COOLING SYSTEM - M.8
closed water circuit. The inside of these tubes which
have the raw water (sea water) passing through them
are more likely to require cleaning.
If these are not badly scaled enough to require the
solution treatment described above, they can be cleaned
by pushing a length of 1/8 in (3.2 mm) diameter steel rod
down the tubes to dislodge all foreign matter. It is
important to note that when carrying out this exercise,
the rod should be pushed through the tubes in the
opposite direction to that in which the water flows. Do
not use undue force to push the rod through the tubes.
The other components of the assembly should be
cleaned before re-assembly and as these have no
hidden features, no special instructions are considered
necessary.
Re-Assembly
If the main aluminum casing has been removed from
the engine it is best to refit this to the engine first before
re-assembling the heat exchanger itself, although, if
conditions are too cramped, it is quite possible to
completely re-assembly the heat exchanger first, and
then re-attach it to the engine.
1.
Place the two tube stacks in their respective
casing and fit the "O” seals over each end. It is
advisable to renew these seals if they appear
badly worn or deformed.
2.
The complete oil cooler should now be slid along
the tie rod, taking care that the tube stack is
located in the end cover.
3.
The spacing ring should be replaced in position
and the tie rod complete with oil cooler assembly
fitted to the main casing.
4.
The other end cover can be replaced and the
cap nut complete with its copper and asbestos
washer refitted. This cap nut should be
tightened to a torque not exceeding 25 Ibf ft (3,5
kgf m) - 34 Nm.
GEARBOX OIL COOLER
To Remove
1.
Uncouple inlet and outlet water connections to
the oil cooler.
2.
Remove inlet and outlet oil pipes.
Fig. M.10.
Exploded View of Lubricating Oil Cooler and Filter.
(lowllne engines)
