Suzuki Grand Vitara JB416 / JB420. Manual — part 157

2D-2 Wheels and Tires:

WARNING

!

Do not mix different types of tires on the
same vehicle such as radial, bias and bias-
belted tires except in emergencies, because
handling may be seriously affected and may
result in loss of control.

The metric term for tire inflation pressure is the kilo
pascal (kPa). Tire pressures is usually printed in both
kPa and kgf/cm

2

on the “Tire Placard”.

Metric tire gauges are available from tool suppliers.
The chart, shown the table, converts commonly used
inflation pressures from kPa to kgf/cm

2

and psi.

Wheels Description

S5JB0A2401002

Wheel Maintenance
Wheel repairs that use welding, heating, or peening are
not approved. All damaged wheels should be replaced.

Replacement Wheels
Wheels must be replaced if they are bent, dented, have
excessive lateral or radial runout, air leak through welds,
have elongated bolt holes, if lug nuts won’t stay tight, or
if they are heavily rusted. Wheels with greater runout
than shown in the following may cause objectional
vibrations.
Replacement wheels must be equivalent to the original
equipment wheels in load capacity, diameter, rim with
offset and mounting configuration. A wheel of improper
size or type may affect wheel and bearing life, brake
cooling, speedometer / odometer calibration, vehicle
ground clearance and tire clearance to body and
chassis.

How to Measure Wheel Runout
To measure the wheel runout, it is necessary to use an
accurate dial indicator. The tire may be on or off the
wheel. The wheel should be installed to the wheel
balancer of the like for proper measurement.
Take measurements of both lateral runout “a” and radial
runout “b” at both inside and outside of the rim flange.
With the dial indicator set in place securely, turn the
wheel one full revolution slowly and record every reading
of the indicator.
When the measured runout exceeds the specification
and correction by the balancer adjustment is impossible,
replace the wheel. If the reading is affected by welding,
paint or scratch, it should be ignored.

Wheel Runout

Metric Lug Nuts and Wheel Studs
All models use metric lug nuts and wheel studs.

Metric lug nuts and wheel studs size
M12 x 1.25

If a broken stud is found, see “Front Wheel Hub, Disc,
Nut and Bearing Check in Section 2B”,
“Rear Wheel
Disc, Nut and Bearing Check in Section 2C”, “
Front
Wheel Hub Assembly Removal and Installation in
Section 2B” an
d/or “Rear Wheel Hub Assembly Removal
and Installation in Section 2C”, fo
r Note and
Replacement procedure.

Irregular and/or Premature Wear Description

S5JB0A2401003

Irregular and premature wear has many causes. Some
of them are as follows: incorrect inflation pressures, lack
of tire rotation, driving habits, improper alignment.
If the following conditions are noted, rotation is
necessary:
• Front tire wear is different from rear.
• Uneven wear exists across the tread of any tire.
• Both side of front tire wears are not even.
• Both side of rear tire wears are not even.
• There is cupping, flat spotting, etc.
A wheel alignment check is necessary if following
conditions are noted:
• Both side of front tire wears are not even.

kPa

kgf/cm

2

psi

bar

Conversion:
1 psi =
6.895 kPa
1 kgf/cm

2

=

98.066 kPa
1bar =
100 kpa

160

1.6

23

1.6

180

1.8

26

1.8

200

2.0

29

2.0

220

2.2

32

2.2

240

2.4

35

2.4

260

2.6

38

2.6

280

2.8

41

2.8

300

3.0

44

3.0

Lateral runout

limit

Radial runout

limit

Steel wheel

1.20 mm

(0.047 in.)

0.70 mm

(0.027 in.)

Aluminum wheel

0.30 mm

(0.011 in.)

0.30 mm

(0.011 in.)

I4RS0A240001-01

I2RH01240003-01

Wheels and Tires: 2D-3

• Wear is uneven across the tread of any front tire.
• Front tire treads have scuffed appearance with

“feather” edges on one side of tread ribs or blocks.

Wear Indicators Description

S5JB0A2401004

Original equipment tires have built-in tread wear
indicators (1) to show when they need replacement.
These indicators (1) will appear as 12 mm (0.47 in) wide
bands when the tire tread depth becomes 1.6 mm (0.063
in).
When the indicators (1) appear in 3 or more grooves at 6
locations, tire replacement is recommended.

Radial Tire Waddle Description

S5JB0A2401005

Waddle is side to side movement at the front and/or rear of the vehicle. It is caused by the steel belt not being straight
within the tire. It is most noticeable at a low speed, 8 to 48 kph (5 to 30 mph).
It is possible to locate the faulty tire by road testing the vehicle. If it is on the rear, the rear end of the vehicle shakes
from side to side or “waddles”. To the driver in the seat, it feels as though someone is pushing on the side of vehicle.
If the faulty tire is on the front, waddling is more visual. The front sheet metal appears to be moving back and forth and
the driver feels as though he is at the pivot point in vehicle.
Waddle can be quickly diagnosed by using Tire Problem Detector (TPD) and following the equipment manufacture’s
recommendations.
If TPD is not available, an alternative method of substituting known-good tire / wheel assemblies can be used as
follows, although it takes a longer time.

