MANATEC JUMBO HCV, Руководство по эксплуатации

Страница: 19 / 135

Ref.: MEL-WA(3D HCV) - OM Ver.1.7
14
5.2. TOE
Unlike Caster and Camber, which are measured in degrees, Toe is most frequently
measured in fractional Inches, Millimeters or Decimal degrees. An incorrect Toe
setting is one of the main alignment factors that cause excessive tyre wear. Front and
rear Toe are the same in definition, with the adjustment capabilities and procedures
being the only actual difference.
TOE is the difference between the leading edge (or
front) and trailing edge (or rear) of the tyres.
TOE-IN is the measurement in fractions of an Inch, Millimeters or Decimal of degrees
that the tyres are closer together in the front than they are in the back.
Fig. 4
TOE-OUT is the same measurement, except the tyres are further apart in the front than
in the rear.
Fig. 5
Slight Toe-in is preferred to Toe-out on most vehicles because steering is aligned while
vehicle is stationary. When the vehicle is moving, linkage components flex causing a
change in alignment
angles. This is classified as “Running Toe”. Running Toe should
be zero to maximize tyre life and achieve least rolling resistance.
The usual tendency is for the tyres to turn outward while the vehicle is in motion, so
most vehicles are designed with a static Toe-in setting. The static Toe-in setting will
become zero as the linkage flexes when the vehicle is in motion. Always set Toe to the
manufacturer‟s specifications. On vehicles with Toe adjustment capability on the rear,
an alignment
specialist can go beyond manufacturer‟s specifications according to
vehicle usage and customer requirements. With the proper equipment, the rear axle
can be adjusted to perform aggressively toward demanding load and road conditions.
Vehicles with FWD and independent rear suspensions are more likely to have
adjustable rear Toe. As with rear Camber, properly adjusted rear Toe will contribute to
improved steering & handling characteristics. Full floating tables (Rotary plates) must
be used under rear tyres whenever Toe is to be adjusted. If rear Toe is out of spec a
thorough inspection must be done, whether or not rear Toe is adjustable.
Components found to be defective must be replaced. On vehicles that do not have
rear Toe adjustment capability and Toe is not within specifications, replacing defective
components may bring Toe within specifications.
Normally TOE is specified in „mm‟ or „inch‟. That is by how much the front of
the Wheel Rim is IN or OUT compared to the rear side of the Wheel Rim. But,
System follows the unit of Degrees and Minutes. Even, if the TOE is entered in
„mm‟ or „inch‟, it converts the same into corresponding Degrees and Minutes