Ford F-650 2025 Owner's Manual page 343

Frequent Low-speed Operation, Consistent Heavy Traffic Under 25 mph (40 km/h) or
As required
Every 15,000 mi
(24,000 km), six months or
600 engine hours
Every 30,000 mi
(48,000 km) or 1200 engine
hours
Every 60,000 mi
(96,000 km) or 2400
engine hours
Note: When adding coolant additive, do not exceed the specified maximum of 47 fl oz
(1.4 L) for the engine and 20 fl oz (473 ml) for the secondary cooling system. Operating the
engine with excessive coolant additive may cause overheating which could lead to severe,
permanent engine damage.
Note: After the initial coolant flush and fill at 60,000 mi (96,000 km) or 2400 engine
hours, flush and fill every 45,000 mi (72,000 km) or 1800 engine hours thereafter.
2025 F-650/750 (TBC) , enUSA, Edition date: 202310, First-Printing
Scheduled Maintenance
Long Rush-hour Traffic
Change the engine oil and filter as indicated by the instru-
ment cluster display, and perform the services listed in the
scheduled maintenance chart.
Replace the engine-mounted and frame-mounted fuel
filters.
Inspect the coolant concentration, freeze-point protection
and additive, corrosion inhibitor strength. Add coolant
additive if necessary.
Flush and refill the coolant. Do not add coolant additive.
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