User's Manual

Date of Origin – 02/01/08

HUB MAINTENANCE

Check wheel studs for good condition – no stripped threads – no bent or loose studs. Replace

any broken or bent studs or studs with damaged threads. When a broken stud is replaced, the

stud on each side of it should be replaced at the same time. If more than two studs on the same

hub are broken, replace all of the studs. NOTE: Hub cap mounting bolts (6) torque 10 to 15 ft. -lbs

torque per bolt.

WHEELS AND RIMS

Check all wheel nuts for tightness. Wheel flange nuts should be torqued to 450 to 500 ft. lbs (dry).

Check all metal surfaces thoroughly while making tire inspections and during tire changes.

Look for:

• Excessive rust or corrosion build-up

• Cracks in the metal

• Bent flanges or components

• Loose, missing, or damaged nuts

• Bent or stripped studs.

• Incorrectly matched rim parts

Replace damaged components, making sure that replacements are made with proper sized and

type parts.

WARNING

EXCESSIVELY CORRODED OR CRACKED RIMS ARE DANGEROUS, PARTICU-

LARLY DURING REMOVAL. DEFLATE TIRES PRIOR TO REMOVAL OF RIMS AND

WHEELS FROM THE VEHICLE OR PERSONAL INJURY COULD RESULT.

HUB LUBRICANT

Check and maintain proper level of lubricant in hubs.

Hubs using oil lubricant will have clear hub windows and the oil level will be clearly visible. Be sure

the oil level is at the fill line noted on the hub window.

Hubs equipped with synthetic grease will retain the grease between the bearings and no lubricant

visual check is possible. Trailers equipped with this option will not have a clear hub window or a

fill plug.

Do not add oil to hubs equipped with synthetic grease lubricant. If mixing of lubricants occurs,

remove the lubricant and re-install the proper lubricant as soon as possible.