4
28
Dualed wheels,
steel inner/
aluminum outer
stud located ball
seat mounting
4-7
NOTICE: Do not exceed
maximum wheel load.
Customer must compare
OEM vehicle load rating
to maximum wheel
load rating.
Refer to tire manufacturer’s
recommendation for proper
tire pressure. Before
mounting the tire perform
a wheel fitment check
to insure proper clearance
from any obstructions.
DiscMate wheel spacers are recommended for use with Alcoa Dura-Bright
®
surface
treated wheels to protect the wheel contact surfaces from marring. DiscMate wheel
spacers are placed between the contact surfaces of the Dura-Bright
®
wheel and the
brake drum and between the steel and aluminum wheels as shown below.
Inner Steel Wheel
Drum
3/4” Stud
Hub
1.31” to 1.44”
Correct dual mounting for steel inner/aluminum outer stud located ball seat mount.
Outer Cap Nut
P/N 5996R or L
(See 4-2, page 24)
Inner Cap Nut
P/N 7896R or L
(See 4-2, page 24)
Alcoa Aluminum Wheel
DiscMate (when used)
WARNING Incorrect inner cap nuts used with steel wheels can bottom out
on the unthreaded portion of the stud before the wheels are properly seated.
Improperly seated wheels can run loose, cause stud breakage and disengage
from the vehicle which can cause serious injury or death. Loose running
wheels can lead to stud breakage.
Use only cap nut 7896R or L or its equivalent when mounting steel
inner duals.
WARNING Inadequate wheel support surface can lead to stud hole-to-stud
hole fracture resulting in separation of the outer disc and rim from the vehicle.
Separation of the wheel from the vehicle can cause injury or death.
Alcoa aluminum wheels with 11-1/4" diameter bolt circle require a support
surface at least 13-3/16" in diameter. Check the outer support surface
of the inner steel wheel for flatness and adequate diameter before installing
the outer wheel. When the wheels are serviced, check the mounting surfaces
of both wheels for stud hole to stud hole cracks. If cracks are found,
remove the wheel from service. For the support surface diameter required
by other bolt circle sizes, ask your Alcoa representative.
WARNING Use of two-piece flange nuts on ball seat wheels or ball seat
cap nuts on hub piloted wheels is dangerous.
Using the wrong cap nuts can cause loss of torque, broken studs and
cracked wheels, conditions which can lead to injury or death.
Use only hardware designed specifically for each wheel type. See 4-2, page
24 for proper hardware assemblies.
WARNING
WARNING
WARNING