RNLI Atlantic 85, Manual

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Activity 11 - Unplanned Maintenance
117
B Class Atlantic 85 Manual – First Issue, June 2017
Activity 11 - Unplanned Maintenance
Lever/cable installation
If it is necessary to replace any of the components of the
system with new items, then this procedure, produced by
the ILC staff, should be followed.
NOTE
Steps 1 to 4 need only be carried out if the cable
is not already fitted to the lever. A new unit will
normally be delivered with the cable fitted, in which
case all that must be done is to check that the
current length of thread on the inner cable is showing
where it is fitted to the clevis, as shown in Fig.2.
1. Remove upper rear dome headed allen bolt (main plate
screw 7-2299) and its spacer (7-2305) from the lever
assembly
2. Fit the lever end of the cable (7-2314) to the hexagonal
clevis (7-2311) on the lever. The cable should be fitted
such that the small locknut (KM5H) locks up against
the clevis with about 7mm of thread still showing on
the inner cable rod.
Ballast system
Overview
A refillable water ballast tank is fitted to the B-Class
Atlantic 85 integral to the hull structure and located under
the fore deck. The tank can be filled; contents held and
drained using a three-way valve (scoop) mounted on the
transom.
A lever and Bowden cable mounted on the starboard side
of the helm position operates the valve. The lever thus has
three positions and it is sprung loaded to hold it in the
relevant detent.
• Forward position
Hold, closes valve and retains ballast on board.
• Mid position
Drain, ballast runs out.
• Aft position
Fill, valve is open fully to allow 270kg of water
into the tank.
The deck immediately above the tank has three bailey
hatches in it. The largest one on the centreline is for
manual filling and inspection of the tank. The two smaller
outboard hatches either side are for inspection of the void
spaces around the tank and must not be filled with water.
A breather pipe is fitted at the forepeak to vent the tank
whilst filling. A stainless steel plate shields the helmsman
from any tank overflow.
dome headed
allen bolt
spacer
7mm