Routine Maintenance; Replacing The Towfish Breakable Washer - C-Max CM2 User Manual

CM2 Sidescan Sonar User Manual

10. Routine Maintenance

10. ROUTINE MAINTENANCE
Routine Maintenance
Maintenance is simple and is normally limited to the following tasks: -
(a) Immediately after use, thoroughly wash the towfish with fresh water if it has been exposed to seawater:
also wash the tow cable and winch
b) Daily, or whenever it is suspected that the breakable washer attaching the bail to the towfish has been
stressed in use, inspect the washer; refer to the replacement procedure below
c) Periodically inspect the whole system, particularly the cable, for accidental damage that might otherwise
go unnoticed
d) Clean the exterior of all items, when appropriate; for the STR or C-Case use a cloth lightly damped with
fresh water, no solvents
e) For galvanized steel armoured cable, every 90 days, or every 20 deployments, whichever is more
frequent, spray chain lube (or WD40 or similar) into the cable terminator. Insert a small screwdriver (or spike)
between the black PVC sheath and the tow cable, then insert the tube extension of the chain lube dispenser
alongside the screwdriver and inject enough lubricant to ensure that the internal strands of the cable, hidden
by the sheath, are protected from corrosion.
Protecting the Cable Armour from Corrosion, Galvanized Type only
f) Follow the winch maintenance instructions.
The towfish O-ring seals may be replaced every 5-7 years. This can be done by the user or by the Factory or
local representative. See the section on Replacing the Towfish PCB for advice on opening the towfish.

Replacing the Towfish Breakable Washer

The breakable washer secures the tow cable bail assembly to the spigot on the towfish. It should be replaced
if the bail has pulled free or the washer shows signs of stress. This washer should be inspected regularly.
Version 3.6 (2008)
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