The 737-200 uses both engine driven pumps to power the "A" system, and both electric pumps to power the "B" system. The "A" system hydraulic fluid "intercooler" is located in the #1 fuel tank (left wing), and the "B" system cooler is in the #2 fuel tank (Right wing). Our FOM says minimum of 1675 pounds in each wing tank, during ground operations. Just a wee bit different in detail.
