H2.5K And H5K Hydraulic Load Cells - Cardinal GUARDIAN Owner's Manual

H2.5K and H5K 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 pin will go into the cell. If not, we need to determine for sure that
the cell has lost oil.
1. Take a stiff piece of wire (.045 welding wire works well) and use it to feel the position of the
slot in the load cell. If the cell is low or out of fluid you can feel the top edge of the slot with
the wire, and above it the piston.
Figure No. 13 – Probing cell gauge port to determine piston position.
2. 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.
3. 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.
4. 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.
5. 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 gauge snaps in the groove in the piston.
1780-M057-O1 Rev C  Hydraulic Floor Stand Tank/Hopper
TROUBLESHOOTING, CONT.
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