Komatsu Backhoe loaders, WB

Brake fluid capacity & service interval

Komatsu Backhoe loaders, WB use brake fluid with a capacity of 0,8 liter. Service intervals include checking every 50 hours and changing every 2000 hours. The data covers 6 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)
  • Use: Normal
  • Capacity 0,8 liter
  • Check 50 hours
  • Change 2000 hours
WB97S-5, Komatsu SAA4D104E-1 Tier 3 (2009-2017)
  • Use: Normal
  • Capacity 0,8 liter
  • Check 50 hours
  • Change 2000 hours
WB97S-5, Komatsu S4D104E-3 Tier 2 (2006-2017)
  • Use: Normal
  • Capacity 0,8 liter
  • Check 50 hours
  • Change 2000 hours
WB97R-5, Komatsu SAA4D104E-1 (2005-2017)
  • Use: Normal
  • Capacity 0,8 liter
  • Change 2000 hours
WB97R-2, Komatsu S4D106-2SFA (1999-2005)
  • Use: Normal
  • Capacity 0,8 liter
  • Change 2000 hours
WB98A-2, Komatsu S4D106-1FC (1999-2005)
  • Use: Normal
  • Capacity 0,8 liter

Additional Notes

  • Across all six configurations spanning the Komatsu WB backhoe loader series from 1999-2017, the hydraulic brake system capacity is uniformly 0.8 liter, a value consistent with a service fill rather than an overhaul quantity, reflecting the relatively compact reservoir volume typical of hydraulic brake circuits on this class of machine.
  • The WB93R-5 with the Komatsu SAA4D104E-1 engine (serial F52884 onward, 2010-2017) carries a 50-hour interval check alongside a 2000-hour change interval for the hydraulic brake fluid, placing routine level verification well within the early stages of normal operation cycles.
  • The WB97S-5 fitted with the S4D104E-3 Tier 2 engine (2006-2017) and the variant fitted with the SAA4D104E-1 Tier 3 engine (2009-2017) share identical brake fluid specifications: 0.8 liter capacity, a 50-hour check, and a 2000-hour change interval, despite the difference in engine emission tier.
  • The WB97R-2 with the S4D106-2SFA engine (1999-2005) and the WB97R-5 with the SAA4D104E-1 engine (2005-2017) both specify a 2000-hour change interval at 0.8 liter capacity, but neither row includes a periodic check interval, distinguishing them from configurations that carry the 50-hour check requirement.
  • The WB98A-2 with the Komatsu S4D106-1FC engine (1999-2005) lists only the 0.8-liter capacity for the hydraulic brake system, with no change or check interval specified in the row data.
  • The 2000-hour change interval, where listed, is applied under normal use conditions across all relevant configurations, meaning the interval is not adjusted for severe-duty operation in any of the rows presented.
  • The S4D106-series engines appear in the earlier WB97R-2 and WB98A-2 models covering 1999-2005, while the SAA4D104E-1 engine is associated with later WB97R-5, WB97S-5, and WB93R-5 configurations, reflecting a generational engine transition across the WB line during the mid-2000s.

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