Komatsu Rigid dump trucks, HD

Automatic transmission fluid capacity & service interval

Komatsu Rigid dump trucks, HD utilize automatic transmission fluid with capacities ranging from 102 to 368 liters. Service intervals occur every 1000 hours. The data covers 4 configurations.

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

TypeSpecifications
HD785-7, Komatsu SAA12V140E-3 Tier 2 (2006-2013)
  • Use: Normal
  • Capacity 368 liter (Dry fill)
  • Capacity 205 liter (Service fill)
  • Change 1000 hours
  • Code: 7/2
HD785-5, Komatsu SA12V140 (S/N 4085->) (2004-2005)
  • Use: Normal
  • Capacity 125 liter (Dry fill)
  • Capacity 102 liter (Service fill)
  • Change 1000 hours
  • Code: 7/1
HD465-7 (2002-2005)
  • Use: Normal
  • Capacity 190 liter (+ transmission)
HD605-7 (2002-2005)
  • Use: Normal
  • Capacity 190 liter (+ transmission)

Additional Notes

  • The HD465-7 and HD605-7 (2002-2005) share an identical torque converter fluid capacity of 190 liters, with the notation that transmission fluid is additional. The separate accounting of torque converter and transmission volumes is common in heavy equipment where the two circuits hold fluid independently and are serviced as distinct systems.
  • The 190-liter torque converter figure for the Komatsu HD465-7 and HD605-7 represents a combined circuit volume rather than a dry fill or service fill distinction, meaning no differential between overhaul and routine service quantities is specified for those rows.
  • The HD785-5 equipped with the Komatsu SA12V140 engine (serial number 4085 onward, 2004-2005) lists both a dry fill capacity of 125 liters and a service fill capacity of 102 liters for the automatic transmission. The 23-liter difference between the two reflects fluid retained in internal passages, the torque converter, and cooler lines during a standard drain, which is typical of large automatic transmissions where a full drain is not achieved without disassembly.
  • The HD785-7 with the Komatsu SAA12V140E-3 Tier 2 engine (2006-2013) carries a dry fill capacity of 368 liters and a service fill capacity of 205 liters for the automatic transmission. The 163-liter gap between dry and service fill on the HD785-7 is substantially larger than the equivalent gap on the HD785-5, reflecting a significantly expanded transmission and hydraulic circuit in the later model.
  • Both the HD785-5 (2004-2005) and the HD785-7 (2006-2013) share a 1,000-hour automatic transmission fluid change interval under normal use conditions. In heavy equipment operation, a 1,000-hour interval corresponds roughly to six months of continuous single-shift use, though actual elapsed time varies with operational intensity.
  • The service fill capacity of the HD785-7 at 205 liters alone exceeds the total torque converter capacity of the HD465-7 and HD605-7 at 190 liters, illustrating the scale difference between the HD785 series and the smaller HD465 and HD605 platforms.

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