Chevrolet LIGHT DUTY TRUCK (SERIES 10-35) Service Manual page 344

WHEEL USAGE AND TIRE LOAD LIMITS AT VARIOUS INFLATION PRESSURES*
W h e e l C o d e
R e g u la r R ally
zw
—
zw
—
zw
—
zw
—
zw
—
* Wheel load limits are shown below. Vehicle loading must be limited such that neither the wheel or tire load limits are exceeded.
W H E E L C O D E A N D L IM IT S
W h e e l Lim its
S ize of M a x . M a x .
C o d e
W h e e l L oad P res s.
(Lbs.) (P S I)
CF. BU
15 x 7 J J
1670
15 x J J 1910
BT, CK
8
CH 15 x JJ 1760
8
CB 15 x J J
1670
6
ZW
16.5 x 6.00 2680
CB 15 x J J 1670
6
ZR 16 x 5 K
1800
CC
15 x J J 1670
6
ZD 16 x 5 K 1800
ZY
19.5 x 6.00 2540
BW, ZC
15 x J J 2030
8
gutter, pull one tool toward center of rim.
2. Hold one iron in position with foot and pull second
iron toward center of rim. Progressively work bead off rim,
taking additional bites if necessary.
3. Stand assembly in vertical position. Lubricate second
bead. At top of assembly insert straight end of tire iron
between bead and back flange of rim at about a 45 degree
angle.
4. Turn iron so that it is perpendicular to rim. Pry
second bead off.
Mounting
All tubeless tires will be mounted as follows:
1 . Inspect rim to insure bead seats are clean and
smooth. Then place rim on floor with wide side down and
lubricate first bead of tire and upper bead seat of rim.
2. Push first bead into well of rim and onto rim as far
as possible. Using straight end of tire iron and with stop
resting on rim flange, work remaining section of first bead
over rim.
3. Hold second bead in well by standing on tire. When
necessary, push section of bead into rim well and anchor
with vise-grip pliers by pinching pliers on rim flange. Using
spoon end of tire iron with stop toward rim, work
progressively around bead using small bites until bead slips
over flange onto rim base. If necessary, insert second tire
iron and lubricate last
of bead before completing.
6"
4. Check valve to be certain that hex nut at the valve
base is tight. Inflate tire to recommended operating
pressure. Check assembly for air leaks.
TIRES FOR LIGHT TRUCKS USED IN HIGHWAY SERVICE (Cont'd.)
W ID E B A S E T U B E L E S S T IR E S U S E D A S D U A L S
T ire Lo a d
S ize R a n g e
8.00-16.5 C 1195
8.00-16.5 D 1195
8.75-16.5 C 1380
8.75-16.5 D 1380
8.75-16.5 E 1380
W h e e l L im its
S ize of M a x .
C o d e
W h e e l Load
(L b s.)
ZK
40 16.5 x 6.00 2350
16.5 x 6!75
40 ZJ 3170
40 ZF 16 x V L 2780
6 2
ZH
55 16.5 x 8.25 2750
XW
85 15 x J J 1910
6
55 XX 15 x J J 2040
6
ZT
55 19.5 x 6.00 2780
ZX
55 16 x KS 2440
6
55
80
40
Fig. 3E-8--Tire/W heel Load and Infla tion Pressure 5 of 7
T ire L o a d L im its at V a rio u s In fla tio n P re s s u re s
30 35 40 45
1310 1415
1520
1310 1415 1520 1620
1515 1630
1750
1515 1630
1750 1855
1515 1630 1750 1855
M a x .
P res s.
(P S I)
70
85
85
70
Location For:
70
• Maximum Load
70
• Maximum Pressure
95
• Wheel Code and "Radial" Stam ps
75
• Wheel Size Stamps
RADIAL TIRES
Recommended truck tire mounting and inflation
procedures are especially important with radial truck tires.
Failure to follow these recommendations can cause bead
deformation in both tube type and tubeless tires due to
incorrect bead seating. Bead deformation may lead to
chafing, lower sidewall and bead area cracking, demounting
difficulties, eccentric wear,
retreadable casing.
Mounting
To insure correct mounting and bead seating and to
prevent bead deformation, the following steps must be
taken:
A. Tube Type Tires
1. Only use rims approved for radial tire usage by rim
manufacturer. Thoroughly clean rim parts, removing all
rust and other foreign material. Make sure rim parts match
and are not sprung or broken.
2. Thoroughly lubricate tire beads, portion of tube
between beads, and flaps with an approved rubber lubricant.
Radial tubes are identifiable by the letter "R" in the size
designation. Example 100R20. Also, to further identify the
radial tube, a red band on the valve stem has been required
since March, 1975. Radial flaps are also identified by the
letter "R". Example - 20R8.
CAUTION: Do not use silicone base
lubricants - this could cause the tire to slip
on the wheel.
WHEELS AND TIRES
(P S I)
50 55 60 65
1710
1800
1970
2070
1970 2070 2175 2260
Optional Location
ride vibration and non-
LIGHT TR U CK SER V IC E MANUAL
3E-7
70 75
2360