1780-M057-O1 Rev C Hydraulic Floor Stand Tank/Hopper
TROUBLESHOOTING
SST Hydraulic Load Cells
If you are having a problem with a cell loosing fluid (it will always be weighing light) remove the
gauge port and see if the gauge will go into the cell. If not, we need to determine for sure that the
cell has lost oil.
1. On the initial inspection, make sure the .028 feeler gauge will not enter the cell gauge gap.
It is very important that if on inspection you find the gap at .035 inch that you find the
source of the leak and eliminate it.
2. There is a rubber wear pad inside the cell that may compress slightly with use. A gap that
has increased to .029 may just be because of the rubber pad compressing. Any increase
in the gap above .029 means that fluid has left that circuit either at a cell, tube, or fitting, or
inside the totalizer enclosure in a hose or manifold.
3. If the cell has lost fluid, you must find the source of the leak and fix it. Simply pumping
more oil in the cell may get it going again but it will soon fail.
4. Clean all fittings and the area around the cell (spray brake or carb cleaner works well)
then wrap the fittings with absorbent tissue and apply a heavy load to the cell that appears
to be leaking.
5. After a period of time remove the tissue and inspect it for signs of oil. If no external leaks
can be found the cell should be considered suspect.
6. If you are unsure of the level of oil in the cell ALWAYS open the bleed port and let oil out of
the cell and add it back until the .028 feeler gauge will not enter the cell gauge gap.
7. After the problem has been found and fixed, remove all load from that cell and bleed and
gap it to .027 inch. Then apply load and verify the gauge gap.
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