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Page 53
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Maintenance
A705-40-880 Issue B
Figure 12 - Clean the cooling-water flow indicator
5.12.4
Clean the heat exchanger
and use the following procedure to clean the heat exchanger.
1. Undo the fitting nuts (2, 9) of the cooling-water connectors to disconnect the cooling-water pipes from the top
and bottom end-caps of the heat exchanger.
2. Remove the four bolts (1) which secure the top end-cap (11) to the heat exchanger and remove the end-cap and
the O-ring (10).
3. Remove the four bolts (8) which secure the bottom end-cap (6) to the heat exchanger and remove the end-cap
and the O-ring (5).
4. Use a pipe cleaner which will pass through a 400 mm length of 5 mm diameter tube to clean and remove any
scale from each tube in the tube stack (3).
5. Clean the O-ring sealing faces of the top and bottom end-caps (11, 6) and the top and bottom of the heat
exchanger.
6. Fit the new O-ring (5) and then use the four bolts (8) to refit the bottom end-cap (6) to the heat exchanger.
7. Fit the new O-ring (10) and then use the four bolts (1) to refit the top end-cap (11) to the heat exchanger.
8. Reconnect the fitting nuts (2, 9) of the cooling-water connectors to the top and bottom end- caps (11, 6).
1. Bolt
2. Bezel
3. Gasket
4. Dome
5. O-ring
6. Ball
7. Body
