Chevrolet LIGHT DUTY TRUCK (SERIES 10-35) Service Manual page 342

W HEEL USAGE AND TIRE LOAD LIM ITS AT VARIOUS INFLATION PRESSURES"1
Wheel Code
Regular
Rally/Spoke
B S CT, BM
ZK. Z J —
ZK. Z J
-
ZK Z J
-
Z J —
ZJ -
Z J
-
Z H
-
* Wheel load lim its are shown on page 5-29.
• The tires should be in good condition and properly
mounted with the balance mark on the tire, if any, lined up
with the valve.
• Bent wheels that have runout over 1/16" should be
replaced.
• Inspect tire and wheel assembly to determine if an
eccentric or out-of-round condition exists. Note that this
condition, if severe, cannot be "balanced out". An assembly
which has an out-of-round condition exceeding 3/16" on
tire sizes through 19.5" is not suitable for use on the front
of the vehicle. Its use on the rear should be governed by its
general condition and whether the roundness defect
seriously detracts from overall ride quality.
• When balancing wheels and tires, it is recommended
that the instructions covering the operation of the wheel
balancer being used be closely followed.
• When balancing truck type nylon tires, tires must be
hot (run for several miles) before raising vehicle to balance
so that flat spot is elimated. A tire which is flat spotted will
be incorrectly balanced.
WHEEL INSTALLATION
Single Wheels
When installing the tire and wheel on the vehicle, the
following procedure should be followed:
After wheel nuts are put on loosely, turn the wheel
until one nut is at the top of the bolt circle; tighten the nut
just snug. Snug up the remaining nuts criss-cross to
minimize runout, then tighten the nuts to the recommended
torque alternately and evenly to avoid excessive runout.
TIRES FOR LIGHT TRUCKS USED IN HIGHWAY SERVICE (Cont'd.)
WIDE BASE TUBELESS TIRES USED AS SINGLES
Tire
Load
Size Range 20
10-15 B 1390
30
8.00-16.5 C 1360
8.75-16.5 C 1570
8.75-16.5 D
1570
8.75-16.5 E
1570
9.50-16.5 D 1860
9.50-16.5 E 1860
10-16.5 D 1840
V ehicle loading must be lim ited such that neither the wheel or tire load lim its are exceeded.
________________________________________________________________________________________ I
Fig. 3 E -6 -T ire /W h e e l Load and Infla tion Pressure 3 of 7
Tire Load Limits at Various Inflation Pressures
22 24 26 28
1470 1540 1620 1690
35 40 45 50
1490 1610
1730
1720 1850 1990
1720 1850 1990 2110
1720 1850 1990 2110
2030 2190 2350 2500
2030 2190 2350 2500
2010 2170 2330 2480
...
...
Dual Wheels
When installing wheels on vehicles with dual rear
wheels:
1 . Install inner and outer wheel and clamp ring on rear,
or wheel and clamp ring on front (be sure pins on clamp
ring face outboard).
2. Install and snug nuts finger tight.
3. Torque nuts to specified torque in sequence shown
in Fig. 3E-11 .
Lateral runout should not exceed 1/8" on front wheel
or 3/16" on rear wheel.
Attachment of Dual Wheels On P300 Models
To assure secure attachment of the dual disc wheeis,
it is important that all dirt or rust scale be removed from
the mating surface of the wheels, hub, and clamp ring as
well as the stud and nut. POWER D RIV E NUTS THEN
M A N U ALLY INSPECT TORQUE AT 130-180 FT. LBS.
M ANU AL TORQUE ONLY: 150-200 FT. LB.
Side and Lock Rings
Side and lock rings of different rim types are not
interchangeable. Some may appear to be, but they do not
fit peoperly on the rim base. Serious accidents have resulted
from the use of mismatched rings. Rim base and rings must
be matched according to manufacturer, size and type. This
information is stamped on each part.
WHEELS AND TIRES
( P S I )
30 32 34 36
1760
55 60 65 70
2240 2350
2350 2470 2570
2240
2650 2780
2650 2780 2920 3050
2620 2750
LIGH T T R U C K SER V IC E MANUAL
3E-5
38
75
2680
3170