Suzuki XL7 2007 Service Manual page 1086

2D-22 Wheels and Tires:
Tire and Wheel Assembly Balancing - Off
Vehicle
WARNING
!
Failure to adhere to the following precautions
before tire balancing can result in personal
injury or damage to components:
• Clean away any dirt or deposits from the
inside of the wheels.
• Remove any stones from the tread.
• Wear eye protection.
• Use coated weights on aluminum wheels.
Tire and Wheel Assembly Balancer Calibration
Tire and wheel balancers can drift out of calibration over
time, or can become inaccurate as a result of heavy use.
There will likely not be any visual evidence that a
calibration problem exists. If a balancer is not calibrated
within specifications, and a tire and wheel assembly is
balanced on that machine, the assembly may actually be
imbalanced.
Tire and wheel assembly balancer calibration should be
checked approximately every 2 weeks, if the machine is
used frequently, and/or whenever the balance readings
are questionable.
Tire and Wheel Assembly Balancer Calibration
Test
NOTE
If the balancer fails any of the steps in this
calibration test, the balancer should be
calibrated according to the manufacturer's
instructions. If the balancer cannot be
calibrated, contact the manufacturer for
assistance.
Check the calibration of the tire and wheel assembly
balancer according to the manufacturer's
recommendations, or perform the following test.
1. Spin the balancer without a wheel or any of the
adapters on the shaft.
2. Inspect the balancer readings.
Specification
Zero within 7 g (¼ oz)
3. If the balancer is within the specification range,
balance a tire and wheel assembly - that is within
radial and lateral runout tolerances - to ZERO, using
the same balancer.
4. After the tire and wheel assembly has been
balanced, add an 85 g (3 oz) test weight to the wheel
at any location.
5. Spin the tire and wheel assembly again. Note the
readings.
– In the static and dynamic modes, the balancer
should call for 85 g (3 oz) of weight, 180 degrees
opposite the test weight.
– In the dynamic mode, the weight should be called
for on the flange of the wheel opposite the test
weight.
6. With the assembly imbalanced to 85 g (3 oz), cycle
the balancer 5 times.
7. Inspect the balancer readings:
Specification
Maximum variation: 7 g (¼ oz)
8. Index the tire and wheel assembly on the balancer
shaft, 90 degrees from the previous location.
9. Cycle the balancer with the assembly at the new
location.
10. Inspect the balancer readings:
Specification
Maximum variation: 7 g (¼ oz)
11. Repeat steps 8 through 10 until the tire and wheel
assembly has been cycled and checked at each of
the 4 locations on the balancer shaft.