Komatsu Backhoe loaders, WB

Coolant capacity & service interval

Komatsu Backhoe loaders, WB use coolant with a capacity range of 14 to 15 liters. Service intervals include checking at 8 to 10 hours and changing at 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 15 liter
  • Check 10 hours
WB97S-5, Komatsu SAA4D104E-1 Tier 3 (2009-2017)
  • Use: Normal
  • Capacity 14 liter
  • Check 8 hours
  • Change 2000 hours
WB97S-5, Komatsu S4D104E-3 Tier 2 (2006-2017)
  • Use: Normal
  • Capacity 15 liter
  • Check 8 hours
  • Change 2000 hours
WB97R-5, Komatsu SAA4D104E-1 (2005-2017)
  • Use: Normal
  • Capacity 15 liter
WB97R-2, Komatsu S4D106-2SFA (1999-2005)
  • Use: Normal
  • Capacity 15 liter
  • Change 2000 hours
WB98A-2, Komatsu S4D106-1FC (1999-2005)
  • Use: Normal
  • Capacity 14 liter

Additional Notes

  • Across the WB-series backhoe loaders, cooling system capacities fall into two values: 15 liters and 14 liters. The 14-liter figure appears in the WB98A-2 with the S4D106-1FC engine and in the WB97S-5 paired with the SAA4D104E-1 Tier 3 engine, while the remaining configurations all share the 15-liter capacity.
  • The WB93R-5 with the Komatsu SAA4D104E-1 engine (serial number F52884 onward) carries a coolant check interval of 10 hours. A 10-hour interval corresponds to a daily or pre-shift inspection frequency, reflecting routine monitoring rather than a fluid exchange.
  • The WB97S-5 with the S4D104E-3 Tier 2 engine specifies both a check interval of 8 hours and a change interval of 2000 hours. The 8-hour check aligns with a standard daily service cycle, while the 2000-hour change interval represents a long-term drain-and-refill schedule.
  • The WB97S-5 fitted with the SAA4D104E-1 Tier 3 engine shares the same 8-hour check and 2000-hour change intervals as the Tier 2 variant of the same model, despite carrying a slightly lower capacity of 14 liters versus 15 liters.
  • The WB97R-2 with the Komatsu S4D106-2SFA engine, covering 1999-2005, specifies a 2000-hour coolant change interval alongside a 15-liter capacity. No periodic check interval is listed for this configuration, distinguishing it from later WB97S-5 entries that include explicit check intervals.
  • The WB97R-5 with the SAA4D104E-1 engine, spanning 2005-2017, lists only a 15-liter capacity with no check or change interval specified in the row data. This contrasts with other configurations in the same series that carry defined service interval figures.
  • The WB98A-2 with the S4D106-1FC engine, covering 1999-2005, lists only a 14-liter capacity with no interval data present. The S4D106-1FC and S4D106-2SFA engines appear in the two earliest model year ranges within the dataset, both spanning 1999-2005.

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