Komatsu Forklift trucks, diesel - DX20 series

Differential fluid capacity & service interval

Komatsu Forklift trucks, diesel - DX20 series differential fluid capacity ranges from 12,5 to 13 liters. Service intervals include checks at 3 months or 600 hours, and changes at 1 month or 200 hours and 6 months or 1200 hours. The data covers 12 configurations.

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

TypeSpecifications
  • FD60-10, Komatsu SAA4D95LE-5-A (55001 ->)
  • Front
  • Use: Normal
  • Capacity 13 liter
  • Check 3 months/ 600 hours
  • Change 6 months/ 1200 hours
  • FD60-10, Komatsu SAA4D95LE-5-A (55001 ->)
  • Front
  • Use: Initial service
  • Capacity 13 liter
  • Change 1 months/ 200 hours
  • FD70-10, Komatsu SAA4D95LE-5-A (55001 ->)
  • Front
  • Use: Normal
  • Capacity 13 liter
  • Check 3 months/ 600 hours
  • Change 6 months/ 1200 hours
  • FD70-10, Komatsu SAA4D95LE-5-A (55001 ->)
  • Front
  • Use: Initial service
  • Capacity 13 liter
  • Change 1 months/ 200 hours
  • FD70-7, Komatsu 6D102E (40001 ->)
  • Front
  • Use: Normal
  • Capacity 12,5 liter
  • Check 3 months/ 600 hours
  • Change 6 months/ 1200 hours
  • FD70-7, Komatsu 6D102E (40001 ->)
  • Front
  • Use: Initial service
  • Capacity 12,5 liter
  • Change 1 months/ 200 hours
  • FD70T-8, Komatsu S6D102E (46001 ->)
  • Front
  • Use: Normal
  • Capacity 12,5 liter
  • Check 3 months/ 600 hours
  • Change 6 months/ 1200 hours
  • FD70T-8, Komatsu S6D102E (46001 ->)
  • Front
  • Use: Initial service
  • Capacity 12,5 liter
  • Change 1 months/ 200 hours
  • FD80-10, Komatsu SAA4D95LE-5-A (55001 ->)
  • Front
  • Use: Normal
  • Capacity 13 liter
  • Check 3 months/ 600 hours
  • Change 6 months/ 1200 hours
  • FD80-10, Komatsu SAA4D95LE-5-A (55001 ->)
  • Front
  • Use: Initial service
  • Capacity 13 liter
  • Change 1 months/ 200 hours
  • FD80T-8, Komatsu SA6D102E (46001 ->)
  • Front
  • Use: Normal
  • Capacity 12,5 liter
  • Check 3 months/ 600 hours
  • Change 6 months/ 1200 hours
  • FD80T-8, Komatsu SA6D102E (46001 ->)
  • Front
  • Use: Initial service
  • Capacity 12,5 liter
  • Change 1 months/ 200 hours

Additional Notes

  • The front differential fluid capacity across the DX20 series splits into two values depending on the engine fitted. Models paired with the Komatsu SAA4D95LE-5-A engine — the FD60-10, FD70-10, and FD80-10 — each carry 13 liters, while models fitted with the 6D102E or S6D102E/SA6D102E engine family hold 12.5 liters.
  • The 0.5-liter difference between the two capacity groups is a fixed specification tied to the engine and axle combination rather than to the load rating of the truck, since the FD70-10 and FD70-7 share the same nominal capacity class yet differ in front differential fill volume.
  • All models in the series share an identical normal-use check interval of every 3 months or 600 hours, whichever comes first. This dual-trigger format means the interval is governed by elapsed calendar time in low-utilization applications and by operating hours in high-utilization ones.
  • The normal-use fluid change interval for all listed models is 6 months or 1,200 hours. At that cadence, the change interval is exactly double the check interval, meaning a fluid level inspection falls at the midpoint of every drain cycle.
  • An initial service change is specified for every model at 1 month or 200 hours. At 200 hours, the initial drain occurs well before the first normal-use change at 1,200 hours, reflecting the break-in period during which new gear surfaces shed fine metallic particles into the fluid.
  • The initial service interval carries only a change specification, not a check specification, in contrast to the normal-use schedule which includes both a check and a change interval. The fluid condition at break-in is addressed solely through the early drain rather than through an intermediate inspection.
  • Serial number ranges beginning at 55001 apply to the SAA4D95LE-5-A-equipped FD60-10, FD70-10, and FD80-10, while the 6D102E-based FD70-7 starts at serial 40001 and the S6D102E/SA6D102E-based FD70T-8 and FD80T-8 start at serial 46001. These serial thresholds define the production scope to which each specification applies.
  • The FD70T-8 and FD80T-8 use closely related but distinct engine designations — S6D102E and SA6D102E respectively — yet both share the 12.5-liter front differential capacity and identical service intervals, indicating the axle assembly is common across those two models.

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