Jungheinrich TFG 425s

Questions and Answers

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Derek WolfeAug 22, 2025
What to do if my Jungheinrich TFG 425s starter does not turn?
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  Kimberly BarberAug 22, 2025
  If the starter doesn't turn, here are some things to check: * The battery charge might be too low. Check the battery charge and charge the battery if necessary. * The battery terminal cable might be loose or the terminals oxidized. Clean and grease the terminals, then tighten the battery terminal cable. * The starter cable might be loose or broken. Check the starter cable and tighten or replace it as required. * The starter solenoid might be jammed. Check if the magnetic switch audibly engages.
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Travis ChaneyAug 26, 2025
Why Jungheinrich TFG 425s Forklifts overtemperature indicator lit?
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  morenoalexanderAug 26, 2025
  If the overtemperature indicator is lit, it could be due to several reasons: * The engine oil level might be too low. Check the engine oil level and top it up if necessary. * The radiator might be contaminated. Clean the radiator. * The coolant level might be too low. Check the engine radiator system for leaks and add coolant if necessary. * The fan V belt might be slipping. Check the V belt tension and tighten or replace it as required.
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Denise WilliamsAug 28, 2025
Why Jungheinrich TFG 425s Forklifts truck does not reach max. speed?
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  Justin SmithAug 28, 2025
  If the truck isn't reaching its maximum speed, it could be because the hydraulic reservoir oil level is too low. Check the hydraulic oil and top it up if necessary.
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garroyoAug 31, 2025
What to do if Jungheinrich TFG 425s steering is sluggish?
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  jamesowensAug 31, 2025
  If the steering feels sluggish, check the steering axle tire pressure and increase it to the correct pressure if necessary.
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Danielle JimenezSep 3, 2025
Why Jungheinrich TFG 425s Forklifts lift speed too low?
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  Betty JordanSep 3, 2025
  If the lift speed is too low, consider these possible causes: * The hydraulic reservoir oil level might be too low. Check the hydraulic oil and top it up if necessary. * The hydraulic reservoir discharge system might be contaminated or blocked. Replace the hydraulic reservoir discharge system.
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Misty SmithSep 6, 2025
Why Jungheinrich TFG 425s Forklifts engine running but truck does not travel?
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  James MyersSep 6, 2025
  If the engine is running but the truck won't move, it could be due to: * The travel direction switch being in neutral. Set the travel direction switch to the desired direction. * The parking brake being applied. Release the parking brake.
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Juan GrahamSep 9, 2025
What causes excessive steering play in Jungheinrich Forklifts?
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  Tony CordovaSep 9, 2025
  Excessive steering play can be caused by air in the steering system. Check the hydraulic oil level, top up if necessary, and then turn the steering wheel several times from one end to the other.
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Natasha HaynesSep 10, 2025
Why Jungheinrich Forklifts engine oil indicator lit during operation?
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  Sandra ScottSep 12, 2025
  The engine oil indicator might light up during operation because the engine oil level is too low. Check the engine oil level and top it up if needed.
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samanthabrownSep 12, 2025
Why Jungheinrich Forklifts load cannot be raised to max. height?
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  Paula HollowaySep 12, 2025
  If the load cannot be raised to the maximum height, the hydraulic reservoir oil level might be too low. Check the hydraulic oil and top it up if necessary.
C
Chris GregoryNov 15, 2025
What to do if my Jungheinrich Forklifts engine does not start?
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  eclarkNov 15, 2025
  If the engine doesn't start, consider these potential causes: * The air filter might be contaminated. In this case, clean or replace the air filter. * The fuel tank could be empty, or the injection system might have suctioned in air. Refill with diesel and bleed the injection system. * There might be water in the fuel system. If so, discharge the fuel system and refill the truck. * The fuel filter could be contaminated. Check the fuel flow and replace the fuel filter if necessary. * Paraffin separation from the diesel might have occurred (flakes forming). Park the truck in a warm room until the separation returns to its original state, and replace the fuel filter if needed, filling with winter diesel. * The LPG bottle shutoff valve might be closed. Open the shutoff valve. * ...

Summary

Technical Specifications

Performance Data

Presents performance metrics like capacity, speed, lift, lowering, gradeability, and acceleration for different models.

Dimensions

Provides detailed measurements of the truck's components and overall size.

Weights

Engine Data

Identification Points and Data Plates

Data Plate

Truck Capacity Plate

Details how the capacity plate indicates truck capacity based on mast and load center.

Fuelling the Truck

General

Safety regulations for handling diesel fuel and LPG, including risks of ignition and unsecured trucks.

Safety Regulations for Handling Diesel Fuel and LPG

Essential safety rules for handling fuels and LPG to prevent accidents and hazards.

Adding Diesel

LPG Containers

Details safety instructions for handling and replacing LPG bottles, including explosion risks.

Operation

Safety Regulations for the Operation of the Forklift Truck

Covers driver authorization, operator responsibilities, and rules for unauthorized use and damage reporting.

Displays and Controls

Identifies and explains the function of various displays, controls, and operating elements.

Control Panel with Display Unit

Control Panel Buttons

Preparing the Truck for Operation

Checks and Operations Before Starting Daily Operation

Lists essential pre-operation checks to ensure safety and proper truck function.

Setting Up the Operator Position

Guides on adjusting the seat, steering column, and armrest for optimal ergonomics and safety.

Seat Belt

Details the importance of seat belt usage, maintenance, and checking its automatic locking system.

Industrial Truck Operation

Safety Regulations for Truck Operation

Covers travel routes, hazardous situations, travel conduct, and visibility for safe operation.

Preparing the Truck for Operation

Starting Procedure for the DFG

Step-by-step guide for starting the DFG engine, including pre-heat and indicator checks.

Starting Procedure for the TFG

Procedure for starting the TFG, including safety notes for liquid gas handling.

Parking the Truck Securely

Explains how to safely park and leave the truck, including LPG truck considerations.

Emergency Disconnect

Travel

Procedures for operating the truck in travel mode, including parking brake release and speed selection.

Brakes

Describes the truck's braking systems: service brake, emergency stop brake, and parking brake.

Adjusting the Forks

Lifting, Transporting and Depositing Loads

Safe procedures for lifting, moving, and placing loads, emphasizing correct palletizing and capacity limits.

Operating the Lift Mechanism and Integrated Attachments

Covers safe operation of lift mechanisms and attachments using SOLO-PILOT and MULTI-PILOT controls.

Safety Instructions for Operating Additional Attachments

Industrial Truck Maintenance

Operational Safety and Environmental Protection

Emphasizes safety during maintenance, prohibiting modifications and specifying original parts.

Maintenance Safety Regulations

Working on the Electrical System

Safety precautions for working on the electrical system, stressing voltage-free status and removing jewelry.

Wheels

Lubricants and Lubrication Schedule

Maintenance and Repairs

Lifting and Jacking Up the Truck Safely

Instructions on using suitable lifting gear and securing the truck to prevent tipover.

Replacing Wheels

Detailed steps for dismantling and fitting wheels, including safety warnings and torque specifications.

Hydraulic System

Safety precautions and procedures for checking and maintaining the hydraulic oil level and filters.

Engine Maintenance

Covers general engine maintenance, starting procedures, and specific checks for DFG and TFG models.

Checking Electrical Fuses

Cleaning

Starter Battery

Restoring the Truck to Service After Maintenance and Repairs

Safety Tests to be Performed at Intervals and After Unusual Incidents

Covers periodic safety checks, inspections, and the proprietor's responsibility for fault rectification.

Servicing and Inspection