TM-5-3805-254-14-P-2

TRUCK, DUMP, 20 TON, 6X4, ON-OFF HIGHWAY 71,000 GVW, IHC MODEL F-5070 (CCE)

TECHNICAL MANUAL; OPERATOR’S, ORGANIZATIONAL, DIRECT SUPPORT, GENERAL SUPPORT AND DEPT MAINTENANCE MANUAL (INCLUDING REPAIR PARTS INFORMATION AND SUPPLEMENTAL MAINTENANCE INSTRUCTIONS)

JUNE 1980

TM-5-3805-254-14-P-2 - Page 870 of 894

TRUCK SERVICE MANUAL

WHEELS, RIMS, TIRES

With the improvement in design of both wheel bolt

holes and mounting bolts or nuts the left-hand threaded

parts are no longer used and right-hand threaded parts

are used at all wheels.

To prevent loosening of wheel

bolts or nuts, cup-shaped depressions are formed in

wheel disc at the bolt holes so that when mating cup-

shaped nut or bolt is tightened, elastic pressure against

the nut or bolt together with thread friction prevents

loosening in service. For this reason wheel mounting

bolts, nuts and wheel bolt hole surface must not be

lubricated.

It is good practice to tighten wheel nuts daily during

the first 500 miles of service on new vehicles and

anytime wheels have been removed.

Regular inspection

periods should be established to assure keeping nuts

tightened.

ONE PIECE DROP CENTER HEAVY DUTY TUBELESS

TIRES (7.00-20 and Up)

The mounting or demounting of heavy duty tubeless

truck tires is accomplished in much the same manner as

light duty or passenger-car type tubeless tires.

Consequently, same precautions for protecting the

sealing edges of the tire beads and rims should be

observed.

Rims used are all of the one-piece drop-

center type whether they are integral with wheel (disc

type) or demountable (cast type).

Because heavier tires

are less flexible, it is suggested that the special tubeless

truck tire tools, which are available, be obtained.