
Go to Step 18
18
The fuel supply system or hoses are plugged or restricted, locate and repair the
problem.
Is the action complete?
- -
Go to Step 26
- -
19
Replace the fuel filter. Refer to Fuel Filter Replacement.
Is the action complete?
- -
Go to Step 26
- -
20
Repair the open in the lock-off ground circuit.
Is the action complete?
- -
Go to Step 26
- -
21
Repair the open in the lock-off power circuit.
Is the action complete?
- -
Go to Step 26
- -
22
Replace the low pressure regulator (LPR). Refer to Low Pressure Regulator
Replacement.
Is the action complete?
- -
Go to Step 26
- -
23
Replace the lock-off. Refer to Lock-off Replacement.
Is the action complete?
- -
Go to Step 26
- -
24
Replace the mixer assembly. Refer to Fuel Mixer Replacement.
Is the action complete?
- -
Go to Step 26
- -
Table 3-12. LPF Fuel System Diagnosis
STEP
ACTION
VALUE(S)
YES
NO
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: ......