Jlg 601S Service Manual User Manual Page 123
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- Table of contents
- TROUBLESHOOTING
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SECTION 3 - CHASSIS & TURNTABLE
3120866 – JLG Lift – 3-83
The Engine Module is designed to maintain exhaust emis-
sion levels to government mandated standards while pro-
viding excellent operation and fuel efficiency. The Engine
Module monitors numerous engine functions via elec
-
tronic sensors such as the throttle position (TP) sensor
and the heated oxygen sensor (HO2S).
ENGINE MODULE INPUTS/OUTPUTS
Inputs—Operating Conditions
• Engine Coolant Temperature
• Crankshaft Position
• Exhaust Oxygen Content
• Manifold Absolute Pressure
• Battery Voltage
• Throttle Position
• Fuel Pump Voltage
• Intake Air Temperature
• Camshaft Position
Outputs - System Controlled
• Fuel Control
•Idle Air Control
• Electric Fuel Pump
•Diagnostics:
- Malfunction Indicator Lamp
- Data Link Connector (DLC)
ENGINE MODULE SERVICE PRECAUTIONS
The Engine Module is designed to withstand normal cur-
rent draws associated with engine operation. When ser-
vicing the Engine Module, observe the following
guidelines:
• Do not overload any circuit.
• Do not probe wires for testing. This can cause a volt-
age drop that would be critical to the operation of the
Engine Module.
• When testing for opens and shorts, do not ground or
apply voltage to any of the Engine Module's circuits
unless instructed to do so.
• When measuring voltages, use only a digital voltmeter
with an input impedance of at least 10 megohms.
• Do not jump start with more than 12 volts. This could
cause damage to the electronic components.
• Do not employ any non-standard practices such as
charging the battery with an arc welder.
• Take proper precautions to avoid static damage to the
Engine Module. Refer to "Electrostatic Discharge Dam
-
age" for more information.
THROTTLE POSITION (TP) SENSOR
The throttle position (TP) sensor is a potentiometer con-
nected to the throttle shaft on the throttle body which is
built into the electronic governor. The Engine Module
monitors the voltage on the signal line and calculates
throttle position. As the throttle valve angle is changed,
the TP sensor signal also changes. At a closed throttle
position, the output of the TP sensor is low. As the throttle
valve opens, the output increases so that at wide open
throttle (WOT), the output voltage should be above 4
volts.
The Engine Module calculates fuel delivery based on
throttle valve angle (operator demand). A broken or loose
TP sensor may cause intermittent bursts of fuel from an
injector and unstable idle because the Engine Module
thinks the throttle is moving. A hard failure in the TP sen
-
sor 5-Volt reference or signal circuits for greater than 2
consecutive seconds will set either a DTC 12 or DTC 22. A
hard failure with the TP sensor ground circuit for more
than two consecutive seconds may set DTC 22. If either
DTC 12 or DTC 22 are set, the throttle will be forced to a
6% (idle) position.
USE OF CIRCUIT TESTING TOOLS
Do not use a test light to diagnose the engine electrical
systems unless specifically instructed by the diagnostic
procedures. A test light can put an excessive load on an
Engine Module circuit and result in component damage.
For volt-age measurements, use only a digital voltmeter
with an input impedance of at least 10 megohms.
