85-70-20 Water Pump
85-70-21 Removal of the Water Pump
1. Drain the coolant - refer to the applicable Aircraft Maintenance Manual.
2. Remove the coolant pipe - refer to the applicable Aircraft Maintenance Manual.
3. Remove the v-ribbed belt - refer to Chapter 85-40-11.
4. Disconnect the screws [1] [2].
5. Remove the water pump [3].
6. Clean the sealing face.
85-70-22 Installation of the Water Pump
1. Install the new O-ring [4]
2. Install sealing ring [5]
3. Lubricate both rings with acid free lubrication.
4. Put on water pump [3] in position.
Inspect O-ring and sealing ring for correct installation.
5. Screw down the water pump and torque the screws with 20 Nm.
6. Install the coolant pipe - refer to the applicable Aircraft Maintenance Manual.
7. Install the v-ribbed belt - refer to Chapter 85-40-12.
8. Fill and bleed the cooling system - refer to the applicable Aircraft Maintenance
Manual.
9. Clean the working area.
10. Perform an engine ground run according to Chapter 71-00-03.
11. After the ground run inspect coolant system for leakage.
For coolant information please refer to Chapter 05-20-17 Coolant
Fig. 85 - 118 Fig. 85 - 119
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