Oil-lubricated Front Wheel Bearings
During normal vehicle duty cycle, the lubricant and air inside the
hub/wheel cavity expands and, if not vented, causes pressure build-up
that could cause accelerated seal wear. There are two venting methods
that can be used to prevent pressure build-up:
•a slit or small hole in the rubber check vent
•the window.
Over a period of time, if not routinely cleaned, a slight film of oil can
collect dirt around the rubber fill plug and face, which could appear to
be a leak. Routine cleaning makes sure that the lubricant level can be
easily observed through the window as intended. In situations where the
window is clean on the outside but discolored on the inside, the
lubricant level may be checked by inserting a finger through the rubber
check vent hole.
The specified lubricant level for a window-type hubcap is from the
minimum line to 5/16 inch (8 millimeters) above the minimum line. If the
lubricant level should suddenly drop dramatically below the minimum
level, see theWorkshop Manualfor diagnostic procedure.
Installation, Tightening and Alignment
Make sure the threads on the studs and nuts are clean to permit correct
torque when installing wheels. The mounting surfaces of rims, wheels,
spacer rings and clamps must be free of dirt, rust, lubricants or damage.
Use a wire brush to clean the mounting contact surfaces. Do not use
lubricant on threads.
Check the rim or wheel for proper alignment after it has been properly
tightened. Rotate the wheel with a piece of chalk attached to a steady,
firm surface, and placed to just barely clear the outside surface of the
tire bead seat; this procedure points out the high spot. A high spot does
not necessarily mean that the lug nuts have been unevenly tightened,
but could be the result of a bent wheel.
Use the following installation procedure:
1. Slide inner rear or front tire and wheel in position over studs and push
it back as far as possible. Use care so that the threads on the studs are
not damaged.
Wheels and Tires259
2013 F-650/750(f67)
Owners Guide gf, 2nd Printing, March 2013
USA(fus)
Observation Maintenance Operation
Cleaning the wiper blades with a
clean cloth and mild detergent and
washing with a cleaner does not
restore a clean wipe.Replace wiper blades.
Noisy or difficult to operate. Lubricate body lock cylinders.
Headlamp beams in wrong position
when vehicle operating loaded.Check headlamp alignment.
Windshield washers do not spray
when operated.Check windshield washer fluid
level. Add fluid if required.
1During maintenance and repair, protect the fuel tube and the hose
assemblies, power steering lines, and brake lines from external heat,
acids and abrasions that could damage them.
2Check for (free) linkage action and make sure that (return) spring force
is adequate to maintain pedal free play.
3Adjust, repair or replace, as required, with the same or equivalent parts.
Emissions Control System
WARNING:Because of high engine compartment and exhaust
system temperatures resulting from emissions equipment, do not
park, idle or operate your vehicle in dry grass or other dry ground
cover where the possibility of ground fire exists.
To make sure the emissions control systems operate effectively, you
should have the services listed in the maintenance schedule performed at
the specified time and mileage intervals. You should avoid running out of
fuel or turning off the ignition while the vehicle is in motion, especially
at high speeds.
Do not make unauthorized modifications to the engine or vehicle.
Modifications causing increased amounts of unburned fuel to reach the
exhaust system can significantly increase the temperature of the engine
compartment and the exhaust system.
Avoid driving your vehicle if it does not operate properly. If the engine
diesels (more than five seconds of engine run-on after shut-off), misfires,
surges, stalls or backfires, see your dealer. Be alert for fluid leakage, odor,
smoke, loss of oil pressure, or charge indicator or over temperature warning.
288Scheduled Maintenance
2013 F-650/750(f67)
Owners Guide gf, 2nd Printing, March 2013
USA(fus)
