Chevrolet CHEVY VAN G10 SERIES Service Manual page 292

WHEELS A N D TIR ES 10-2
Load Ply
Tire
Range Rating
Size
7 .0 0-1 4
C
7 .0 0-1 4 D
8 .0 0 -1 6 .5 C
8 .7 5 -1 6 .5 C
8 .7 5 -1 6 .5 D
8 .7 5 -1 6 .5 E 10
pounds per square inch over th e recom m ended pressures
up to a m axim um o f 32 pounds per square inch cold for
load range B tires, or 40 pounds per square inch cold for
load range D tires. Sustained speeds above 75 m ph are
n o t recom m ended w hen the 4 pounds per square inch
adjustm ent w ould require pressure greater than the m axi­
m um stated above.
3. For sustained high speed driving over 65 m ph, w ith truck
type tires, cold inflation pressures m ust be increased
psi. Above those specified in th e above table for the load
being carried. F or special operating conditions . . . such
as cam pers or other high center o f gravity loading
vehicles . . . cold inflation pressures m ay be increased up
to 10 psi. The total increase in cold inflation pressures
10
shall n o t exceed psi above those specified in the above
table for the load being carried.
4. Cold tire inflation pressure: after vehicle has been
inoperative for 3 hours or m ore or driven less than 1
JACKING INSTRUCTIONS
The following chart will assist in perform ing w heel and tire
changes using vehicle jacks supplied with or recom m ended for
use.
Jacking P oin t on V ehicle
Model
Front
Behind B u m p er-
Chevy Van or
U nder L ow er C ontrol
Sportvan
Arm Pivot Bar
CPK 10 SERIES
Fig. 2 —Fron t Wheels and Attachm ents
TIRE LOAD AND IN FLA TIO N PRESSURE
TIRES FOR LIG H T TRUCKS USED IN HIGHW AY SERVICE
W ID E BASE T U B E L E S S T IR E S U S E D A S S IN G L E S
30 35
40
10 30 1130
6 1220
8 10 30 1130 1220
6 1360 1490 1610
6 1570 1720 1850
8 1570 1720 1850
15 70 17 20 18 50
SERVICE OPERATIONS
Rear
Behind B u m p e r -
Under Rear A xle
Close to Wheel
C20-30 SERIES
T ire Load Lim its at Various In flation Pressures
45 50 55
13 10
1310 1390 1470
1730
1990
21 10
1990 22 4 0
2 1 1 0
1990 2 2 4 0
mile. H ot tire inflation pressure: after vehicle has been
10
driven miles or at speeds o f more th an 60 miles per
hour.
5. Loads should be distributed as evenly as possible in the
cargo area.
6
. Vehicles w ith luggage racks do n o t have a vehicle load
lim it greater th an specified.
10
7. When tow ing trailers, the additional load on the axle
induced by the trailer tongue load m ust n o t cause the
axle load to exceed th e lim its stam ped on the GVW plate.
Tire inflation pressures m ust be adjusted accordingly.
8
. M axim um load m ust n o t exceed the m axim um tire load
lim it as indicated by the underscoring in th e table.
M inim um recom m ended cold inflation pressures for
various loads m ust conform to the table.
Wheel Nut Torques (See Specifications)
10-30 Series Vans
On a new vehicle or after the w heel has been changed, the
wheel n u t torque m ust be checked at
6,000
miles and every
Correcting Irregular Tire Wear
Heel and Toe Wear— This is a saw -toothed effect where one
end o f each tread block is w orn m ore than the other.
The end th a t wears is th e one th a t first grips the road w hen
the brakes are applied.
Heel and toe wear is less noticeable on rear tires than on
fro n t tires, because the propelling action o f the rear wheels
creates a force w hich tends to wear the opposite end o f the
tread blocks. The tw o forces, propelling and braking, make for
m ore even wear o f the rear tires, whereas only the braking
forces act on the fro n t wheels and th e saw -tooth effect is m ore
noticeable.
A certain am o u n t o f heel and toe wear is norm al. Excessive
wear is usually due to high speed driving and excessive use of
brakes. The best rem edy, in ad d itio n to cautioning th e owner
on his driving habits, is to inter-change tires regularly.
7 0
60 65
1 5 5 0
2 3 5 0
24 7 0 2 5 7 0
2 3 5 0
100 1,000
,
miles thereafter.
C H E V Y V A N SH O P M A N U A L
75
26 80
6,000
and