Conmet Conventional - Page 49

45ConMet
8. Brake and Wheel Installation (continued)
Table A: Single Aluminum Wheel
Applications
Aluminum Wheels ALCOA Cap Nut No.
3/4-16" Threaded
Studs
5995R and 5995 L or
5554R and 5554L,
depending on
stud length
Table B: Single Steel Wheel
Applications
Steel Wheels BATCO Cap Nut No.
3/4-16" Threaded
Studs
13-3013R and
13-3013L
2. When installing the inner wheel
and tire assembly, verify the
inner nuts being used are
suitable for the application:
aluminum wheels, steel wheels,
brake drum thickness, etc.
Inner cap nuts must be deep enough to ensure the
stud will not bottom inside the nut and must be of
a conguration approved by wheel manufacturer.
CAUTION
!
3. Rotate the hub to bring a drum
pilot to the top (12 o’clock)
position (see gure 95).
Position the inner wheel and
tire assembly over the studs
against the drum.
37
106814a
DRUM
PILOT
Rotating the Drum Pilot to 12 o'Clock
FIGURE 95
4. Beginning in the 12 o’clock
position, install the inner cap
nuts by hand to ensure they
are not cross-threaded. Do not
tighten any nuts at this time.
5. Apply sufcient torque (about
50 ft-lbs) to the inner top cap
nut to draw the brake drum up
on the drum pilot and against
the hub and seat the ball seat
of the nut into the ball socket of
the wheel (see gure 96).
38
106815a
INNER CAP NUT AT
12 O’CLOCK POSITION
Tightening the Inner Cap Nuts
FIGURE 96
6. To properly center the wheel,
snug the remaining wheel nuts.
Verify the drum is in place over
the drum pilots (see gure 97).
39
105756a
6
8
1
10
3
5
4
9
7
2
10 Stud Tightening Sequence
FIGURE 97
7. Starting with the top nut rst
and using a staggered pattern,
torque the inner wheel nuts in
stages to 450-500 ft-lbs (see
gure 98). The last nut rotation
must be with a calibrated
torquing device.
40
106824b
Torquing the Innner Wheel Nuts
FIGURE 98
Use the appropriate nuts with the above
technique to install the front and outer dual
wheels. Follow your shop practice to locate the
valve stems.
NOTE
8. Install the outer wheel and
nuts and tighten to 450-500
ft-lbs (see gure 99). The last
nut rotation must be with a
calibrated torque device.
41
106824b
Torquing the Outer Wheel Nuts
FIGURE 99
9. Inspect the brake and wheel
installation by checking the
seating of the wheel(s) and
drum at the pilots and by
turning the wheel(s) and check
for any irregularity.
Excessive or inadequate wheel nut torque can
cause a failure of the wheel mounting system and
a wheel separation resulting in severe personal
injury or death and property damage. Always use
a device that measures the torque being applied.
After the rst 50-100 miles, retorque all the
nuts to 450-500 ft-lbs. Loosen the outer nuts to
retorque the inner nuts.
DANGER
!