RDG603A17 – Issue 1 – Shire 30_40_50 WB/RB Manual
Page 35 of 51
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Replace the impellor.
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Replace the cover plate gasket if damaged.
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Replace any other worn components as necessary.
16. Engine Heat Exchanger Tube Stack Flushing
For Work Boats
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When the engine is cold, drain the water from the engine block. Remove the hose
from the tap and drain.
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Drain water from the heat exchanger. The drain plug is in the bottom of the heat
exchanger end cap.
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Disconnect the pipes and hoses from the engine heat exchanger.
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Remove the heat exchanger from the engine.
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Mark the position and remove the end caps from the heat exchanger.
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Carefully remove the tube stack from the centre of the heat exchanger.
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Fully flush between the tubes to remove any dirt of scum build up.
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Inspect the tube stack and replace if damaged.
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Reassemble and refit, checking the end cap “O” rings are in good condition.
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Ensure the end caps are fitted in the correct orientation. If they are not in the correct
orientation, overheating will occur which will not be covered under the warranty.
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Refill the engine with coolant as described earlier.
For River Boats
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When the engine is cold, drain the water from the engine block. Remove the plug
from the engine block by the starter motor.
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Drain water from the heat exchanger. The drain plug is in the bottom of the heat
exchanger / water cooled manifold.
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Mark the position and remove the end caps from the heat exchanger along with the
“O” rings.
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Carefully remove the tube stack from the centre of the heat exchanger.
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Fully flush between the tubes to remove any dirt of scum build up.
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Inspect the tube stack and replace if damaged.
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Clean out the manifold if required.
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Reassemble and refit, checking the end cap “O” rings are in good condition.
•
Ensure the end caps are fitted in the correct orientation. If they are not in the correct
orientation, overheating will occur which will not be covered under the warranty.
•
Refill the engine with coolant as described earlier.
17. Winterization of Seawater Cooling System (Work Boat & River Boat)
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To prevent frost damage to the seawater cooling circuit components due to water
