Ford 2013 F-650 Owner's Manual page 280

Capacities and Specifications
Axle Model
RS-23–180/186
RS-23–240
RS-23–380
*
Oil capacities are for standard track axles that have been measured at
various common drive pinion angles. The quantities listed include enough
oil for both wheel ends. These capacities change if the track or the drive
pinion angle is different.
Power Steering
Note: Capacities may be increased if the vehicle is equipped with a
cooler. Always check to make sure the fluid level is in the acceptable
range.
Steering Gear
TAS40
TAS66
Air Conditioner Refrigerant
Note: This system uses mineral-based refrigerant oil to lubricate o-rings
and fittings.
This system uses r134a refrigerant and PAG-type refrigerant oil.
Torque the captured washer nut to 170–190 inch-pounds
(19–21 Newton-meters) after servicing.
Fuel Tanks
Standard tanks are listed as such. All other tanks available for your
vehicle are optional equipment.
Tank Type
Single, steel rectangular
2013 F-650/750 (f67)
Owners Guide gf, 2nd Printing, March 2013
USA (fus)
Meritor
Capacity - Pints (Liters)
47.3 (22.4)
37.4 (17.7)
63.6 (30.1)
Capacity - Pints (Liters)
17.6 (8.3)
18.4 (8.7)
Gasoline engine
Capacity - Gallons (Liters)
42 (159)
60 (227)
279
*