Circulation pump installation details (models 463.250/323, code H12)
3 - Return hose of the cooling tract (heater); 4 - Inlet hose of the cooling path; 5 - Heater cover; 8 - Electrical wiring connector of the circulation pump; 13 - Mounting clamp; 17 - Bolt; A6 - Additional heater STH; A6m1 - Circulation pump
1. By opening the cap of the expansion tank, relieve the pressure in the cooling system.
2. Remove the STH auxiliary heater assembly (see Section Removal and installation of additional heater STH (with appropriate equipment)).
3. Disconnect the wiring connector (8) circulation pump, - the connector has an asymmetric shape, which guarantees the uniqueness of its docking.
4. Turn out a fixing bolt (17), remove clamp (13) and dismantle the circulation pump assembly (A6m1), by disconnecting it from the supply hose (4).
5. Installation is carried out in the reverse order.
6. Finally, bleed the air from the cooling system path and check the relevant components for signs of leak development, then check that the STH auxiliary heater is functioning properly (see Section Removal and installation of additional heater STH (with appropriate equipment)).