1) Ride vehicle to determine whether the front or rear waddles.
2) Install tires and wheels that are known to be good (on similar vehicle) in place of those on waddling end of vehicle.

If waddling end cannot be identified, substitute rear ones.

3) Road test again. If improvement is noted, reinstall originals one at a time till waddle causal tire is found. If no

improvement is noted, install known-good tires in place of all four. Then reinstall originals in the same manner.

[A]: Hard Cornering, under inflation or lack of tire rotation
[B]: Incorrect wheel alignment, tire construction not uniform or wheel

heavy acceleration

I3RH0A240002-01

I2RH01240005-01

I2RH01240006-01

2D-4 Wheels and Tires:

Equipment manufacture’s recommendations

Radial Tire Lead / Pull Description

S5JB0A2401006

“Lead / Pull” is the deviation of the vehicle from a straight
path on a level road even with no pressure on the
steering wheel.
Lead is usually caused by the following conditions.
• Improper tire and wheel alignment.
• Uneven brake assemblies.
• Tire construction.
The way in which a tire is built can produce lead in a
vehicle. An example of this is placement of the belt. Off
center belts on radial tires can cause the tire to develop
a side force while rolling straight down the road. If one
side of the tire has a little larger diameter than the other,
the tire will tend to roll to one side. This will develop a
side force which can produce vehicle lead.
The procedure in the figure (Lead Diagnosis) should be
used to make sure that wheel alignment is not mistaken
for tire lead.
• Part of the lead diagnosis procedure is different from

the proper tire rotation pattern currently in the owner
and service manuals. If a medium to high mileage tire
is moved to the other side of the vehicle, be sure to
check that ride roughness has not developed

• Rear tires will not cause lead.

Balancing Wheels Description

S5JB0A2401007

There are two types of wheel and tire balance: static and
dynamic. Static balance, as shown in figure, is the equal
distribution of weight around the wheel. Wheels that are
statically unbalanced cause a bouncing action called
tramp. This condition will eventually cause uneven tire
wear.

Dynamic balance, as shown in figure, is the equal
distribution of weight on each side of the wheel
centerline so that when the tire spins there is no
tendency for the assembly to move from side to side.
Wheels that are dynamically unbalanced may cause
shimmy.

Inflate tires to recommended pressure

Road test vehicle on level unrouned road in both directions

Switch front tires side to side and road test again

Lead corrected,

if roughness results, replace tires

Leads in same direction

Leads reverses direction

Put tires back in original position
and check alignment

Install a known-good tire on one front side

Lead remains install a known-good
tire in place of other front tire

Lead remains known-good tires are not good

Lead corrected replace tire

Lead corrected replace tire

I2RH01240007-01

1. Heavy spot wheel tramp

[A]: Before correction

2. Balance weights addition point

[B]: Corrective weights

3. C/L of spindle

1. Heavy spot wheel shimmy

[C]: Before correction

2. Balance weights addition point

[D]: Corrective weights

3. C/L of spindle

I2RH01240008-01

I2RH01240009-01

Wheels and Tires: 2D-5

Repair Instructions

General Balance Procedures

S5JB0A2406001

Deposits of mud, etc. must be cleaned from inside of rim.

WARNING

!

Stones should be removed from the tread in
order to avoid operator injury during spin
balancing and to obtain good balance.

Each tire should be inspected for any damage, then
balanced according to equipment manufacturer’s
recommendation.

Off-Vehicle Balancing
Most electronic off-vehicle balancers are more accurate
than the on-vehicle spin balancers. They are easy to use
and give a dynamic (two plane) balance. Although they
do not correct for drum or disc unbalance as does on-
vehicle spin balancing, this is overcome by their
accuracy, usually to within 1/8 ounce.

On-Vehicle Balancing
On-vehicle balancing methods vary with equipment and
tool manufacturers. Be sure to follow each
manufacturer’s instructions during balancing operation.

WARNING

!

Wheel spin should be limited to 35 mph (55
km/h) as indicated on speedometer.
This limit is necessary because speedometer
only indicates one-half of actual wheel speed
when one drive wheel is spinning and the
other drive wheel is stopped.
Unless care is taken in limiting drive wheel
spin, spinning wheel can reach excessive
speeds. This can result in possible tire
disintegration or differential failure, which
could cause serious personal injury or
extensive vehicle damage.

CAUTION

!

For vehicle equipped with ABS, using on-
vehicle balancing method with ignition
switch ON may set malfunction diagnostic
trouble code (DTC) of ABS even when system
is in good condition.
Never turn ignition switch ON while spinning
wheel.

Tire Rotation

S5JB0A2406002

To equalize wear, rotate tires according to figure. Radial
tires should be rotated periodically. Set tire pressure.

NOTE
Due to their design, radial tires tend to wear
faster in the shoulder area, particularly in
front positions. This makes regular rotation
especially necessary.

[A]: 5-tire rotation

NOTE
Applicable to vehicles equipped with 5
tires including spare tire all of which are
identical in size

[B]: 4-tire rotation

LH: Left-hand drive

RH: Right-hand drive

I3RH0A240001-01

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Политика конфиденциальности