METTLER TOLEDO 2158/2160/2162 Vertex Floor Scales Service Manual
(11/96)
10-4
Check Mechanical
Components
Due to the simplicity of the Vertex design, there are a few mechanical
components to troubleshoot. Ensure that the platform has freedom of
movement and that the load cells are not resting against the fixed
bumpers. If the load cells are contacting the fixed bumpers with no
motion in the scale platform, check the following:
1. Is the platform level or rocking? Reshimming may be required.
2. Check the rocker pins for unusual wear. Replace any rocker pins that
are unevenly worn or have flattened bearing surfaces.
3. Examine the rocker pin receivers sin the frame. If the bearing surface
is sunken, depressed, or unevenly worn, replace the frame.
4. If the fixed bumpers on the frame are excessively worn or damaged,
the entire frame will need to be replaced.
5. Inspect the platform and frame for any apparent physical damage.
Replace any platform or frame that is bent or contains broken welds.
6. Verify that the load cell overload gap is proper.
500 # - .009” to .015”
1250 # - .012” to .018”
2500 # - .017” to 023”
Load Cell
Replacement
Procedure
Remove power to the digital indicator and disconnect the instrument
cable.
Remove the access plate from the platform to gain access to the load cell
cable junction box. Remove the junction box cover and locate the
defective load cell terminal.
Disconnect the defective load cell cable from it’s terminal on the
summing PCB.
Loosen the water tight cable connector on the junction box and remove
the cable from the enclosure.
Carefully remove the platform from the frame assembly using eye bolts
in the holes provided. Position the platform onto a stable supporting
surface that allows access to the defective cell and cable as well as
offering protection to the other cells during disassembly.
Affix a string to the end of the defective load cell’s cable. The string
Note: The instrument cable may need
to be removed from the junction box to
allow the platform to be removed.
Note: 5,000 # load cell does not
have an overload stop.
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