Edgetech PORT LF, User Hardware Manual

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6-13
6.2.2 O-ring Considerations
The PORT-LF’s End Cap assemblies use a standard O-ring to provide watertight integrity to the Electronics
Housing. Under normal usage, proper care, and lubrication, the O-ring should provide several years of
usage. However, like the batteries, the O-ring is an inexpensive component, which is absolutely critical to
the successful operation of the entire system. Depending on the frequency of use, it is a good practice to
periodically replace the O-ring. It is essential to inspect the O-rings and sealing surfaces before and after
each deployment.
Prepare the sealing surfaces for assembly by cleaning with a lint-free towel or swab, moistened (if needed)
with alcohol. Inspect for scratches or nicks which could impair the O-ring’s ability to provide a seal. Apply
a light coat of O-ring lubricant (EdgeTech recommends Parker’s Super O-lube, be sure to use only silicone
grease) to the Housing and O-ring to facilitate insertion of the end cap. Make sure the lubricant is
compatible with Nitrile rubber. Inspect the O-ring for damage such as tears, dimples, or other defects in
the rubber. Replace any O-ring that is questionable or old. Lightly coat the O-ring with lubricant. Protect
O-rings when stretching them over large diameters.
CAUTION
Applying too much lubricant to the O-ring can compromise the seal.
6.2.3 Additional O-rings
There are additional O-rings that provide the watertight integrity to the Housing. These are located on the
purge port and release shaft. Check and replace these O-rings periodically as well.
6.2.4 O-ring Service Disassembly
1. Remove the Purge Port Plug, referring to sub-section 4.1.1 .
2. Remove the Release End, referring to sub-section 4.1.2 . (Do not go to step 4.1.3)
3. When you open the Release End
,
slide the electronics assembly out just enough to disconnect the
Transducer Cable from (JP1), as shown in
F
IGURE
6-20
.
Figure 6-20: The Transducer Cable Connected to the Electronics Board