Komatsu Backhoe loaders, WB

Differential fluid capacity & service interval

Komatsu Backhoe loaders, WB utilize differential fluid with a capacity range of 6,5 to 15 liters. Service intervals include checks at 250 hours and changes at 250 hours/6 months or 1000 hours. The data covers 16 configurations.

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

TypeSpecifications
  • WB93R-5, Komatsu SAA4D104E-1 (F52884 -) (2010-2017)
  • Front
  • Use: Normal
  • Capacity 7 liter
  • Check 250 hours
  • Change 1000 hours
  • WB93R-5, Komatsu SAA4D104E-1 (F52884 -) (2010-2017)
  • Rear
  • Use: Normal
  • Capacity 15 liter (+ hub reductions)
  • Check 250 hours
  • Change 1000 hours
  • WB97S-5, Komatsu SAA4D104E-1 Tier 3 (2009-2017)
  • Front
  • Use: Normal
  • Capacity 10,5 liter
  • Check 250 hours
  • Change 1000 hours
  • WB97S-5, Komatsu SAA4D104E-1 Tier 3 (2009-2017)
  • Front
  • Use: Initial service
  • Capacity 10,5 liter
  • Change 250 hours/ 6 months
  • WB97S-5, Komatsu SAA4D104E-1 Tier 3 (2009-2017)
  • Rear
  • Use: Normal
  • Capacity 10,5 liter
  • Check 250 hours
  • Change 1000 hours
  • WB97S-5, Komatsu SAA4D104E-1 Tier 3 (2009-2017)
  • Rear
  • Use: Initial service
  • Capacity 10,5 liter
  • Change 250 hours/ 6 months
  • WB97S-5, Komatsu S4D104E-3 Tier 2 (2006-2017)
  • Front
  • Use: Normal
  • Capacity 10,5 liter
  • Check 250 hours
  • Change 1000 hours
  • WB97S-5, Komatsu S4D104E-3 Tier 2 (2006-2017)
  • Front
  • Use: Initial service
  • Capacity 10,5 liter
  • Change 250 hours/ 6 months
  • WB97S-5, Komatsu S4D104E-3 Tier 2 (2006-2017)
  • Rear
  • Use: Normal
  • Capacity 10,5 liter
  • Check 250 hours
  • Change 1000 hours
  • WB97S-5, Komatsu S4D104E-3 Tier 2 (2006-2017)
  • Rear
  • Use: Initial service
  • Capacity 10,5 liter
  • Change 250 hours/ 6 months
  • WB97R-5, Komatsu SAA4D104E-1 (2005-2017)
  • Front
  • Use: Normal
  • Capacity 7 liter
  • Change 1000 hours
  • WB97R-5, Komatsu SAA4D104E-1 (2005-2017)
  • Rear
  • Use: Normal
  • Capacity 15 liter
  • Change 1000 hours
  • WB97R-2, Komatsu S4D106-2SFA (1999-2005)
  • Front
  • Use: Normal
  • Capacity 6,5 liter
  • Change 1000 hours
  • WB97R-2, Komatsu S4D106-2SFA (1999-2005)
  • Rear
  • Use: Normal
  • Capacity 14,5 liter
  • Change 1000 hours
  • WB98A-2, Komatsu S4D106-1FC (1999-2005)
  • Front
  • Use: Normal
  • Capacity 10,5 liter
  • Change 1000 hours
  • WB98A-2, Komatsu S4D106-1FC (1999-2005)
  • Rear
  • Use: Normal
  • Capacity 9 liter
  • Change 1000 hours

Additional Notes

  • The Komatsu WB93R-5 rear differential holds 15 liters, with the specification noting that hub reductions are included in that figure. A combined capacity of this kind reflects a service fill measurement that accounts for the entire rear axle assembly rather than the differential housing alone.
  • The WB97R-2, powered by the S4D106-2SFA engine and covering 1999-2005, carries a front differential capacity of 6.5 liters and a rear differential capacity of 14.5 liters. Both figures are slightly lower than the corresponding capacities on the later WB97R-5, which specifies 7 liters front and 15 liters rear.
  • The WB98A-2 rear differential capacity of 9 liters is notably lower than the front differential capacity of 10.5 liters on the same machine. A rear differential holding less fluid than the front is atypical and reflects a difference in axle design or housing size between the two ends of the machine.
  • Across the WB97S-5 configurations, both the Tier 2 S4D104E-3 engine variant (2006-2017) and the Tier 3 SAA4D104E-1 engine variant (2009-2017) share identical front and rear differential capacities of 10.5 liters each, along with the same check and change intervals.
  • The WB97S-5 front and rear differentials both carry an initial service change interval of 250 hours or 6 months, whichever comes first. This early change interval applies to both the Tier 2 and Tier 3 engine variants and is separate from the standard 1000-hour normal service interval. An initial service change is typically specified to remove metal particles and contaminants generated during the break-in period of new components.
  • The WB93R-5 front differential specifies a 250-hour fluid level check interval in addition to the 1000-hour change interval. The WB97R-2 and WB97R-5 front and rear differential specifications do not include a separate check interval, listing only the 1000-hour change interval.
  • The WB97S-5 front differential capacity of 10.5 liters is notably higher than the 7-liter front differential capacity of the WB97R-5, despite both models sharing the SAA4D104E-1 engine in their respective later configurations. The difference reflects a variation in axle design between the two model lines rather than engine specification.
  • All differential fluid change intervals across the WB93R-5, WB97R-2, WB97R-5, WB97S-5, and WB98A-2 are set at 1000 hours under normal use conditions, establishing a consistent standard service interval across the WB backhoe loader range covered by these specifications.

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