14/11/2022
912S-03968 - 01.02
31
EPIRB3 Pro USER MANUAL
Side View
Locating idges
r
Spring
B
Vew
ottom
Retaining Flange
9.5 HRU Replacement
The EPIRB3 Pro is mounted in a Auto Release Housing which contains a HR1E Hydrostatic
Release Unit (HRU). The HRU unit must be replaced two years after installation - the expiry
date is marked on the HRU and on the front of the housing.
If this date has been reached, the HRU must be replaced with an Ocean Signal HR1E.
Failure to do so may result in the HRU not operating correctly during an emergency
situation.
Lift the release mechanism by pulling against
the spring and remove the EPIRB from the
housing.
Push the HRU down against the spring and
remove the locking pin. Carefully remove the
HRU from the spring.
Using the new HRU, locate the two retaining
ridges (at the bottom of the HRU) onto the
spring. Carefully push the HRU against the
spring.
Push the HRU into position as shown. Push
the locking pin home with the retaining flange
pointing down. Load the EPIRB into the housing.
