MTS Hydraulic Power Unit Model 506-92 - Manual (Page 36)

Installation 4-5
4 . 2 . 2 Input Power
Electrical
connection
procedure See Figure 4-3 and perform the following procedure to make the electrical
connections.
1. Connect a solid earth ground from the power disconnect switch to
the starter assembly.
2. Connect the three input leads from the disconnect switch to the three
terminals located on the starter assembly.
Polarity check Perform this procedure to ensure that electrical power is properly
connected to the HPU:
1. Apply ac power to the HPU. The Power On indicator should light.
2. Jog the supercharge pump motor by pushing the Start button with
neither main pump selected, then immediately pushing the Stop
button.
WARNING !
High voltage is present in the starter box if power is not removed.
Failure to remove power from the box may cause death or injury.
Remove electrical power at the power disconnect switch.
3. If the supercharge motor is rotating in the direction indicated by the
arrow on the pump motor housing, electrical connections are
correct. If it is rotating in the opposite direction of the arrow, remove
ac power to the HPU and switch two of the three input power leads
to the HPU (refer to Figure 4-3).