- P/N - 3120866 1
- ADE System Identification 3
- – JLG Lift – 4
- PRECAUTIONS 5
- REVISON LOG 6
- (Continued) 10
- TABLE OF CONTENTS 11
- SECTION 1. SPECIFICATIONS 17
- 1-2 – JLG Lift – 3120866 18
- SECTION 1 - SPECIFICATIONS 19
- Te st N o tes 19
- 1.5 TORQUE REQUIREMENTS 19
- 1.6 LUBRICATION 20
- Ford LRG425 Engine 20
- Deutz F3M1011F Engine 20
- Hydraulic Oil 21
- Lubrication Specifications 21
- 1.7 PRESSURE SETTINGS 21
- 1.8 CYLINDER SPECIFICATIONS 22
- 1.9 MAJOR COMPONENT WEIGHTS 22
- 1.11 SERIAL NUMBER LOCATIONS 23
- SECTION 2. GENERAL 27
- 2-2 – JLG Lift – 3120866 28
- 3120866 – JLG Lift – 2-3 29
- 2-4 – JLG Lift – 3120866 30
- 3120866 – JLG Lift – 2-5 31
- 2-6 – JLG Lift – 3120866 32
- SECTION 2 - GENERAL 33
- 2.8 AMP CONNECTOR 33
- AMP Connectors 33
- Wedge Lock 35
- Service - Voltage Reading 35
- 3.1 TORQUE HUB, DRIVE 41
- 3-2 – JLG Lift – 3120866 42
- 3120866 – JLG Lift – 3-3 43
- 3120866 – JLG Lift – 3-5 45
- 3-6 – JLG Lift – 3120866 46
- 3120866 – JLG Lift – 3-7 47
- 3-8 – JLG Lift – 3120866 48
- 3120866 – JLG Lift – 3-9 49
- 3120866 – JLG Lift – 3-11 51
- 3.3 DRIVE BRAKE - AUSCO 52
- 3120866 – JLG Lift – 3-13 53
- 3.4 DRIVE BRAKE - MICO 54
- 3120866 – JLG Lift – 3-15 55
- Bleeding 56
- Spare Parts Kits 57
- 3-18 – JLG Lift – 3120866 58
- Disassembly and Assembly 59
- 3-20 – JLG Lift – 3120866 60
- 3120866 – JLG Lift – 3-21 61
- 3-22 – JLG Lift – 3120866 62
- Assembly Notes 63
- 3-24 – JLG Lift – 3120866 64
- Te st i n g a n d Se t u p 65
- 3.6 DRIVE MOTOR ADJUSTMENT 66
- Description 67
- Shaft Seal Replacement 67
- Loop Flushing Valve 68
- 3120866 – JLG Lift – 3-31 71
- 3-32 – JLG Lift – 3120866 72
- 3120866 – JLG Lift – 3-33 73
- Slipper retainer 75
- Ball guide 75
- 3120866 – JLG Lift – 3-37 77
- 3-38 – JLG Lift – 3120866 78
- 3120866 – JLG Lift – 3-39 79
- 3-40 – JLG Lift – 3120866 80
- Initial Start-up Procedures 81
- 3-42 – JLG Lift – 3120866 82
- PROCEDURE AND LOCKOUT TEST 83
- Lockout Cylinder Bleeding 83
- Oscillating Axle Lockout Test 83
- 3.10 STEER ADJUSTMENTS 84
- 3120866 – JLG Lift – 3-45 85
- .0015" Feeler Gauge 86
- 3120866 – JLG Lift – 3-47 87
- 3-48 – JLG Lift – 3120866 88
- Swing Bearing Torque Values 89
- 3.13 SWING BRAKE - AUSCO 89
- 3120866 – JLG Lift – 3-51 91
- 3.14 SWING MOTOR 92
- Reassembly 93
- Motor Timing 94
- 3120866 – JLG Lift – 3-55 95
- 3-56 – JLG Lift – 3120866 96
- 3120866 – JLG Lift – 3-57 97
- 3-58 – JLG Lift – 3120866 98
- Mounting-Controller 99
- 3-60 – JLG Lift – 3120866 100
- 3120866 – JLG Lift – 3-61 101
- Troubleshooting 102
- 3120866 – JLG Lift – 3-63 103
- 3.19 THROTTLE CHECKS AND 104
- ADJUSTMENTS - DEUTZ ENGINE 104
- (PRIOR TO S/N 61306) 104
- 3120866 – JLG Lift – 3-65 105
- Failure Modes 106
- 3120866 – JLG Lift – 3-67 107
- Checking the Ignition 108
- 3.22 CHECKING THE FUEL 109
- S/N 58209) 110
- Performing Diagnostics 110
- Engine Module and Sensors 111
- 3-72 – JLG Lift – 3120866 112
- 3120866 – JLG Lift – 3-73 113
- 3-74 – JLG Lift – 3120866 114
- 3120866 – JLG Lift – 3-75 115
