Komatsu Forklift trucks, LPG/petrol - DX20 series, -7/-8

Differential fluid capacity & service interval

Komatsu Forklift trucks, LPG/petrol - DX20 series, -7/-8 require differential fluid with a capacity of 12,5 liters. Service intervals include checks every 3 months or 600 hours, and changes at 1 month or 200 hours and 6 months or 1200 hours. The data covers 4 configurations.

The configuration chart below lists fill volumes and service intervals for each engine and trim variant.

TypeSpecifications
  • FG70-7, Nissan TB42 (40001 ->)
  • Front
  • Use: Normal
  • Capacity 12,5 liter
  • Check 3 months/ 600 hours
  • Change 6 months/ 1200 hours
  • FG70-7, Nissan TB42 (40001 ->)
  • Front
  • Use: Initial service
  • Capacity 12,5 liter
  • Change 1 months/ 200 hours
  • FG70-8, Nissan TB45E (44801 ->)
  • Front
  • Use: Normal
  • Capacity 12,5 liter
  • Check 3 months/ 600 hours
  • Change 6 months/ 1200 hours
  • FG70-8, Nissan TB45E (44801 ->)
  • Front
  • Use: Initial service
  • Capacity 12,5 liter
  • Change 1 months/ 200 hours

Additional Notes

  • The Komatsu FG70-7 and FG70-8 front differential each holds 12.5 liters, a capacity consistent with a heavy-duty drive axle assembly typical of large-frame forklift trucks in the 7-ton class.
  • Both the FG70-7 with the Nissan TB42 engine and the FG70-8 with the Nissan TB45E engine share an identical front differential capacity of 12.5 liters, indicating no variation in axle specification between the two engine configurations.
  • Under normal use conditions, the front differential fluid on both variants is subject to a check interval of every 3 months or 600 hours, whichever comes first.
  • The normal-use fluid change interval is set at 6 months or 1,200 hours, which represents a standard heavy-equipment differential service cycle for sustained operational loads.
  • An initial service change is specified at 1 month or 200 hours for both the FG70-7 and FG70-8 front differentials. An early drain at this interval is standard practice for new or rebuilt gear assemblies, as it removes metallic particles generated during the break-in period before the fluid reaches its full change interval.
  • The FG70-7 serial number range begins at 40001, while the FG70-8 range begins at 44801, establishing distinct production boundaries for each variant despite their shared differential specifications.

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