Frequent Low-speed Operation, Consistent Heavy Traffic Less
than 25 mph (40 km/h) or Long Rush-hour Traffic
Every 60000 miles
(96000 km)
Change transfer case fluid (4WD vehicles).
Every 60000 miles
(96000 km) or 2400
engine hours
Flush and refill engine coolant. Do not add
engine coolant additive.
Note:
When adding coolant additive, do not exceed the specified
maximum of 48 fluid ounces (1.4 liters). Operating the engine with
excessive coolant additive may cause overheating which could lead to
severe permanent engine damage.
Note:
After initial coolant flush and fill at 60000 miles
(96000 kilometers) or 2400 engine hours, flush and fill every 45000 miles
(72000 kilometers) or 1800 engine hours thereafter.
Sustained High-speed Driving at Gross Vehicle Weight Rating
(Maximum Loaded Weight for Vehicle Operation)
As required
Change engine oil and filter as indicated by
the information display and perform services
listed in the scheduled maintenance chart.
Every 15000 miles
(24000 km), six
months, 600 engine
hours or as indicated
by the information
display
Replace engine- and frame-mounted fuel
filters.
Every 15000 miles
(24000 km) or 600
engine hours
Inspect concentration (freeze-point
protection) and additive (corrosion inhibitor)
strength. Add engine coolant additive if
required.
Every 30000 miles
(48000 km)
Replace wheel bearing grease and grease seals
if non-sealed bearings are used (2WD
vehicles).
Scheduled Maintenance
83
2013 Diesel
(67l)
Supplement, 1st Printing
USA
(fus)
