PART 8: MAINTENANCE AND SERVICE
PB1319 (CAT. NO. 5296 ) —138— 22-01691 (R02/02)
Your Vehicle’s Air System
CAP NUT TORQUE SPECIFICATIONS (R12/01)
WHEEL AND NUT
CONFIGURATION
STUD SIZE
TORQUES FOR INNER &
OUTER CAP NUTS
Lb. Ft. N.m
Stud-Piloted Disc
Wheels
3/4”-16 Inner
1 1/8”-16 Outer
450-500 610-680
Heavy Duty Stud-
Piloted Disc Wheels
15/16”-12 Inner
1 5/16”-12
Outer
750-900 1025-1225
PHP-10; Budd Uni-
Mount-10; WHD-8
M22 x 1.5-6H 450-500 610-680
Cast Spoke Wheel
Assembly
1/2” Dia.
5/8” Dia.
3/4” Dia.
Rim Clamp
Nut Torque
80-90 110-120
160-185 220-250
225-245 305-335
WARNING! Prior to the removal of any air system com-
ponent, always block and hold the vehicle by a secure
means other than the vehicle’s own brakes. Depleting
air system pressure may cause vehicle to roll. Keep
hands away from chamber push rods and slack adjust-
ers, they may apply as system pressure drops.
•
After completing any repairs to the air system, always
test for air leaks, and check the brakes for safe opera-
tion before putting the vehicle in service.
•
Never connect or disconnect a hose or line containing
air pressure. It may whip as air escapes. Never remove
a component or pipe plug unless you are certain all
system pressure has been depleted.
•
Never exceed recommended air pressure and always
wear safety glasses when working with air pressure.
Never look into air jets or direct them at anyone.
•
Never attempt to disassemble a component until you
have read and understood recommended procedures.
Some components contain powerful springs and
injury can result if not properly disassembled. Use
only proper tools and observe all precautions pertain-
ing to use of those tools.
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