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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
Refer to Figure 13 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
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