"Ignoramus7775" wrote in message
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Don. thanks. I believe that I do not need to do any calculations. If I
assume that P = A + B * W, then all I need to know to find A and B is
the pressure with nothing on the forks, and the pressure with, say, 2
tons on the forks. Once I know A and B, I can make a little table on a
card and put it next to the gauge.

For hydraulics, I would rather buy something new at McMaster for $40,
than something unknown on ebay for $9.95 plus $8 shipping.

Thanks, though, for confirming that it is doable.
i

I added such a gauge to my homebrew front end loader, to set the overload
pressure relief which is somewhat temperature (viscosity) sensitive. The
glycerine dampens vibrations from the hydraulic pump so the needle isn't a
blur. If you mount the gauge in a panel or box it will be better protected
from damage and you can mark the load weights around the dial and quickly
see if the needle is nearing the max.

The gauge cost about $20 in a local hydraulic parts store.

jsw