PART 8: MAINTENANCE AND SERVICE
PB1319 (CAT. NO. 5296 ) —135— 22-01691 (R02/02)
Wheels
Hub Pilot Mount Ball Seat Mount
Hub, Drum, and Stud Assembly
Wheels
Wheel Nuts
The hub pilot mounting system
uses M22x1.5 metric threads
(about 7/8 in. dia.). The stud
stands out at least 1.9 in. beyond
the brake drum. All studs are right
hand threads. Pilot bosses
machined on the hub fit tightly to
the wheel center bore.
The ball seat mounting uses 3/4 x
16 or 1-1/8 x 16 threads. The dual
mounting studs provide 1.3 - 1.44
in. standout. Right hand and left
hand threads are required. Inner
and outer cap nuts center the
wheels by seating against wheel
ball seats.
Pilot mount wheels have stud
holes that are reamed straight
through (no ball seats). Center
bore diameter is 8-21/32 in. Budd
Uni-Mount -10 wheels have UNI-
MOUNT stamped on the disc.
Ball seat wheels have spherical
chamfers machined on each stud
hole. Center bore diameter is 8-
23/32 in.
Nut has a hex body and a flange
for clamping against wheel face.
Hex size is 33 mm (same as 1-5/16
in.).
Inner and outer cap nuts mate with
spherical chamfers on wheels.
Inner nut has 13/16 in. square end.
Outer nut has 1-1/2 in. hex.
WARNING! Mismatched wheel components are danger-
ous. Equipment that does not exactly match original
specifications or that is mismatched could cause your
wheels to break and separate from the vehicle. The
resulting accident could be very serious. Each mount-
ing system is engineered for use only with its correct
mating part. Be sure properly matched components are
used for each type of mounting.
02949
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