Hydraulic Servo
There is a relatively easy test for hydraulic servo (booster amplifier ???) leakage:
Run the engine at abt. 2000 RPM's for a few seconds, then shut it off. Carefully disconnect the return line from servo to Pentosin reservoir at the servo end (have rag handy) and observe for a couple of minutes. Only a few drops of Pentosin should come out from the servo. If a more definite flow is present, the servo is leaking. If the servo leaks during this test, there is a high probability that pressure accumulator is O.K.
