Unimog (MB) 427

Additional Notes

• Across all listed Unimog (MB) 427 variants — the U 1000, U 1200, U 1250, U 1250 L, U 1400, U 1450, U 1600, U 1650, and U 1650 L — the power steering system capacity is 2.25 liters, a figure consistent with a service fill rather than a full overhaul volume.
• The 2.25-liter capacity applies uniformly regardless of the variant's load rating or designation suffix, indicating no differentiation in power steering system size across the 427 series lineup.
• The fluid change interval is specified as 2,400 hours or 24 months under normal use conditions, reflecting a dual-trigger schedule where whichever threshold is reached first would govern the service event.
• A 2,400-hour operational threshold is notable in the context of heavy-duty utility vehicles, where service intervals are tracked by engine hours rather than distance, as is standard for equipment used in agricultural, municipal, or off-road applications.
• The 24-month calendar limit runs parallel to the hour-based interval, meaning a vehicle accumulating low operational hours would still require a fluid change within two years.
• The U 1600, U 1650, and U 1650 L share the same 2.25-liter capacity and 2,400-hour/24-month interval as the lower-rated variants, despite carrying a higher numeric designation that typically corresponds to greater gross vehicle weight in the Unimog range.
• The U 1600 series within the 427 platform has a listed start year of 1992, placing its introduction four years after the 1988 start year of the U 1000, U 1200, U 1400, and U 1450 variants.
• All specifications listed apply under normal use conditions, which in heavy-duty vehicle service contexts is generally distinguished from severe use — such as extreme temperatures, sustained high loads, or frequent short-cycle operation — though no separate severe-use interval is present in the specifications for any of the listed variants.