SPACE s.r.l.
Soc.a socio unico
PFB035 SERIES – PFB040 SERIES
PFB045 SERIES – PFB060 SERIES
SPRT102/4 SERIES – SPRT102/5 SERIES
SPRT102/6 SERIES – SPRT102/7 SERIES
Code M0247 - Ver.1.4
(09/2016)
SPACE s.r.l. – 10090 TRANA (TO) Via Sangano, 48
Tel. (+39) 011/ 934 40 300 – Fax (+39) 011/ 933 88 64
e-mail: info@spacetest.it - www.spacetest.com
7.4. Adherence test procedure
Preparing for the test
The adherence test consists in measuring the weight bearing on each wheel during swinging of
the platforms on which these are resting.
The results of the adherence test indicate the minimum weight determined during such shaking
in relation to the static weight of the wheel. The greater the adherence, the better the road-holding
of the vehicle.
It should nevertheless be remembered that wheel adherence does not only depend on suspensions,
but also on a series of other factors, like tire pressure, load distribution, any play on the arms.
Consequently, before performing the test, check to make sure that the vehicle is roadworthy.
Reading are normally assessed as follows:
Adherence 60% good
Adherence 20 60% acceptable
Adherence < 20% below standard
Difference > 15% excessive
Difference 15% acceptable
If below standard adherence or excessive differences are shown, the shock absorber should not
be immediately replaced. It is first best to check whether the out-of-tolerance result might be
due to the other factors mentioned previously (tire pressure, load distribution, etc.).
Performing the test
Move the vehicle axle onto the adherence-test platforms, visibly at right angles to the platform
axis. The test starts automatically once the system detects a weight of at least 60-80 daN on both
platforms. The left platform is first started and then the right platform.
Figure 47
At the end of the test, the outer indicators on the screen display the percentage adherence readings
of the left and right wheels and the percentage difference between these.
The displayed readings are automatically stored after a few seconds. Within this time, the operator
can nevertheless press the F2 key / to display the test graph.
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