Hru Replacement - mcmurdo Smartfind G8 AIS User Manual

7.4

HRU replacement

If you have an EPIRB mounted in a float-free enclosure, then it contains a
Hydrostatic Release Unit (HRU). This has a replacement interval which is
marked on the HRU and on the float-free enclosure (typically every 2 years –
see page 24).
WARNING – Failure to replace the HRU at the required replacement
interval may result in it not actuating correctly and failing to release the
EPIRB in an emergency.
You can obtain a replacement HRU at a local marine store; ask for Orolia Ltd
HRU Replacement Kit (23-134-001B or 23-134-002B). The kit is complete with
HRU and all required accessories including an instruction sheet.
The HRU replacement procedure is as follows:
1. Locate the dial on the enclosure cover, press in and turn dial anti-
clockwise to the unlocked position and remove the cover (see page 11).
2. Remove the EPIRB from the lever arm and stow it in a dry place (see
page 11).
WARNING – The EPIRB will activate if the sea contacts (see page 5) come
into contact with water.
3. While holding down the lever arm to take up the force of the spring,
push the HRU back then slide upwards out of the slot in the lever arm.
Remove the HRU and slowly release the lever arm.
Page 28