User Manual

Hub-piloted mountings use M22 x 1.5 metric threads (about 7/8 in.
diameter). The stud stands out at least 1.94 in. beyond the brake
drum. All studs are right-hand threads. Pilot bosses (machined
surfaces) on the hub, fit tightly to the wheel center bore.
Ball-seat (stud-piloted) mountings use 3/4x16 or 1-1/8x16 threads.
The dual mounting studs provide 1.30 in. 1.44 in. standout. Right-
hand and left-hand threads are required. Inner and outer wheel
nuts center the wheels by seating against wheel ball seats.
Wheels
Hub-piloted wheels have stud holes reamed straight through (no
ball seats). Center bore diameter is 8-21/32 in.
Ball-seat wheels have spherical chamfers machined on each stud
hole. Center bore diameter is 8-23/32 in.
Wheel Nuts
Hub-piloted wheel nuts have a hex body and a flange for clamping
against wheel face. Hex size is 1-5/16 in. (33 mm).
Ball-seat inner and outer wheel nuts mate with spherical chamfers
on wheels. The inner nut has 13/16 in. square end. The outer nut
has a 1-1/2 in. hex.
Transmission Maintenance
See the transmission manufacturer's
operator's manual for lubrication
specifications and service intervals.
CAUTION
When adding oil, types and brands of
oil
should not be intermixed because
of possible incompatibility, which could
decrease the effectiveness of the lubri-
cation or cause component failure.
Vehicles configured with Eaton Automated
or a P
ACCAR transmission must maintain
the oil coalescing desiccant cartridge of the
air dryer as part of transmission
maintenance.
CAUTION
Replace oil-coalescing desiccant air
dryer
cartridge every 1 year regardless
of mileage. Only use oil-coalescing
desiccant
replacement cartridge when
replacing. Failure to perform this main-
tenance task will void the PACCAR
Transmission warranty and may result
in expensive transmission damage.
Hydraulic Clutch
The clutch pedal position is factory set and
does not require adjustment.
MAINTENANCE - Transmission Maintenance
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