Specifications

The front wheel bearings require lube every 12,000 miles with high-temperature grease – really.
Check the bearings by raising the motorhome and supporting it at the front lower control arm
on each side. Now you can spin the wheel and check for noise or roughness. To check for tight
or loose bearings, grip the tire at the top and bottom and move the wheel assembly in and out
on the spindle. If hub assembly movement is less than .001 inch (too tight) or more than .005
inch (too loose), adjustment is needed.
The adjustments steps are:
1. Remove the hub cap or wheel disc from the wheel.
2. Remove the dust cap from the hub.
3. Remove the cotter pin from the spindle and spindle nut.
4. Tighten the spindle nut to 12 ft. lbs. while turning the wheel assembly forward by hand to
fully seat the bearings. This will remove any grease which could cause excessive wheel
bearing play later.
5. Back off the nut to the “just loose” position.
6. Hand tighten the spindle nut. Loosen the spindle nut until either hole in the spindle lines up
with a slot in the nut (not more than ½ flat).
7. Install the new cotter pin. Bend the ends of the cotter pin against the nut. Cut off the extra
length to ensure that the ends will not interfere with the dust cap.
8. Measure the looseness in the hub assembly. There will be from .001 to .005 inch end play
when properly adjusted.
9. Install the dust cap on the hub.
10.Replace the wheel cover & hub cap.
Doesn't sound like something you can easily determine? Take it to a shop you trust.
http://users.sisna.com/cebula/P-Chassis-AlignmentProcess.pdf 9 Version 0.7 –Sep 14, 2005