What to do if my JLG Lifting Systems unit is off and the engine won't crank?
If the JLG Lifting Systems unit is off or disabled, and the engine won't crank, begin by checking the position of the selector switch and ensure the inhibit run is released. Inspect the warning LED and address any faults before restarting the RBS. Verify the start battery voltage, check the control fuse, and look for any loose wiring or connections.
Why is my JLG Lifting Systems engine temperature high?
If your JLG Lifting Systems engine temperature is high, check for any obstructions blocking the cooling airflow to the engine. Ensure the ambient temperature is within the engine's design limits. Also, verify the correct operation of the engine temperature sensor.
What to do if my JLG Lifting Systems engine is overcranking?
If the JLG Lifting Systems engine is experiencing an overcrank, first check the fuel level and connections. Then, verify the operation of the fuel solenoid and fuel pump. Check the start battery voltage. If the engine exhaust contains white smoke, it indicates fuel is entering the engine but the engine is not firing. If the ambient temperature is low, verify that the heater and/or glow plug are operating.
Why is my JLG Lifting Systems engine running with underspeed?
If the JLG Lifting Systems engine is running with underspeed, make sure there's enough fuel and combustion air going to the engine. Check the air cleaner. Also, check the governor lever setting and readjust it if needed.
What to do if my JLG Lifting Systems shows low oil pressure?
If the JLG Lifting Systems reports low oil pressure, check the oil level and the oil supply lines. Also, verify the correct operation of the oil pressure switch with a test gauge.
What causes overspeed in JLG Lifting Systems?
If the JLG Lifting Systems indicates an overspeed condition, verify the setting of the governor lever and readjust it if required.
What to do if my JLG Lifting Systems shows overvoltage?
If the JLG Lifting Systems shows an overvoltage, check the alternator output voltage.
What to do if my JLG Lifting Systems has no speed signal?
If the JLG Lifting Systems has no speed signal, check the wiring connections.
General| Brand | JLG |
|---|---|
| Model | M450AJ |
| Category | Boom Lifts |
| Language | English |
Details recommended maintenance and lubrication schedules and procedures.
Information on preparing, inspecting, and maintaining the machine for safe operation.
Instructions for checking turntable bearing bolt condition and replacing the swing bearing.
Information on the engine, alternator, and generator components.
Covers removal, disassembly, inspection, and assembly of boom components.
Guidelines for correctly assembling hydraulic connections and applying specified torque.
Details on the removal, installation, disassembly, and assembly of various hydraulic cylinders.
Procedures for removing and installing various lift cylinders.
Guidelines for setting and adjusting hydraulic pressure relief valves.
Instructions for connecting and using the JLG Control System Analyzer Kit.
Information on adjusting machine performance parameters like acceleration and speed.
Specifies machine positions and procedures for performing various functional tests.
Step-by-step procedure for calibrating the steering system.
Procedure for calibrating the tilt sensor to ensure proper machine leveling.
Steps for calibrating the Load Sensing System (LSS).
Information on the Load Sensing System (LSS) operation and calibration requirements.
Provides solutions for common difficulties encountered with the JLG control system.
Guidelines for applying dielectric grease to electrical connections to prevent issues.
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