16
Axle Transducer Mounting
Points to consider
For effective adhesion of the transducer the following points
need to be carefully considered:
• Location of the transducer site should be away from
moving parts.
• Mating faces need to be clean and dry.
• The temperature of the surfaces should be above 60ºF.
• Pressure needs to be applied to bond the surfaces during
initial installation.
1.
The transducers need to be located sufficiently far away
from any moving parts. The example below shows how
much leaf springs and shackles move when a truck is full
compared to when it is empty.
Step 5
Clean the prepared area with
the VHB surface cleaner,
allowing the solvent to
evaporate to leave a
dry surface.
Step 6
Example of a properly
prepared transducer site.
After cleaning the transducer
with VHB surface cleaner
apply pressure to the tape
using a roller.
Use a clamp to apply
pressure to the assembly
for 5 minutes.
Tip:
Identify the transducer’s connector or its extension cable’s
connector with the location of the transducer so you can
easily identify them when connecting to the junction box.
The most commonly used method is to number them to
match the numbers printed on the junction box label,
i.e. 1 – Left front, 2 – Right front and so on. This could be
done using an indelible marker or even a corresponding
number of cable ties.
3. Consider the temperature.
• The ideal temperature for application is 70ºF.
• It is not recommended to fit the VHB tape at temperatures
below 60ºF.
• Preferably fit the transducer to the springs in a workshop.
• Where necessary, warm the spring with a hot air gun prior
to bonding the transducer.
4.
Pressure needs to be applied to make the adhesive
contained in the VHB tape work.
And finally…
Fit cable ties to provide
mechanical support during
the bonding time (100%
bond in 72 hours). Cable
ties can be left in place
indefinitely. Movement of
the vehicle during this time
is acceptable.
2.
The transducer site must be thoroughly cleaned of all dirt
and debris. If necessary any loose paint and rust must
be cleaned down to bare metal. The site must be totally
dry and the surface should be sanded prior to transducer
installation. The following photos show each step of
preparing the transducer site.
Truck Empty
Truck Full
Fig 1.34
Fig 1.35
Step 1
Dirty and wet spring.
Step 2
Thoroughly clean the
transducer site with a non-
lubricant solvent cleaner.
Fig 1.36
Fig 1.37
Step 3
Clean off solvent and dry
the transducer site.
Step 4
Sand the area using
maroon Scotchbrite.
Fig 1.38
Fig 1.39
Fig 1.40
Fig 1.41
Fig 1.42
Fig 1.43
Fig 1.44
SI Onboard TruckWeigh™ Manual
Installation
Summary of Contents for VPG On-Board Weighing SI Onboard TruckWeigh
Page 5: ...5 Installation SI Onboard Installation SI Onboard TruckWeigh Manual Installation ...
Page 23: ...23 Setup Setup SI Onboard TruckWeigh Manual ...
Page 36: ...36 Installation SI Onboard SI Onboard TruckWeigh Manual Setup ...
Page 37: ...37 Calibration Calibration SI Onboard TruckWeigh Manual ...
Page 42: ...42 SI Onboard TruckWeigh Manual Calibration ...
Page 43: ...Appendices Appendices SI Onboard TruckWeigh Manual ...
Page 58: ...58 SI Onboard TruckWeigh Manual Notes ...
Page 59: ......
