Caterpillar Forklift trucks, diesel

Additional Notes

• The Caterpillar diesel forklift truck lineup covered here spans three configurations, each pairing a specific engine with a torque converter-type automatic transmission.
• A torque converter transmission relies on fluid both as a hydraulic medium for power transfer and as a lubricant, which is why fill capacities in such systems tend to run higher than in conventional gear-only automatic units.
• The DP50K with the Mitsubishi S6S engine carries a transmission fluid capacity of 15 liters under normal use conditions, reflecting the smaller displacement and lighter-duty class of that configuration.
• The DP80N and DP90N, both equipped with the Mitsubishi 6M60-TL engine, share an identical transmission fluid capacity of 23 liters under normal use conditions, representing a notably larger fill volume consistent with the heavier-duty class of those models.
• The 8-liter difference between the DP50K and the 6M60-TL-equipped models indicates a substantially larger transmission assembly in the DP80N and DP90N, which is typical when moving into higher-capacity lift truck classes.
• All three configurations specify normal use conditions, meaning the listed capacities and any associated service intervals apply to standard operating environments rather than severe-duty cycles.
• The DP80N and DP90N share not only the same engine but also the same 23-liter transmission fluid capacity, suggesting the two models use the same or closely related transmission hardware despite being distinct truck configurations.