Why won’t my JLG 3394RT shift or is slow to start?
If your JLG Lifting Systems won’t shift or is slow to start, it could be due to obstructed flow through the servo control signal lines; ensure these lines are clear and signal pressure is adequate. Also, the size and condition of the supply and drain orifices affect shift rate; verify the correct orifices are installed and not obstructed, cleaning or replacing them as necessary.
Why is there excessive noise and vibration in my JLG 3394RT Lifting Systems?
Excessive noise and vibration in JLG Lifting Systems can stem from several issues. Insufficient hydraulic fluid may cause cavitation; thus, refill the reservoir to the correct level, ensuring adequate oil supply and unobstructed lines. Trapped air can also cause cavitation, so purge all system lines and components. A loose or incorrect shaft coupling can produce vibrations; ensure the correct coupling is properly fitted. Misaligned shafts create friction, so align them correctly. Finally, overly viscous hydraulic oil can cause cavitation; replace it with fluid appropriate for operating conditions.
What to do if my JLG Lifting Systems is operating hot?
Overheating in JLG Lifting Systems can occur if there is not enough hydraulic fluid to meet cooling demands; therefore, fill the reservoir to the correct level. A faulty or obstructed heat exchanger can also cause overheating; ensure adequate airflow and good operating condition, repairing or replacing as needed. Finally, a system relief valve that is unseated or fails can lead to overheating; repair or replace any malfunctioning relief valves and verify that machine loads are not excessive.
General| Platform Height | 33 ft |
|---|---|
| Gradeability | 30 % |
| Drive Speed - Elevated | 2.5 mph (4 km/h) |
| Drive Speed - Lowered | 2.5 mph (4 km/h) |
| Engine Type | Kubota D1105 Diesel |
| Lift Capacity | 2250 lb |
Contains general safety precautions for aerial platform maintenance, emphasizing attention to warnings and precautions.
Highlights the dangers of high-pressure hydraulic systems and the need to relieve pressure before disconnecting components.
Lists critical safety rules to follow during maintenance, including no smoking and proper attire.
Details key operating specifications for the 3394RT and 4394RT models.
Lists the capacities for the fuel tank and hydraulic tank.
Provides specifications for Deutz and GM engines used in the machine.
Details tire sizes, ply ratings, inflation pressures, and wheel nut torque.
Lists the weights of major machine components for handling and installation.
Recommends specific hydraulic oils and lubricants based on operating conditions.
Provides intervals and recommendations for machine maintenance tasks.
Reference tables for SAE and Metric fastener torque specifications.
Outlines procedures for preparing, inspecting, and maintaining the machine for safe operation.
Provides general information and guidelines for servicing and maintenance procedures.
Details lubrication requirements, hydraulic system maintenance, and oil specifications.
Procedures for measuring acceptable cylinder drift under various conditions.
Guidelines for inspecting and repairing pinned joints using filament wound bearings.
Details periodic maintenance and inspection checks for various machine components.
Describes the operating characteristics of key systems like leveling jacks, power deck, generator, lift, and drive.
Covers tire inflation, damage assessment, replacement, and wheel installation procedures.
Details roll and leak testing, bolt tightening, and oil information for the drive hub.
Describes the Sauer drive motor, including its function and shaft seal replacement.
Covers the steering assembly, axle assembly, and tow bar installation.
Details cylinder removal and assembly procedures for the leveling jacks.
Covers the removal and installation procedures for the platform.
Details procedures for removing lift cylinders, scissor arms, and scissor arm assemblies.
Procedures for removing and installing side compartment covers.
Covers removal, disassembly, and assembly of the ground control station.
Procedures for removing and installing the fuel tank.
Covers removal and installation procedures for the hydraulic tank.
Procedures for removing and installing the battery.
Information on switching fuel sources and using LP gas safely.
Details components related to the Deutz engine, including the engine tray and generator.
Covers maintenance for the GM engine, including drive belt and electrical system.
Details the dual fuel system, including fuel filter, lock-off, EPR, and mixer.
Covers repair procedures for the GM engine's propane and gasoline fuel systems.
Provides diagnostic aids and procedures for the GM engine LPG fuel system.
Explains the operation of double-acting and single-acting hydraulic cylinders.
Describes the function of solenoid control valves, relief valves, and crossover relief valves.
Procedures for checking cylinder operation and leakage, with and without counterbalance valves.
Quarterly test procedures for the oscillating axle lockout cylinder.
General procedures for disassembling, cleaning, inspecting, and assembling hydraulic cylinders.
Procedure for starting up a new or re-installed drive pump.
Guidelines for functional operation and preservation of hydrostatic system life.
Covers pump disassembly, parts inspection, and reassembly procedures.
Identifies and illustrates main valve block, flow divider, and outrigger directional valves.
Details gear pump specifications and priming procedures.
Provides specifications and cross-section view of the Axial HI 45 Pump.
Covers removal and installation procedures for the charge pump filter.
Details specifications and torque values for the auxiliary pump motor.
Illustrates steer cylinder and lift cylinder components and provides torque specifications.
Information on connecting, using, and navigating the handheld analyzer.
Procedures for calibrating elevation sensors, joysticks, and tilt sensors.
Lists fault codes displayed on the analyzer, their descriptions, and priority.
Provides context for schematics and troubleshooting electrical problems.
Explains fundamental multimeter operations like grounding, backprobing, Min/Max, polarity, and scale.
Procedure for applying silicone dielectric compound to AMP connectors to prevent oxidation and electrical issues.
Instructions for assembling and disassembling DT/DTP and HD30/HDP20 series Deutsch connectors.
Details basic checks for mechanical and inductive proximity limit switches.
Contains electrical schematics for diesel, dual fuel, and hydraulic systems.
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