Linde Forklift trucks, diesel (391 series)

Coolant capacity & service interval

Linde Forklift trucks, diesel (391 series) require coolant with a capacity range of 6 to 8 liters. Service intervals include a check at 10 hours and a change at 9000 hours. The data covers 4 configurations.

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

TypeSpecifications
H14D, 391-01 / VW BXT (2014- )
  • Use: Normal
  • Capacity 6 liter
  • Capacity 8 liter (+ heater)
  • Check 10 hours
  • Change 9000 hours
H16D, 391-01 / VW BXT (2014- )
  • Use: Normal
  • Capacity 6 liter
  • Capacity 8 liter (+ heater)
  • Check 10 hours
  • Change 9000 hours
H18D, 391-01 / VW BXT (2014- )
  • Use: Normal
  • Capacity 6 liter
  • Capacity 8 liter (+ heater)
  • Check 10 hours
  • Change 9000 hours
H20D, 391-01 / VW BXT (2014- )
  • Use: Normal
  • Capacity 6 liter
  • Capacity 8 liter (+ heater)
  • Check 10 hours
  • Change 9000 hours

Additional Notes

  • The Linde Forklift trucks, diesel (391 series) H14D, H16D, H18D, and H20D variants all share the same VW BXT engine and carry identical cooling system specifications, with a base capacity of 6 liters rising to 8 liters when an optional cab heater is installed.
  • The 2-liter difference between the standard and heater-equipped capacity figures reflects the additional coolant volume held within the heater core and its associated plumbing, which becomes part of the circulating cooling circuit.
  • A check interval of 10 hours is among the most frequent service points found in industrial equipment specifications, placing coolant level verification on par with daily or pre-shift inspection routines typical in forklift operation.
  • The coolant change interval of 9000 hours under normal use conditions is a long-life figure, consistent with modern extended-life antifreeze formulations that resist silicate depletion and corrosion inhibitor breakdown over extended service periods.
  • The separation between the 10-hour check interval and the 9000-hour change interval underscores that routine level monitoring and full system replacement serve distinct maintenance purposes, with the former addressing consumption or leakage and the latter addressing fluid degradation.
  • All four models in the 391-01 series share the same capacity and interval values regardless of their rated load capacity, which ranges across the H14D through H20D designations, indicating the VW BXT engine installation is consistent across the series.