Ford f-650 2013 Owner's Manual page 225

224
Changing the Fluid
See the Scheduled Maintenance chapter for rear axle lubricant change
intervals.
1. Drain the rear axle while the lubricant is warm.
2. Park the vehicle on level ground.
3. Set the parking brake and shift into position N or P (automatic
transmission), or first gear (manual transmission). Turn the engine off.
4. Clean any dirt from around the rear axle filler and drain plugs.
5. Remove the filler and drain plugs. Drain the lubricant into a suitable
container. Dispose of all used automotive fluids in a responsible manner
following your local authorized standards.
6. Clean and install the drain plug securely.
7. Add lubricant through the filler plug opening.
8. Clean and install the filler plug securely.
SPRING U-BOLT CHECKS
Check U-bolt nuts and re-torque every 36000 miles (60000 kilometers)
after initial 1000 mile (1600 kilometer) re-torque. The U-bolt and nut
threads and seats should be cleaned and lubricated to make sure peak
condition when re-torqued.
U-bolt Nut Torque
Suspension
Front axle – 8500 lb (3856 kg)
Front axle – 10000 lb (4536 kg) and higher
Rear axle with multi-leaf
Rear axle with IROS air suspension
Rear axle with Hendrickson air suspension
See air suspension U-bolt re-torquing and installation information below.
Air Suspension U-bolt Checks and Re-torquing Procedures
1. Inspect the threads of the U-bolt and nut for rust and debris. Clean
the threads if contaminated.
2. Using a torque wrench, determine if any nuts can be turned with a
force below the specified torque.
3. Using the lowest discovered torqued nut as a starting point,
re-tighten the nuts using the sequence listed under Air suspension
U-bolt and U-bolt nut installation.
2013 F-650/750 (f67)
Owners Guide gf, 1st Printing, October 2012
USA (fus)
Maintenance
180-200
260-300
260-300
370-400
400–450
ft-lb N•m
244-271
353-407
353-407
502-542
542–610