General Information
1
S023074 PA1
2020-05-12
15
Centre of Gravity (CoG) Height (Z)
The CoG Height influences axle weights while braking and roll stability.
The highest acceptable limit for the CoG Height (Z) is stated in the table above and can be
calculated using the method below.
Centre of Gravity Height Test Procedure
WARNING
It is the responsibility of the converter that the following Centre of Gravity Test
Procedure is undertaken in a safe and controlled manner and that suitable
equipment is used throughout the procedure.
Use four weighing scales, one under each wheel of the vehicle.
The vehicle is to be first weighed and measured in a horizontal position. Then the front wheels
are to be raised to three different heights and weights and measurements taken again each
time.
NOTE
The higher the front of the vehicle is lifted the more accurate the results will be. This
will be restricted by physical limitations of the ground clearance of the vehicle, the
height of the roof, the equipment used and environment.
NOTE
This procedure can also be repeated raising the rear wheels for increased accuracy.
For the best possible accuracy the following preparations should be made:
– fix wheel travel using solid shocks or spring fixes for example
– Increase tyre pressure to maximum allowed value
– remove all moving loads from the vehicle or make sure that they are securely fixed in place
– close the vehicle doors
To calculate the Centre of Gravity Height (Z) follow the procedure below.
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