Service Manual Owner's manual
Table Of Contents
- Section 1. Specifications
- Section 2. General
- Section 3. Chassis & Turntable
- 3.1 Tires & Wheels
- 3.2 Wheel Drive Assembly, 2WD
- 3.3 Drive Motor - 2WD (Prior to S/N 83331)
- 3.4 Drive Motor (S/N 83331 to Present)
- 3.5 Torque Hub
- 3.6 Wheel Drive Assembly, 4WD
- 3.7 Torque Hub (4WD Machines W/ Integral Brake)
- Roll, Leak and Brake Testing
- Tightening and Torquing Bolts
- Main Disassembly
- Input Carrier Disassembly
- Output Carrier Disassembly
- Housing-Spindle Disassembly
- Spindle-Brake Disassembly
- Input Carrier Sub-Assembly
- Output Carrier Sub-Assembly
- Spindle-Brake Sub-Assembly
- Housing-Spindle Sub-Assembly
- DW2B Integral Brake Check
- Main Assembly
- 3.8 Drive Brake, 2WD - Mico (Prior to S/N 83331)
- 3.9 Re-Aligning torque hub input coupling
- 3.10 Oscillating Axle Bleeding Procedure and Lockout Test
- 3.11 Swing Drive Hub
- 3.12 Swing Brake - Mico (Prior to S/N 66417)
- 3.13 Swing Motor (Prior to S/N 66417)
- 3.14 Swing Motor (S/N 66417 to Present)
- 3.15 Procedure For Setting Gear Backlash
- 3.16 Swing Bearing
- 3.17 Rotary Coupling
- 3.18 Generator
- 3.19 Ford EFI Engine
- 3.20 Deutz EMR 2 (S/N 85332 to Present)
- 3.21 GM Engine General Maintenance
- 3.22 GM Engine Dual Fuel System
- Fuel Filter
- Electric Lock Off
- EPR Assembly
- Low Pressure Regulator (LPR)
- Air Fuel Mixer
- Electronic Throttle Control (ETC)
- Engine Control Module
- Heated Exhaust Gas Oxygen Sensor
- Gasoline Multi Point Fuel Injection System (MPFI)
- Gasoline Fuel Pump
- Gasoline Pressure And Temperature Sensor Manifold
- Fuel Filter
- Fuel Injector Rail
- Fuel Injector
- 3.23 GM Engine Fuel System Repair
- Propane Fuel System Pressure Relief
- Propane Fuel System Leak Test
- Propane Fuel Filter Replacement
- Electronic Pressure Regulator (EPR) Assembly Replacement
- Temperature Manifold Absolute Pressure (TMAP) Sensor
- Electronic Throttle Control Replacement
- Mixer Replacement
- Coolant Hose Replacement
- Vapor Hose Replacement
- Engine Control Module Replacement
- Heated Exhaust Gas Oxygen Sensor Replacement
- 3.24 GM Engine LPG Fuel System Diagnosis
- Section 4. Boom & Platform
- Section 5. Hydraulics
- Section 6. JLG Control System
- Section 7. Basic Electrical information & schematics
SECTION 4 - BOOM & PLATFORM
4-30 – JLG Lift – 3121139
VALVE DRIVER ERRORS
There are three possible level valve driver errors, short to
battery, short to ground, and open circuit.
1. In the case of a short to ground or an open circuit,
the platform valve cannot be turned on and the fol-
lowing will occur:
a. All interactions with platform leveling shall cease
b. The Electronic Leveling System Fault Lamp shall
flash (to indicate that the leveling function has
been lost).
c. The platform alarm will sound.
d. A system fault will be logged.
e. All function speeds (lift, swing, telescope and
drive) will be placed in creep mode (except
when the platform is in the transport position).
2. In the case of a short to battery on one of the plat-
form leveling valves, the valve cannot be turned off
and the following will occur:
a. The platform dump valve will be turned off to
prevent unintended tilting of the platform.
b. All interactions with platform leveling shall
cease.
c. The Electronic Leveling System Fault Lamp shall
flash (to indicate that the leveling function has
been lost).
d. The platform alarm will sound.
e. A system fault will be logged.
f. All function speeds (lift, swing, telescope and
drive) will be placed in creep mode (except
when the platform is in the transport position)
3. In the case of a short to battery on the platform
dump valve, the valve cannot be turned off. The
controllability of the platform leveling function will be
impaired and the following will occur:
a. All interactions with platform leveling shall
cease.
b. The Electronic Leveling System Fault Lamp shall
flash (to indicate that the leveling function has
been lost).
c. The platform alarm will sound.
d. A system fault will be logged.
e. All function speeds (lift, swing, telescope and
drive) will be placed in creep mode (except
when the platform is in the transport position).
Lift, swing, drive and telescope will continue to operate
In each of the cases above it shall be necessary to re-
cycle the EMS to clear the fault. Operable functions shall
be in the creep mode except while below elevation.
TILT SENSOR ERRORS
If the secondary tilt sensor is faulty, the control system will
continue to utilize information from the primary sensor.
If the primary sensor is faulty, the control system will
switch to the backup sensor for control.
In both cases above the following will occur:
1. The Electronic Leveling System Fault Lamp will flash
(to indicate that there is a leveling fault).
2. The platform alarm will sound.
3. A system fault will be logged.
4. All function speeds (lift, swing, telescope, jib and
drive) will be placed in creep mode (except when
the platform is in the transport position).
5. Automatic platform angle control remains active.
Lift, swing, drive and telescope will continue to operate.
In each of the cases above it will be necessary to re-cycle
the EMS to clear the fault. Operable functions shall be in
the creep mode except while below elevation.