Komatsu Rigid backhoe loaders, WB

Differential fluid capacity & service interval

Komatsu Rigid backhoe loaders, WB use differential fluid with a capacity range of 8,2 to 18,5 liters. The data covers 2 configurations.

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

TypeSpecifications
  • WB93R-2, Komatsu S4D106-2SFA (1999-2005)
  • Front
  • Use: Normal
  • Capacity 8,2 liter
  • WB93R-2, Komatsu S4D106-2SFA (1999-2005)
  • Rear
  • Use: Normal
  • Capacity 18,5 liter

Additional Notes

  • The front differential of the Komatsu WB93R-2 with S4D106-2SFA engine carries a fluid capacity of 8.2 liters, a relatively modest volume consistent with the lighter load demands typically placed on a front axle differential in a backhoe loader configuration.
  • The rear differential on the same machine holds 18.5 liters, more than double the front differential capacity, reflecting the greater mechanical load and torque distribution responsibility assigned to the rear axle in this drivetrain layout.
  • Both the front and rear differential fluid capacities listed apply under normal use conditions, meaning the intervals and fill volumes are not adjusted for severe-duty operating environments in the specifications provided for the 1999-2005 model years.
  • The combined differential fluid volume across both axles totals 26.7 liters, a figure relevant when planning a full drivetrain fluid service on the WB93R-2, as each differential is serviced as a separate system with its own distinct capacity.

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