HPU400 Hydraulic Power Units
Kobelt Manufacturing Co. Ltd.
Rev A
MNL_HPU400
17 of 33
4.3
F
UNCTIONAL
T
EST
The Function Test should be carried out while the vessel is still at
dock and before it is taken out to sea after installation has been
completed.
After installation and filling has been completed, perform the following function tests:
1.
Power ON the HPU
2.
Power ON the autopilot (or electronic jog lever).
3.
Active the autopilot (or electronic jog lever) to command motion of the HPU.
4.
Verify that the rudder position has changed.
5.
Set the autopilot to manual mode and operate the pump-set to determine if the
Port and Starboard directions are correct.
6.
If the rudder goes the opposite way than expected.
a.
Reverse the two electrical connections between the solenoids and the
autopilot (or electronic jog lever).
Most new autopilot systems will perform this test during their
dockside set-up procedures.
7.
Operate the pump-set and note the
“
hard-
over”
to
“
hard-
over”
(HO to HO) time.
8.
Verify that it is in the range of 10 to 16 seconds. Times outside of this range
indicate a mismatched pump-set for the steering system.
9.
Confirm the unit develops rated pressure during operation.
