User's Manual Part 2

GS550 UNDERHOOK
18
ChApTEr 6: mAiNTENANCE
6.3 Replacing Load Cell Antenna
Heavily damaged antennas (ripped out, sheared off,
wire exposed and fraying etc.) should be replaced
to ensure effective communication between the
sensor and the cabin display unit.
1. Clean dust, grime and water from the sensor.
2. Identify the short black whip antenna and the
white hex bolt securing it.
3. Inspect the antenna for signs of obvious
physical damage.
4. Carefully unscrew the white nylon hex bolt
completely and slide it up the antenna.
Figure: Unscrew the white nylon hex
5
ThE iNTEriOr OF ThE SENSOr muST BE
prOTECTEd FrOm duST, grimE, ANd
wATEr AT ALL TimES.
CAUTION
5. Grip the antenna by the base of the black
plastic sheathing and pull it straight out of the
hole in which it is seated. Place the old antenna
carefully aside.
Figure: Pull out the antenna
2. Hold the new antenna by the black plastic
sheathing and guide it through the hole in
the sensor box. Carefully seat the antenna
in its mating connector. When the antenna is
correctly seated, pulling on it will be met with
light resistance.
6
1. Slide the white nylon hex bolt to the middle
of the length of the new antenna. Coat the
exposed metal foot of the new antenna with
an electrical insulating compound by carefully
inserting it in the mouth of the compound tube.
Figure: Coat the exposed metal foot of the antenna
8
Electrical insulating
compound
*
* Suggest Dow Corning dielectric grease No.4 or
Molycote 111 grease.
4. Ensure the O-ring and hole collars are still on
the plate and place to one side.
5. Place the load cell on its side and proceed to
remove from the clamp.
6. Note the polarity direction marked on the
battery clamp before replacing battery.
7. Place in position and ensure the battery has
clicked into place on both sides.
8. Inspect the O-ring and plate. If required the
O-ring can be cleaned and grease re-applied at
this time. Use 111 grease or a suitable silicon
based grease for O-rings.
9. The plate and cell surface should be free of dirt/
grit before re-assembly.
10. Replace plate into position.
11. Proceed to secure fasteners to the plate back
onto the load cell. Do not overtighten – a gentle
tighten of the fasteners is sufficient.
12. The plate is correctly positioned when none of
the fasteners are loose and are hand tightened.