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Page 51
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Maintenance
A705-40-880 Issue B
5.12
Clean the cooling system
5.12.1
Drain the coolant from the cooling system
Clean the cooling system every year or when you think that the efficiency of the cooling system is reduced because
of deposits or other contamination in the heat exchanger or cooling-water pipelines.
1. Refer to
. Ensure your cooling-water supply is switched off, then turn the adjuster knob on the TCV (7)
to the '0' setting.
. Push down the coolant filler-cap (1) and turn it anticlockwise by a 1/4 of a turn to release the
pressure in the cooling-jacket: see detail A.
3. Turn the coolant filler-cap (1) anticlockwise and remove it from the pump.
4. Refer to
. Place a suitable container under the cooling-water connections (3, 5) on the services panel,
then remove the connectors (4, 6) on your cooling-water supply and return pipelines from the connections on
the services panel and allow the cooling-water to drain from the pump.
5. Drain the coolant from the pump: refer to
and
. Place a suitable container under the drain-plug (7), then remove the drain-plug (7) and allow
the cooling-water to drain from the heat exchanger.
5.12.2
Clean the cooling-water filter
The location of the water filter is shown in
, item 10.
1. Refer to
. Undo the hex head nut (3) and remove the filter element (4) and the gasket (2) from the
cooling-water filter-body (1).
2. Empty the deposits from the filter element (4); if required, you can use a compressed air supply to blow the
deposits from the filter element.
3. Fit the new gasket (2) and the cleaned filter element (4) to the cooling-water filter-body (1).
5.12.3
Clean the cooling-water flow indicator
The location of the cooling-water flow indicator is shown in
1. Refer to
. Remove the four bolts (1).
2. Remove the bezel (2), gasket (3), dome (4), O-ring (5) and ball (6) from the body of the cooling-water flow
indicator.
3. Dispose of the O-ring and the gasket (3).
4. Clean the ball (6), the inside of the dome (4) and the inside of the body (7) to remove any deposits; if necessary,
use a suitable cleaning solution.
5. Use the new O-ring and refit the ball (6), O-ring (5), dome (4), gasket (3) and bezel (2) to the body (7) of the
cooling-water flow indicator.
6. Use the four bolts (1) to secure the bezel to the body (7) of the cooling-water flow indicator.
WARNING
Allow the pump to cool down and release the pressure in the cooling jacket before you remove the
coolant filler-cap. If you do not, hot coolant may be ejected from the cooling jacket and may cause
injury.