Ford 640 Hydraulic Pump

Doug (OH) · Jul 13, 2015

Hi everyone, Short of knowing the year and serial number (or pulling the pump), how do you know if you have a piston pump or vane pump? My 640 is a
1955. I don't have the serial with me at the moment. Does the housing look physically different at all between the two styles?
Thanks in advance!
Doug (OH)

Dean · Jul 13, 2015

The piston pump is cylindrical in shape. The vane pump is rectangular.

Dean

Doug (OH) · Jul 13, 2015

Thanks, Dean!

Doug (OH) · Jul 13, 2015

In that case, I must have the piston pump. What was the reason for the change? Smith's Ford page states "The original NAA hydraulic pump was the vane type that ran whenever the engine did which meant the hydraulics always worked as long as the tractor was running." Thanks! Doug

Dean · Jul 13, 2015

Most likely, the change from the vane to the piston pump was due to cost considerations.

Dean

Doug (OH) · Jul 13, 2015

Seems to be the norm...

souNdguy · Jul 14, 2015

piston pump is live too. same drive location.

Ford 640 Hydraulic Pump

Doug (OH)

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Dean

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Doug (OH)

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Doug (OH)

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Dean

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Doug (OH)

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