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Jungheinrich DFG 425s - User Manual

Jungheinrich DFG 425s
229 pages
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DFG/TFG 425s / 435s
G
10.07-
Operating Instructions
51077936 ► 51209061
01.09 ► 03.13

Table of Contents

Questions and Answers

  • S
    smaloneAug 19, 2025
    Why Jungheinrich DFG 425s engine oil indicator lit during operation?
    • J
      johnsonrickAug 19, 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.
  • N
    nancymcgeeAug 21, 2025
    What to do if my Jungheinrich Forklifts starter does not turn?
    • M
      Mariah TateAug 21, 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.
  • T
    Tyler NolanAug 25, 2025
    Why Jungheinrich Forklifts overtemperature indicator lit?
    • M
      mccartyraymondAug 25, 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.
  • I
    isaiahwhiteAug 27, 2025
    Why Jungheinrich DFG 425s truck does not reach max. speed?
    • C
      cruzjesseAug 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.
  • Y
    Yesenia LambertAug 30, 2025
    What to do if Jungheinrich DFG 425s Forklifts steering is sluggish?
    • S
      Sarah JordanAug 30, 2025
      If the steering feels sluggish, check the steering axle tire pressure and increase it to the correct pressure if necessary.
  • S
    ssmithSep 2, 2025
    Why Jungheinrich DFG 425s lift speed too low?
    • T
      Tracy GatesSep 2, 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.
  • D
    Dale EvansSep 5, 2025
    Why Jungheinrich DFG 425s engine running but truck does not travel?
    • D
      deborah78Sep 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.
  • M
    Mr. Jacob Kelly IISep 8, 2025
    What causes excessive steering play in Jungheinrich DFG 425s?
    • M
      Mrs. Michelle ThompsonSep 8, 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.
  • M
    Mr. Aaron KelleySep 12, 2025
    Why Jungheinrich DFG 425s load cannot be raised to max. height?
    • L
      Loretta VargasSep 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.
  • K
    Kelly PotterNov 14, 2025
    What to do if my Jungheinrich DFG 425s Forklifts engine does not start?
    • G
      Gina TerryNov 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

Correct Use and Application

Correct application

Defines correct usage, load handling, and operational restrictions for the truck.

Fuelling the Truck

Safety regulations for handling diesel fuel and LPG

Critical safety rules for handling fuels to prevent accidents and fires.

Operation

Safety Regulations for the Operation of the Forklift Truck

Rules for driver authorization, unauthorized use, damage, and repairs.

Maintenance and repairs

Preparing the truck for maintenance and repairs

Essential safety preparations before commencing maintenance or repair work.

Lifting and jacking up the truck safely

Safe procedures for lifting and supporting the truck during maintenance.

Servicing and Inspection

Maintenance checklist DFG

Jungheinrich DFG 425s Specifications

General IconGeneral
BrandJungheinrich
ModelDFG 425s
CategoryForklifts
LanguageEnglish

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