HRP05/HRP11/HRP17 Accu-Steer Pump-Set
Kobelt Manufacturing Co. Ltd.
Rev D
HRP07-HRP11-HRP17_MANUAL
11 of 28
Figure 3: Connections in Top Face of Hydraulic Manifold
Three hydraulic connections are required to the pump-set:
•
Connect ports ‘A’ & ‘B’ to the steering cylinder ports. It is not critical to identify which
of the steering lines is Port or Starboard as most new autopilots will determine the
pump direction and program the drive outputs to suit.
•
Conn
ect the ‘T’ port to the header tank or helm pump case. This third line is critical, as it
provides make up oil and allows the pump-set to vent any air, which may enter the
pump-set from the steering lines.
Shut-off or isolation valves for all three lines are recommended. If the pump-set fails, the
isolation valves can be shut off and manual steering maintained.
If more the one helm pump is used, a return/fill line must be installed to connect the cases of
all the helm pumps together.
With steering systems where the fill/interconnect line is pressurized (e.g. - Hynautics or
Teleflex) the recommended operating pressure is approximately 20 to 25 psi. The plumbing is
connected as noted by the port names on the top of the unit shown in Figure 3.
The shaft seal on the HRP pump-sets are rated to 50 psi. Exceeding
this pressure with cause a shaft seal failure and void the warranty.
Do not connect the output lines (Cylinder) to the tank (T) port.
Failure to observe this caution will cause a shaft seal failure and void
the warranty.
