Measurement preparations
Pre-measurement checks
Before carrying out measurements, check with the help of play detectors, that the vehicle has no
excess play in the bushings and steering linkage.
The following items should be checked before performing wheel and axle measurements:
1. Tire pressure:
Are the correct tires assembled and inated to the correct pressure?
2. Bearing play:
Unnecessary play in kingpins, steering gear, and the balancing arms support on support axle
vehicles.
3. The attachment of the axles:
Play in spring-eye bolts, shackles, broken centre rivets, broken springs and loose spring straps.
4. Worn torsion bar bushings.
NOTE
Any faults concerning the above mentioned points should be corrected before
proceeding with measurements.
5. Check ride height.
6. Make sure that the wheel alignment is calibrated.
7. Check RTD (Rest Thread Depth)
8. Check for uneveness in the oor.
9. If self-centering frame gauges are used on chassis, make sure that they are symmetrically mounted.
i-track II
Measurement preparations
65
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