Depends on how the motor is wired. In series or parallel. 3.47 for series and 6 for parallel. You can check the winding resistance or look at the cable connection to figure out which way it is being used. Normally these are driven with an 6S, 6SX or Zeta4 drive, but seems to me I have seen some data that they will run on a S8 drive near 8amps in parallel for short durations.
Parker S drive PDF