- 3-76 – JLG Lift – 3120866 116
- 3120866 – JLG Lift – 3-77 117
- 3-78 – JLG Lift – 3120866 118
- 3120866 – JLG Lift – 3-79 119
- 3120866 – JLG Lift – 3-81 121
- 3120866 – JLG Lift – 3-83 123
- ENGINE MODULE INPUTS/OUTPUTS 123
- THROTTLE POSITION (TP) SENSOR 123
- USE OF CIRCUIT TESTING TOOLS 123
- 3-84 – JLG Lift – 3120866 124
- Fuel System 125
- 3-86 – JLG Lift – 3120866 126
- FUEL METERING SYSTEM PURPOSE 126
- 3-88 – JLG Lift – 3120866 128
- 3120866 – JLG Lift – 3-89 129
- ELECTRONIC IGNITION 129
- IGNITION COIL 129
- ENGINE MODULE (ECM OR EPM) 129
- 3-90 – JLG Lift – 3120866 130
- 4.1 BOOM MAINTENANCE 131
- Disassembly Boom Sections 132
- 3120866 – JLG Lift – 4-3 133
- 4-4 – JLG Lift – 3120866 134
- 3120866 – JLG Lift – 4-5 135
- 4-6 – JLG Lift – 3120866 136
- Inspection 137
- Assembly 138
- 3120866 – JLG Lift – 4-9 139
- Installation 140
- Torque Procedures 140
- 4.3 WEAR PADS 141
- Main Boom 141
- 4-12 – JLG Lift – 3120866 142
- ADJUSTMENT 143
- 4.6 ROTATOR - HELAC 144
- Disassembly 144
- 4-16 – JLG Lift – 3120866 146
- 3120866 – JLG Lift – 4-17 147
- Lift, Swing, and Drive Cards 148
- Flow Control Card 148
- 4.8 FOOT SWITCH ADJUSTMENT 149
- 4-20 – JLG Lift – 3120866 150
- SECTION 5. HYDRAULICS 151
- SECTION 5 - HYDRAULICS 152
- 5.4 CYLINDER REPAIR 152
- Cleaning and Inspection 154
- 5.5 CYLINDER REMOVAL AND 158
- INSTALLATION 158
- Boom Lift Cylinder Removal 159
- Inspections and Adjustments 163
- Minor Repair and Replacement 166
- Platform Level 170
- 4 Wheel Steer (If Equipped) 170
- 5-24 – JLG Lift – 3120866 174
- 6.1 INTRODUCTION 177
- 6-2 – JLG Lift – 3120866 178
- SYSTEM ANALYZER 179
- 6.3 USING THE ANALYZER 179
- 6-4 – JLG Lift – 3120866 180
- HAND HELD ANALYZER 181
- 6-6 – JLG Lift – 3120866 182
- 6.6 MACHINE SETUP 184
- 6.7 LEVEL VEHICLE DESCRIPTION 184
- 3120866 – JLG Lift – 6-9 185
- 6-10 – JLG Lift – 3120866 186
- 3120866 – JLG Lift – 6-11 187
- 6-12 – JLG Lift – 3120866 188
- 4150365 - 3 189
- 6-14 – JLG Lift – 3120866 190
- 3120866 – JLG Lift – 6-15 191
- 6-16 – JLG Lift – 3120866 192
- 3120866 – JLG Lift – 6-17 193
- 6-18 – JLG Lift – 3120866 194
- 3120866 – JLG Lift – 6-19 195
- 6-20 – JLG Lift – 3120866 196
- 3120866 – JLG Lift – 6-21 197
- 6-22 – JLG Lift – 3120866 198
- 3120866 – JLG Lift – 6-23 199
- 6-24 – JLG Lift – 3120866 200
- 3120866 – JLG Lift – 6-25 201
- 6-26 – JLG Lift – 3120866 202
- 3120866 – JLG Lift – 6-27 203
- 6-28 – JLG Lift – 3120866 204
- 3120866 – JLG Lift – 6-29 205
- 4150364 - 6 206
- 3120866 – JLG Lift – 6-31 207
- 6-32 – JLG Lift – 3120866 208
- 3120866 – JLG Lift – 6-33 209
- 6-34 – JLG Lift – 3120866 210
- 3120866 – JLG Lift – 6-35 211
- 6-36 – JLG Lift – 3120866 212
- STRUCTURE 213
- 6-38 – JLG Lift – 3120866 214
- 3120866 – JLG Lift – 6-39 215
- 6-40 – JLG Lift – 3120866 216
- 3120866 – JLG Lift – 6-41 217
- 6-42 – JLG Lift – 3120866 218
- SECTION 7. SCHEMATICS 219
- SECTION 7 - SCHEMATICS 220
- JLG Worldwide Locations 240
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