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SERVICE BULLETIN
DATE:
1/17/85
BULLETIN NUMBER: 147
MODEL:
WlOTwo, W13, W18, W2l, W27, W33, W46, W52, W58, W70, WlOO
3KW, 4.4KW, 7.7KW, 6KW, 6.5KW, 8KW, llKW, l2.5KW, l5KW,
20KW, 25KW, 32KW
SUBJEC~
Installation - Coolant Recovery Tank Kit #44977
A coolant recovery tank kit is supplied with each Westerbeke generator
(gasoline and diesel)
and propulsion engine.
The purpose of
this
recovery tank is to allow for coolant expansion and contraction during
engine operation without the loss of coolant and without introducing
air into the cooling system.
This coolant recovery tank should be installed in a location where it
can be monitored and coolant added to it as needed.
A stainless steel
mounting bracket is supplied with each kit, along with a 30" length of
clear plastic hose with clamps to connect between the engine manifold
fitting and the hose spud on the base of the recovery tank.
The coolant recovery tank should be mounted at engine manifold level
or above it, where it will be accessible for monitoring and filling.
FILLING THE ENGINE'S COOLING SYSTEM:
A.
The engine cooling system must be filled completely full and be
free of all air.
Pay particular attention to propulsion engines
having domest'ic hot water heaters plumbed to the engine's fresh
water cooling circuit, ensuring that that portion of the system is
free
of
air,
and
engine
coolant
circulation
is
taking
place
through the coils of the domestic water heater.
B.
With the engine filled with coolant and free of air, the manifold
pressure
cap
can
then
be
installed
and
coolant
added
to
the
plastic recovery tank.
Fill this tank so the level is between ADD
and MAX.
Replace the plastic cap on the recovery tank.
Coolant
from
the
engine, when heated during engine operation, will
expand and lift the spring-loaded manifold pressure cap and .enter the
recovery tank via the hose connecting the recovery tank to the mani-
fold.
When the engine is shut down and cools, a small check valve in the
pressure
cap
is opened
by
the
contraction of
the
engine coolant,
allowing some of the coolant in the recovery tank to be drawn back
into the engine's cooling system free of air and without loss.
Continued ••••••••••••••••••••••
114
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