Komatsu Forklift trucks, electric - Tusk BBX50 series, -6

Differential fluid capacity & service interval

Komatsu Forklift trucks, electric - Tusk BBX50 series, -6 differential fluid capacity is 8 liters. Service intervals include checks every 3 months or 600 hours, and changes at 1 month or 200 hours and 6 months or 1200 hours. The data covers 12 configurations.

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

TypeSpecifications
  • 400CBSGH-6, BBX (900001A ->)
  • + transferbox
  • Use: Normal
  • Capacity 8 liter
  • Check 3 months/ 600 hours
  • Change 6 months/ 1200 hours
  • 400CBSGH-6, BBX (900001A ->)
  • + transferbox
  • Use: Initial service
  • Capacity 8 liter
  • Change 1 months/ 200 hours
  • 400CBSH-6, BBX (090001A ->)
  • + transferbox
  • Use: Normal
  • Capacity 8 liter
  • Check 3 months/ 600 hours
  • Change 6 months/ 1200 hours
  • 400CBSH-6, BBX (090001A ->)
  • + transferbox
  • Use: Initial service
  • Capacity 8 liter
  • Change 1 months/ 200 hours
  • 500CBSGH-6, BBX (900001A ->)
  • + transferbox
  • Use: Normal
  • Capacity 8 liter
  • Check 3 months/ 600 hours
  • Change 6 months/ 1200 hours
  • 500CBSGH-6, BBX (900001A ->)
  • + transferbox
  • Use: Initial service
  • Capacity 8 liter
  • Change 1 months/ 200 hours
  • 500CBSH-6, BBX (900001A ->)
  • + transferbox
  • Use: Normal
  • Capacity 8 liter
  • Check 3 months/ 600 hours
  • Change 6 months/ 1200 hours
  • 500CBSH-6, BBX (900001A ->)
  • + transferbox
  • Use: Initial service
  • Capacity 8 liter
  • Change 1 months/ 200 hours
  • 600CBSH-6, BBX (900001A ->)
  • + transferbox
  • Use: Normal
  • Capacity 8 liter
  • Check 3 months/ 600 hours
  • Change 6 months/ 1200 hours
  • 600CBSH-6, BBX (900001A ->)
  • + transferbox
  • Use: Initial service
  • Capacity 8 liter
  • Change 1 months/ 200 hours
  • 650CBSH-6, BBX (900001A ->)
  • + transferbox
  • Use: Normal
  • Capacity 8 liter
  • Check 3 months/ 600 hours
  • Change 6 months/ 1200 hours
  • 650CBSH-6, BBX (900001A ->)
  • + transferbox
  • Use: Initial service
  • Capacity 8 liter
  • Change 1 months/ 200 hours

Additional Notes

  • The differential fluid capacity across all listed Komatsu Tusk BBX50 series configurations — 400CBSGH-6, 400CBSH-6, 500CBSGH-6, 500CBSH-6, 600CBSH-6, and 650CBSH-6 — is 8 liters. This figure covers the combined differential and transfer box assembly, meaning the single fill volume services both units together rather than each separately.
  • An 8-liter combined capacity for a differential and transfer box assembly is a moderately substantial volume, consistent with the demands of industrial electric forklift drivetrains where the differential and transfer box share a common fluid circuit.
  • Under normal use conditions, the differential and transfer box fluid across all listed configurations is subject to a check interval of every 3 months or 600 hours, whichever comes first. The dual time-and-hour structure means the earlier of the two thresholds triggers the service action.
  • The normal-use fluid change interval is set at 6 months or 1200 hours across all configurations. At 1200 hours, the hour-based threshold aligns at exactly double the check interval of 600 hours, creating a structured two-check cycle between each full fluid change.
  • An initial service condition is specified separately for all configurations, requiring a fluid change at 1 month or 200 hours. This early change interval is standard practice for new or rebuilt drivetrains, as initial operation causes accelerated wear particle accumulation and fluid contamination from component break-in.
  • The initial service change at 200 hours represents one-sixth of the normal 1200-hour change interval, reflecting the significantly higher contamination rate expected during the early operational period of the differential and transfer box assembly.
  • The 400CBSH-6 begins at serial number 090001A, while the 400CBSGH-6 begins at 900001A. Despite the differing serial number sequences, both share identical 8-liter capacity and the same check and change intervals under both normal and initial service conditions.
  • The "G" designation differentiating the 400CBSGH-6 and 500CBSGH-6 from the 400CBSH-6 and 500CBSH-6 variants does not correspond to any difference in differential fluid capacity or service intervals within these specifications. Both G and non-G variants within the same tonnage class carry identical fluid service requirements.

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